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Interface and code-skeleton for Auto3 shared library, and Lua 5.0.3 source tree.

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Originally committed to SVN as r1155.
This commit is contained in:
Niels Martin Hansen 2007-05-02 12:18:04 +00:00
parent ce2b203251
commit 3008d26a6f
66 changed files with 20618 additions and 0 deletions
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18
auto3/README Normal file
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Automation 3 support in Automation 4 needs to be built as a separate library,
to be able to have two versions of Lua side by side. This is required since
Automation 3, and especially scripts written for it, relies on the Lua 5.0
API.
Compiling on Windows
--------------------
If you are building on Windows, be aware that Microsoft Visual C++ 2005
(version 8) CAN NOT COMPILE LUA 5.0 CORRECTLY. While the build will succeed,
the built binaries are broken and do not work correctly.
You need to use Microsoft Visual C++ .NET 2003 (version 7.1) to build the
Windows version of this library. Other compilers might also work.
You should not need to build this DLL yourself even if you are building
Aegisub; just get one built on someone else. Unless, of course, you want to
hack the Auto3 code.

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// Copyright (c) 2007, Niels Martin Hansen
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of the Aegisub Group nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// -----------------------------------------------------------------------------
//
// AEGISUB
//
// Website: http://aegisub.cellosoft.com
// Contact: mailto:jiifurusu@gmail.com
//
#include "auto3.h"
#include <stdlib.h>
// Win32 DLL entry point
#ifdef WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
BOOL APIENTRY DllMain( HANDLE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
// TODO: Destroy any still-alive scripts/interpreters here on unload?
return TRUE;
}
#endif
// Create a new interpreter
// Returns pointer to interpreter object if successful, otherwise NULL
// If this function fails, the error message is filled into the char* pointed to by error (may be NULL)
AUTO3_API struct Auto3Interpreter *CreateAuto3Script(filename_t filename, char **error)
{
return NULL;
}
// Release an interpreter
AUTO3_API void DestroyAuto3Script(struct Auto3Interpreter *script)
{
}
// Our "malloc" function, allocate memory for strings with this
AUTO3_API void *Auto3Malloc(size_t amount)
{
return malloc(amount);
}
// Our "free" function, free generated error messages with this
AUTO3_API void Auto3Free(void *ptr)
{
free(ptr);
}
// Start the script execution
// script->logcbdata and log->rwcbdata should be set to sensible values before this call.
// The value fields in the config dialog should also be set to values entered by the user here.
// This will first call get_meta_info,
// then reset_style pointer followed by a number of calls to get_next_style,
// then a call to reset_subs_pointer followed by a number of calls to get_next_sub,
// then actual processing will take place.
// After processing, start_subs_write will be called, followed by a number of calls to write_sub.
// Any number of calls to the logging/status functions can take place during script execution
AUTO3_API void RunAuto3Script(struct Auto3Interpreter *script)
{
}

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// Copyright (c) 2007, Niels Martin Hansen
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of the Aegisub Group nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// -----------------------------------------------------------------------------
//
// AEGISUB
//
// Website: http://aegisub.cellosoft.com
// Contact: mailto:jiifurusu@gmail.com
//
#pragma once
#ifdef AUTO3LIB
#include "lua/include/lua.h"
#endif
#ifdef __cplusplus
extern "C" {
#endif
// On Win32, filenames are wide, but UTF-8 everywhere else
#ifdef WIN32
typedef wchar_t* filename_t;
#else
typedef char* filename_t;
#endif
// All other strings involved are UTF-8, no need to do conversion back and forth here
// So just hardcode char* as type for everything else
#ifndef AUTO3LIB
// Definitions used when building Aegisub (ie. importing the symbols)
// I believe GCC also knows about __declspec(dllimport) etc. and does something sensible with it
#define AUTO3_API __declspec(dllimport)
#else
// Otherwise we're exporting the symbols
#define AUTO3_API __declspec(dllexport)
#endif
// Stuff for configuration dialogs
enum Auto3ConfigOptionKind {
COK_INVALID = 0,
COK_LABEL, // static text
COK_TEXT, // textbox
COK_INT, // integer entry, should get spin-button is possible
COK_FLOAT, // float entry, also try for spin-button on this
COK_BOOL, // bool entry, use a checkbox
COK_COLOUR, // colour entry, use a picker if possible, otherwise text box
COK_STYLE // style name, listbox with names of styles defined in subs
};
struct Auto3ConfigOption {
char *name;
enum Auto3ConfigOptionKind kind;
char *label;
char *hint;
int hasmin : 1; // whether there is a min value
int hasmax : 1; // whether there is a max value
union {
int intval;
float floatval;
} min, max;
union {
char *stringval; // text, colour (vb-hex style-line format), style
int intval; // also bool, nonzero is true
float floatval;
} default_val, value;
};
// Describes an interpreter
struct Auto3Interpreter {
// Public attributes, treat them as read-only
filename_t filename;
char *name;
char *description;
// Configuration dialog options
// End of list marked with name==NULL
// You may change the "value" field of these (in fact, do so)
struct Auto3ConfigOption *config;
// Callback stuff
// The application should fill these with relevant stuff
// Logging and status
void *logcbdata; // pointer passed to logging/status callbacks
void (*log_error)(void *cbdata, char *msg); // log error during script execution
void (*log_message)(void *cbdata, char *msg); // log message during script execution
void (*set_progress)(void *cbdata, float progress); // set progress during script execution
void (*set_status)(void *cbdata, char* msg); // set status message during script execution
// Reading/writing subtitles and related information
void *rwcbdata; // pointer passed to read/write data callbacks
void (*get_meta_info)(void *cbdata, int *res_x, int *res_y); // application sets *res_x and *res_y to appropriate values
void (*reset_style_pointer)(void *cbdata); // set style pointer to point at first style
// Get the next style, the application must fill the data into its own buffers, which it then fill in pointers to
// When there are no more styles, set *name=NULL
void (*get_next_style)(
void *cbdata, char **name, char **fontname, int *fontsize, char **color1, char **color2, char **color3, char **color4,
int *bold, int *italic, int *underline, int *strikeout, float *scale_x, float *scale_y, float *spacing, float *angle,
int *borderstyle, float *outline, float *shadow, int *align, int *margin_l, int *margin_r, int *margin_v, int *encoding);
void (*reset_subs_pointer)(void *cbdata); // set subtitle pointer to point at first subtitle line
// Get next subtitle line, the application must fill the data into its own buffers, and then fill in pointers to those
// When there are no more lines, set *text=NULL
void (*get_next_sub)(
void *cbdata, int *layer, int *start_time, int *end_time, char **style, char **actor,
int *margin_l, int *margin_r, int *margin_v, char **effect, char **text);
void (*start_subs_write)(void *cbdata); // start writing back new subtitles, application must clear all subtitle lines and be ready to write
// Write a subtitle line back to subtitle file, char pointers are owned by the lib
void (*write_sub)(void *cbdata, int layer, int start_time, int end_time, char *style, char *actor,
int margin_l, int margin_r, int margin_v, char *effect, char *text);
#ifdef AUTO3LIB
// Private data
lua_State *L;
#endif
};
// Create a new interpreter
// Returns pointer to interpreter object if successful, otherwise NULL
// If this function fails, the error message is filled into the char* pointed to by error (may be NULL)
AUTO3_API struct Auto3Interpreter *CreateAuto3Script(filename_t filename, char **error);
// Release an interpreter
AUTO3_API void DestroyAuto3Script(struct Auto3Interpreter *script);
// Our "malloc" function, allocate memory for strings with this
AUTO3_API void *Auto3Malloc(size_t amount);
// Our "free" function, free generated error messages with this
AUTO3_API void Auto3Free(void *ptr);
// Start the script execution
// script->logcbdata and log->rwcbdata should be set to sensible values before this call.
// The value fields in the config dialog should also be set to values entered by the user here.
// This will first call get_meta_info,
// then reset_style pointer followed by a number of calls to get_next_style,
// then a call to reset_subs_pointer followed by a number of calls to get_next_sub,
// then actual processing will take place.
// After processing, start_subs_write will be called, followed by a number of calls to write_sub.
// Any number of calls to the logging/status functions can take place during script execution
AUTO3_API void RunAuto3Script(struct Auto3Interpreter *script);
#ifdef __cplusplus
}; // extern "C"
#endif

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Microsoft Visual Studio Solution File, Format Version 8.00
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "auto3", "auto3.vcproj", "{DC6DD098-5997-468E-AA4F-91AEBA5C3DD4}"
ProjectSection(ProjectDependencies) = postProject
{5C6371F1-47DD-4043-8B9F-48EA1FE73D45} = {5C6371F1-47DD-4043-8B9F-48EA1FE73D45}
EndProjectSection
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "lua", "lua\lua.vcproj", "{5C6371F1-47DD-4043-8B9F-48EA1FE73D45}"
ProjectSection(ProjectDependencies) = postProject
EndProjectSection
EndProject
Global
GlobalSection(SolutionConfiguration) = preSolution
Debug = Debug
Release = Release
EndGlobalSection
GlobalSection(ProjectConfiguration) = postSolution
{DC6DD098-5997-468E-AA4F-91AEBA5C3DD4}.Debug.ActiveCfg = Debug|Win32
{DC6DD098-5997-468E-AA4F-91AEBA5C3DD4}.Debug.Build.0 = Debug|Win32
{DC6DD098-5997-468E-AA4F-91AEBA5C3DD4}.Release.ActiveCfg = Release|Win32
{DC6DD098-5997-468E-AA4F-91AEBA5C3DD4}.Release.Build.0 = Release|Win32
{5C6371F1-47DD-4043-8B9F-48EA1FE73D45}.Debug.ActiveCfg = Debug|Win32
{5C6371F1-47DD-4043-8B9F-48EA1FE73D45}.Debug.Build.0 = Debug|Win32
{5C6371F1-47DD-4043-8B9F-48EA1FE73D45}.Release.ActiveCfg = Release|Win32
{5C6371F1-47DD-4043-8B9F-48EA1FE73D45}.Release.Build.0 = Release|Win32
EndGlobalSection
GlobalSection(ExtensibilityGlobals) = postSolution
EndGlobalSection
GlobalSection(ExtensibilityAddIns) = postSolution
EndGlobalSection
EndGlobal

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<?xml version="1.0" encoding="shift_jis"?>
<VisualStudioProject
ProjectType="Visual C++"
Version="7.10"
Name="auto3"
ProjectGUID="{DC6DD098-5997-468E-AA4F-91AEBA5C3DD4}"
Keyword="Win32Proj">
<Platforms>
<Platform
Name="Win32"/>
</Platforms>
<Configurations>
<Configuration
Name="Debug|Win32"
OutputDirectory="Debug"
IntermediateDirectory="Debug"
ConfigurationType="2"
CharacterSet="1">
<Tool
Name="VCCLCompilerTool"
Optimization="0"
AdditionalIncludeDirectories=""
PreprocessorDefinitions="WIN32;_DEBUG;_WINDOWS;AUTO3LIB;WXUSINGDLL"
MinimalRebuild="TRUE"
BasicRuntimeChecks="3"
RuntimeLibrary="1"
UsePrecompiledHeader="0"
WarningLevel="3"
Detect64BitPortabilityProblems="TRUE"
DebugInformationFormat="4"/>
<Tool
Name="VCCustomBuildTool"/>
<Tool
Name="VCLinkerTool"
AdditionalDependencies="lua/lib/luad.lib"
OutputFile="$(OutDir)/auto3.dll"
LinkIncremental="2"
GenerateDebugInformation="TRUE"
ProgramDatabaseFile="$(OutDir)/auto3.pdb"
SubSystem="2"
ImportLibrary="$(OutDir)/auto3.lib"
TargetMachine="1"/>
<Tool
Name="VCMIDLTool"/>
<Tool
Name="VCPostBuildEventTool"/>
<Tool
Name="VCPreBuildEventTool"/>
<Tool
Name="VCPreLinkEventTool"/>
<Tool
Name="VCResourceCompilerTool"/>
<Tool
Name="VCWebServiceProxyGeneratorTool"/>
<Tool
Name="VCXMLDataGeneratorTool"/>
<Tool
Name="VCWebDeploymentTool"/>
<Tool
Name="VCManagedWrapperGeneratorTool"/>
<Tool
Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
</Configuration>
<Configuration
Name="Release|Win32"
OutputDirectory="Release"
IntermediateDirectory="Release"
ConfigurationType="2"
CharacterSet="1">
<Tool
Name="VCCLCompilerTool"
AdditionalIncludeDirectories=""
PreprocessorDefinitions="WIN32;NDEBUG;_WINDOWS;AUTO3LIB;WXUSINGDLL"
RuntimeLibrary="0"
UsePrecompiledHeader="0"
WarningLevel="3"
Detect64BitPortabilityProblems="TRUE"
DebugInformationFormat="3"
CompileAs="1"/>
<Tool
Name="VCCustomBuildTool"/>
<Tool
Name="VCLinkerTool"
AdditionalDependencies="wxbase28u.lib wxbase28u_net.lib wxmsw28u_adv.lib wxmsw28u_core.lib wxmsw28u_richtext.lib wxpng.lib wxregexu.lib wxzlib.lib lua/lib/lua.lib"
ShowProgress="2"
OutputFile="$(OutDir)/auto3.dll"
LinkIncremental="1"
GenerateDebugInformation="TRUE"
SubSystem="2"
OptimizeReferences="2"
EnableCOMDATFolding="2"
ImportLibrary="$(OutDir)/auto3.lib"
TargetMachine="1"/>
<Tool
Name="VCMIDLTool"/>
<Tool
Name="VCPostBuildEventTool"/>
<Tool
Name="VCPreBuildEventTool"/>
<Tool
Name="VCPreLinkEventTool"/>
<Tool
Name="VCResourceCompilerTool"/>
<Tool
Name="VCWebServiceProxyGeneratorTool"/>
<Tool
Name="VCXMLDataGeneratorTool"/>
<Tool
Name="VCWebDeploymentTool"/>
<Tool
Name="VCManagedWrapperGeneratorTool"/>
<Tool
Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
</Configuration>
</Configurations>
<References>
</References>
<Files>
<Filter
Name="Source Files"
Filter="cpp;c;cxx;def;odl;idl;hpj;bat;asm;asmx"
UniqueIdentifier="{4FC737F1-C7A5-4376-A066-2A32D752A2FF}">
<File
RelativePath=".\auto3.c">
</File>
</Filter>
<Filter
Name="Header Files"
Filter="h;hpp;hxx;hm;inl;inc;xsd"
UniqueIdentifier="{93995380-89BD-4b04-88EB-625FBE52EBFB}">
<File
RelativePath=".\auto3.h">
</File>
</Filter>
<Filter
Name="Resource Files"
Filter="rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx"
UniqueIdentifier="{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}">
</Filter>
<File
RelativePath=".\Readme">
</File>
</Files>
<Globals>
</Globals>
</VisualStudioProject>

34
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Lua License
-----------
Lua is licensed under the terms of the MIT license reproduced below.
This means that Lua is free software and can be used for both academic
and commercial purposes at absolutely no cost.
For details and rationale, see http://www.lua.org/license.html .
===============================================================================
Copyright (C) 2003-2006 Tecgraf, PUC-Rio.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
===============================================================================
(end of COPYRIGHT)

294
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diff -r lua-5.0.2/COPYRIGHT lua-5.0.3/COPYRIGHT
12c12
< Copyright (C) 2003-2004 Tecgraf, PUC-Rio.
---
> Copyright (C) 2003-2006 Tecgraf, PUC-Rio.
diff -r lua-5.0.2/include/lua.h lua-5.0.3/include/lua.h
2c2
< ** $Id: lua.h,v 1.175b 2003/03/18 12:31:39 roberto Exp $
---
> ** $Id: lua.h,v 1.175c 2003/03/18 12:31:39 roberto Exp $
17,18c17,18
< #define LUA_VERSION "Lua 5.0.2"
< #define LUA_COPYRIGHT "Copyright (C) 1994-2004 Tecgraf, PUC-Rio"
---
> #define LUA_VERSION "Lua 5.0.3"
> #define LUA_COPYRIGHT "Copyright (C) 1994-2006 Tecgraf, PUC-Rio"
368c368
< * Copyright (C) 1994-2004 Tecgraf, PUC-Rio. All rights reserved.
---
> * Copyright (C) 1994-2006 Tecgraf, PUC-Rio. All rights reserved.
diff -r lua-5.0.2/src/lapi.c lua-5.0.3/src/lapi.c
2c2
< ** $Id: lapi.c,v 1.235 2003/04/07 14:36:08 roberto Exp $
---
> ** $Id: lapi.c,v 1.235a 2003/04/07 14:36:08 roberto Exp $
882c882
< if (n > f->c.nupvalues) return NULL;
---
> if (!(1 <= n && n <= f->c.nupvalues)) return NULL;
888c888
< if (n > p->sizeupvalues) return NULL;
---
> if (!(1 <= n && n <= p->sizeupvalues)) return NULL;
diff -r lua-5.0.2/src/lcode.c lua-5.0.3/src/lcode.c
2c2
< ** $Id: lcode.c,v 1.117 2003/04/03 13:35:34 roberto Exp $
---
> ** $Id: lcode.c,v 1.117a 2003/04/03 13:35:34 roberto Exp $
105c105,108
< if (GET_OPCODE(i) != OP_TEST || GETARG_C(i) != cond) return 1;
---
> if (GET_OPCODE(i) != OP_TEST ||
> GETARG_A(i) != NO_REG ||
> GETARG_C(i) != cond)
> return 1;
117,118c120,130
< static void luaK_patchlistaux (FuncState *fs, int list,
< int ttarget, int treg, int ftarget, int freg, int dtarget) {
---
> static void removevalues (FuncState *fs, int list) {
> for (; list != NO_JUMP; list = luaK_getjump(fs, list)) {
> Instruction *i = getjumpcontrol(fs, list);
> if (GET_OPCODE(*i) == OP_TEST)
> patchtestreg(i, NO_REG);
> }
> }
>
>
> static void luaK_patchlistaux (FuncState *fs, int list, int vtarget, int reg,
> int dtarget) {
122,136c134,136
< if (GET_OPCODE(*i) != OP_TEST) {
< lua_assert(dtarget != NO_JUMP);
< luaK_fixjump(fs, list, dtarget); /* jump to default target */
< }
< else {
< if (GETARG_C(*i)) {
< lua_assert(ttarget != NO_JUMP);
< patchtestreg(i, treg);
< luaK_fixjump(fs, list, ttarget);
< }
< else {
< lua_assert(ftarget != NO_JUMP);
< patchtestreg(i, freg);
< luaK_fixjump(fs, list, ftarget);
< }
---
> if (GET_OPCODE(*i) == OP_TEST && GETARG_A(*i) == NO_REG) {
> patchtestreg(i, reg);
> luaK_fixjump(fs, list, vtarget);
137a138,139
> else
> luaK_fixjump(fs, list, dtarget); /* jump to default target */
144c146
< luaK_patchlistaux(fs, fs->jpc, fs->pc, NO_REG, fs->pc, NO_REG, fs->pc);
---
> luaK_patchlistaux(fs, fs->jpc, fs->pc, NO_REG, fs->pc);
154c156
< luaK_patchlistaux(fs, list, target, NO_REG, target, NO_REG, target);
---
> luaK_patchlistaux(fs, list, target, NO_REG, target);
357,358c359,360
< luaK_patchlistaux(fs, e->f, p_f, NO_REG, final, reg, p_f);
< luaK_patchlistaux(fs, e->t, final, reg, p_t, NO_REG, p_t);
---
> luaK_patchlistaux(fs, e->f, final, reg, p_f);
> luaK_patchlistaux(fs, e->t, final, reg, p_t);
476c478
< return luaK_condjump(fs, OP_TEST, NO_REG, GETARG_B(ie), !cond);
---
> return luaK_condjump(fs, OP_TEST, GETARG_B(ie), GETARG_B(ie), !cond);
566a569,570
> removevalues(fs, e->f);
> removevalues(fs, e->t);
diff -r lua-5.0.2/src/lfunc.c lua-5.0.3/src/lfunc.c
2c2
< ** $Id: lfunc.c,v 1.67 2003/03/18 12:50:04 roberto Exp $
---
> ** $Id: lfunc.c,v 1.67a 2003/03/18 12:50:04 roberto Exp $
19,26d18
<
<
< #define sizeCclosure(n) (cast(int, sizeof(CClosure)) + \
< cast(int, sizeof(TObject)*((n)-1)))
<
< #define sizeLclosure(n) (cast(int, sizeof(LClosure)) + \
< cast(int, sizeof(TObject *)*((n)-1)))
<
diff -r lua-5.0.2/src/lfunc.h lua-5.0.3/src/lfunc.h
2c2
< ** $Id: lfunc.h,v 1.21 2003/03/18 12:50:04 roberto Exp $
---
> ** $Id: lfunc.h,v 1.21a 2003/03/18 12:50:04 roberto Exp $
11a12,18
>
>
> #define sizeCclosure(n) (cast(int, sizeof(CClosure)) + \
> cast(int, sizeof(TObject)*((n)-1)))
>
> #define sizeLclosure(n) (cast(int, sizeof(LClosure)) + \
> cast(int, sizeof(TObject *)*((n)-1)))
diff -r lua-5.0.2/src/lgc.c lua-5.0.3/src/lgc.c
2c2
< ** $Id: lgc.c,v 1.171a 2003/04/03 13:35:34 roberto Exp $
---
> ** $Id: lgc.c,v 1.171b 2003/04/03 13:35:34 roberto Exp $
221,224c221,222
< if (!u->marked) {
< markobject(st, &u->value);
< u->marked = 1;
< }
---
> markobject(st, u->v);
> u->marked = 1;
261c259,260
< static void propagatemarks (GCState *st) {
---
> static lu_mem propagatemarks (GCState *st) {
> lu_mem mf = 0;
267a267,268
> mf += sizeof(Table) + sizeof(TObject) * h->sizearray +
> sizeof(Node) * sizenode(h);
273a275,276
> mf += (cl->c.isC) ? sizeCclosure(cl->c.nupvalues) :
> sizeLclosure(cl->l.nupvalues);
279a283,284
> mf += sizeof(lua_State) + sizeof(TObject) * th->stacksize +
> sizeof(CallInfo) * th->size_ci;
285a291
> /* do not need 'mf' for this case (cannot happen inside a udata) */
290a297
> return mf;
371c378
< if (curr->gch.marked > limit) {
---
> if ((curr->gch.marked & ~(KEYWEAK | VALUEWEAK)) > limit) {
473c480
< propagatemarks(&st); /* remark, to propagate `preserveness' */
---
> deadmem += propagatemarks(&st); /* remark, to propagate `preserveness' */
diff -r lua-5.0.2/src/lib/lbaselib.c lua-5.0.3/src/lib/lbaselib.c
2c2
< ** $Id: lbaselib.c,v 1.130b 2003/04/03 13:35:34 roberto Exp $
---
> ** $Id: lbaselib.c,v 1.130c 2003/04/03 13:35:34 roberto Exp $
175a176
> lua_settop(L, 2);
183a185
> lua_settop(L, 3);
diff -r lua-5.0.2/src/lib/liolib.c lua-5.0.3/src/lib/liolib.c
2c2
< ** $Id: liolib.c,v 2.39a 2003/03/19 21:16:12 roberto Exp $
---
> ** $Id: liolib.c,v 2.39b 2003/03/19 21:16:12 roberto Exp $
22a23,28
> typedef struct FileHandle {
> FILE *f;
> int ispipe;
> } FileHandle;
>
>
89,92c95,98
< static FILE **topfile (lua_State *L, int findex) {
< FILE **f = (FILE **)luaL_checkudata(L, findex, FILEHANDLE);
< if (f == NULL) luaL_argerror(L, findex, "bad file");
< return f;
---
> static FileHandle *topfile (lua_State *L, int findex) {
> FileHandle *fh = (FileHandle *)luaL_checkudata(L, findex, FILEHANDLE);
> if (fh == NULL) luaL_argerror(L, findex, "bad file");
> return fh;
97,99c103,105
< FILE **f = (FILE **)luaL_checkudata(L, 1, FILEHANDLE);
< if (f == NULL) lua_pushnil(L);
< else if (*f == NULL)
---
> FileHandle *fh = (FileHandle *)luaL_checkudata(L, 1, FILEHANDLE);
> if (fh == NULL) lua_pushnil(L);
> else if (fh->f == NULL)
107,109c113,117
< static FILE *tofile (lua_State *L, int findex) {
< FILE **f = topfile(L, findex);
< if (*f == NULL)
---
> #define tofile(L,i) (tofileh(L,i)->f)
>
> static FileHandle *tofileh (lua_State *L, int findex) {
> FileHandle *fh = topfile(L, findex);
> if (fh->f == NULL)
111c119
< return *f;
---
> return fh;
115a124,125
> #define newfile(L) (&(newfileh(L)->f))
>
121,123c131,134
< static FILE **newfile (lua_State *L) {
< FILE **pf = (FILE **)lua_newuserdata(L, sizeof(FILE *));
< *pf = NULL; /* file handle is currently `closed' */
---
> static FileHandle *newfileh (lua_State *L) {
> FileHandle *fh = (FileHandle *)lua_newuserdata(L, sizeof(FileHandle));
> fh->f = NULL; /* file handle is currently `closed' */
> fh->ispipe = 0;
126c137
< return pf;
---
> return fh;
148c159,160
< FILE *f = tofile(L, 1);
---
> FileHandle *fh = tofileh(L, 1);
> FILE *f = fh->f;
152,154c164,165
< int ok = (pclose(f) != -1) || (fclose(f) == 0);
< if (ok)
< *(FILE **)lua_touserdata(L, 1) = NULL; /* mark file as closed */
---
> int ok = fh->ispipe ? (pclose(f) != -1) : (fclose(f) == 0);
> fh->f = NULL; /* mark file as closed */
170,171c181,182
< FILE **f = topfile(L, 1);
< if (*f != NULL) /* ignore closed files */
---
> FileHandle *fh = topfile(L, 1);
> if (fh->f != NULL) /* ignore closed files */
179,180c190,191
< FILE **f = topfile(L, 1);
< if (*f == NULL)
---
> FileHandle *fh = topfile(L, 1);
> if (fh->f == NULL)
205,207c216,219
< FILE **pf = newfile(L);
< *pf = popen(filename, mode);
< return (*pf == NULL) ? pushresult(L, 0, filename) : 1;
---
> FileHandle *fh = newfileh(L);
> fh->f = popen(filename, mode);
> fh->ispipe = 1;
> return (fh->f == NULL) ? pushresult(L, 0, filename) : 1;
diff -r lua-5.0.2/src/lvm.c lua-5.0.3/src/lvm.c
2c2
< ** $Id: lvm.c,v 1.284b 2003/04/03 13:35:34 roberto Exp $
---
> ** $Id: lvm.c,v 1.284c 2003/04/03 13:35:34 roberto Exp $
324,325c324
< lu_mem tl = cast(lu_mem, tsvalue(top-1)->tsv.len) +
< cast(lu_mem, tsvalue(top-2)->tsv.len);
---
> size_t tl = tsvalue(top-1)->tsv.len;
328,330c327,331
< while (n < total && tostring(L, top-n-1)) { /* collect total length */
< tl += tsvalue(top-n-1)->tsv.len;
< n++;
---
> /* collect total length */
> for (n = 1; n < total && tostring(L, top-n-1); n++) {
> size_t l = tsvalue(top-n-1)->tsv.len;
> if (l >= MAX_SIZET - tl) luaG_runerror(L, "string length overflow");
> tl += l;
332d332
< if (tl > MAX_SIZET) luaG_runerror(L, "string size overflow");

159
auto3/lua/HISTORY Normal file
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@ -0,0 +1,159 @@
This is Lua 5.0.
* Changes from version 4.0 to 5.0
-------------------------------
Language:
+ lexical scoping.
+ Lua coroutines.
+ standard libraries now packaged in tables.
+ tags replaced by metatables and tag methods replaced by metamethods,
stored in metatables.
+ proper tail calls.
+ each function can have its own global table, which can be shared.
+ new __newindex metamethod, called when we insert a new key into a table.
+ new block comments: --[[ ... ]].
+ new generic for.
+ new weak tables.
+ new boolean type.
+ new syntax "local function".
+ (f()) returns the first value returned by f.
+ {f()} fills a table with all values returned by f.
+ \n ignored in [[\n .
+ fixed and-or priorities.
+ more general syntax for function definition (e.g. function a.x.y:f()...end).
+ more general syntax for function calls (e.g. (print or write)(9)).
+ new functions (time/date, tmpfile, unpack, require, load*, etc.).
API:
+ chunks are loaded by using lua_load; new luaL_loadfile and luaL_loadbuffer.
+ introduced lightweight userdata, a simple "void*" without a metatable.
+ new error handling protocol: the core no longer prints error messages;
all errors are reported to the caller on the stack.
+ new lua_atpanic for host cleanup.
+ new, signal-safe, hook scheme.
Implementation:
+ new license: MIT.
+ new, faster, register-based virtual machine.
+ support for external multithreading and coroutines.
+ new and consistent error message format.
+ the core no longer needs "stdio.h" for anything (except for a single
use of sprintf to convert numbers to strings).
+ lua.c now runs the environment variable LUA_INIT, if present. It can
be "@filename", to run a file, or the chunk itself.
+ support for user extensions in lua.c.
sample implementation given for command line editing.
+ new dynamic loading library, active by default on several platforms.
+ safe garbage-collector metamethods.
+ precompiled bytecodes checked for integrity (secure binary dostring).
+ strings are fully aligned.
+ position capture in string.find.
+ read('*l') can read lines with embedded zeros.
* Changes from version 3.2 to 4.0
-------------------------------
Language:
+ new "break" and "for" statements (both numerical and for tables).
+ uniform treatment of globals: globals are now stored in a Lua table.
+ improved error messages.
+ no more '$debug': full speed *and* full debug information.
+ new read form: read(N) for next N bytes.
+ general read patterns now deprecated.
(still available with -DCOMPAT_READPATTERNS.)
+ all return values are passed as arguments for the last function
(old semantics still available with -DLUA_COMPAT_ARGRET)
+ garbage collection tag methods for tables now deprecated.
+ there is now only one tag method for order.
API:
+ New API: fully re-entrant, simpler, and more efficient.
+ New debug API.
Implementation:
+ faster than ever: cleaner virtual machine and new hashing algorithm.
+ non-recursive garbage-collector algorithm.
+ reduced memory usage for programs with many strings.
+ improved treatment for memory allocation errors.
+ improved support for 16-bit machines (we hope).
+ code now compiles unmodified as both ANSI C and C++.
+ numbers in bases other than 10 are converted using strtoul.
+ new -f option in Lua to support #! scripts.
+ luac can now combine text and binaries.
* Changes from version 3.1 to 3.2
-------------------------------
+ redirected all output in Lua's core to _ERRORMESSAGE and _ALERT.
+ increased limit on the number of constants and globals per function
(from 2^16 to 2^24).
+ debugging info (lua_debug and hooks) moved into lua_state and new API
functions provided to get and set this info.
+ new debug lib gives full debugging access within Lua.
+ new table functions "foreachi", "sort", "tinsert", "tremove", "getn".
+ new io functions "flush", "seek".
* Changes from version 3.0 to 3.1
-------------------------------
+ NEW FEATURE: anonymous functions with closures (via "upvalues").
+ new syntax:
- local variables in chunks.
- better scope control with DO block END.
- constructors can now be also written: { record-part; list-part }.
- more general syntax for function calls and lvalues, e.g.:
f(x).y=1
o:f(x,y):g(z)
f"string" is sugar for f("string")
+ strings may now contain arbitrary binary data (e.g., embedded zeros).
+ major code re-organization and clean-up; reduced module interdependecies.
+ no arbitrary limits on the total number of constants and globals.
+ support for multiple global contexts.
+ better syntax error messages.
+ new traversal functions "foreach" and "foreachvar".
+ the default for numbers is now double.
changing it to use floats or longs is easy.
+ complete debug information stored in pre-compiled chunks.
+ sample interpreter now prompts user when run interactively, and also
handles control-C interruptions gracefully.
* Changes from version 2.5 to 3.0
-------------------------------
+ NEW CONCEPT: "tag methods".
Tag methods replace fallbacks as the meta-mechanism for extending the
semantics of Lua. Whereas fallbacks had a global nature, tag methods
work on objects having the same tag (e.g., groups of tables).
Existing code that uses fallbacks should work without change.
+ new, general syntax for constructors {[exp] = exp, ... }.
+ support for handling variable number of arguments in functions (varargs).
+ support for conditional compilation ($if ... $else ... $end).
+ cleaner semantics in API simplifies host code.
+ better support for writing libraries (auxlib.h).
+ better type checking and error messages in the standard library.
+ luac can now also undump.
* Changes from version 2.4 to 2.5
-------------------------------
+ io and string libraries are now based on pattern matching;
the old libraries are still available for compatibility
+ dofile and dostring can now return values (via return statement)
+ better support for 16- and 64-bit machines
+ expanded documentation, with more examples
* Changes from version 2.2 to 2.4
-------------------------------
+ external compiler creates portable binary files that can be loaded faster
+ interface for debugging and profiling
+ new "getglobal" fallback
+ new functions for handling references to Lua objects
+ new functions in standard lib
+ only one copy of each string is stored
+ expanded documentation, with more examples
* Changes from version 2.1 to 2.2
-------------------------------
+ functions now may be declared with any "lvalue" as a name
+ garbage collection of functions
+ support for pipes
* Changes from version 1.1 to 2.1
-------------------------------
+ object-oriented support
+ fallbacks
+ simplified syntax for tables
+ many internal improvements
(end of HISTORY)

44
auto3/lua/README Normal file
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This is Lua 5.0.
See HISTORY for a summary of changes since the last released version.
* What is Lua?
------------
Lua is a powerful, light-weight programming language designed for extending
applications. Lua is also frequently used as a general-purpose, stand-alone
language. Lua is free software.
For complete information, visit Lua's web site at http://www.lua.org/ .
For an executive summary, see http://www.lua.org/about.html .
Lua has been used in many different projects around the world.
For a short list, see http://www.lua.org/uses.html .
* Availability
------------
Lua is freely available for both academic and commercial purposes.
See COPYRIGHT and http://www.lua.org/license.html for details.
Lua can be downloaded from its official site http://www.lua.org/ and
several other sites aroung the world. For a complete list of mirror sites,
see http://www.lua.org/mirrors.html .
* Installation
------------
Lua is implemented in pure ANSI C, and compiles unmodified in all known
platforms that have an ANSI C compiler. Under Unix, simply typing "make"
should work. See INSTALL for detailed instructions.
* Contacting the authors
----------------------
Send your comments, questions, and bug reports to lua@tecgraf.puc-rio.br.
For more information about the authors, see http://www.lua.org/authors.html .
For reporting bugs, try also the mailing list: lua-l@tecgraf.puc-rio.br.
For more information about this list, including instructions on how to
subscribe and access the archives, see http://www.lua.org/lua-l.html .
* Origin
------
Lua is developed at Tecgraf, the Computer Graphics Technology Group
of PUC-Rio (the Pontifical Catholic University of Rio de Janeiro in Brazil).
Tecgraf is a laboratory of the Department of Computer Science.
(end of README)

17
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This directory contains a stripped-down version of the Lua 5.0.3 source.
Nothing has changed in functionality, just some files not needed for Auto3
have been removed.
When building the Auto3 shared library, you are encouraged to use this version
of Lua. While it's unlikely, it might get some Auto3-specific patches in the
future.
Be sure to build this as a static library for linking into the Auto3 shared
library. While lualib is usually meant to be built as a separate library,
there is no need to do that, and it slightly simplifies things if it's built
right into the main library.
Remember to use MSVC 2003 .NET (MSVC 7.1) on Windows!
TODO:
- Write new Makefile for non-MSVC systems

23
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This is Lua 5.0.2, an update of Lua 5.0 that includes the following changes,
which fix all known bugs in Lua 5.0. For the exact differences, see DIFFS.
src/ldo.c
Attempt to resume running coroutine crashed Lua
src/lgc.c
C functions also may have stacks larger than current top
Userdata to be collected still counted into new GC threshold
src/lgc.h
Userdata to be collected still counted into new GC threshold
src/lparser.c
Syntax `local function' did not increment stack size
src/lvm.c
`pc' address was invalidated when a coroutine was suspended
Count hook might be called without being set
src/lib/lbaselib.c
Buffer overflow for unusual %p representation
Wrong number of returns from chunks loaded from stdin
src/lib/liolib.c
`file.close()' could not be called without arguments
Buffer overflow for unusual %p representation
src/luac/luac.c
Missing lock/unlock

123
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<HTML>
<HEAD>
<TITLE>Lua: 5.0 reference manual - contents</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF">
<HR>
<H1>
<A HREF="http://www.lua.org/home.html"><IMG SRC="logo.gif" ALT="Lua" BORDER=0></A>
Reference manual for Lua 5.0
</H1>
<A HREF="manual.html">Lua 5.0 Reference Manual</A>
[
<A HREF="manual.html">top</A>
|
<A HREF="http://www.lua.org/ftp/refman-5.0.ps.gz">ps</A>
|
<A HREF="http://www.lua.org/ftp/refman-5.0.pdf">pdf</A>
]
<P>
<SMALL>
<A HREF="http://www.lua.org/copyright.html">Copyright</A>
&copy; 2003 Tecgraf, PUC-Rio. All rights reserved.</SMALL>
<HR>
<UL>
<LI><A HREF="manual.html#1">1 - Introduction</A>
<LI><A HREF="manual.html#2">2 - The Language</A>
<UL>
<LI><A HREF="manual.html#2.1">2.1 - Lexical Conventions</A>
<LI><A HREF="manual.html#2.2">2.2 - Values and Types</A>
<UL>
<LI><A HREF="manual.html#2.2.1">2.2.1 - Coercion</A>
</UL>
<LI><A HREF="manual.html#2.3">2.3 - Variables</A>
<LI><A HREF="manual.html#2.4">2.4 - Statements</A>
<UL>
<LI><A HREF="manual.html#2.4.1">2.4.1 - Chunks</A>
<LI><A HREF="manual.html#2.4.2">2.4.2 - Blocks</A>
<LI><A HREF="manual.html#2.4.3">2.4.3 - Assignment</A>
<LI><A HREF="manual.html#2.4.4">2.4.4 - Control Structures</A>
<LI><A HREF="manual.html#2.4.5">2.4.5 - For Statement</A>
<LI><A HREF="manual.html#2.4.6">2.4.6 - Function Calls as Statements</A>
<LI><A HREF="manual.html#2.4.7">2.4.7 - Local Declarations</A>
</UL>
<LI><A HREF="manual.html#2.5">2.5 - Expressions</A>
<UL>
<LI><A HREF="manual.html#2.5.1">2.5.1 - Arithmetic Operators</A>
<LI><A HREF="manual.html#2.5.2">2.5.2 - Relational Operators</A>
<LI><A HREF="manual.html#2.5.3">2.5.3 - Logical Operators</A>
<LI><A HREF="manual.html#2.5.4">2.5.4 - Concatenation</A>
<LI><A HREF="manual.html#2.5.5">2.5.5 - Precedence</A>
<LI><A HREF="manual.html#2.5.6">2.5.6 - Table Constructors</A>
<LI><A HREF="manual.html#2.5.7">2.5.7 - Function Calls</A>
<LI><A HREF="manual.html#2.5.8">2.5.8 - Function Definitions</A>
</UL>
</UL>
<UL>
<LI><A HREF="manual.html#2.6">2.6 - Visibility Rules</A>
<LI><A HREF="manual.html#2.7">2.7 - Error Handling</A>
<LI><A HREF="manual.html#2.8">2.8 - Metatables</A>
<LI><A HREF="manual.html#2.9">2.9 - Garbage Collection</A>
<UL>
<LI><A HREF="manual.html#2.9.1">2.9.1 - Garbage-Collection Metamethods</A>
<LI><A HREF="manual.html#2.9.2">2.9.2 - Weak Tables</A>
</UL>
<LI><A HREF="manual.html#2.10">2.10 - Coroutines</A>
</UL>
<LI><A HREF="manual.html#3">3 - The Application Program Interface</A>
<UL>
<LI><A HREF="manual.html#3.1">3.1 - States</A>
<LI><A HREF="manual.html#3.2">3.2 - The Stack and Indices</A>
<LI><A HREF="manual.html#3.3">3.3 - Stack Manipulation</A>
<LI><A HREF="manual.html#3.4">3.4 - Querying the Stack</A>
<LI><A HREF="manual.html#3.5">3.5 - Getting Values from the Stack</A>
<LI><A HREF="manual.html#3.6">3.6 - Pushing Values onto the Stack</A>
<LI><A HREF="manual.html#3.7">3.7 - Controlling Garbage Collection</A>
<LI><A HREF="manual.html#3.8">3.8 - Userdata</A>
<LI><A HREF="manual.html#3.9">3.9 - Metatables</A>
<LI><A HREF="manual.html#3.10">3.10 - Loading Lua Chunks</A>
<LI><A HREF="manual.html#3.11">3.11 - Manipulating Tables</A>
<LI><A HREF="manual.html#3.12">3.12 - Manipulating Environments</A>
<LI><A HREF="manual.html#3.13">3.13 - Using Tables as Arrays</A>
<LI><A HREF="manual.html#3.14">3.14 - Calling Functions</A>
<LI><A HREF="manual.html#3.15">3.15 - Protected Calls</A>
<LI><A HREF="manual.html#3.16">3.16 - Defining C Functions</A>
<LI><A HREF="manual.html#3.17">3.17 - Defining C Closures</A>
<LI><A HREF="manual.html#3.18">3.18 - Registry</A>
<LI><A HREF="manual.html#3.19">3.19 - Error Handling in C</A>
<LI><A HREF="manual.html#3.20">3.20 - Threads</A>
</UL>
<LI><A HREF="manual.html#4">4 - The Debug Interface</A>
<UL>
<LI><A HREF="manual.html#4.1">4.1 - Stack and Function Information</A>
<LI><A HREF="manual.html#4.2">4.2 - Manipulating Local Variables and Upvalues</A>
<LI><A HREF="manual.html#4.3">4.3 - Hooks</A>
</UL>
<LI><A HREF="manual.html#5">5 - Standard Libraries</A>
<UL>
<LI><A HREF="manual.html#5.1">5.1 - Basic Functions</A>
<LI><A HREF="manual.html#5.2">5.2 - Coroutine Manipulation</A>
<LI><A HREF="manual.html#5.3">5.3 - String Manipulation</A>
<LI><A HREF="manual.html#5.4">5.4 - Table Manipulation</A>
<LI><A HREF="manual.html#5.5">5.5 - Mathematical Functions</A>
<LI><A HREF="manual.html#5.6">5.6 - Input and Output Facilities</A>
<LI><A HREF="manual.html#5.7">5.7 - Operating System Facilities</A>
<LI><A HREF="manual.html#5.8">5.8 - The Reflexive Debug Interface</A>
</UL>
<LI><A HREF="manual.html#6">6 - Lua Stand-alone</A>
<LI><A HREF="manual.html#BNF">The Complete Syntax of Lua</A>
</UL>
<HR>
<SMALL>
Last update:
Wed May 7 18:34:34 EST 2003
</SMALL>
</BODY>
</HTML>

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<HTML>
<HEAD>
<TITLE>Lua documentation</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF">
<HR>
<H1>
<A HREF="http://www.lua.org/"><IMG SRC="logo.gif" ALT="Lua" BORDER=0></A>
Documentation
</H1>
<UL>
<LI><A HREF="http://www.lua.org/">Official web site</A>
<LI><A HREF="contents.html">Reference manual</A>
<LI><A HREF="lua.html">lua man page</A>
<LI><A HREF="luac.html">luac man page</A>
<LI><A HREF="../README">lua/README</A>
<LI><A HREF="../src/README">lua/src/README</A>
<LI><A HREF="../src/lib/README">lua/src/lib/README</A>
<LI><A HREF="../src/lua/README">lua/src/lua/README</A>
<LI><A HREF="../src/luac/README">lua/src/luac/README</A>
<LI><A HREF="../etc/README">lua/etc/README</A>
<LI><A HREF="../test/README">lua/test/README</A>
</UL>
<HR>
<SMALL>
Last update:
Thu Mar 11 23:08:56 BRT 2004
</SMALL>
</BODY>
</HTML>

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/*
** $Id: lauxlib.h,v 1.60 2003/04/03 13:35:34 roberto Exp $
** Auxiliary functions for building Lua libraries
** See Copyright Notice in lua.h
*/
#ifndef lauxlib_h
#define lauxlib_h
#include <stddef.h>
#include <stdio.h>
#include "lua.h"
#ifndef LUALIB_API
#define LUALIB_API LUA_API
#endif
typedef struct luaL_reg {
const char *name;
lua_CFunction func;
} luaL_reg;
LUALIB_API void luaL_openlib (lua_State *L, const char *libname,
const luaL_reg *l, int nup);
LUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *e);
LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *e);
LUALIB_API int luaL_typerror (lua_State *L, int narg, const char *tname);
LUALIB_API int luaL_argerror (lua_State *L, int numarg, const char *extramsg);
LUALIB_API const char *luaL_checklstring (lua_State *L, int numArg, size_t *l);
LUALIB_API const char *luaL_optlstring (lua_State *L, int numArg,
const char *def, size_t *l);
LUALIB_API lua_Number luaL_checknumber (lua_State *L, int numArg);
LUALIB_API lua_Number luaL_optnumber (lua_State *L, int nArg, lua_Number def);
LUALIB_API void luaL_checkstack (lua_State *L, int sz, const char *msg);
LUALIB_API void luaL_checktype (lua_State *L, int narg, int t);
LUALIB_API void luaL_checkany (lua_State *L, int narg);
LUALIB_API int luaL_newmetatable (lua_State *L, const char *tname);
LUALIB_API void luaL_getmetatable (lua_State *L, const char *tname);
LUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname);
LUALIB_API void luaL_where (lua_State *L, int lvl);
LUALIB_API int luaL_error (lua_State *L, const char *fmt, ...);
LUALIB_API int luaL_findstring (const char *st, const char *const lst[]);
LUALIB_API int luaL_ref (lua_State *L, int t);
LUALIB_API void luaL_unref (lua_State *L, int t, int ref);
LUALIB_API int luaL_getn (lua_State *L, int t);
LUALIB_API void luaL_setn (lua_State *L, int t, int n);
LUALIB_API int luaL_loadfile (lua_State *L, const char *filename);
LUALIB_API int luaL_loadbuffer (lua_State *L, const char *buff, size_t sz,
const char *name);
/*
** ===============================================================
** some useful macros
** ===============================================================
*/
#define luaL_argcheck(L, cond,numarg,extramsg) if (!(cond)) \
luaL_argerror(L, numarg,extramsg)
#define luaL_checkstring(L,n) (luaL_checklstring(L, (n), NULL))
#define luaL_optstring(L,n,d) (luaL_optlstring(L, (n), (d), NULL))
#define luaL_checkint(L,n) ((int)luaL_checknumber(L, n))
#define luaL_checklong(L,n) ((long)luaL_checknumber(L, n))
#define luaL_optint(L,n,d) ((int)luaL_optnumber(L, n,(lua_Number)(d)))
#define luaL_optlong(L,n,d) ((long)luaL_optnumber(L, n,(lua_Number)(d)))
/*
** {======================================================
** Generic Buffer manipulation
** =======================================================
*/
#ifndef LUAL_BUFFERSIZE
#define LUAL_BUFFERSIZE BUFSIZ
#endif
typedef struct luaL_Buffer {
char *p; /* current position in buffer */
int lvl; /* number of strings in the stack (level) */
lua_State *L;
char buffer[LUAL_BUFFERSIZE];
} luaL_Buffer;
#define luaL_putchar(B,c) \
((void)((B)->p < ((B)->buffer+LUAL_BUFFERSIZE) || luaL_prepbuffer(B)), \
(*(B)->p++ = (char)(c)))
#define luaL_addsize(B,n) ((B)->p += (n))
LUALIB_API void luaL_buffinit (lua_State *L, luaL_Buffer *B);
LUALIB_API char *luaL_prepbuffer (luaL_Buffer *B);
LUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l);
LUALIB_API void luaL_addstring (luaL_Buffer *B, const char *s);
LUALIB_API void luaL_addvalue (luaL_Buffer *B);
LUALIB_API void luaL_pushresult (luaL_Buffer *B);
/* }====================================================== */
/*
** Compatibility macros and functions
*/
LUALIB_API int lua_dofile (lua_State *L, const char *filename);
LUALIB_API int lua_dostring (lua_State *L, const char *str);
LUALIB_API int lua_dobuffer (lua_State *L, const char *buff, size_t sz,
const char *n);
#define luaL_check_lstr luaL_checklstring
#define luaL_opt_lstr luaL_optlstring
#define luaL_check_number luaL_checknumber
#define luaL_opt_number luaL_optnumber
#define luaL_arg_check luaL_argcheck
#define luaL_check_string luaL_checkstring
#define luaL_opt_string luaL_optstring
#define luaL_check_int luaL_checkint
#define luaL_check_long luaL_checklong
#define luaL_opt_int luaL_optint
#define luaL_opt_long luaL_optlong
#endif

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@ -0,0 +1,391 @@
/*
** $Id: lua.h,v 1.175c 2003/03/18 12:31:39 roberto Exp $
** Lua - An Extensible Extension Language
** Tecgraf: Computer Graphics Technology Group, PUC-Rio, Brazil
** http://www.lua.org mailto:info@lua.org
** See Copyright Notice at the end of this file
*/
#ifndef lua_h
#define lua_h
#include <stdarg.h>
#include <stddef.h>
#define LUA_VERSION "Lua 5.0.3"
#define LUA_COPYRIGHT "Copyright (C) 1994-2006 Tecgraf, PUC-Rio"
#define LUA_AUTHORS "R. Ierusalimschy, L. H. de Figueiredo & W. Celes"
/* option for multiple returns in `lua_pcall' and `lua_call' */
#define LUA_MULTRET (-1)
/*
** pseudo-indices
*/
#define LUA_REGISTRYINDEX (-10000)
#define LUA_GLOBALSINDEX (-10001)
#define lua_upvalueindex(i) (LUA_GLOBALSINDEX-(i))
/* error codes for `lua_load' and `lua_pcall' */
#define LUA_ERRRUN 1
#define LUA_ERRFILE 2
#define LUA_ERRSYNTAX 3
#define LUA_ERRMEM 4
#define LUA_ERRERR 5
typedef struct lua_State lua_State;
typedef int (*lua_CFunction) (lua_State *L);
/*
** functions that read/write blocks when loading/dumping Lua chunks
*/
typedef const char * (*lua_Chunkreader) (lua_State *L, void *ud, size_t *sz);
typedef int (*lua_Chunkwriter) (lua_State *L, const void* p,
size_t sz, void* ud);
/*
** basic types
*/
#define LUA_TNONE (-1)
#define LUA_TNIL 0
#define LUA_TBOOLEAN 1
#define LUA_TLIGHTUSERDATA 2
#define LUA_TNUMBER 3
#define LUA_TSTRING 4
#define LUA_TTABLE 5
#define LUA_TFUNCTION 6
#define LUA_TUSERDATA 7
#define LUA_TTHREAD 8
/* minimum Lua stack available to a C function */
#define LUA_MINSTACK 20
/*
** generic extra include file
*/
#ifdef LUA_USER_H
#include LUA_USER_H
#endif
/* type of numbers in Lua */
#ifndef LUA_NUMBER
typedef double lua_Number;
#else
typedef LUA_NUMBER lua_Number;
#endif
/* mark for all API functions */
#ifndef LUA_API
#define LUA_API extern
#endif
/*
** state manipulation
*/
LUA_API lua_State *lua_open (void);
LUA_API void lua_close (lua_State *L);
LUA_API lua_State *lua_newthread (lua_State *L);
LUA_API lua_CFunction lua_atpanic (lua_State *L, lua_CFunction panicf);
/*
** basic stack manipulation
*/
LUA_API int lua_gettop (lua_State *L);
LUA_API void lua_settop (lua_State *L, int idx);
LUA_API void lua_pushvalue (lua_State *L, int idx);
LUA_API void lua_remove (lua_State *L, int idx);
LUA_API void lua_insert (lua_State *L, int idx);
LUA_API void lua_replace (lua_State *L, int idx);
LUA_API int lua_checkstack (lua_State *L, int sz);
LUA_API void lua_xmove (lua_State *from, lua_State *to, int n);
/*
** access functions (stack -> C)
*/
LUA_API int lua_isnumber (lua_State *L, int idx);
LUA_API int lua_isstring (lua_State *L, int idx);
LUA_API int lua_iscfunction (lua_State *L, int idx);
LUA_API int lua_isuserdata (lua_State *L, int idx);
LUA_API int lua_type (lua_State *L, int idx);
LUA_API const char *lua_typename (lua_State *L, int tp);
LUA_API int lua_equal (lua_State *L, int idx1, int idx2);
LUA_API int lua_rawequal (lua_State *L, int idx1, int idx2);
LUA_API int lua_lessthan (lua_State *L, int idx1, int idx2);
LUA_API lua_Number lua_tonumber (lua_State *L, int idx);
LUA_API int lua_toboolean (lua_State *L, int idx);
LUA_API const char *lua_tostring (lua_State *L, int idx);
LUA_API size_t lua_strlen (lua_State *L, int idx);
LUA_API lua_CFunction lua_tocfunction (lua_State *L, int idx);
LUA_API void *lua_touserdata (lua_State *L, int idx);
LUA_API lua_State *lua_tothread (lua_State *L, int idx);
LUA_API const void *lua_topointer (lua_State *L, int idx);
/*
** push functions (C -> stack)
*/
LUA_API void lua_pushnil (lua_State *L);
LUA_API void lua_pushnumber (lua_State *L, lua_Number n);
LUA_API void lua_pushlstring (lua_State *L, const char *s, size_t l);
LUA_API void lua_pushstring (lua_State *L, const char *s);
LUA_API const char *lua_pushvfstring (lua_State *L, const char *fmt,
va_list argp);
LUA_API const char *lua_pushfstring (lua_State *L, const char *fmt, ...);
LUA_API void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n);
LUA_API void lua_pushboolean (lua_State *L, int b);
LUA_API void lua_pushlightuserdata (lua_State *L, void *p);
/*
** get functions (Lua -> stack)
*/
LUA_API void lua_gettable (lua_State *L, int idx);
LUA_API void lua_rawget (lua_State *L, int idx);
LUA_API void lua_rawgeti (lua_State *L, int idx, int n);
LUA_API void lua_newtable (lua_State *L);
LUA_API void *lua_newuserdata (lua_State *L, size_t sz);
LUA_API int lua_getmetatable (lua_State *L, int objindex);
LUA_API void lua_getfenv (lua_State *L, int idx);
/*
** set functions (stack -> Lua)
*/
LUA_API void lua_settable (lua_State *L, int idx);
LUA_API void lua_rawset (lua_State *L, int idx);
LUA_API void lua_rawseti (lua_State *L, int idx, int n);
LUA_API int lua_setmetatable (lua_State *L, int objindex);
LUA_API int lua_setfenv (lua_State *L, int idx);
/*
** `load' and `call' functions (load and run Lua code)
*/
LUA_API void lua_call (lua_State *L, int nargs, int nresults);
LUA_API int lua_pcall (lua_State *L, int nargs, int nresults, int errfunc);
LUA_API int lua_cpcall (lua_State *L, lua_CFunction func, void *ud);
LUA_API int lua_load (lua_State *L, lua_Chunkreader reader, void *dt,
const char *chunkname);
LUA_API int lua_dump (lua_State *L, lua_Chunkwriter writer, void *data);
/*
** coroutine functions
*/
LUA_API int lua_yield (lua_State *L, int nresults);
LUA_API int lua_resume (lua_State *L, int narg);
/*
** garbage-collection functions
*/
LUA_API int lua_getgcthreshold (lua_State *L);
LUA_API int lua_getgccount (lua_State *L);
LUA_API void lua_setgcthreshold (lua_State *L, int newthreshold);
/*
** miscellaneous functions
*/
LUA_API const char *lua_version (void);
LUA_API int lua_error (lua_State *L);
LUA_API int lua_next (lua_State *L, int idx);
LUA_API void lua_concat (lua_State *L, int n);
/*
** ===============================================================
** some useful macros
** ===============================================================
*/
#define lua_boxpointer(L,u) \
(*(void **)(lua_newuserdata(L, sizeof(void *))) = (u))
#define lua_unboxpointer(L,i) (*(void **)(lua_touserdata(L, i)))
#define lua_pop(L,n) lua_settop(L, -(n)-1)
#define lua_register(L,n,f) \
(lua_pushstring(L, n), \
lua_pushcfunction(L, f), \
lua_settable(L, LUA_GLOBALSINDEX))
#define lua_pushcfunction(L,f) lua_pushcclosure(L, f, 0)
#define lua_isfunction(L,n) (lua_type(L,n) == LUA_TFUNCTION)
#define lua_istable(L,n) (lua_type(L,n) == LUA_TTABLE)
#define lua_islightuserdata(L,n) (lua_type(L,n) == LUA_TLIGHTUSERDATA)
#define lua_isnil(L,n) (lua_type(L,n) == LUA_TNIL)
#define lua_isboolean(L,n) (lua_type(L,n) == LUA_TBOOLEAN)
#define lua_isnone(L,n) (lua_type(L,n) == LUA_TNONE)
#define lua_isnoneornil(L, n) (lua_type(L,n) <= 0)
#define lua_pushliteral(L, s) \
lua_pushlstring(L, "" s, (sizeof(s)/sizeof(char))-1)
/*
** compatibility macros and functions
*/
LUA_API int lua_pushupvalues (lua_State *L);
#define lua_getregistry(L) lua_pushvalue(L, LUA_REGISTRYINDEX)
#define lua_setglobal(L,s) \
(lua_pushstring(L, s), lua_insert(L, -2), lua_settable(L, LUA_GLOBALSINDEX))
#define lua_getglobal(L,s) \
(lua_pushstring(L, s), lua_gettable(L, LUA_GLOBALSINDEX))
/* compatibility with ref system */
/* pre-defined references */
#define LUA_NOREF (-2)
#define LUA_REFNIL (-1)
#define lua_ref(L,lock) ((lock) ? luaL_ref(L, LUA_REGISTRYINDEX) : \
(lua_pushstring(L, "unlocked references are obsolete"), lua_error(L), 0))
#define lua_unref(L,ref) luaL_unref(L, LUA_REGISTRYINDEX, (ref))
#define lua_getref(L,ref) lua_rawgeti(L, LUA_REGISTRYINDEX, ref)
/*
** {======================================================================
** useful definitions for Lua kernel and libraries
** =======================================================================
*/
/* formats for Lua numbers */
#ifndef LUA_NUMBER_SCAN
#define LUA_NUMBER_SCAN "%lf"
#endif
#ifndef LUA_NUMBER_FMT
#define LUA_NUMBER_FMT "%.14g"
#endif
/* }====================================================================== */
/*
** {======================================================================
** Debug API
** =======================================================================
*/
/*
** Event codes
*/
#define LUA_HOOKCALL 0
#define LUA_HOOKRET 1
#define LUA_HOOKLINE 2
#define LUA_HOOKCOUNT 3
#define LUA_HOOKTAILRET 4
/*
** Event masks
*/
#define LUA_MASKCALL (1 << LUA_HOOKCALL)
#define LUA_MASKRET (1 << LUA_HOOKRET)
#define LUA_MASKLINE (1 << LUA_HOOKLINE)
#define LUA_MASKCOUNT (1 << LUA_HOOKCOUNT)
typedef struct lua_Debug lua_Debug; /* activation record */
typedef void (*lua_Hook) (lua_State *L, lua_Debug *ar);
LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar);
LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar);
LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n);
LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n);
LUA_API const char *lua_getupvalue (lua_State *L, int funcindex, int n);
LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n);
LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count);
LUA_API lua_Hook lua_gethook (lua_State *L);
LUA_API int lua_gethookmask (lua_State *L);
LUA_API int lua_gethookcount (lua_State *L);
#define LUA_IDSIZE 60
struct lua_Debug {
int event;
const char *name; /* (n) */
const char *namewhat; /* (n) `global', `local', `field', `method' */
const char *what; /* (S) `Lua', `C', `main', `tail' */
const char *source; /* (S) */
int currentline; /* (l) */
int nups; /* (u) number of upvalues */
int linedefined; /* (S) */
char short_src[LUA_IDSIZE]; /* (S) */
/* private part */
int i_ci; /* active function */
};
/* }====================================================================== */
/******************************************************************************
* Copyright (C) 1994-2006 Tecgraf, PUC-Rio. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
******************************************************************************/
#endif

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auto3/lua/include/lualib.h Normal file
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/*
** $Id: lualib.h,v 1.28 2003/03/18 12:24:26 roberto Exp $
** Lua standard libraries
** See Copyright Notice in lua.h
*/
#ifndef lualib_h
#define lualib_h
#include "lua.h"
#ifndef LUALIB_API
#define LUALIB_API LUA_API
#endif
#define LUA_COLIBNAME "coroutine"
LUALIB_API int luaopen_base (lua_State *L);
#define LUA_TABLIBNAME "table"
LUALIB_API int luaopen_table (lua_State *L);
#define LUA_IOLIBNAME "io"
#define LUA_OSLIBNAME "os"
LUALIB_API int luaopen_io (lua_State *L);
#define LUA_STRLIBNAME "string"
LUALIB_API int luaopen_string (lua_State *L);
#define LUA_MATHLIBNAME "math"
LUALIB_API int luaopen_math (lua_State *L);
#define LUA_DBLIBNAME "debug"
LUALIB_API int luaopen_debug (lua_State *L);
LUALIB_API int luaopen_loadlib (lua_State *L);
/* to help testing the libraries */
#ifndef lua_assert
#define lua_assert(c) /* empty */
#endif
/* compatibility code */
#define lua_baselibopen luaopen_base
#define lua_tablibopen luaopen_table
#define lua_iolibopen luaopen_io
#define lua_strlibopen luaopen_string
#define lua_mathlibopen luaopen_math
#define lua_dblibopen luaopen_debug
#endif

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auto3/lua/lua.vcproj Normal file
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<?xml version="1.0" encoding="shift_jis"?>
<VisualStudioProject
ProjectType="Visual C++"
Version="7.10"
Name="lua"
ProjectGUID="{5C6371F1-47DD-4043-8B9F-48EA1FE73D45}"
Keyword="Win32Proj">
<Platforms>
<Platform
Name="Win32"/>
</Platforms>
<Configurations>
<Configuration
Name="Debug|Win32"
OutputDirectory="Debug"
IntermediateDirectory="Debug"
ConfigurationType="4"
CharacterSet="2">
<Tool
Name="VCCLCompilerTool"
Optimization="0"
AdditionalIncludeDirectories="include"
PreprocessorDefinitions="WIN32;_DEBUG;_LIB"
MinimalRebuild="TRUE"
BasicRuntimeChecks="3"
RuntimeLibrary="1"
UsePrecompiledHeader="0"
WarningLevel="3"
Detect64BitPortabilityProblems="TRUE"
DebugInformationFormat="4"/>
<Tool
Name="VCCustomBuildTool"/>
<Tool
Name="VCLibrarianTool"
OutputFile="lib/luad.lib"/>
<Tool
Name="VCMIDLTool"/>
<Tool
Name="VCPostBuildEventTool"/>
<Tool
Name="VCPreBuildEventTool"/>
<Tool
Name="VCPreLinkEventTool"/>
<Tool
Name="VCResourceCompilerTool"/>
<Tool
Name="VCWebServiceProxyGeneratorTool"/>
<Tool
Name="VCXMLDataGeneratorTool"/>
<Tool
Name="VCManagedWrapperGeneratorTool"/>
<Tool
Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
</Configuration>
<Configuration
Name="Release|Win32"
OutputDirectory="Release"
IntermediateDirectory="Release"
ConfigurationType="4"
CharacterSet="2">
<Tool
Name="VCCLCompilerTool"
AdditionalIncludeDirectories="include"
PreprocessorDefinitions="WIN32;NDEBUG;_LIB"
RuntimeLibrary="0"
UsePrecompiledHeader="0"
WarningLevel="3"
Detect64BitPortabilityProblems="TRUE"
DebugInformationFormat="3"/>
<Tool
Name="VCCustomBuildTool"/>
<Tool
Name="VCLibrarianTool"
OutputFile="lib/lua.lib"/>
<Tool
Name="VCMIDLTool"/>
<Tool
Name="VCPostBuildEventTool"/>
<Tool
Name="VCPreBuildEventTool"/>
<Tool
Name="VCPreLinkEventTool"/>
<Tool
Name="VCResourceCompilerTool"/>
<Tool
Name="VCWebServiceProxyGeneratorTool"/>
<Tool
Name="VCXMLDataGeneratorTool"/>
<Tool
Name="VCManagedWrapperGeneratorTool"/>
<Tool
Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
</Configuration>
</Configurations>
<References>
</References>
<Files>
<Filter
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auto3/lua/src/lapi.c Normal file
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/*
** $Id: lapi.c,v 1.235a 2003/04/07 14:36:08 roberto Exp $
** Lua API
** See Copyright Notice in lua.h
*/
#include <assert.h>
#include <string.h>
#define lapi_c
#include "lua.h"
#include "lapi.h"
#include "ldebug.h"
#include "ldo.h"
#include "lfunc.h"
#include "lgc.h"
#include "lmem.h"
#include "lobject.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "ltm.h"
#include "lundump.h"
#include "lvm.h"
const char lua_ident[] =
"$Lua: " LUA_VERSION " " LUA_COPYRIGHT " $\n"
"$Authors: " LUA_AUTHORS " $\n"
"$URL: www.lua.org $\n";
#ifndef api_check
#define api_check(L, o) /*{ assert(o); }*/
#endif
#define api_checknelems(L, n) api_check(L, (n) <= (L->top - L->base))
#define api_incr_top(L) {api_check(L, L->top < L->ci->top); L->top++;}
static TObject *negindex (lua_State *L, int idx) {
if (idx > LUA_REGISTRYINDEX) {
api_check(L, idx != 0 && -idx <= L->top - L->base);
return L->top+idx;
}
else switch (idx) { /* pseudo-indices */
case LUA_REGISTRYINDEX: return registry(L);
case LUA_GLOBALSINDEX: return gt(L);
default: {
TObject *func = (L->base - 1);
idx = LUA_GLOBALSINDEX - idx;
lua_assert(iscfunction(func));
return (idx <= clvalue(func)->c.nupvalues)
? &clvalue(func)->c.upvalue[idx-1]
: NULL;
}
}
}
static TObject *luaA_index (lua_State *L, int idx) {
if (idx > 0) {
api_check(L, idx <= L->top - L->base);
return L->base + idx - 1;
}
else {
TObject *o = negindex(L, idx);
api_check(L, o != NULL);
return o;
}
}
static TObject *luaA_indexAcceptable (lua_State *L, int idx) {
if (idx > 0) {
TObject *o = L->base+(idx-1);
api_check(L, idx <= L->stack_last - L->base);
if (o >= L->top) return NULL;
else return o;
}
else
return negindex(L, idx);
}
void luaA_pushobject (lua_State *L, const TObject *o) {
setobj2s(L->top, o);
incr_top(L);
}
LUA_API int lua_checkstack (lua_State *L, int size) {
int res;
lua_lock(L);
if ((L->top - L->base + size) > LUA_MAXCSTACK)
res = 0; /* stack overflow */
else {
luaD_checkstack(L, size);
if (L->ci->top < L->top + size)
L->ci->top = L->top + size;
res = 1;
}
lua_unlock(L);
return res;
}
LUA_API void lua_xmove (lua_State *from, lua_State *to, int n) {
int i;
lua_lock(to);
api_checknelems(from, n);
from->top -= n;
for (i = 0; i < n; i++) {
setobj2s(to->top, from->top + i);
api_incr_top(to);
}
lua_unlock(to);
}
LUA_API lua_CFunction lua_atpanic (lua_State *L, lua_CFunction panicf) {
lua_CFunction old;
lua_lock(L);
old = G(L)->panic;
G(L)->panic = panicf;
lua_unlock(L);
return old;
}
LUA_API lua_State *lua_newthread (lua_State *L) {
lua_State *L1;
lua_lock(L);
luaC_checkGC(L);
L1 = luaE_newthread(L);
setthvalue(L->top, L1);
api_incr_top(L);
lua_unlock(L);
lua_userstateopen(L1);
return L1;
}
/*
** basic stack manipulation
*/
LUA_API int lua_gettop (lua_State *L) {
return (L->top - L->base);
}
LUA_API void lua_settop (lua_State *L, int idx) {
lua_lock(L);
if (idx >= 0) {
api_check(L, idx <= L->stack_last - L->base);
while (L->top < L->base + idx)
setnilvalue(L->top++);
L->top = L->base + idx;
}
else {
api_check(L, -(idx+1) <= (L->top - L->base));
L->top += idx+1; /* `subtract' index (index is negative) */
}
lua_unlock(L);
}
LUA_API void lua_remove (lua_State *L, int idx) {
StkId p;
lua_lock(L);
p = luaA_index(L, idx);
while (++p < L->top) setobjs2s(p-1, p);
L->top--;
lua_unlock(L);
}
LUA_API void lua_insert (lua_State *L, int idx) {
StkId p;
StkId q;
lua_lock(L);
p = luaA_index(L, idx);
for (q = L->top; q>p; q--) setobjs2s(q, q-1);
setobjs2s(p, L->top);
lua_unlock(L);
}
LUA_API void lua_replace (lua_State *L, int idx) {
lua_lock(L);
api_checknelems(L, 1);
setobj(luaA_index(L, idx), L->top - 1); /* write barrier */
L->top--;
lua_unlock(L);
}
LUA_API void lua_pushvalue (lua_State *L, int idx) {
lua_lock(L);
setobj2s(L->top, luaA_index(L, idx));
api_incr_top(L);
lua_unlock(L);
}
/*
** access functions (stack -> C)
*/
LUA_API int lua_type (lua_State *L, int idx) {
StkId o = luaA_indexAcceptable(L, idx);
return (o == NULL) ? LUA_TNONE : ttype(o);
}
LUA_API const char *lua_typename (lua_State *L, int t) {
UNUSED(L);
return (t == LUA_TNONE) ? "no value" : luaT_typenames[t];
}
LUA_API int lua_iscfunction (lua_State *L, int idx) {
StkId o = luaA_indexAcceptable(L, idx);
return (o == NULL) ? 0 : iscfunction(o);
}
LUA_API int lua_isnumber (lua_State *L, int idx) {
TObject n;
const TObject *o = luaA_indexAcceptable(L, idx);
return (o != NULL && tonumber(o, &n));
}
LUA_API int lua_isstring (lua_State *L, int idx) {
int t = lua_type(L, idx);
return (t == LUA_TSTRING || t == LUA_TNUMBER);
}
LUA_API int lua_isuserdata (lua_State *L, int idx) {
const TObject *o = luaA_indexAcceptable(L, idx);
return (o != NULL && (ttisuserdata(o) || ttislightuserdata(o)));
}
LUA_API int lua_rawequal (lua_State *L, int index1, int index2) {
StkId o1 = luaA_indexAcceptable(L, index1);
StkId o2 = luaA_indexAcceptable(L, index2);
return (o1 == NULL || o2 == NULL) ? 0 /* index out of range */
: luaO_rawequalObj(o1, o2);
}
LUA_API int lua_equal (lua_State *L, int index1, int index2) {
StkId o1, o2;
int i;
lua_lock(L); /* may call tag method */
o1 = luaA_indexAcceptable(L, index1);
o2 = luaA_indexAcceptable(L, index2);
i = (o1 == NULL || o2 == NULL) ? 0 /* index out of range */
: equalobj(L, o1, o2);
lua_unlock(L);
return i;
}
LUA_API int lua_lessthan (lua_State *L, int index1, int index2) {
StkId o1, o2;
int i;
lua_lock(L); /* may call tag method */
o1 = luaA_indexAcceptable(L, index1);
o2 = luaA_indexAcceptable(L, index2);
i = (o1 == NULL || o2 == NULL) ? 0 /* index out-of-range */
: luaV_lessthan(L, o1, o2);
lua_unlock(L);
return i;
}
LUA_API lua_Number lua_tonumber (lua_State *L, int idx) {
TObject n;
const TObject *o = luaA_indexAcceptable(L, idx);
if (o != NULL && tonumber(o, &n))
return nvalue(o);
else
return 0;
}
LUA_API int lua_toboolean (lua_State *L, int idx) {
const TObject *o = luaA_indexAcceptable(L, idx);
return (o != NULL) && !l_isfalse(o);
}
LUA_API const char *lua_tostring (lua_State *L, int idx) {
StkId o = luaA_indexAcceptable(L, idx);
if (o == NULL)
return NULL;
else if (ttisstring(o))
return svalue(o);
else {
const char *s;
lua_lock(L); /* `luaV_tostring' may create a new string */
s = (luaV_tostring(L, o) ? svalue(o) : NULL);
luaC_checkGC(L);
lua_unlock(L);
return s;
}
}
LUA_API size_t lua_strlen (lua_State *L, int idx) {
StkId o = luaA_indexAcceptable(L, idx);
if (o == NULL)
return 0;
else if (ttisstring(o))
return tsvalue(o)->tsv.len;
else {
size_t l;
lua_lock(L); /* `luaV_tostring' may create a new string */
l = (luaV_tostring(L, o) ? tsvalue(o)->tsv.len : 0);
lua_unlock(L);
return l;
}
}
LUA_API lua_CFunction lua_tocfunction (lua_State *L, int idx) {
StkId o = luaA_indexAcceptable(L, idx);
return (o == NULL || !iscfunction(o)) ? NULL : clvalue(o)->c.f;
}
LUA_API void *lua_touserdata (lua_State *L, int idx) {
StkId o = luaA_indexAcceptable(L, idx);
if (o == NULL) return NULL;
switch (ttype(o)) {
case LUA_TUSERDATA: return (uvalue(o) + 1);
case LUA_TLIGHTUSERDATA: return pvalue(o);
default: return NULL;
}
}
LUA_API lua_State *lua_tothread (lua_State *L, int idx) {
StkId o = luaA_indexAcceptable(L, idx);
return (o == NULL || !ttisthread(o)) ? NULL : thvalue(o);
}
LUA_API const void *lua_topointer (lua_State *L, int idx) {
StkId o = luaA_indexAcceptable(L, idx);
if (o == NULL) return NULL;
else {
switch (ttype(o)) {
case LUA_TTABLE: return hvalue(o);
case LUA_TFUNCTION: return clvalue(o);
case LUA_TTHREAD: return thvalue(o);
case LUA_TUSERDATA:
case LUA_TLIGHTUSERDATA:
return lua_touserdata(L, idx);
default: return NULL;
}
}
}
/*
** push functions (C -> stack)
*/
LUA_API void lua_pushnil (lua_State *L) {
lua_lock(L);
setnilvalue(L->top);
api_incr_top(L);
lua_unlock(L);
}
LUA_API void lua_pushnumber (lua_State *L, lua_Number n) {
lua_lock(L);
setnvalue(L->top, n);
api_incr_top(L);
lua_unlock(L);
}
LUA_API void lua_pushlstring (lua_State *L, const char *s, size_t len) {
lua_lock(L);
luaC_checkGC(L);
setsvalue2s(L->top, luaS_newlstr(L, s, len));
api_incr_top(L);
lua_unlock(L);
}
LUA_API void lua_pushstring (lua_State *L, const char *s) {
if (s == NULL)
lua_pushnil(L);
else
lua_pushlstring(L, s, strlen(s));
}
LUA_API const char *lua_pushvfstring (lua_State *L, const char *fmt,
va_list argp) {
const char *ret;
lua_lock(L);
luaC_checkGC(L);
ret = luaO_pushvfstring(L, fmt, argp);
lua_unlock(L);
return ret;
}
LUA_API const char *lua_pushfstring (lua_State *L, const char *fmt, ...) {
const char *ret;
va_list argp;
lua_lock(L);
luaC_checkGC(L);
va_start(argp, fmt);
ret = luaO_pushvfstring(L, fmt, argp);
va_end(argp);
lua_unlock(L);
return ret;
}
LUA_API void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n) {
Closure *cl;
lua_lock(L);
luaC_checkGC(L);
api_checknelems(L, n);
cl = luaF_newCclosure(L, n);
cl->c.f = fn;
L->top -= n;
while (n--)
setobj2n(&cl->c.upvalue[n], L->top+n);
setclvalue(L->top, cl);
api_incr_top(L);
lua_unlock(L);
}
LUA_API void lua_pushboolean (lua_State *L, int b) {
lua_lock(L);
setbvalue(L->top, (b != 0)); /* ensure that true is 1 */
api_incr_top(L);
lua_unlock(L);
}
LUA_API void lua_pushlightuserdata (lua_State *L, void *p) {
lua_lock(L);
setpvalue(L->top, p);
api_incr_top(L);
lua_unlock(L);
}
/*
** get functions (Lua -> stack)
*/
LUA_API void lua_gettable (lua_State *L, int idx) {
StkId t;
lua_lock(L);
t = luaA_index(L, idx);
setobj2s(L->top - 1, luaV_gettable(L, t, L->top - 1, 0));
lua_unlock(L);
}
LUA_API void lua_rawget (lua_State *L, int idx) {
StkId t;
lua_lock(L);
t = luaA_index(L, idx);
api_check(L, ttistable(t));
setobj2s(L->top - 1, luaH_get(hvalue(t), L->top - 1));
lua_unlock(L);
}
LUA_API void lua_rawgeti (lua_State *L, int idx, int n) {
StkId o;
lua_lock(L);
o = luaA_index(L, idx);
api_check(L, ttistable(o));
setobj2s(L->top, luaH_getnum(hvalue(o), n));
api_incr_top(L);
lua_unlock(L);
}
LUA_API void lua_newtable (lua_State *L) {
lua_lock(L);
luaC_checkGC(L);
sethvalue(L->top, luaH_new(L, 0, 0));
api_incr_top(L);
lua_unlock(L);
}
LUA_API int lua_getmetatable (lua_State *L, int objindex) {
const TObject *obj;
Table *mt = NULL;
int res;
lua_lock(L);
obj = luaA_indexAcceptable(L, objindex);
if (obj != NULL) {
switch (ttype(obj)) {
case LUA_TTABLE:
mt = hvalue(obj)->metatable;
break;
case LUA_TUSERDATA:
mt = uvalue(obj)->uv.metatable;
break;
}
}
if (mt == NULL || mt == hvalue(defaultmeta(L)))
res = 0;
else {
sethvalue(L->top, mt);
api_incr_top(L);
res = 1;
}
lua_unlock(L);
return res;
}
LUA_API void lua_getfenv (lua_State *L, int idx) {
StkId o;
lua_lock(L);
o = luaA_index(L, idx);
setobj2s(L->top, isLfunction(o) ? &clvalue(o)->l.g : gt(L));
api_incr_top(L);
lua_unlock(L);
}
/*
** set functions (stack -> Lua)
*/
LUA_API void lua_settable (lua_State *L, int idx) {
StkId t;
lua_lock(L);
api_checknelems(L, 2);
t = luaA_index(L, idx);
luaV_settable(L, t, L->top - 2, L->top - 1);
L->top -= 2; /* pop index and value */
lua_unlock(L);
}
LUA_API void lua_rawset (lua_State *L, int idx) {
StkId t;
lua_lock(L);
api_checknelems(L, 2);
t = luaA_index(L, idx);
api_check(L, ttistable(t));
setobj2t(luaH_set(L, hvalue(t), L->top-2), L->top-1); /* write barrier */
L->top -= 2;
lua_unlock(L);
}
LUA_API void lua_rawseti (lua_State *L, int idx, int n) {
StkId o;
lua_lock(L);
api_checknelems(L, 1);
o = luaA_index(L, idx);
api_check(L, ttistable(o));
setobj2t(luaH_setnum(L, hvalue(o), n), L->top-1); /* write barrier */
L->top--;
lua_unlock(L);
}
LUA_API int lua_setmetatable (lua_State *L, int objindex) {
TObject *obj, *mt;
int res = 1;
lua_lock(L);
api_checknelems(L, 1);
obj = luaA_index(L, objindex);
mt = (!ttisnil(L->top - 1)) ? L->top - 1 : defaultmeta(L);
api_check(L, ttistable(mt));
switch (ttype(obj)) {
case LUA_TTABLE: {
hvalue(obj)->metatable = hvalue(mt); /* write barrier */
break;
}
case LUA_TUSERDATA: {
uvalue(obj)->uv.metatable = hvalue(mt); /* write barrier */
break;
}
default: {
res = 0; /* cannot set */
break;
}
}
L->top--;
lua_unlock(L);
return res;
}
LUA_API int lua_setfenv (lua_State *L, int idx) {
StkId o;
int res = 0;
lua_lock(L);
api_checknelems(L, 1);
o = luaA_index(L, idx);
L->top--;
api_check(L, ttistable(L->top));
if (isLfunction(o)) {
res = 1;
clvalue(o)->l.g = *(L->top);
}
lua_unlock(L);
return res;
}
/*
** `load' and `call' functions (run Lua code)
*/
LUA_API void lua_call (lua_State *L, int nargs, int nresults) {
StkId func;
lua_lock(L);
api_checknelems(L, nargs+1);
func = L->top - (nargs+1);
luaD_call(L, func, nresults);
lua_unlock(L);
}
/*
** Execute a protected call.
*/
struct CallS { /* data to `f_call' */
StkId func;
int nresults;
};
static void f_call (lua_State *L, void *ud) {
struct CallS *c = cast(struct CallS *, ud);
luaD_call(L, c->func, c->nresults);
}
LUA_API int lua_pcall (lua_State *L, int nargs, int nresults, int errfunc) {
struct CallS c;
int status;
ptrdiff_t func;
lua_lock(L);
func = (errfunc == 0) ? 0 : savestack(L, luaA_index(L, errfunc));
c.func = L->top - (nargs+1); /* function to be called */
c.nresults = nresults;
status = luaD_pcall(L, f_call, &c, savestack(L, c.func), func);
lua_unlock(L);
return status;
}
/*
** Execute a protected C call.
*/
struct CCallS { /* data to `f_Ccall' */
lua_CFunction func;
void *ud;
};
static void f_Ccall (lua_State *L, void *ud) {
struct CCallS *c = cast(struct CCallS *, ud);
Closure *cl;
cl = luaF_newCclosure(L, 0);
cl->c.f = c->func;
setclvalue(L->top, cl); /* push function */
incr_top(L);
setpvalue(L->top, c->ud); /* push only argument */
incr_top(L);
luaD_call(L, L->top - 2, 0);
}
LUA_API int lua_cpcall (lua_State *L, lua_CFunction func, void *ud) {
struct CCallS c;
int status;
lua_lock(L);
c.func = func;
c.ud = ud;
status = luaD_pcall(L, f_Ccall, &c, savestack(L, L->top), 0);
lua_unlock(L);
return status;
}
LUA_API int lua_load (lua_State *L, lua_Chunkreader reader, void *data,
const char *chunkname) {
ZIO z;
int status;
int c;
lua_lock(L);
if (!chunkname) chunkname = "?";
luaZ_init(&z, reader, data, chunkname);
c = luaZ_lookahead(&z);
status = luaD_protectedparser(L, &z, (c == LUA_SIGNATURE[0]));
lua_unlock(L);
return status;
}
LUA_API int lua_dump (lua_State *L, lua_Chunkwriter writer, void *data) {
int status;
TObject *o;
lua_lock(L);
api_checknelems(L, 1);
o = L->top - 1;
if (isLfunction(o) && clvalue(o)->l.nupvalues == 0) {
luaU_dump(L, clvalue(o)->l.p, writer, data);
status = 1;
}
else
status = 0;
lua_unlock(L);
return status;
}
/*
** Garbage-collection functions
*/
/* GC values are expressed in Kbytes: #bytes/2^10 */
#define GCscalel(x) ((x)>>10)
#define GCscale(x) (cast(int, GCscalel(x)))
#define GCunscale(x) (cast(lu_mem, x)<<10)
LUA_API int lua_getgcthreshold (lua_State *L) {
int threshold;
lua_lock(L);
threshold = GCscale(G(L)->GCthreshold);
lua_unlock(L);
return threshold;
}
LUA_API int lua_getgccount (lua_State *L) {
int count;
lua_lock(L);
count = GCscale(G(L)->nblocks);
lua_unlock(L);
return count;
}
LUA_API void lua_setgcthreshold (lua_State *L, int newthreshold) {
lua_lock(L);
if (cast(lu_mem, newthreshold) > GCscalel(MAX_LUMEM))
G(L)->GCthreshold = MAX_LUMEM;
else
G(L)->GCthreshold = GCunscale(newthreshold);
luaC_checkGC(L);
lua_unlock(L);
}
/*
** miscellaneous functions
*/
LUA_API const char *lua_version (void) {
return LUA_VERSION;
}
LUA_API int lua_error (lua_State *L) {
lua_lock(L);
api_checknelems(L, 1);
luaG_errormsg(L);
lua_unlock(L);
return 0; /* to avoid warnings */
}
LUA_API int lua_next (lua_State *L, int idx) {
StkId t;
int more;
lua_lock(L);
t = luaA_index(L, idx);
api_check(L, ttistable(t));
more = luaH_next(L, hvalue(t), L->top - 1);
if (more) {
api_incr_top(L);
}
else /* no more elements */
L->top -= 1; /* remove key */
lua_unlock(L);
return more;
}
LUA_API void lua_concat (lua_State *L, int n) {
lua_lock(L);
luaC_checkGC(L);
api_checknelems(L, n);
if (n >= 2) {
luaV_concat(L, n, L->top - L->base - 1);
L->top -= (n-1);
}
else if (n == 0) { /* push empty string */
setsvalue2s(L->top, luaS_newlstr(L, NULL, 0));
api_incr_top(L);
}
/* else n == 1; nothing to do */
lua_unlock(L);
}
LUA_API void *lua_newuserdata (lua_State *L, size_t size) {
Udata *u;
lua_lock(L);
luaC_checkGC(L);
u = luaS_newudata(L, size);
setuvalue(L->top, u);
api_incr_top(L);
lua_unlock(L);
return u + 1;
}
LUA_API int lua_pushupvalues (lua_State *L) {
Closure *func;
int n, i;
lua_lock(L);
api_check(L, iscfunction(L->base - 1));
func = clvalue(L->base - 1);
n = func->c.nupvalues;
luaD_checkstack(L, n + LUA_MINSTACK);
for (i=0; i<n; i++) {
setobj2s(L->top, &func->c.upvalue[i]);
L->top++;
}
lua_unlock(L);
return n;
}
static const char *aux_upvalue (lua_State *L, int funcindex, int n,
TObject **val) {
Closure *f;
StkId fi = luaA_index(L, funcindex);
if (!ttisfunction(fi)) return NULL;
f = clvalue(fi);
if (f->c.isC) {
if (!(1 <= n && n <= f->c.nupvalues)) return NULL;
*val = &f->c.upvalue[n-1];
return "";
}
else {
Proto *p = f->l.p;
if (!(1 <= n && n <= p->sizeupvalues)) return NULL;
*val = f->l.upvals[n-1]->v;
return getstr(p->upvalues[n-1]);
}
}
LUA_API const char *lua_getupvalue (lua_State *L, int funcindex, int n) {
const char *name;
TObject *val;
lua_lock(L);
name = aux_upvalue(L, funcindex, n, &val);
if (name) {
setobj2s(L->top, val);
api_incr_top(L);
}
lua_unlock(L);
return name;
}
LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n) {
const char *name;
TObject *val;
lua_lock(L);
api_checknelems(L, 1);
name = aux_upvalue(L, funcindex, n, &val);
if (name) {
L->top--;
setobj(val, L->top); /* write barrier */
}
lua_unlock(L);
return name;
}

16
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/*
** $Id: lapi.h,v 1.21 2002/03/04 21:29:41 roberto Exp $
** Auxiliary functions from Lua API
** See Copyright Notice in lua.h
*/
#ifndef lapi_h
#define lapi_h
#include "lobject.h"
void luaA_pushobject (lua_State *L, const TObject *o);
#endif

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/*
** $Id: lcode.c,v 1.117a 2003/04/03 13:35:34 roberto Exp $
** Code generator for Lua
** See Copyright Notice in lua.h
*/
#include <stdlib.h>
#define lcode_c
#include "lua.h"
#include "lcode.h"
#include "ldebug.h"
#include "ldo.h"
#include "llex.h"
#include "lmem.h"
#include "lobject.h"
#include "lopcodes.h"
#include "lparser.h"
#include "ltable.h"
#define hasjumps(e) ((e)->t != (e)->f)
void luaK_nil (FuncState *fs, int from, int n) {
Instruction *previous;
if (fs->pc > fs->lasttarget && /* no jumps to current position? */
GET_OPCODE(*(previous = &fs->f->code[fs->pc-1])) == OP_LOADNIL) {
int pfrom = GETARG_A(*previous);
int pto = GETARG_B(*previous);
if (pfrom <= from && from <= pto+1) { /* can connect both? */
if (from+n-1 > pto)
SETARG_B(*previous, from+n-1);
return;
}
}
luaK_codeABC(fs, OP_LOADNIL, from, from+n-1, 0); /* else no optimization */
}
int luaK_jump (FuncState *fs) {
int jpc = fs->jpc; /* save list of jumps to here */
int j;
fs->jpc = NO_JUMP;
j = luaK_codeAsBx(fs, OP_JMP, 0, NO_JUMP);
luaK_concat(fs, &j, jpc); /* keep them on hold */
return j;
}
static int luaK_condjump (FuncState *fs, OpCode op, int A, int B, int C) {
luaK_codeABC(fs, op, A, B, C);
return luaK_jump(fs);
}
static void luaK_fixjump (FuncState *fs, int pc, int dest) {
Instruction *jmp = &fs->f->code[pc];
int offset = dest-(pc+1);
lua_assert(dest != NO_JUMP);
if (abs(offset) > MAXARG_sBx)
luaX_syntaxerror(fs->ls, "control structure too long");
SETARG_sBx(*jmp, offset);
}
/*
** returns current `pc' and marks it as a jump target (to avoid wrong
** optimizations with consecutive instructions not in the same basic block).
*/
int luaK_getlabel (FuncState *fs) {
fs->lasttarget = fs->pc;
return fs->pc;
}
static int luaK_getjump (FuncState *fs, int pc) {
int offset = GETARG_sBx(fs->f->code[pc]);
if (offset == NO_JUMP) /* point to itself represents end of list */
return NO_JUMP; /* end of list */
else
return (pc+1)+offset; /* turn offset into absolute position */
}
static Instruction *getjumpcontrol (FuncState *fs, int pc) {
Instruction *pi = &fs->f->code[pc];
if (pc >= 1 && testOpMode(GET_OPCODE(*(pi-1)), OpModeT))
return pi-1;
else
return pi;
}
/*
** check whether list has any jump that do not produce a value
** (or produce an inverted value)
*/
static int need_value (FuncState *fs, int list, int cond) {
for (; list != NO_JUMP; list = luaK_getjump(fs, list)) {
Instruction i = *getjumpcontrol(fs, list);
if (GET_OPCODE(i) != OP_TEST ||
GETARG_A(i) != NO_REG ||
GETARG_C(i) != cond)
return 1;
}
return 0; /* not found */
}
static void patchtestreg (Instruction *i, int reg) {
if (reg == NO_REG) reg = GETARG_B(*i);
SETARG_A(*i, reg);
}
static void removevalues (FuncState *fs, int list) {
for (; list != NO_JUMP; list = luaK_getjump(fs, list)) {
Instruction *i = getjumpcontrol(fs, list);
if (GET_OPCODE(*i) == OP_TEST)
patchtestreg(i, NO_REG);
}
}
static void luaK_patchlistaux (FuncState *fs, int list, int vtarget, int reg,
int dtarget) {
while (list != NO_JUMP) {
int next = luaK_getjump(fs, list);
Instruction *i = getjumpcontrol(fs, list);
if (GET_OPCODE(*i) == OP_TEST && GETARG_A(*i) == NO_REG) {
patchtestreg(i, reg);
luaK_fixjump(fs, list, vtarget);
}
else
luaK_fixjump(fs, list, dtarget); /* jump to default target */
list = next;
}
}
static void luaK_dischargejpc (FuncState *fs) {
luaK_patchlistaux(fs, fs->jpc, fs->pc, NO_REG, fs->pc);
fs->jpc = NO_JUMP;
}
void luaK_patchlist (FuncState *fs, int list, int target) {
if (target == fs->pc)
luaK_patchtohere(fs, list);
else {
lua_assert(target < fs->pc);
luaK_patchlistaux(fs, list, target, NO_REG, target);
}
}
void luaK_patchtohere (FuncState *fs, int list) {
luaK_getlabel(fs);
luaK_concat(fs, &fs->jpc, list);
}
void luaK_concat (FuncState *fs, int *l1, int l2) {
if (l2 == NO_JUMP) return;
else if (*l1 == NO_JUMP)
*l1 = l2;
else {
int list = *l1;
int next;
while ((next = luaK_getjump(fs, list)) != NO_JUMP) /* find last element */
list = next;
luaK_fixjump(fs, list, l2);
}
}
void luaK_checkstack (FuncState *fs, int n) {
int newstack = fs->freereg + n;
if (newstack > fs->f->maxstacksize) {
if (newstack >= MAXSTACK)
luaX_syntaxerror(fs->ls, "function or expression too complex");
fs->f->maxstacksize = cast(lu_byte, newstack);
}
}
void luaK_reserveregs (FuncState *fs, int n) {
luaK_checkstack(fs, n);
fs->freereg += n;
}
static void freereg (FuncState *fs, int reg) {
if (reg >= fs->nactvar && reg < MAXSTACK) {
fs->freereg--;
lua_assert(reg == fs->freereg);
}
}
static void freeexp (FuncState *fs, expdesc *e) {
if (e->k == VNONRELOC)
freereg(fs, e->info);
}
static int addk (FuncState *fs, TObject *k, TObject *v) {
const TObject *idx = luaH_get(fs->h, k);
if (ttisnumber(idx)) {
lua_assert(luaO_rawequalObj(&fs->f->k[cast(int, nvalue(idx))], v));
return cast(int, nvalue(idx));
}
else { /* constant not found; create a new entry */
Proto *f = fs->f;
luaM_growvector(fs->L, f->k, fs->nk, f->sizek, TObject,
MAXARG_Bx, "constant table overflow");
setobj2n(&f->k[fs->nk], v);
setnvalue(luaH_set(fs->L, fs->h, k), cast(lua_Number, fs->nk));
return fs->nk++;
}
}
int luaK_stringK (FuncState *fs, TString *s) {
TObject o;
setsvalue(&o, s);
return addk(fs, &o, &o);
}
int luaK_numberK (FuncState *fs, lua_Number r) {
TObject o;
setnvalue(&o, r);
return addk(fs, &o, &o);
}
static int nil_constant (FuncState *fs) {
TObject k, v;
setnilvalue(&v);
sethvalue(&k, fs->h); /* cannot use nil as key; instead use table itself */
return addk(fs, &k, &v);
}
void luaK_setcallreturns (FuncState *fs, expdesc *e, int nresults) {
if (e->k == VCALL) { /* expression is an open function call? */
SETARG_C(getcode(fs, e), nresults+1);
if (nresults == 1) { /* `regular' expression? */
e->k = VNONRELOC;
e->info = GETARG_A(getcode(fs, e));
}
}
}
void luaK_dischargevars (FuncState *fs, expdesc *e) {
switch (e->k) {
case VLOCAL: {
e->k = VNONRELOC;
break;
}
case VUPVAL: {
e->info = luaK_codeABC(fs, OP_GETUPVAL, 0, e->info, 0);
e->k = VRELOCABLE;
break;
}
case VGLOBAL: {
e->info = luaK_codeABx(fs, OP_GETGLOBAL, 0, e->info);
e->k = VRELOCABLE;
break;
}
case VINDEXED: {
freereg(fs, e->aux);
freereg(fs, e->info);
e->info = luaK_codeABC(fs, OP_GETTABLE, 0, e->info, e->aux);
e->k = VRELOCABLE;
break;
}
case VCALL: {
luaK_setcallreturns(fs, e, 1);
break;
}
default: break; /* there is one value available (somewhere) */
}
}
static int code_label (FuncState *fs, int A, int b, int jump) {
luaK_getlabel(fs); /* those instructions may be jump targets */
return luaK_codeABC(fs, OP_LOADBOOL, A, b, jump);
}
static void discharge2reg (FuncState *fs, expdesc *e, int reg) {
luaK_dischargevars(fs, e);
switch (e->k) {
case VNIL: {
luaK_nil(fs, reg, 1);
break;
}
case VFALSE: case VTRUE: {
luaK_codeABC(fs, OP_LOADBOOL, reg, e->k == VTRUE, 0);
break;
}
case VK: {
luaK_codeABx(fs, OP_LOADK, reg, e->info);
break;
}
case VRELOCABLE: {
Instruction *pc = &getcode(fs, e);
SETARG_A(*pc, reg);
break;
}
case VNONRELOC: {
if (reg != e->info)
luaK_codeABC(fs, OP_MOVE, reg, e->info, 0);
break;
}
default: {
lua_assert(e->k == VVOID || e->k == VJMP);
return; /* nothing to do... */
}
}
e->info = reg;
e->k = VNONRELOC;
}
static void discharge2anyreg (FuncState *fs, expdesc *e) {
if (e->k != VNONRELOC) {
luaK_reserveregs(fs, 1);
discharge2reg(fs, e, fs->freereg-1);
}
}
static void luaK_exp2reg (FuncState *fs, expdesc *e, int reg) {
discharge2reg(fs, e, reg);
if (e->k == VJMP)
luaK_concat(fs, &e->t, e->info); /* put this jump in `t' list */
if (hasjumps(e)) {
int final; /* position after whole expression */
int p_f = NO_JUMP; /* position of an eventual LOAD false */
int p_t = NO_JUMP; /* position of an eventual LOAD true */
if (need_value(fs, e->t, 1) || need_value(fs, e->f, 0)) {
int fj = NO_JUMP; /* first jump (over LOAD ops.) */
if (e->k != VJMP)
fj = luaK_jump(fs);
p_f = code_label(fs, reg, 0, 1);
p_t = code_label(fs, reg, 1, 0);
luaK_patchtohere(fs, fj);
}
final = luaK_getlabel(fs);
luaK_patchlistaux(fs, e->f, final, reg, p_f);
luaK_patchlistaux(fs, e->t, final, reg, p_t);
}
e->f = e->t = NO_JUMP;
e->info = reg;
e->k = VNONRELOC;
}
void luaK_exp2nextreg (FuncState *fs, expdesc *e) {
luaK_dischargevars(fs, e);
freeexp(fs, e);
luaK_reserveregs(fs, 1);
luaK_exp2reg(fs, e, fs->freereg - 1);
}
int luaK_exp2anyreg (FuncState *fs, expdesc *e) {
luaK_dischargevars(fs, e);
if (e->k == VNONRELOC) {
if (!hasjumps(e)) return e->info; /* exp is already in a register */
if (e->info >= fs->nactvar) { /* reg. is not a local? */
luaK_exp2reg(fs, e, e->info); /* put value on it */
return e->info;
}
}
luaK_exp2nextreg(fs, e); /* default */
return e->info;
}
void luaK_exp2val (FuncState *fs, expdesc *e) {
if (hasjumps(e))
luaK_exp2anyreg(fs, e);
else
luaK_dischargevars(fs, e);
}
int luaK_exp2RK (FuncState *fs, expdesc *e) {
luaK_exp2val(fs, e);
switch (e->k) {
case VNIL: {
if (fs->nk + MAXSTACK <= MAXARG_C) { /* constant fit in argC? */
e->info = nil_constant(fs);
e->k = VK;
return e->info + MAXSTACK;
}
else break;
}
case VK: {
if (e->info + MAXSTACK <= MAXARG_C) /* constant fit in argC? */
return e->info + MAXSTACK;
else break;
}
default: break;
}
/* not a constant in the right range: put it in a register */
return luaK_exp2anyreg(fs, e);
}
void luaK_storevar (FuncState *fs, expdesc *var, expdesc *exp) {
switch (var->k) {
case VLOCAL: {
freeexp(fs, exp);
luaK_exp2reg(fs, exp, var->info);
return;
}
case VUPVAL: {
int e = luaK_exp2anyreg(fs, exp);
luaK_codeABC(fs, OP_SETUPVAL, e, var->info, 0);
break;
}
case VGLOBAL: {
int e = luaK_exp2anyreg(fs, exp);
luaK_codeABx(fs, OP_SETGLOBAL, e, var->info);
break;
}
case VINDEXED: {
int e = luaK_exp2RK(fs, exp);
luaK_codeABC(fs, OP_SETTABLE, var->info, var->aux, e);
break;
}
default: {
lua_assert(0); /* invalid var kind to store */
break;
}
}
freeexp(fs, exp);
}
void luaK_self (FuncState *fs, expdesc *e, expdesc *key) {
int func;
luaK_exp2anyreg(fs, e);
freeexp(fs, e);
func = fs->freereg;
luaK_reserveregs(fs, 2);
luaK_codeABC(fs, OP_SELF, func, e->info, luaK_exp2RK(fs, key));
freeexp(fs, key);
e->info = func;
e->k = VNONRELOC;
}
static void invertjump (FuncState *fs, expdesc *e) {
Instruction *pc = getjumpcontrol(fs, e->info);
lua_assert(testOpMode(GET_OPCODE(*pc), OpModeT) &&
GET_OPCODE(*pc) != OP_TEST);
SETARG_A(*pc, !(GETARG_A(*pc)));
}
static int jumponcond (FuncState *fs, expdesc *e, int cond) {
if (e->k == VRELOCABLE) {
Instruction ie = getcode(fs, e);
if (GET_OPCODE(ie) == OP_NOT) {
fs->pc--; /* remove previous OP_NOT */
return luaK_condjump(fs, OP_TEST, GETARG_B(ie), GETARG_B(ie), !cond);
}
/* else go through */
}
discharge2anyreg(fs, e);
freeexp(fs, e);
return luaK_condjump(fs, OP_TEST, NO_REG, e->info, cond);
}
void luaK_goiftrue (FuncState *fs, expdesc *e) {
int pc; /* pc of last jump */
luaK_dischargevars(fs, e);
switch (e->k) {
case VK: case VTRUE: {
pc = NO_JUMP; /* always true; do nothing */
break;
}
case VFALSE: {
pc = luaK_jump(fs); /* always jump */
break;
}
case VJMP: {
invertjump(fs, e);
pc = e->info;
break;
}
default: {
pc = jumponcond(fs, e, 0);
break;
}
}
luaK_concat(fs, &e->f, pc); /* insert last jump in `f' list */
}
void luaK_goiffalse (FuncState *fs, expdesc *e) {
int pc; /* pc of last jump */
luaK_dischargevars(fs, e);
switch (e->k) {
case VNIL: case VFALSE: {
pc = NO_JUMP; /* always false; do nothing */
break;
}
case VTRUE: {
pc = luaK_jump(fs); /* always jump */
break;
}
case VJMP: {
pc = e->info;
break;
}
default: {
pc = jumponcond(fs, e, 1);
break;
}
}
luaK_concat(fs, &e->t, pc); /* insert last jump in `t' list */
}
static void codenot (FuncState *fs, expdesc *e) {
luaK_dischargevars(fs, e);
switch (e->k) {
case VNIL: case VFALSE: {
e->k = VTRUE;
break;
}
case VK: case VTRUE: {
e->k = VFALSE;
break;
}
case VJMP: {
invertjump(fs, e);
break;
}
case VRELOCABLE:
case VNONRELOC: {
discharge2anyreg(fs, e);
freeexp(fs, e);
e->info = luaK_codeABC(fs, OP_NOT, 0, e->info, 0);
e->k = VRELOCABLE;
break;
}
default: {
lua_assert(0); /* cannot happen */
break;
}
}
/* interchange true and false lists */
{ int temp = e->f; e->f = e->t; e->t = temp; }
removevalues(fs, e->f);
removevalues(fs, e->t);
}
void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k) {
t->aux = luaK_exp2RK(fs, k);
t->k = VINDEXED;
}
void luaK_prefix (FuncState *fs, UnOpr op, expdesc *e) {
if (op == OPR_MINUS) {
luaK_exp2val(fs, e);
if (e->k == VK && ttisnumber(&fs->f->k[e->info]))
e->info = luaK_numberK(fs, -nvalue(&fs->f->k[e->info]));
else {
luaK_exp2anyreg(fs, e);
freeexp(fs, e);
e->info = luaK_codeABC(fs, OP_UNM, 0, e->info, 0);
e->k = VRELOCABLE;
}
}
else /* op == NOT */
codenot(fs, e);
}
void luaK_infix (FuncState *fs, BinOpr op, expdesc *v) {
switch (op) {
case OPR_AND: {
luaK_goiftrue(fs, v);
luaK_patchtohere(fs, v->t);
v->t = NO_JUMP;
break;
}
case OPR_OR: {
luaK_goiffalse(fs, v);
luaK_patchtohere(fs, v->f);
v->f = NO_JUMP;
break;
}
case OPR_CONCAT: {
luaK_exp2nextreg(fs, v); /* operand must be on the `stack' */
break;
}
default: {
luaK_exp2RK(fs, v);
break;
}
}
}
static void codebinop (FuncState *fs, expdesc *res, BinOpr op,
int o1, int o2) {
if (op <= OPR_POW) { /* arithmetic operator? */
OpCode opc = cast(OpCode, (op - OPR_ADD) + OP_ADD); /* ORDER OP */
res->info = luaK_codeABC(fs, opc, 0, o1, o2);
res->k = VRELOCABLE;
}
else { /* test operator */
static const OpCode ops[] = {OP_EQ, OP_EQ, OP_LT, OP_LE, OP_LT, OP_LE};
int cond = 1;
if (op >= OPR_GT) { /* `>' or `>='? */
int temp; /* exchange args and replace by `<' or `<=' */
temp = o1; o1 = o2; o2 = temp; /* o1 <==> o2 */
}
else if (op == OPR_NE) cond = 0;
res->info = luaK_condjump(fs, ops[op - OPR_NE], cond, o1, o2);
res->k = VJMP;
}
}
void luaK_posfix (FuncState *fs, BinOpr op, expdesc *e1, expdesc *e2) {
switch (op) {
case OPR_AND: {
lua_assert(e1->t == NO_JUMP); /* list must be closed */
luaK_dischargevars(fs, e2);
luaK_concat(fs, &e1->f, e2->f);
e1->k = e2->k; e1->info = e2->info; e1->aux = e2->aux; e1->t = e2->t;
break;
}
case OPR_OR: {
lua_assert(e1->f == NO_JUMP); /* list must be closed */
luaK_dischargevars(fs, e2);
luaK_concat(fs, &e1->t, e2->t);
e1->k = e2->k; e1->info = e2->info; e1->aux = e2->aux; e1->f = e2->f;
break;
}
case OPR_CONCAT: {
luaK_exp2val(fs, e2);
if (e2->k == VRELOCABLE && GET_OPCODE(getcode(fs, e2)) == OP_CONCAT) {
lua_assert(e1->info == GETARG_B(getcode(fs, e2))-1);
freeexp(fs, e1);
SETARG_B(getcode(fs, e2), e1->info);
e1->k = e2->k; e1->info = e2->info;
}
else {
luaK_exp2nextreg(fs, e2);
freeexp(fs, e2);
freeexp(fs, e1);
e1->info = luaK_codeABC(fs, OP_CONCAT, 0, e1->info, e2->info);
e1->k = VRELOCABLE;
}
break;
}
default: {
int o1 = luaK_exp2RK(fs, e1);
int o2 = luaK_exp2RK(fs, e2);
freeexp(fs, e2);
freeexp(fs, e1);
codebinop(fs, e1, op, o1, o2);
}
}
}
void luaK_fixline (FuncState *fs, int line) {
fs->f->lineinfo[fs->pc - 1] = line;
}
int luaK_code (FuncState *fs, Instruction i, int line) {
Proto *f = fs->f;
luaK_dischargejpc(fs); /* `pc' will change */
/* put new instruction in code array */
luaM_growvector(fs->L, f->code, fs->pc, f->sizecode, Instruction,
MAX_INT, "code size overflow");
f->code[fs->pc] = i;
/* save corresponding line information */
luaM_growvector(fs->L, f->lineinfo, fs->pc, f->sizelineinfo, int,
MAX_INT, "code size overflow");
f->lineinfo[fs->pc] = line;
return fs->pc++;
}
int luaK_codeABC (FuncState *fs, OpCode o, int a, int b, int c) {
lua_assert(getOpMode(o) == iABC);
return luaK_code(fs, CREATE_ABC(o, a, b, c), fs->ls->lastline);
}
int luaK_codeABx (FuncState *fs, OpCode o, int a, unsigned int bc) {
lua_assert(getOpMode(o) == iABx || getOpMode(o) == iAsBx);
return luaK_code(fs, CREATE_ABx(o, a, bc), fs->ls->lastline);
}

74
auto3/lua/src/lcode.h Normal file
View file

@ -0,0 +1,74 @@
/*
** $Id: lcode.h,v 1.38 2002/12/11 12:34:22 roberto Exp $
** Code generator for Lua
** See Copyright Notice in lua.h
*/
#ifndef lcode_h
#define lcode_h
#include "llex.h"
#include "lobject.h"
#include "lopcodes.h"
#include "lparser.h"
/*
** Marks the end of a patch list. It is an invalid value both as an absolute
** address, and as a list link (would link an element to itself).
*/
#define NO_JUMP (-1)
/*
** grep "ORDER OPR" if you change these enums
*/
typedef enum BinOpr {
OPR_ADD, OPR_SUB, OPR_MULT, OPR_DIV, OPR_POW,
OPR_CONCAT,
OPR_NE, OPR_EQ,
OPR_LT, OPR_LE, OPR_GT, OPR_GE,
OPR_AND, OPR_OR,
OPR_NOBINOPR
} BinOpr;
#define binopistest(op) ((op) >= OPR_NE)
typedef enum UnOpr { OPR_MINUS, OPR_NOT, OPR_NOUNOPR } UnOpr;
#define getcode(fs,e) ((fs)->f->code[(e)->info])
#define luaK_codeAsBx(fs,o,A,sBx) luaK_codeABx(fs,o,A,(sBx)+MAXARG_sBx)
int luaK_code (FuncState *fs, Instruction i, int line);
int luaK_codeABx (FuncState *fs, OpCode o, int A, unsigned int Bx);
int luaK_codeABC (FuncState *fs, OpCode o, int A, int B, int C);
void luaK_fixline (FuncState *fs, int line);
void luaK_nil (FuncState *fs, int from, int n);
void luaK_reserveregs (FuncState *fs, int n);
void luaK_checkstack (FuncState *fs, int n);
int luaK_stringK (FuncState *fs, TString *s);
int luaK_numberK (FuncState *fs, lua_Number r);
void luaK_dischargevars (FuncState *fs, expdesc *e);
int luaK_exp2anyreg (FuncState *fs, expdesc *e);
void luaK_exp2nextreg (FuncState *fs, expdesc *e);
void luaK_exp2val (FuncState *fs, expdesc *e);
int luaK_exp2RK (FuncState *fs, expdesc *e);
void luaK_self (FuncState *fs, expdesc *e, expdesc *key);
void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k);
void luaK_goiftrue (FuncState *fs, expdesc *e);
void luaK_goiffalse (FuncState *fs, expdesc *e);
void luaK_storevar (FuncState *fs, expdesc *var, expdesc *e);
void luaK_setcallreturns (FuncState *fs, expdesc *var, int nresults);
int luaK_jump (FuncState *fs);
void luaK_patchlist (FuncState *fs, int list, int target);
void luaK_patchtohere (FuncState *fs, int list);
void luaK_concat (FuncState *fs, int *l1, int l2);
int luaK_getlabel (FuncState *fs);
void luaK_prefix (FuncState *fs, UnOpr op, expdesc *v);
void luaK_infix (FuncState *fs, BinOpr op, expdesc *v);
void luaK_posfix (FuncState *fs, BinOpr op, expdesc *v1, expdesc *v2);
#endif

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/*
** $Id: ldebug.c,v 1.150 2003/03/19 21:24:04 roberto Exp $
** Debug Interface
** See Copyright Notice in lua.h
*/
#include <stdlib.h>
#include <string.h>
#define ldebug_c
#include "lua.h"
#include "lapi.h"
#include "lcode.h"
#include "ldebug.h"
#include "ldo.h"
#include "lfunc.h"
#include "lobject.h"
#include "lopcodes.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "ltm.h"
#include "lvm.h"
static const char *getfuncname (CallInfo *ci, const char **name);
#define isLua(ci) (!((ci)->state & CI_C))
static int currentpc (CallInfo *ci) {
if (!isLua(ci)) return -1; /* function is not a Lua function? */
if (ci->state & CI_HASFRAME) /* function has a frame? */
ci->u.l.savedpc = *ci->u.l.pc; /* use `pc' from there */
/* function's pc is saved */
return pcRel(ci->u.l.savedpc, ci_func(ci)->l.p);
}
static int currentline (CallInfo *ci) {
int pc = currentpc(ci);
if (pc < 0)
return -1; /* only active lua functions have current-line information */
else
return getline(ci_func(ci)->l.p, pc);
}
void luaG_inithooks (lua_State *L) {
CallInfo *ci;
for (ci = L->ci; ci != L->base_ci; ci--) /* update all `savedpc's */
currentpc(ci);
L->hookinit = 1;
}
/*
** this function can be called asynchronous (e.g. during a signal)
*/
LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
if (func == NULL || mask == 0) { /* turn off hooks? */
mask = 0;
func = NULL;
}
L->hook = func;
L->basehookcount = count;
resethookcount(L);
L->hookmask = cast(lu_byte, mask);
L->hookinit = 0;
return 1;
}
LUA_API lua_Hook lua_gethook (lua_State *L) {
return L->hook;
}
LUA_API int lua_gethookmask (lua_State *L) {
return L->hookmask;
}
LUA_API int lua_gethookcount (lua_State *L) {
return L->basehookcount;
}
LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
int status;
CallInfo *ci;
lua_lock(L);
for (ci = L->ci; level > 0 && ci > L->base_ci; ci--) {
level--;
if (!(ci->state & CI_C)) /* Lua function? */
level -= ci->u.l.tailcalls; /* skip lost tail calls */
}
if (level > 0 || ci == L->base_ci) status = 0; /* there is no such level */
else if (level < 0) { /* level is of a lost tail call */
status = 1;
ar->i_ci = 0;
}
else {
status = 1;
ar->i_ci = ci - L->base_ci;
}
lua_unlock(L);
return status;
}
static Proto *getluaproto (CallInfo *ci) {
return (isLua(ci) ? ci_func(ci)->l.p : NULL);
}
LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
const char *name;
CallInfo *ci;
Proto *fp;
lua_lock(L);
name = NULL;
ci = L->base_ci + ar->i_ci;
fp = getluaproto(ci);
if (fp) { /* is a Lua function? */
name = luaF_getlocalname(fp, n, currentpc(ci));
if (name)
luaA_pushobject(L, ci->base+(n-1)); /* push value */
}
lua_unlock(L);
return name;
}
LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
const char *name;
CallInfo *ci;
Proto *fp;
lua_lock(L);
name = NULL;
ci = L->base_ci + ar->i_ci;
fp = getluaproto(ci);
L->top--; /* pop new value */
if (fp) { /* is a Lua function? */
name = luaF_getlocalname(fp, n, currentpc(ci));
if (!name || name[0] == '(') /* `(' starts private locals */
name = NULL;
else
setobjs2s(ci->base+(n-1), L->top);
}
lua_unlock(L);
return name;
}
static void funcinfo (lua_Debug *ar, StkId func) {
Closure *cl = clvalue(func);
if (cl->c.isC) {
ar->source = "=[C]";
ar->linedefined = -1;
ar->what = "C";
}
else {
ar->source = getstr(cl->l.p->source);
ar->linedefined = cl->l.p->lineDefined;
ar->what = (ar->linedefined == 0) ? "main" : "Lua";
}
luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
}
static const char *travglobals (lua_State *L, const TObject *o) {
Table *g = hvalue(gt(L));
int i = sizenode(g);
while (i--) {
Node *n = gnode(g, i);
if (luaO_rawequalObj(o, gval(n)) && ttisstring(gkey(n)))
return getstr(tsvalue(gkey(n)));
}
return NULL;
}
static void info_tailcall (lua_State *L, lua_Debug *ar) {
ar->name = ar->namewhat = "";
ar->what = "tail";
ar->linedefined = ar->currentline = -1;
ar->source = "=(tail call)";
luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
ar->nups = 0;
setnilvalue(L->top);
}
static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
StkId f, CallInfo *ci) {
int status = 1;
for (; *what; what++) {
switch (*what) {
case 'S': {
funcinfo(ar, f);
break;
}
case 'l': {
ar->currentline = (ci) ? currentline(ci) : -1;
break;
}
case 'u': {
ar->nups = clvalue(f)->c.nupvalues;
break;
}
case 'n': {
ar->namewhat = (ci) ? getfuncname(ci, &ar->name) : NULL;
if (ar->namewhat == NULL) {
/* try to find a global name */
if ((ar->name = travglobals(L, f)) != NULL)
ar->namewhat = "global";
else ar->namewhat = ""; /* not found */
}
break;
}
case 'f': {
setobj2s(L->top, f);
break;
}
default: status = 0; /* invalid option */
}
}
return status;
}
LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
int status = 1;
lua_lock(L);
if (*what == '>') {
StkId f = L->top - 1;
if (!ttisfunction(f))
luaG_runerror(L, "value for `lua_getinfo' is not a function");
status = auxgetinfo(L, what + 1, ar, f, NULL);
L->top--; /* pop function */
}
else if (ar->i_ci != 0) { /* no tail call? */
CallInfo *ci = L->base_ci + ar->i_ci;
lua_assert(ttisfunction(ci->base - 1));
status = auxgetinfo(L, what, ar, ci->base - 1, ci);
}
else
info_tailcall(L, ar);
if (strchr(what, 'f')) incr_top(L);
lua_unlock(L);
return status;
}
/*
** {======================================================
** Symbolic Execution and code checker
** =======================================================
*/
#define check(x) if (!(x)) return 0;
#define checkjump(pt,pc) check(0 <= pc && pc < pt->sizecode)
#define checkreg(pt,reg) check((reg) < (pt)->maxstacksize)
static int precheck (const Proto *pt) {
check(pt->maxstacksize <= MAXSTACK);
check(pt->sizelineinfo == pt->sizecode || pt->sizelineinfo == 0);
lua_assert(pt->numparams+pt->is_vararg <= pt->maxstacksize);
check(GET_OPCODE(pt->code[pt->sizecode-1]) == OP_RETURN);
return 1;
}
static int checkopenop (const Proto *pt, int pc) {
Instruction i = pt->code[pc+1];
switch (GET_OPCODE(i)) {
case OP_CALL:
case OP_TAILCALL:
case OP_RETURN: {
check(GETARG_B(i) == 0);
return 1;
}
case OP_SETLISTO: return 1;
default: return 0; /* invalid instruction after an open call */
}
}
static int checkRK (const Proto *pt, int r) {
return (r < pt->maxstacksize || (r >= MAXSTACK && r-MAXSTACK < pt->sizek));
}
static Instruction luaG_symbexec (const Proto *pt, int lastpc, int reg) {
int pc;
int last; /* stores position of last instruction that changed `reg' */
last = pt->sizecode-1; /* points to final return (a `neutral' instruction) */
check(precheck(pt));
for (pc = 0; pc < lastpc; pc++) {
const Instruction i = pt->code[pc];
OpCode op = GET_OPCODE(i);
int a = GETARG_A(i);
int b = 0;
int c = 0;
checkreg(pt, a);
switch (getOpMode(op)) {
case iABC: {
b = GETARG_B(i);
c = GETARG_C(i);
if (testOpMode(op, OpModeBreg)) {
checkreg(pt, b);
}
else if (testOpMode(op, OpModeBrk))
check(checkRK(pt, b));
if (testOpMode(op, OpModeCrk))
check(checkRK(pt, c));
break;
}
case iABx: {
b = GETARG_Bx(i);
if (testOpMode(op, OpModeK)) check(b < pt->sizek);
break;
}
case iAsBx: {
b = GETARG_sBx(i);
break;
}
}
if (testOpMode(op, OpModesetA)) {
if (a == reg) last = pc; /* change register `a' */
}
if (testOpMode(op, OpModeT)) {
check(pc+2 < pt->sizecode); /* check skip */
check(GET_OPCODE(pt->code[pc+1]) == OP_JMP);
}
switch (op) {
case OP_LOADBOOL: {
check(c == 0 || pc+2 < pt->sizecode); /* check its jump */
break;
}
case OP_LOADNIL: {
if (a <= reg && reg <= b)
last = pc; /* set registers from `a' to `b' */
break;
}
case OP_GETUPVAL:
case OP_SETUPVAL: {
check(b < pt->nups);
break;
}
case OP_GETGLOBAL:
case OP_SETGLOBAL: {
check(ttisstring(&pt->k[b]));
break;
}
case OP_SELF: {
checkreg(pt, a+1);
if (reg == a+1) last = pc;
break;
}
case OP_CONCAT: {
/* `c' is a register, and at least two operands */
check(c < MAXSTACK && b < c);
break;
}
case OP_TFORLOOP:
checkreg(pt, a+c+5);
if (reg >= a) last = pc; /* affect all registers above base */
/* go through */
case OP_FORLOOP:
checkreg(pt, a+2);
/* go through */
case OP_JMP: {
int dest = pc+1+b;
check(0 <= dest && dest < pt->sizecode);
/* not full check and jump is forward and do not skip `lastpc'? */
if (reg != NO_REG && pc < dest && dest <= lastpc)
pc += b; /* do the jump */
break;
}
case OP_CALL:
case OP_TAILCALL: {
if (b != 0) {
checkreg(pt, a+b-1);
}
c--; /* c = num. returns */
if (c == LUA_MULTRET) {
check(checkopenop(pt, pc));
}
else if (c != 0)
checkreg(pt, a+c-1);
if (reg >= a) last = pc; /* affect all registers above base */
break;
}
case OP_RETURN: {
b--; /* b = num. returns */
if (b > 0) checkreg(pt, a+b-1);
break;
}
case OP_SETLIST: {
checkreg(pt, a + (b&(LFIELDS_PER_FLUSH-1)) + 1);
break;
}
case OP_CLOSURE: {
int nup;
check(b < pt->sizep);
nup = pt->p[b]->nups;
check(pc + nup < pt->sizecode);
for (; nup>0; nup--) {
OpCode op1 = GET_OPCODE(pt->code[pc+nup]);
check(op1 == OP_GETUPVAL || op1 == OP_MOVE);
}
break;
}
default: break;
}
}
return pt->code[last];
}
#undef check
#undef checkjump
#undef checkreg
/* }====================================================== */
int luaG_checkcode (const Proto *pt) {
return luaG_symbexec(pt, pt->sizecode, NO_REG);
}
static const char *kname (Proto *p, int c) {
c = c - MAXSTACK;
if (c >= 0 && ttisstring(&p->k[c]))
return svalue(&p->k[c]);
else
return "?";
}
static const char *getobjname (CallInfo *ci, int stackpos, const char **name) {
if (isLua(ci)) { /* a Lua function? */
Proto *p = ci_func(ci)->l.p;
int pc = currentpc(ci);
Instruction i;
*name = luaF_getlocalname(p, stackpos+1, pc);
if (*name) /* is a local? */
return "local";
i = luaG_symbexec(p, pc, stackpos); /* try symbolic execution */
lua_assert(pc != -1);
switch (GET_OPCODE(i)) {
case OP_GETGLOBAL: {
int g = GETARG_Bx(i); /* global index */
lua_assert(ttisstring(&p->k[g]));
*name = svalue(&p->k[g]);
return "global";
}
case OP_MOVE: {
int a = GETARG_A(i);
int b = GETARG_B(i); /* move from `b' to `a' */
if (b < a)
return getobjname(ci, b, name); /* get name for `b' */
break;
}
case OP_GETTABLE: {
int k = GETARG_C(i); /* key index */
*name = kname(p, k);
return "field";
}
case OP_SELF: {
int k = GETARG_C(i); /* key index */
*name = kname(p, k);
return "method";
}
default: break;
}
}
return NULL; /* no useful name found */
}
static const char *getfuncname (CallInfo *ci, const char **name) {
Instruction i;
if ((isLua(ci) && ci->u.l.tailcalls > 0) || !isLua(ci - 1))
return NULL; /* calling function is not Lua (or is unknown) */
ci--; /* calling function */
i = ci_func(ci)->l.p->code[currentpc(ci)];
if (GET_OPCODE(i) == OP_CALL || GET_OPCODE(i) == OP_TAILCALL)
return getobjname(ci, GETARG_A(i), name);
else
return NULL; /* no useful name can be found */
}
/* only ANSI way to check whether a pointer points to an array */
static int isinstack (CallInfo *ci, const TObject *o) {
StkId p;
for (p = ci->base; p < ci->top; p++)
if (o == p) return 1;
return 0;
}
void luaG_typeerror (lua_State *L, const TObject *o, const char *op) {
const char *name = NULL;
const char *t = luaT_typenames[ttype(o)];
const char *kind = (isinstack(L->ci, o)) ?
getobjname(L->ci, o - L->base, &name) : NULL;
if (kind)
luaG_runerror(L, "attempt to %s %s `%s' (a %s value)",
op, kind, name, t);
else
luaG_runerror(L, "attempt to %s a %s value", op, t);
}
void luaG_concaterror (lua_State *L, StkId p1, StkId p2) {
if (ttisstring(p1)) p1 = p2;
lua_assert(!ttisstring(p1));
luaG_typeerror(L, p1, "concatenate");
}
void luaG_aritherror (lua_State *L, const TObject *p1, const TObject *p2) {
TObject temp;
if (luaV_tonumber(p1, &temp) == NULL)
p2 = p1; /* first operand is wrong */
luaG_typeerror(L, p2, "perform arithmetic on");
}
int luaG_ordererror (lua_State *L, const TObject *p1, const TObject *p2) {
const char *t1 = luaT_typenames[ttype(p1)];
const char *t2 = luaT_typenames[ttype(p2)];
if (t1[2] == t2[2])
luaG_runerror(L, "attempt to compare two %s values", t1);
else
luaG_runerror(L, "attempt to compare %s with %s", t1, t2);
return 0;
}
static void addinfo (lua_State *L, const char *msg) {
CallInfo *ci = L->ci;
if (isLua(ci)) { /* is Lua code? */
char buff[LUA_IDSIZE]; /* add file:line information */
int line = currentline(ci);
luaO_chunkid(buff, getstr(getluaproto(ci)->source), LUA_IDSIZE);
luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
}
}
void luaG_errormsg (lua_State *L) {
if (L->errfunc != 0) { /* is there an error handling function? */
StkId errfunc = restorestack(L, L->errfunc);
if (!ttisfunction(errfunc)) luaD_throw(L, LUA_ERRERR);
setobjs2s(L->top, L->top - 1); /* move argument */
setobjs2s(L->top - 1, errfunc); /* push function */
incr_top(L);
luaD_call(L, L->top - 2, 1); /* call it */
}
luaD_throw(L, LUA_ERRRUN);
}
void luaG_runerror (lua_State *L, const char *fmt, ...) {
va_list argp;
va_start(argp, fmt);
addinfo(L, luaO_pushvfstring(L, fmt, argp));
va_end(argp);
luaG_errormsg(L);
}

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/*
** $Id: ldebug.h,v 1.32 2002/11/18 11:01:55 roberto Exp $
** Auxiliary functions from Debug Interface module
** See Copyright Notice in lua.h
*/
#ifndef ldebug_h
#define ldebug_h
#include "lstate.h"
#define pcRel(pc, p) (cast(int, (pc) - (p)->code) - 1)
#define getline(f,pc) (((f)->lineinfo) ? (f)->lineinfo[pc] : 0)
#define resethookcount(L) (L->hookcount = L->basehookcount)
void luaG_inithooks (lua_State *L);
void luaG_typeerror (lua_State *L, const TObject *o, const char *opname);
void luaG_concaterror (lua_State *L, StkId p1, StkId p2);
void luaG_aritherror (lua_State *L, const TObject *p1, const TObject *p2);
int luaG_ordererror (lua_State *L, const TObject *p1, const TObject *p2);
void luaG_runerror (lua_State *L, const char *fmt, ...);
void luaG_errormsg (lua_State *L);
int luaG_checkcode (const Proto *pt);
#endif

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/*
** $Id: ldo.c,v 1.217a 2003/04/03 13:35:34 roberto Exp $
** Stack and Call structure of Lua
** See Copyright Notice in lua.h
*/
#include <setjmp.h>
#include <stdlib.h>
#include <string.h>
#define ldo_c
#include "lua.h"
#include "ldebug.h"
#include "ldo.h"
#include "lfunc.h"
#include "lgc.h"
#include "lmem.h"
#include "lobject.h"
#include "lopcodes.h"
#include "lparser.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "ltm.h"
#include "lundump.h"
#include "lvm.h"
#include "lzio.h"
/*
** {======================================================
** Error-recovery functions (based on long jumps)
** =======================================================
*/
/* chain list of long jump buffers */
struct lua_longjmp {
struct lua_longjmp *previous;
jmp_buf b;
volatile int status; /* error code */
};
static void seterrorobj (lua_State *L, int errcode, StkId oldtop) {
switch (errcode) {
case LUA_ERRMEM: {
setsvalue2s(oldtop, luaS_new(L, MEMERRMSG));
break;
}
case LUA_ERRERR: {
setsvalue2s(oldtop, luaS_new(L, "error in error handling"));
break;
}
case LUA_ERRSYNTAX:
case LUA_ERRRUN: {
setobjs2s(oldtop, L->top - 1); /* error message on current top */
break;
}
}
L->top = oldtop + 1;
}
void luaD_throw (lua_State *L, int errcode) {
if (L->errorJmp) {
L->errorJmp->status = errcode;
longjmp(L->errorJmp->b, 1);
}
else {
G(L)->panic(L);
exit(EXIT_FAILURE);
}
}
int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) {
struct lua_longjmp lj;
lj.status = 0;
lj.previous = L->errorJmp; /* chain new error handler */
L->errorJmp = &lj;
if (setjmp(lj.b) == 0)
(*f)(L, ud);
L->errorJmp = lj.previous; /* restore old error handler */
return lj.status;
}
static void restore_stack_limit (lua_State *L) {
L->stack_last = L->stack+L->stacksize-1;
if (L->size_ci > LUA_MAXCALLS) { /* there was an overflow? */
int inuse = (L->ci - L->base_ci);
if (inuse + 1 < LUA_MAXCALLS) /* can `undo' overflow? */
luaD_reallocCI(L, LUA_MAXCALLS);
}
}
/* }====================================================== */
static void correctstack (lua_State *L, TObject *oldstack) {
CallInfo *ci;
GCObject *up;
L->top = (L->top - oldstack) + L->stack;
for (up = L->openupval; up != NULL; up = up->gch.next)
gcotouv(up)->v = (gcotouv(up)->v - oldstack) + L->stack;
for (ci = L->base_ci; ci <= L->ci; ci++) {
ci->top = (ci->top - oldstack) + L->stack;
ci->base = (ci->base - oldstack) + L->stack;
}
L->base = L->ci->base;
}
void luaD_reallocstack (lua_State *L, int newsize) {
TObject *oldstack = L->stack;
luaM_reallocvector(L, L->stack, L->stacksize, newsize, TObject);
L->stacksize = newsize;
L->stack_last = L->stack+newsize-1-EXTRA_STACK;
correctstack(L, oldstack);
}
void luaD_reallocCI (lua_State *L, int newsize) {
CallInfo *oldci = L->base_ci;
luaM_reallocvector(L, L->base_ci, L->size_ci, newsize, CallInfo);
L->size_ci = cast(unsigned short, newsize);
L->ci = (L->ci - oldci) + L->base_ci;
L->end_ci = L->base_ci + L->size_ci;
}
void luaD_growstack (lua_State *L, int n) {
if (n <= L->stacksize) /* double size is enough? */
luaD_reallocstack(L, 2*L->stacksize);
else
luaD_reallocstack(L, L->stacksize + n + EXTRA_STACK);
}
static void luaD_growCI (lua_State *L) {
if (L->size_ci > LUA_MAXCALLS) /* overflow while handling overflow? */
luaD_throw(L, LUA_ERRERR);
else {
luaD_reallocCI(L, 2*L->size_ci);
if (L->size_ci > LUA_MAXCALLS)
luaG_runerror(L, "stack overflow");
}
}
void luaD_callhook (lua_State *L, int event, int line) {
lua_Hook hook = L->hook;
if (hook && L->allowhook) {
ptrdiff_t top = savestack(L, L->top);
ptrdiff_t ci_top = savestack(L, L->ci->top);
lua_Debug ar;
ar.event = event;
ar.currentline = line;
if (event == LUA_HOOKTAILRET)
ar.i_ci = 0; /* tail call; no debug information about it */
else
ar.i_ci = L->ci - L->base_ci;
luaD_checkstack(L, LUA_MINSTACK); /* ensure minimum stack size */
L->ci->top = L->top + LUA_MINSTACK;
L->allowhook = 0; /* cannot call hooks inside a hook */
lua_unlock(L);
(*hook)(L, &ar);
lua_lock(L);
lua_assert(!L->allowhook);
L->allowhook = 1;
L->ci->top = restorestack(L, ci_top);
L->top = restorestack(L, top);
}
}
static void adjust_varargs (lua_State *L, int nfixargs, StkId base) {
int i;
Table *htab;
TObject nname;
int actual = L->top - base; /* actual number of arguments */
if (actual < nfixargs) {
luaD_checkstack(L, nfixargs - actual);
for (; actual < nfixargs; ++actual)
setnilvalue(L->top++);
}
actual -= nfixargs; /* number of extra arguments */
htab = luaH_new(L, actual, 1); /* create `arg' table */
for (i=0; i<actual; i++) /* put extra arguments into `arg' table */
setobj2n(luaH_setnum(L, htab, i+1), L->top - actual + i);
/* store counter in field `n' */
setsvalue(&nname, luaS_newliteral(L, "n"));
setnvalue(luaH_set(L, htab, &nname), cast(lua_Number, actual));
L->top -= actual; /* remove extra elements from the stack */
sethvalue(L->top, htab);
incr_top(L);
}
static StkId tryfuncTM (lua_State *L, StkId func) {
const TObject *tm = luaT_gettmbyobj(L, func, TM_CALL);
StkId p;
ptrdiff_t funcr = savestack(L, func);
if (!ttisfunction(tm))
luaG_typeerror(L, func, "call");
/* Open a hole inside the stack at `func' */
for (p = L->top; p > func; p--) setobjs2s(p, p-1);
incr_top(L);
func = restorestack(L, funcr); /* previous call may change stack */
setobj2s(func, tm); /* tag method is the new function to be called */
return func;
}
StkId luaD_precall (lua_State *L, StkId func) {
LClosure *cl;
ptrdiff_t funcr = savestack(L, func);
if (!ttisfunction(func)) /* `func' is not a function? */
func = tryfuncTM(L, func); /* check the `function' tag method */
if (L->ci + 1 == L->end_ci) luaD_growCI(L);
else condhardstacktests(luaD_reallocCI(L, L->size_ci));
cl = &clvalue(func)->l;
if (!cl->isC) { /* Lua function? prepare its call */
CallInfo *ci;
Proto *p = cl->p;
if (p->is_vararg) /* varargs? */
adjust_varargs(L, p->numparams, func+1);
luaD_checkstack(L, p->maxstacksize);
ci = ++L->ci; /* now `enter' new function */
L->base = L->ci->base = restorestack(L, funcr) + 1;
ci->top = L->base + p->maxstacksize;
ci->u.l.savedpc = p->code; /* starting point */
ci->u.l.tailcalls = 0;
ci->state = CI_SAVEDPC;
while (L->top < ci->top)
setnilvalue(L->top++);
L->top = ci->top;
return NULL;
}
else { /* if is a C function, call it */
CallInfo *ci;
int n;
luaD_checkstack(L, LUA_MINSTACK); /* ensure minimum stack size */
ci = ++L->ci; /* now `enter' new function */
L->base = L->ci->base = restorestack(L, funcr) + 1;
ci->top = L->top + LUA_MINSTACK;
ci->state = CI_C; /* a C function */
if (L->hookmask & LUA_MASKCALL)
luaD_callhook(L, LUA_HOOKCALL, -1);
lua_unlock(L);
#ifdef LUA_COMPATUPVALUES
lua_pushupvalues(L);
#endif
n = (*clvalue(L->base - 1)->c.f)(L); /* do the actual call */
lua_lock(L);
return L->top - n;
}
}
static StkId callrethooks (lua_State *L, StkId firstResult) {
ptrdiff_t fr = savestack(L, firstResult); /* next call may change stack */
luaD_callhook(L, LUA_HOOKRET, -1);
if (!(L->ci->state & CI_C)) { /* Lua function? */
while (L->ci->u.l.tailcalls--) /* call hook for eventual tail calls */
luaD_callhook(L, LUA_HOOKTAILRET, -1);
}
return restorestack(L, fr);
}
void luaD_poscall (lua_State *L, int wanted, StkId firstResult) {
StkId res;
if (L->hookmask & LUA_MASKRET)
firstResult = callrethooks(L, firstResult);
res = L->base - 1; /* res == final position of 1st result */
L->ci--;
L->base = L->ci->base; /* restore base */
/* move results to correct place */
while (wanted != 0 && firstResult < L->top) {
setobjs2s(res++, firstResult++);
wanted--;
}
while (wanted-- > 0)
setnilvalue(res++);
L->top = res;
}
/*
** Call a function (C or Lua). The function to be called is at *func.
** The arguments are on the stack, right after the function.
** When returns, all the results are on the stack, starting at the original
** function position.
*/
void luaD_call (lua_State *L, StkId func, int nResults) {
StkId firstResult;
lua_assert(!(L->ci->state & CI_CALLING));
if (++L->nCcalls >= LUA_MAXCCALLS) {
if (L->nCcalls == LUA_MAXCCALLS)
luaG_runerror(L, "C stack overflow");
else if (L->nCcalls >= (LUA_MAXCCALLS + (LUA_MAXCCALLS>>3)))
luaD_throw(L, LUA_ERRERR); /* error while handing stack error */
}
firstResult = luaD_precall(L, func);
if (firstResult == NULL) /* is a Lua function? */
firstResult = luaV_execute(L); /* call it */
luaD_poscall(L, nResults, firstResult);
L->nCcalls--;
luaC_checkGC(L);
}
static void resume (lua_State *L, void *ud) {
StkId firstResult;
int nargs = *cast(int *, ud);
CallInfo *ci = L->ci;
if (ci == L->base_ci) { /* no activation record? */
lua_assert(nargs < L->top - L->base);
luaD_precall(L, L->top - (nargs + 1)); /* start coroutine */
}
else { /* inside a yield */
lua_assert(ci->state & CI_YIELD);
if (ci->state & CI_C) { /* `common' yield? */
/* finish interrupted execution of `OP_CALL' */
int nresults;
lua_assert((ci-1)->state & CI_SAVEDPC);
lua_assert(GET_OPCODE(*((ci-1)->u.l.savedpc - 1)) == OP_CALL ||
GET_OPCODE(*((ci-1)->u.l.savedpc - 1)) == OP_TAILCALL);
nresults = GETARG_C(*((ci-1)->u.l.savedpc - 1)) - 1;
luaD_poscall(L, nresults, L->top - nargs); /* complete it */
if (nresults >= 0) L->top = L->ci->top;
}
else { /* yielded inside a hook: just continue its execution */
ci->state &= ~CI_YIELD;
}
}
firstResult = luaV_execute(L);
if (firstResult != NULL) /* return? */
luaD_poscall(L, LUA_MULTRET, firstResult); /* finalize this coroutine */
}
static int resume_error (lua_State *L, const char *msg) {
L->top = L->ci->base;
setsvalue2s(L->top, luaS_new(L, msg));
incr_top(L);
lua_unlock(L);
return LUA_ERRRUN;
}
LUA_API int lua_resume (lua_State *L, int nargs) {
int status;
lu_byte old_allowhooks;
lua_lock(L);
if (L->ci == L->base_ci) {
if (nargs >= L->top - L->base)
return resume_error(L, "cannot resume dead coroutine");
}
else if (!(L->ci->state & CI_YIELD)) /* not inside a yield? */
return resume_error(L, "cannot resume non-suspended coroutine");
old_allowhooks = L->allowhook;
lua_assert(L->errfunc == 0 && L->nCcalls == 0);
status = luaD_rawrunprotected(L, resume, &nargs);
if (status != 0) { /* error? */
L->ci = L->base_ci; /* go back to initial level */
L->base = L->ci->base;
L->nCcalls = 0;
luaF_close(L, L->base); /* close eventual pending closures */
seterrorobj(L, status, L->base);
L->allowhook = old_allowhooks;
restore_stack_limit(L);
}
lua_unlock(L);
return status;
}
LUA_API int lua_yield (lua_State *L, int nresults) {
CallInfo *ci;
lua_lock(L);
ci = L->ci;
if (L->nCcalls > 0)
luaG_runerror(L, "attempt to yield across metamethod/C-call boundary");
if (ci->state & CI_C) { /* usual yield */
if ((ci-1)->state & CI_C)
luaG_runerror(L, "cannot yield a C function");
if (L->top - nresults > L->base) { /* is there garbage in the stack? */
int i;
for (i=0; i<nresults; i++) /* move down results */
setobjs2s(L->base + i, L->top - nresults + i);
L->top = L->base + nresults;
}
} /* else it's an yield inside a hook: nothing to do */
ci->state |= CI_YIELD;
lua_unlock(L);
return -1;
}
int luaD_pcall (lua_State *L, Pfunc func, void *u,
ptrdiff_t old_top, ptrdiff_t ef) {
int status;
unsigned short oldnCcalls = L->nCcalls;
ptrdiff_t old_ci = saveci(L, L->ci);
lu_byte old_allowhooks = L->allowhook;
ptrdiff_t old_errfunc = L->errfunc;
L->errfunc = ef;
status = luaD_rawrunprotected(L, func, u);
if (status != 0) { /* an error occurred? */
StkId oldtop = restorestack(L, old_top);
luaF_close(L, oldtop); /* close eventual pending closures */
seterrorobj(L, status, oldtop);
L->nCcalls = oldnCcalls;
L->ci = restoreci(L, old_ci);
L->base = L->ci->base;
L->allowhook = old_allowhooks;
restore_stack_limit(L);
}
L->errfunc = old_errfunc;
return status;
}
/*
** Execute a protected parser.
*/
struct SParser { /* data to `f_parser' */
ZIO *z;
Mbuffer buff; /* buffer to be used by the scanner */
int bin;
};
static void f_parser (lua_State *L, void *ud) {
struct SParser *p;
Proto *tf;
Closure *cl;
luaC_checkGC(L);
p = cast(struct SParser *, ud);
tf = p->bin ? luaU_undump(L, p->z, &p->buff) : luaY_parser(L, p->z, &p->buff);
cl = luaF_newLclosure(L, 0, gt(L));
cl->l.p = tf;
setclvalue(L->top, cl);
incr_top(L);
}
int luaD_protectedparser (lua_State *L, ZIO *z, int bin) {
struct SParser p;
int status;
ptrdiff_t oldtopr = savestack(L, L->top); /* save current top */
p.z = z; p.bin = bin;
luaZ_initbuffer(L, &p.buff);
status = luaD_rawrunprotected(L, f_parser, &p);
luaZ_freebuffer(L, &p.buff);
if (status != 0) { /* error? */
StkId oldtop = restorestack(L, oldtopr);
seterrorobj(L, status, oldtop);
}
return status;
}

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/*
** $Id: ldo.h,v 1.56 2002/12/04 17:29:32 roberto Exp $
** Stack and Call structure of Lua
** See Copyright Notice in lua.h
*/
#ifndef ldo_h
#define ldo_h
#include "lobject.h"
#include "lstate.h"
#include "lzio.h"
/*
** macro to control inclusion of some hard tests on stack reallocation
*/
#ifndef HARDSTACKTESTS
#define condhardstacktests(x) { /* empty */ }
#else
#define condhardstacktests(x) x
#endif
#define luaD_checkstack(L,n) \
if ((char *)L->stack_last - (char *)L->top <= (n)*(int)sizeof(TObject)) \
luaD_growstack(L, n); \
else condhardstacktests(luaD_reallocstack(L, L->stacksize));
#define incr_top(L) {luaD_checkstack(L,1); L->top++;}
#define savestack(L,p) ((char *)(p) - (char *)L->stack)
#define restorestack(L,n) ((TObject *)((char *)L->stack + (n)))
#define saveci(L,p) ((char *)(p) - (char *)L->base_ci)
#define restoreci(L,n) ((CallInfo *)((char *)L->base_ci + (n)))
/* type of protected functions, to be ran by `runprotected' */
typedef void (*Pfunc) (lua_State *L, void *ud);
void luaD_resetprotection (lua_State *L);
int luaD_protectedparser (lua_State *L, ZIO *z, int bin);
void luaD_callhook (lua_State *L, int event, int line);
StkId luaD_precall (lua_State *L, StkId func);
void luaD_call (lua_State *L, StkId func, int nResults);
int luaD_pcall (lua_State *L, Pfunc func, void *u,
ptrdiff_t oldtop, ptrdiff_t ef);
void luaD_poscall (lua_State *L, int wanted, StkId firstResult);
void luaD_reallocCI (lua_State *L, int newsize);
void luaD_reallocstack (lua_State *L, int newsize);
void luaD_growstack (lua_State *L, int n);
void luaD_throw (lua_State *L, int errcode);
int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud);
#endif

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/*
** $Id: ldump.c,v 1.4 2003/02/11 23:52:12 lhf Exp $
** save bytecodes
** See Copyright Notice in lua.h
*/
#include <stddef.h>
#define ldump_c
#include "lua.h"
#include "lobject.h"
#include "lopcodes.h"
#include "lstate.h"
#include "lundump.h"
#define DumpVector(b,n,size,D) DumpBlock(b,(n)*(size),D)
#define DumpLiteral(s,D) DumpBlock("" s,(sizeof(s))-1,D)
typedef struct {
lua_State* L;
lua_Chunkwriter write;
void* data;
} DumpState;
static void DumpBlock(const void* b, size_t size, DumpState* D)
{
lua_unlock(D->L);
(*D->write)(D->L,b,size,D->data);
lua_lock(D->L);
}
static void DumpByte(int y, DumpState* D)
{
char x=(char)y;
DumpBlock(&x,sizeof(x),D);
}
static void DumpInt(int x, DumpState* D)
{
DumpBlock(&x,sizeof(x),D);
}
static void DumpSize(size_t x, DumpState* D)
{
DumpBlock(&x,sizeof(x),D);
}
static void DumpNumber(lua_Number x, DumpState* D)
{
DumpBlock(&x,sizeof(x),D);
}
static void DumpString(TString* s, DumpState* D)
{
if (s==NULL || getstr(s)==NULL)
DumpSize(0,D);
else
{
size_t size=s->tsv.len+1; /* include trailing '\0' */
DumpSize(size,D);
DumpBlock(getstr(s),size,D);
}
}
static void DumpCode(const Proto* f, DumpState* D)
{
DumpInt(f->sizecode,D);
DumpVector(f->code,f->sizecode,sizeof(*f->code),D);
}
static void DumpLocals(const Proto* f, DumpState* D)
{
int i,n=f->sizelocvars;
DumpInt(n,D);
for (i=0; i<n; i++)
{
DumpString(f->locvars[i].varname,D);
DumpInt(f->locvars[i].startpc,D);
DumpInt(f->locvars[i].endpc,D);
}
}
static void DumpLines(const Proto* f, DumpState* D)
{
DumpInt(f->sizelineinfo,D);
DumpVector(f->lineinfo,f->sizelineinfo,sizeof(*f->lineinfo),D);
}
static void DumpUpvalues(const Proto* f, DumpState* D)
{
int i,n=f->sizeupvalues;
DumpInt(n,D);
for (i=0; i<n; i++) DumpString(f->upvalues[i],D);
}
static void DumpFunction(const Proto* f, const TString* p, DumpState* D);
static void DumpConstants(const Proto* f, DumpState* D)
{
int i,n;
DumpInt(n=f->sizek,D);
for (i=0; i<n; i++)
{
const TObject* o=&f->k[i];
DumpByte(ttype(o),D);
switch (ttype(o))
{
case LUA_TNUMBER:
DumpNumber(nvalue(o),D);
break;
case LUA_TSTRING:
DumpString(tsvalue(o),D);
break;
case LUA_TNIL:
break;
default:
lua_assert(0); /* cannot happen */
break;
}
}
DumpInt(n=f->sizep,D);
for (i=0; i<n; i++) DumpFunction(f->p[i],f->source,D);
}
static void DumpFunction(const Proto* f, const TString* p, DumpState* D)
{
DumpString((f->source==p) ? NULL : f->source,D);
DumpInt(f->lineDefined,D);
DumpByte(f->nups,D);
DumpByte(f->numparams,D);
DumpByte(f->is_vararg,D);
DumpByte(f->maxstacksize,D);
DumpLines(f,D);
DumpLocals(f,D);
DumpUpvalues(f,D);
DumpConstants(f,D);
DumpCode(f,D);
}
static void DumpHeader(DumpState* D)
{
DumpLiteral(LUA_SIGNATURE,D);
DumpByte(VERSION,D);
DumpByte(luaU_endianness(),D);
DumpByte(sizeof(int),D);
DumpByte(sizeof(size_t),D);
DumpByte(sizeof(Instruction),D);
DumpByte(SIZE_OP,D);
DumpByte(SIZE_A,D);
DumpByte(SIZE_B,D);
DumpByte(SIZE_C,D);
DumpByte(sizeof(lua_Number),D);
DumpNumber(TEST_NUMBER,D);
}
/*
** dump function as precompiled chunk
*/
void luaU_dump (lua_State* L, const Proto* Main, lua_Chunkwriter w, void* data)
{
DumpState D;
D.L=L;
D.write=w;
D.data=data;
DumpHeader(&D);
DumpFunction(Main,NULL,&D);
}

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/*
** $Id: lfunc.c,v 1.67a 2003/03/18 12:50:04 roberto Exp $
** Auxiliary functions to manipulate prototypes and closures
** See Copyright Notice in lua.h
*/
#include <stdlib.h>
#define lfunc_c
#include "lua.h"
#include "lfunc.h"
#include "lgc.h"
#include "lmem.h"
#include "lobject.h"
#include "lstate.h"
Closure *luaF_newCclosure (lua_State *L, int nelems) {
Closure *c = cast(Closure *, luaM_malloc(L, sizeCclosure(nelems)));
luaC_link(L, valtogco(c), LUA_TFUNCTION);
c->c.isC = 1;
c->c.nupvalues = cast(lu_byte, nelems);
return c;
}
Closure *luaF_newLclosure (lua_State *L, int nelems, TObject *e) {
Closure *c = cast(Closure *, luaM_malloc(L, sizeLclosure(nelems)));
luaC_link(L, valtogco(c), LUA_TFUNCTION);
c->l.isC = 0;
c->l.g = *e;
c->l.nupvalues = cast(lu_byte, nelems);
return c;
}
UpVal *luaF_findupval (lua_State *L, StkId level) {
GCObject **pp = &L->openupval;
UpVal *p;
UpVal *v;
while ((p = ngcotouv(*pp)) != NULL && p->v >= level) {
if (p->v == level) return p;
pp = &p->next;
}
v = luaM_new(L, UpVal); /* not found: create a new one */
v->tt = LUA_TUPVAL;
v->marked = 1; /* open upvalues should not be collected */
v->v = level; /* current value lives in the stack */
v->next = *pp; /* chain it in the proper position */
*pp = valtogco(v);
return v;
}
void luaF_close (lua_State *L, StkId level) {
UpVal *p;
while ((p = ngcotouv(L->openupval)) != NULL && p->v >= level) {
setobj(&p->value, p->v); /* save current value (write barrier) */
p->v = &p->value; /* now current value lives here */
L->openupval = p->next; /* remove from `open' list */
luaC_link(L, valtogco(p), LUA_TUPVAL);
}
}
Proto *luaF_newproto (lua_State *L) {
Proto *f = luaM_new(L, Proto);
luaC_link(L, valtogco(f), LUA_TPROTO);
f->k = NULL;
f->sizek = 0;
f->p = NULL;
f->sizep = 0;
f->code = NULL;
f->sizecode = 0;
f->sizelineinfo = 0;
f->sizeupvalues = 0;
f->nups = 0;
f->upvalues = NULL;
f->numparams = 0;
f->is_vararg = 0;
f->maxstacksize = 0;
f->lineinfo = NULL;
f->sizelocvars = 0;
f->locvars = NULL;
f->lineDefined = 0;
f->source = NULL;
return f;
}
void luaF_freeproto (lua_State *L, Proto *f) {
luaM_freearray(L, f->code, f->sizecode, Instruction);
luaM_freearray(L, f->p, f->sizep, Proto *);
luaM_freearray(L, f->k, f->sizek, TObject);
luaM_freearray(L, f->lineinfo, f->sizelineinfo, int);
luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar);
luaM_freearray(L, f->upvalues, f->sizeupvalues, TString *);
luaM_freelem(L, f);
}
void luaF_freeclosure (lua_State *L, Closure *c) {
int size = (c->c.isC) ? sizeCclosure(c->c.nupvalues) :
sizeLclosure(c->l.nupvalues);
luaM_free(L, c, size);
}
/*
** Look for n-th local variable at line `line' in function `func'.
** Returns NULL if not found.
*/
const char *luaF_getlocalname (const Proto *f, int local_number, int pc) {
int i;
for (i = 0; i<f->sizelocvars && f->locvars[i].startpc <= pc; i++) {
if (pc < f->locvars[i].endpc) { /* is variable active? */
local_number--;
if (local_number == 0)
return getstr(f->locvars[i].varname);
}
}
return NULL; /* not found */
}

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/*
** $Id: lfunc.h,v 1.21a 2003/03/18 12:50:04 roberto Exp $
** Auxiliary functions to manipulate prototypes and closures
** See Copyright Notice in lua.h
*/
#ifndef lfunc_h
#define lfunc_h
#include "lobject.h"
#define sizeCclosure(n) (cast(int, sizeof(CClosure)) + \
cast(int, sizeof(TObject)*((n)-1)))
#define sizeLclosure(n) (cast(int, sizeof(LClosure)) + \
cast(int, sizeof(TObject *)*((n)-1)))
Proto *luaF_newproto (lua_State *L);
Closure *luaF_newCclosure (lua_State *L, int nelems);
Closure *luaF_newLclosure (lua_State *L, int nelems, TObject *e);
UpVal *luaF_findupval (lua_State *L, StkId level);
void luaF_close (lua_State *L, StkId level);
void luaF_freeproto (lua_State *L, Proto *f);
void luaF_freeclosure (lua_State *L, Closure *c);
const char *luaF_getlocalname (const Proto *func, int local_number, int pc);
#endif

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/*
** $Id: lgc.c,v 1.171b 2003/04/03 13:35:34 roberto Exp $
** Garbage Collector
** See Copyright Notice in lua.h
*/
#include <string.h>
#define lgc_c
#include "lua.h"
#include "ldebug.h"
#include "ldo.h"
#include "lfunc.h"
#include "lgc.h"
#include "lmem.h"
#include "lobject.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "ltm.h"
typedef struct GCState {
GCObject *tmark; /* list of marked objects to be traversed */
GCObject *wk; /* list of traversed key-weak tables (to be cleared) */
GCObject *wv; /* list of traversed value-weak tables */
GCObject *wkv; /* list of traversed key-value weak tables */
global_State *g;
} GCState;
/*
** some userful bit tricks
*/
#define setbit(x,b) ((x) |= (1<<(b)))
#define resetbit(x,b) ((x) &= cast(lu_byte, ~(1<<(b))))
#define testbit(x,b) ((x) & (1<<(b)))
#define unmark(x) resetbit((x)->gch.marked, 0)
#define ismarked(x) ((x)->gch.marked & ((1<<4)|1))
#define stringmark(s) setbit((s)->tsv.marked, 0)
#define isfinalized(u) (!testbit((u)->uv.marked, 1))
#define markfinalized(u) resetbit((u)->uv.marked, 1)
#define KEYWEAKBIT 1
#define VALUEWEAKBIT 2
#define KEYWEAK (1<<KEYWEAKBIT)
#define VALUEWEAK (1<<VALUEWEAKBIT)
#define markobject(st,o) { checkconsistency(o); \
if (iscollectable(o) && !ismarked(gcvalue(o))) reallymarkobject(st,gcvalue(o)); }
#define condmarkobject(st,o,c) { checkconsistency(o); \
if (iscollectable(o) && !ismarked(gcvalue(o)) && (c)) \
reallymarkobject(st,gcvalue(o)); }
#define markvalue(st,t) { if (!ismarked(valtogco(t))) \
reallymarkobject(st, valtogco(t)); }
static void reallymarkobject (GCState *st, GCObject *o) {
lua_assert(!ismarked(o));
setbit(o->gch.marked, 0); /* mark object */
switch (o->gch.tt) {
case LUA_TUSERDATA: {
markvalue(st, gcotou(o)->uv.metatable);
break;
}
case LUA_TFUNCTION: {
gcotocl(o)->c.gclist = st->tmark;
st->tmark = o;
break;
}
case LUA_TTABLE: {
gcotoh(o)->gclist = st->tmark;
st->tmark = o;
break;
}
case LUA_TTHREAD: {
gcototh(o)->gclist = st->tmark;
st->tmark = o;
break;
}
case LUA_TPROTO: {
gcotop(o)->gclist = st->tmark;
st->tmark = o;
break;
}
default: lua_assert(o->gch.tt == LUA_TSTRING);
}
}
static void marktmu (GCState *st) {
GCObject *u;
for (u = st->g->tmudata; u; u = u->gch.next) {
unmark(u); /* may be marked, if left from previous GC */
reallymarkobject(st, u);
}
}
/* move `dead' udata that need finalization to list `tmudata' */
size_t luaC_separateudata (lua_State *L) {
size_t deadmem = 0;
GCObject **p = &G(L)->rootudata;
GCObject *curr;
GCObject *collected = NULL; /* to collect udata with gc event */
GCObject **lastcollected = &collected;
while ((curr = *p) != NULL) {
lua_assert(curr->gch.tt == LUA_TUSERDATA);
if (ismarked(curr) || isfinalized(gcotou(curr)))
p = &curr->gch.next; /* don't bother with them */
else if (fasttm(L, gcotou(curr)->uv.metatable, TM_GC) == NULL) {
markfinalized(gcotou(curr)); /* don't need finalization */
p = &curr->gch.next;
}
else { /* must call its gc method */
deadmem += sizeudata(gcotou(curr)->uv.len);
*p = curr->gch.next;
curr->gch.next = NULL; /* link `curr' at the end of `collected' list */
*lastcollected = curr;
lastcollected = &curr->gch.next;
}
}
/* insert collected udata with gc event into `tmudata' list */
*lastcollected = G(L)->tmudata;
G(L)->tmudata = collected;
return deadmem;
}
static void removekey (Node *n) {
setnilvalue(gval(n)); /* remove corresponding value ... */
if (iscollectable(gkey(n)))
setttype(gkey(n), LUA_TNONE); /* dead key; remove it */
}
static void traversetable (GCState *st, Table *h) {
int i;
int weakkey = 0;
int weakvalue = 0;
const TObject *mode;
markvalue(st, h->metatable);
lua_assert(h->lsizenode || h->node == st->g->dummynode);
mode = gfasttm(st->g, h->metatable, TM_MODE);
if (mode && ttisstring(mode)) { /* is there a weak mode? */
weakkey = (strchr(svalue(mode), 'k') != NULL);
weakvalue = (strchr(svalue(mode), 'v') != NULL);
if (weakkey || weakvalue) { /* is really weak? */
GCObject **weaklist;
h->marked &= ~(KEYWEAK | VALUEWEAK); /* clear bits */
h->marked |= cast(lu_byte, (weakkey << KEYWEAKBIT) |
(weakvalue << VALUEWEAKBIT));
weaklist = (weakkey && weakvalue) ? &st->wkv :
(weakkey) ? &st->wk :
&st->wv;
h->gclist = *weaklist; /* must be cleared after GC, ... */
*weaklist = valtogco(h); /* ... so put in the appropriate list */
}
}
if (!weakvalue) {
i = h->sizearray;
while (i--)
markobject(st, &h->array[i]);
}
i = sizenode(h);
while (i--) {
Node *n = gnode(h, i);
if (!ttisnil(gval(n))) {
lua_assert(!ttisnil(gkey(n)));
condmarkobject(st, gkey(n), !weakkey);
condmarkobject(st, gval(n), !weakvalue);
}
}
}
static void traverseproto (GCState *st, Proto *f) {
int i;
stringmark(f->source);
for (i=0; i<f->sizek; i++) { /* mark literal strings */
if (ttisstring(f->k+i))
stringmark(tsvalue(f->k+i));
}
for (i=0; i<f->sizeupvalues; i++) /* mark upvalue names */
stringmark(f->upvalues[i]);
for (i=0; i<f->sizep; i++) /* mark nested protos */
markvalue(st, f->p[i]);
for (i=0; i<f->sizelocvars; i++) /* mark local-variable names */
stringmark(f->locvars[i].varname);
lua_assert(luaG_checkcode(f));
}
static void traverseclosure (GCState *st, Closure *cl) {
if (cl->c.isC) {
int i;
for (i=0; i<cl->c.nupvalues; i++) /* mark its upvalues */
markobject(st, &cl->c.upvalue[i]);
}
else {
int i;
lua_assert(cl->l.nupvalues == cl->l.p->nups);
markvalue(st, hvalue(&cl->l.g));
markvalue(st, cl->l.p);
for (i=0; i<cl->l.nupvalues; i++) { /* mark its upvalues */
UpVal *u = cl->l.upvals[i];
markobject(st, u->v);
u->marked = 1;
}
}
}
static void checkstacksizes (lua_State *L, StkId max) {
int used = L->ci - L->base_ci; /* number of `ci' in use */
if (4*used < L->size_ci && 2*BASIC_CI_SIZE < L->size_ci)
luaD_reallocCI(L, L->size_ci/2); /* still big enough... */
else condhardstacktests(luaD_reallocCI(L, L->size_ci));
used = max - L->stack; /* part of stack in use */
if (4*used < L->stacksize && 2*(BASIC_STACK_SIZE+EXTRA_STACK) < L->stacksize)
luaD_reallocstack(L, L->stacksize/2); /* still big enough... */
else condhardstacktests(luaD_reallocstack(L, L->stacksize));
}
static void traversestack (GCState *st, lua_State *L1) {
StkId o, lim;
CallInfo *ci;
markobject(st, gt(L1));
lim = L1->top;
for (ci = L1->base_ci; ci <= L1->ci; ci++) {
lua_assert(ci->top <= L1->stack_last);
lua_assert(ci->state & (CI_C | CI_HASFRAME | CI_SAVEDPC));
if (lim < ci->top)
lim = ci->top;
}
for (o = L1->stack; o < L1->top; o++)
markobject(st, o);
for (; o <= lim; o++)
setnilvalue(o);
checkstacksizes(L1, lim);
}
static lu_mem propagatemarks (GCState *st) {
lu_mem mf = 0;
while (st->tmark) { /* traverse marked objects */
switch (st->tmark->gch.tt) {
case LUA_TTABLE: {
Table *h = gcotoh(st->tmark);
st->tmark = h->gclist;
traversetable(st, h);
mf += sizeof(Table) + sizeof(TObject) * h->sizearray +
sizeof(Node) * sizenode(h);
break;
}
case LUA_TFUNCTION: {
Closure *cl = gcotocl(st->tmark);
st->tmark = cl->c.gclist;
traverseclosure(st, cl);
mf += (cl->c.isC) ? sizeCclosure(cl->c.nupvalues) :
sizeLclosure(cl->l.nupvalues);
break;
}
case LUA_TTHREAD: {
lua_State *th = gcototh(st->tmark);
st->tmark = th->gclist;
traversestack(st, th);
mf += sizeof(lua_State) + sizeof(TObject) * th->stacksize +
sizeof(CallInfo) * th->size_ci;
break;
}
case LUA_TPROTO: {
Proto *p = gcotop(st->tmark);
st->tmark = p->gclist;
traverseproto(st, p);
/* do not need 'mf' for this case (cannot happen inside a udata) */
break;
}
default: lua_assert(0);
}
}
return mf;
}
static int valismarked (const TObject *o) {
if (ttisstring(o))
stringmark(tsvalue(o)); /* strings are `values', so are never weak */
return !iscollectable(o) || testbit(o->value.gc->gch.marked, 0);
}
/*
** clear collected keys from weaktables
*/
static void cleartablekeys (GCObject *l) {
while (l) {
Table *h = gcotoh(l);
int i = sizenode(h);
lua_assert(h->marked & KEYWEAK);
while (i--) {
Node *n = gnode(h, i);
if (!valismarked(gkey(n))) /* key was collected? */
removekey(n); /* remove entry from table */
}
l = h->gclist;
}
}
/*
** clear collected values from weaktables
*/
static void cleartablevalues (GCObject *l) {
while (l) {
Table *h = gcotoh(l);
int i = h->sizearray;
lua_assert(h->marked & VALUEWEAK);
while (i--) {
TObject *o = &h->array[i];
if (!valismarked(o)) /* value was collected? */
setnilvalue(o); /* remove value */
}
i = sizenode(h);
while (i--) {
Node *n = gnode(h, i);
if (!valismarked(gval(n))) /* value was collected? */
removekey(n); /* remove entry from table */
}
l = h->gclist;
}
}
static void freeobj (lua_State *L, GCObject *o) {
switch (o->gch.tt) {
case LUA_TPROTO: luaF_freeproto(L, gcotop(o)); break;
case LUA_TFUNCTION: luaF_freeclosure(L, gcotocl(o)); break;
case LUA_TUPVAL: luaM_freelem(L, gcotouv(o)); break;
case LUA_TTABLE: luaH_free(L, gcotoh(o)); break;
case LUA_TTHREAD: {
lua_assert(gcototh(o) != L && gcototh(o) != G(L)->mainthread);
luaE_freethread(L, gcototh(o));
break;
}
case LUA_TSTRING: {
luaM_free(L, o, sizestring(gcotots(o)->tsv.len));
break;
}
case LUA_TUSERDATA: {
luaM_free(L, o, sizeudata(gcotou(o)->uv.len));
break;
}
default: lua_assert(0);
}
}
static int sweeplist (lua_State *L, GCObject **p, int limit) {
GCObject *curr;
int count = 0; /* number of collected items */
while ((curr = *p) != NULL) {
if ((curr->gch.marked & ~(KEYWEAK | VALUEWEAK)) > limit) {
unmark(curr);
p = &curr->gch.next;
}
else {
count++;
*p = curr->gch.next;
freeobj(L, curr);
}
}
return count;
}
static void sweepstrings (lua_State *L, int all) {
int i;
for (i=0; i<G(L)->strt.size; i++) { /* for each list */
G(L)->strt.nuse -= sweeplist(L, &G(L)->strt.hash[i], all);
}
}
static void checkSizes (lua_State *L, size_t deadmem) {
/* check size of string hash */
if (G(L)->strt.nuse < cast(ls_nstr, G(L)->strt.size/4) &&
G(L)->strt.size > MINSTRTABSIZE*2)
luaS_resize(L, G(L)->strt.size/2); /* table is too big */
/* check size of buffer */
if (luaZ_sizebuffer(&G(L)->buff) > LUA_MINBUFFER*2) { /* buffer too big? */
size_t newsize = luaZ_sizebuffer(&G(L)->buff) / 2;
luaZ_resizebuffer(L, &G(L)->buff, newsize);
}
G(L)->GCthreshold = 2*G(L)->nblocks - deadmem; /* new threshold */
}
static void do1gcTM (lua_State *L, Udata *udata) {
const TObject *tm = fasttm(L, udata->uv.metatable, TM_GC);
if (tm != NULL) {
setobj2s(L->top, tm);
setuvalue(L->top+1, udata);
L->top += 2;
luaD_call(L, L->top - 2, 0);
}
}
void luaC_callGCTM (lua_State *L) {
lu_byte oldah = L->allowhook;
L->allowhook = 0; /* stop debug hooks during GC tag methods */
L->top++; /* reserve space to keep udata while runs its gc method */
while (G(L)->tmudata != NULL) {
GCObject *o = G(L)->tmudata;
Udata *udata = gcotou(o);
G(L)->tmudata = udata->uv.next; /* remove udata from `tmudata' */
udata->uv.next = G(L)->rootudata; /* return it to `root' list */
G(L)->rootudata = o;
setuvalue(L->top - 1, udata); /* keep a reference to it */
unmark(o);
markfinalized(udata);
do1gcTM(L, udata);
}
L->top--;
L->allowhook = oldah; /* restore hooks */
}
void luaC_sweep (lua_State *L, int all) {
if (all) all = 256; /* larger than any mark */
sweeplist(L, &G(L)->rootudata, all);
sweepstrings(L, all);
sweeplist(L, &G(L)->rootgc, all);
}
/* mark root set */
static void markroot (GCState *st, lua_State *L) {
global_State *g = st->g;
markobject(st, defaultmeta(L));
markobject(st, registry(L));
traversestack(st, g->mainthread);
if (L != g->mainthread) /* another thread is running? */
markvalue(st, L); /* cannot collect it */
}
static size_t mark (lua_State *L) {
size_t deadmem;
GCState st;
GCObject *wkv;
st.g = G(L);
st.tmark = NULL;
st.wkv = st.wk = st.wv = NULL;
markroot(&st, L);
propagatemarks(&st); /* mark all reachable objects */
cleartablevalues(st.wkv);
cleartablevalues(st.wv);
wkv = st.wkv; /* keys must be cleared after preserving udata */
st.wkv = NULL;
st.wv = NULL;
deadmem = luaC_separateudata(L); /* separate userdata to be preserved */
marktmu(&st); /* mark `preserved' userdata */
deadmem += propagatemarks(&st); /* remark, to propagate `preserveness' */
cleartablekeys(wkv);
/* `propagatemarks' may resuscitate some weak tables; clear them too */
cleartablekeys(st.wk);
cleartablevalues(st.wv);
cleartablekeys(st.wkv);
cleartablevalues(st.wkv);
return deadmem;
}
void luaC_collectgarbage (lua_State *L) {
size_t deadmem = mark(L);
luaC_sweep(L, 0);
checkSizes(L, deadmem);
luaC_callGCTM(L);
}
void luaC_link (lua_State *L, GCObject *o, lu_byte tt) {
o->gch.next = G(L)->rootgc;
G(L)->rootgc = o;
o->gch.marked = 0;
o->gch.tt = tt;
}

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auto3/lua/src/lgc.h Normal file
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/*
** $Id: lgc.h,v 1.19a 2003/02/28 19:45:15 roberto Exp $
** Garbage Collector
** See Copyright Notice in lua.h
*/
#ifndef lgc_h
#define lgc_h
#include "lobject.h"
#define luaC_checkGC(L) { lua_assert(!(L->ci->state & CI_CALLING)); \
if (G(L)->nblocks >= G(L)->GCthreshold) luaC_collectgarbage(L); }
size_t luaC_separateudata (lua_State *L);
void luaC_callGCTM (lua_State *L);
void luaC_sweep (lua_State *L, int all);
void luaC_collectgarbage (lua_State *L);
void luaC_link (lua_State *L, GCObject *o, lu_byte tt);
#endif

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auto3/lua/src/lib/lauxlib.c Normal file
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/*
** $Id: lauxlib.c,v 1.100 2003/04/07 14:35:00 roberto Exp $
** Auxiliary functions for building Lua libraries
** See Copyright Notice in lua.h
*/
#include <ctype.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
/* This file uses only the official API of Lua.
** Any function declared here could be written as an application function.
*/
#define lauxlib_c
#include "lua.h"
#include "lauxlib.h"
/* number of prereserved references (for internal use) */
#define RESERVED_REFS 2
/* reserved references */
#define FREELIST_REF 1 /* free list of references */
#define ARRAYSIZE_REF 2 /* array sizes */
/* convert a stack index to positive */
#define abs_index(L, i) ((i) > 0 || (i) <= LUA_REGISTRYINDEX ? (i) : \
lua_gettop(L) + (i) + 1)
/*
** {======================================================
** Error-report functions
** =======================================================
*/
LUALIB_API int luaL_argerror (lua_State *L, int narg, const char *extramsg) {
lua_Debug ar;
lua_getstack(L, 0, &ar);
lua_getinfo(L, "n", &ar);
if (strcmp(ar.namewhat, "method") == 0) {
narg--; /* do not count `self' */
if (narg == 0) /* error is in the self argument itself? */
return luaL_error(L, "calling `%s' on bad self (%s)", ar.name, extramsg);
}
if (ar.name == NULL)
ar.name = "?";
return luaL_error(L, "bad argument #%d to `%s' (%s)",
narg, ar.name, extramsg);
}
LUALIB_API int luaL_typerror (lua_State *L, int narg, const char *tname) {
const char *msg = lua_pushfstring(L, "%s expected, got %s",
tname, lua_typename(L, lua_type(L,narg)));
return luaL_argerror(L, narg, msg);
}
static void tag_error (lua_State *L, int narg, int tag) {
luaL_typerror(L, narg, lua_typename(L, tag));
}
LUALIB_API void luaL_where (lua_State *L, int level) {
lua_Debug ar;
if (lua_getstack(L, level, &ar)) { /* check function at level */
lua_getinfo(L, "Snl", &ar); /* get info about it */
if (ar.currentline > 0) { /* is there info? */
lua_pushfstring(L, "%s:%d: ", ar.short_src, ar.currentline);
return;
}
}
lua_pushliteral(L, ""); /* else, no information available... */
}
LUALIB_API int luaL_error (lua_State *L, const char *fmt, ...) {
va_list argp;
va_start(argp, fmt);
luaL_where(L, 1);
lua_pushvfstring(L, fmt, argp);
va_end(argp);
lua_concat(L, 2);
return lua_error(L);
}
/* }====================================================== */
LUALIB_API int luaL_findstring (const char *name, const char *const list[]) {
int i;
for (i=0; list[i]; i++)
if (strcmp(list[i], name) == 0)
return i;
return -1; /* name not found */
}
LUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) {
lua_pushstring(L, tname);
lua_rawget(L, LUA_REGISTRYINDEX); /* get registry.name */
if (!lua_isnil(L, -1)) /* name already in use? */
return 0; /* leave previous value on top, but return 0 */
lua_pop(L, 1);
lua_newtable(L); /* create metatable */
lua_pushstring(L, tname);
lua_pushvalue(L, -2);
lua_rawset(L, LUA_REGISTRYINDEX); /* registry.name = metatable */
lua_pushvalue(L, -1);
lua_pushstring(L, tname);
lua_rawset(L, LUA_REGISTRYINDEX); /* registry[metatable] = name */
return 1;
}
LUALIB_API void luaL_getmetatable (lua_State *L, const char *tname) {
lua_pushstring(L, tname);
lua_rawget(L, LUA_REGISTRYINDEX);
}
LUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname) {
const char *tn;
if (!lua_getmetatable(L, ud)) return NULL; /* no metatable? */
lua_rawget(L, LUA_REGISTRYINDEX); /* get registry[metatable] */
tn = lua_tostring(L, -1);
if (tn && (strcmp(tn, tname) == 0)) {
lua_pop(L, 1);
return lua_touserdata(L, ud);
}
else {
lua_pop(L, 1);
return NULL;
}
}
LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *mes) {
if (!lua_checkstack(L, space))
luaL_error(L, "stack overflow (%s)", mes);
}
LUALIB_API void luaL_checktype (lua_State *L, int narg, int t) {
if (lua_type(L, narg) != t)
tag_error(L, narg, t);
}
LUALIB_API void luaL_checkany (lua_State *L, int narg) {
if (lua_type(L, narg) == LUA_TNONE)
luaL_argerror(L, narg, "value expected");
}
LUALIB_API const char *luaL_checklstring (lua_State *L, int narg, size_t *len) {
const char *s = lua_tostring(L, narg);
if (!s) tag_error(L, narg, LUA_TSTRING);
if (len) *len = lua_strlen(L, narg);
return s;
}
LUALIB_API const char *luaL_optlstring (lua_State *L, int narg,
const char *def, size_t *len) {
if (lua_isnoneornil(L, narg)) {
if (len)
*len = (def ? strlen(def) : 0);
return def;
}
else return luaL_checklstring(L, narg, len);
}
LUALIB_API lua_Number luaL_checknumber (lua_State *L, int narg) {
lua_Number d = lua_tonumber(L, narg);
if (d == 0 && !lua_isnumber(L, narg)) /* avoid extra test when d is not 0 */
tag_error(L, narg, LUA_TNUMBER);
return d;
}
LUALIB_API lua_Number luaL_optnumber (lua_State *L, int narg, lua_Number def) {
if (lua_isnoneornil(L, narg)) return def;
else return luaL_checknumber(L, narg);
}
LUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *event) {
if (!lua_getmetatable(L, obj)) /* no metatable? */
return 0;
lua_pushstring(L, event);
lua_rawget(L, -2);
if (lua_isnil(L, -1)) {
lua_pop(L, 2); /* remove metatable and metafield */
return 0;
}
else {
lua_remove(L, -2); /* remove only metatable */
return 1;
}
}
LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) {
obj = abs_index(L, obj);
if (!luaL_getmetafield(L, obj, event)) /* no metafield? */
return 0;
lua_pushvalue(L, obj);
lua_call(L, 1, 1);
return 1;
}
LUALIB_API void luaL_openlib (lua_State *L, const char *libname,
const luaL_reg *l, int nup) {
if (libname) {
lua_pushstring(L, libname);
lua_gettable(L, LUA_GLOBALSINDEX); /* check whether lib already exists */
if (lua_isnil(L, -1)) { /* no? */
lua_pop(L, 1);
lua_newtable(L); /* create it */
lua_pushstring(L, libname);
lua_pushvalue(L, -2);
lua_settable(L, LUA_GLOBALSINDEX); /* register it with given name */
}
lua_insert(L, -(nup+1)); /* move library table to below upvalues */
}
for (; l->name; l++) {
int i;
lua_pushstring(L, l->name);
for (i=0; i<nup; i++) /* copy upvalues to the top */
lua_pushvalue(L, -(nup+1));
lua_pushcclosure(L, l->func, nup);
lua_settable(L, -(nup+3));
}
lua_pop(L, nup); /* remove upvalues */
}
/*
** {======================================================
** getn-setn: size for arrays
** =======================================================
*/
static int checkint (lua_State *L, int topop) {
int n = (int)lua_tonumber(L, -1);
if (n == 0 && !lua_isnumber(L, -1)) n = -1;
lua_pop(L, topop);
return n;
}
static void getsizes (lua_State *L) {
lua_rawgeti(L, LUA_REGISTRYINDEX, ARRAYSIZE_REF);
if (lua_isnil(L, -1)) { /* no `size' table? */
lua_pop(L, 1); /* remove nil */
lua_newtable(L); /* create it */
lua_pushvalue(L, -1); /* `size' will be its own metatable */
lua_setmetatable(L, -2);
lua_pushliteral(L, "__mode");
lua_pushliteral(L, "k");
lua_rawset(L, -3); /* metatable(N).__mode = "k" */
lua_pushvalue(L, -1);
lua_rawseti(L, LUA_REGISTRYINDEX, ARRAYSIZE_REF); /* store in register */
}
}
void luaL_setn (lua_State *L, int t, int n) {
t = abs_index(L, t);
lua_pushliteral(L, "n");
lua_rawget(L, t);
if (checkint(L, 1) >= 0) { /* is there a numeric field `n'? */
lua_pushliteral(L, "n"); /* use it */
lua_pushnumber(L, (lua_Number)n);
lua_rawset(L, t);
}
else { /* use `sizes' */
getsizes(L);
lua_pushvalue(L, t);
lua_pushnumber(L, (lua_Number)n);
lua_rawset(L, -3); /* sizes[t] = n */
lua_pop(L, 1); /* remove `sizes' */
}
}
int luaL_getn (lua_State *L, int t) {
int n;
t = abs_index(L, t);
lua_pushliteral(L, "n"); /* try t.n */
lua_rawget(L, t);
if ((n = checkint(L, 1)) >= 0) return n;
getsizes(L); /* else try sizes[t] */
lua_pushvalue(L, t);
lua_rawget(L, -2);
if ((n = checkint(L, 2)) >= 0) return n;
for (n = 1; ; n++) { /* else must count elements */
lua_rawgeti(L, t, n);
if (lua_isnil(L, -1)) break;
lua_pop(L, 1);
}
lua_pop(L, 1);
return n - 1;
}
/* }====================================================== */
/*
** {======================================================
** Generic Buffer manipulation
** =======================================================
*/
#define bufflen(B) ((B)->p - (B)->buffer)
#define bufffree(B) ((size_t)(LUAL_BUFFERSIZE - bufflen(B)))
#define LIMIT (LUA_MINSTACK/2)
static int emptybuffer (luaL_Buffer *B) {
size_t l = bufflen(B);
if (l == 0) return 0; /* put nothing on stack */
else {
lua_pushlstring(B->L, B->buffer, l);
B->p = B->buffer;
B->lvl++;
return 1;
}
}
static void adjuststack (luaL_Buffer *B) {
if (B->lvl > 1) {
lua_State *L = B->L;
int toget = 1; /* number of levels to concat */
size_t toplen = lua_strlen(L, -1);
do {
size_t l = lua_strlen(L, -(toget+1));
if (B->lvl - toget + 1 >= LIMIT || toplen > l) {
toplen += l;
toget++;
}
else break;
} while (toget < B->lvl);
lua_concat(L, toget);
B->lvl = B->lvl - toget + 1;
}
}
LUALIB_API char *luaL_prepbuffer (luaL_Buffer *B) {
if (emptybuffer(B))
adjuststack(B);
return B->buffer;
}
LUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l) {
while (l--)
luaL_putchar(B, *s++);
}
LUALIB_API void luaL_addstring (luaL_Buffer *B, const char *s) {
luaL_addlstring(B, s, strlen(s));
}
LUALIB_API void luaL_pushresult (luaL_Buffer *B) {
emptybuffer(B);
lua_concat(B->L, B->lvl);
B->lvl = 1;
}
LUALIB_API void luaL_addvalue (luaL_Buffer *B) {
lua_State *L = B->L;
size_t vl = lua_strlen(L, -1);
if (vl <= bufffree(B)) { /* fit into buffer? */
memcpy(B->p, lua_tostring(L, -1), vl); /* put it there */
B->p += vl;
lua_pop(L, 1); /* remove from stack */
}
else {
if (emptybuffer(B))
lua_insert(L, -2); /* put buffer before new value */
B->lvl++; /* add new value into B stack */
adjuststack(B);
}
}
LUALIB_API void luaL_buffinit (lua_State *L, luaL_Buffer *B) {
B->L = L;
B->p = B->buffer;
B->lvl = 0;
}
/* }====================================================== */
LUALIB_API int luaL_ref (lua_State *L, int t) {
int ref;
t = abs_index(L, t);
if (lua_isnil(L, -1)) {
lua_pop(L, 1); /* remove from stack */
return LUA_REFNIL; /* `nil' has a unique fixed reference */
}
lua_rawgeti(L, t, FREELIST_REF); /* get first free element */
ref = (int)lua_tonumber(L, -1); /* ref = t[FREELIST_REF] */
lua_pop(L, 1); /* remove it from stack */
if (ref != 0) { /* any free element? */
lua_rawgeti(L, t, ref); /* remove it from list */
lua_rawseti(L, t, FREELIST_REF); /* (t[FREELIST_REF] = t[ref]) */
}
else { /* no free elements */
ref = luaL_getn(L, t);
if (ref < RESERVED_REFS)
ref = RESERVED_REFS; /* skip reserved references */
ref++; /* create new reference */
luaL_setn(L, t, ref);
}
lua_rawseti(L, t, ref);
return ref;
}
LUALIB_API void luaL_unref (lua_State *L, int t, int ref) {
if (ref >= 0) {
t = abs_index(L, t);
lua_rawgeti(L, t, FREELIST_REF);
lua_rawseti(L, t, ref); /* t[ref] = t[FREELIST_REF] */
lua_pushnumber(L, (lua_Number)ref);
lua_rawseti(L, t, FREELIST_REF); /* t[FREELIST_REF] = ref */
}
}
/*
** {======================================================
** Load functions
** =======================================================
*/
typedef struct LoadF {
FILE *f;
char buff[LUAL_BUFFERSIZE];
} LoadF;
static const char *getF (lua_State *L, void *ud, size_t *size) {
LoadF *lf = (LoadF *)ud;
(void)L;
if (feof(lf->f)) return NULL;
*size = fread(lf->buff, 1, LUAL_BUFFERSIZE, lf->f);
return (*size > 0) ? lf->buff : NULL;
}
static int errfile (lua_State *L, int fnameindex) {
const char *filename = lua_tostring(L, fnameindex) + 1;
lua_pushfstring(L, "cannot read %s: %s", filename, strerror(errno));
lua_remove(L, fnameindex);
return LUA_ERRFILE;
}
LUALIB_API int luaL_loadfile (lua_State *L, const char *filename) {
LoadF lf;
int status, readstatus;
int c;
int fnameindex = lua_gettop(L) + 1; /* index of filename on the stack */
if (filename == NULL) {
lua_pushliteral(L, "=stdin");
lf.f = stdin;
}
else {
lua_pushfstring(L, "@%s", filename);
lf.f = fopen(filename, "r");
}
if (lf.f == NULL) return errfile(L, fnameindex); /* unable to open file */
c = ungetc(getc(lf.f), lf.f);
if (!(isspace(c) || isprint(c)) && lf.f != stdin) { /* binary file? */
fclose(lf.f);
lf.f = fopen(filename, "rb"); /* reopen in binary mode */
if (lf.f == NULL) return errfile(L, fnameindex); /* unable to reopen file */
}
status = lua_load(L, getF, &lf, lua_tostring(L, -1));
readstatus = ferror(lf.f);
if (lf.f != stdin) fclose(lf.f); /* close file (even in case of errors) */
if (readstatus) {
lua_settop(L, fnameindex); /* ignore results from `lua_load' */
return errfile(L, fnameindex);
}
lua_remove(L, fnameindex);
return status;
}
typedef struct LoadS {
const char *s;
size_t size;
} LoadS;
static const char *getS (lua_State *L, void *ud, size_t *size) {
LoadS *ls = (LoadS *)ud;
(void)L;
if (ls->size == 0) return NULL;
*size = ls->size;
ls->size = 0;
return ls->s;
}
LUALIB_API int luaL_loadbuffer (lua_State *L, const char *buff, size_t size,
const char *name) {
LoadS ls;
ls.s = buff;
ls.size = size;
return lua_load(L, getS, &ls, name);
}
/* }====================================================== */
/*
** {======================================================
** compatibility code
** =======================================================
*/
static void callalert (lua_State *L, int status) {
if (status != 0) {
lua_getglobal(L, "_ALERT");
if (lua_isfunction(L, -1)) {
lua_insert(L, -2);
lua_call(L, 1, 0);
}
else { /* no _ALERT function; print it on stderr */
fprintf(stderr, "%s\n", lua_tostring(L, -2));
lua_pop(L, 2); /* remove error message and _ALERT */
}
}
}
static int aux_do (lua_State *L, int status) {
if (status == 0) { /* parse OK? */
status = lua_pcall(L, 0, LUA_MULTRET, 0); /* call main */
}
callalert(L, status);
return status;
}
LUALIB_API int lua_dofile (lua_State *L, const char *filename) {
return aux_do(L, luaL_loadfile(L, filename));
}
LUALIB_API int lua_dobuffer (lua_State *L, const char *buff, size_t size,
const char *name) {
return aux_do(L, luaL_loadbuffer(L, buff, size, name));
}
LUALIB_API int lua_dostring (lua_State *L, const char *str) {
return lua_dobuffer(L, str, strlen(str), str);
}
/* }====================================================== */

677
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@ -0,0 +1,677 @@
/*
** $Id: lbaselib.c,v 1.130c 2003/04/03 13:35:34 roberto Exp $
** Basic library
** See Copyright Notice in lua.h
*/
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define lbaselib_c
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
/*
** If your system does not support `stdout', you can just remove this function.
** If you need, you can define your own `print' function, following this
** model but changing `fputs' to put the strings at a proper place
** (a console window or a log file, for instance).
*/
static int luaB_print (lua_State *L) {
int n = lua_gettop(L); /* number of arguments */
int i;
lua_getglobal(L, "tostring");
for (i=1; i<=n; i++) {
const char *s;
lua_pushvalue(L, -1); /* function to be called */
lua_pushvalue(L, i); /* value to print */
lua_call(L, 1, 1);
s = lua_tostring(L, -1); /* get result */
if (s == NULL)
return luaL_error(L, "`tostring' must return a string to `print'");
if (i>1) fputs("\t", stdout);
fputs(s, stdout);
lua_pop(L, 1); /* pop result */
}
fputs("\n", stdout);
return 0;
}
static int luaB_tonumber (lua_State *L) {
int base = luaL_optint(L, 2, 10);
if (base == 10) { /* standard conversion */
luaL_checkany(L, 1);
if (lua_isnumber(L, 1)) {
lua_pushnumber(L, lua_tonumber(L, 1));
return 1;
}
}
else {
const char *s1 = luaL_checkstring(L, 1);
char *s2;
unsigned long n;
luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range");
n = strtoul(s1, &s2, base);
if (s1 != s2) { /* at least one valid digit? */
while (isspace((unsigned char)(*s2))) s2++; /* skip trailing spaces */
if (*s2 == '\0') { /* no invalid trailing characters? */
lua_pushnumber(L, (lua_Number)n);
return 1;
}
}
}
lua_pushnil(L); /* else not a number */
return 1;
}
static int luaB_error (lua_State *L) {
int level = luaL_optint(L, 2, 1);
luaL_checkany(L, 1);
if (!lua_isstring(L, 1) || level == 0)
lua_pushvalue(L, 1); /* propagate error message without changes */
else { /* add extra information */
luaL_where(L, level);
lua_pushvalue(L, 1);
lua_concat(L, 2);
}
return lua_error(L);
}
static int luaB_getmetatable (lua_State *L) {
luaL_checkany(L, 1);
if (!lua_getmetatable(L, 1)) {
lua_pushnil(L);
return 1; /* no metatable */
}
luaL_getmetafield(L, 1, "__metatable");
return 1; /* returns either __metatable field (if present) or metatable */
}
static int luaB_setmetatable (lua_State *L) {
int t = lua_type(L, 2);
luaL_checktype(L, 1, LUA_TTABLE);
luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2,
"nil or table expected");
if (luaL_getmetafield(L, 1, "__metatable"))
luaL_error(L, "cannot change a protected metatable");
lua_settop(L, 2);
lua_setmetatable(L, 1);
return 1;
}
static void getfunc (lua_State *L) {
if (lua_isfunction(L, 1)) lua_pushvalue(L, 1);
else {
lua_Debug ar;
int level = luaL_optint(L, 1, 1);
luaL_argcheck(L, level >= 0, 1, "level must be non-negative");
if (lua_getstack(L, level, &ar) == 0)
luaL_argerror(L, 1, "invalid level");
lua_getinfo(L, "f", &ar);
if (lua_isnil(L, -1))
luaL_error(L, "no function environment for tail call at level %d",
level);
}
}
static int aux_getfenv (lua_State *L) {
lua_getfenv(L, -1);
lua_pushliteral(L, "__fenv");
lua_rawget(L, -2);
return !lua_isnil(L, -1);
}
static int luaB_getfenv (lua_State *L) {
getfunc(L);
if (!aux_getfenv(L)) /* __fenv not defined? */
lua_pop(L, 1); /* remove it, to return real environment */
return 1;
}
static int luaB_setfenv (lua_State *L) {
luaL_checktype(L, 2, LUA_TTABLE);
getfunc(L);
if (aux_getfenv(L)) /* __fenv defined? */
luaL_error(L, "`setfenv' cannot change a protected environment");
else
lua_pop(L, 2); /* remove __fenv and real environment table */
lua_pushvalue(L, 2);
if (lua_isnumber(L, 1) && lua_tonumber(L, 1) == 0)
lua_replace(L, LUA_GLOBALSINDEX);
else if (lua_setfenv(L, -2) == 0)
luaL_error(L, "`setfenv' cannot change environment of given function");
return 0;
}
static int luaB_rawequal (lua_State *L) {
luaL_checkany(L, 1);
luaL_checkany(L, 2);
lua_pushboolean(L, lua_rawequal(L, 1, 2));
return 1;
}
static int luaB_rawget (lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE);
luaL_checkany(L, 2);
lua_settop(L, 2);
lua_rawget(L, 1);
return 1;
}
static int luaB_rawset (lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE);
luaL_checkany(L, 2);
luaL_checkany(L, 3);
lua_settop(L, 3);
lua_rawset(L, 1);
return 1;
}
static int luaB_gcinfo (lua_State *L) {
lua_pushnumber(L, (lua_Number)lua_getgccount(L));
lua_pushnumber(L, (lua_Number)lua_getgcthreshold(L));
return 2;
}
static int luaB_collectgarbage (lua_State *L) {
lua_setgcthreshold(L, luaL_optint(L, 1, 0));
return 0;
}
static int luaB_type (lua_State *L) {
luaL_checkany(L, 1);
lua_pushstring(L, lua_typename(L, lua_type(L, 1)));
return 1;
}
static int luaB_next (lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE);
lua_settop(L, 2); /* create a 2nd argument if there isn't one */
if (lua_next(L, 1))
return 2;
else {
lua_pushnil(L);
return 1;
}
}
static int luaB_pairs (lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE);
lua_pushliteral(L, "next");
lua_rawget(L, LUA_GLOBALSINDEX); /* return generator, */
lua_pushvalue(L, 1); /* state, */
lua_pushnil(L); /* and initial value */
return 3;
}
static int luaB_ipairs (lua_State *L) {
lua_Number i = lua_tonumber(L, 2);
luaL_checktype(L, 1, LUA_TTABLE);
if (i == 0 && lua_isnone(L, 2)) { /* `for' start? */
lua_pushliteral(L, "ipairs");
lua_rawget(L, LUA_GLOBALSINDEX); /* return generator, */
lua_pushvalue(L, 1); /* state, */
lua_pushnumber(L, 0); /* and initial value */
return 3;
}
else { /* `for' step */
i++; /* next value */
lua_pushnumber(L, i);
lua_rawgeti(L, 1, (int)i);
return (lua_isnil(L, -1)) ? 0 : 2;
}
}
static int load_aux (lua_State *L, int status) {
if (status == 0) /* OK? */
return 1;
else {
lua_pushnil(L);
lua_insert(L, -2); /* put before error message */
return 2; /* return nil plus error message */
}
}
static int luaB_loadstring (lua_State *L) {
size_t l;
const char *s = luaL_checklstring(L, 1, &l);
const char *chunkname = luaL_optstring(L, 2, s);
return load_aux(L, luaL_loadbuffer(L, s, l, chunkname));
}
static int luaB_loadfile (lua_State *L) {
const char *fname = luaL_optstring(L, 1, NULL);
return load_aux(L, luaL_loadfile(L, fname));
}
static int luaB_dofile (lua_State *L) {
const char *fname = luaL_optstring(L, 1, NULL);
int n = lua_gettop(L);
int status = luaL_loadfile(L, fname);
if (status != 0) lua_error(L);
lua_call(L, 0, LUA_MULTRET);
return lua_gettop(L) - n;
}
static int luaB_assert (lua_State *L) {
luaL_checkany(L, 1);
if (!lua_toboolean(L, 1))
return luaL_error(L, "%s", luaL_optstring(L, 2, "assertion failed!"));
lua_settop(L, 1);
return 1;
}
static int luaB_unpack (lua_State *L) {
int n, i;
luaL_checktype(L, 1, LUA_TTABLE);
n = luaL_getn(L, 1);
luaL_checkstack(L, n, "table too big to unpack");
for (i=1; i<=n; i++) /* push arg[1...n] */
lua_rawgeti(L, 1, i);
return n;
}
static int luaB_pcall (lua_State *L) {
int status;
luaL_checkany(L, 1);
status = lua_pcall(L, lua_gettop(L) - 1, LUA_MULTRET, 0);
lua_pushboolean(L, (status == 0));
lua_insert(L, 1);
return lua_gettop(L); /* return status + all results */
}
static int luaB_xpcall (lua_State *L) {
int status;
luaL_checkany(L, 2);
lua_settop(L, 2);
lua_insert(L, 1); /* put error function under function to be called */
status = lua_pcall(L, 0, LUA_MULTRET, 1);
lua_pushboolean(L, (status == 0));
lua_replace(L, 1);
return lua_gettop(L); /* return status + all results */
}
static int luaB_tostring (lua_State *L) {
char buff[128];
luaL_checkany(L, 1);
if (luaL_callmeta(L, 1, "__tostring")) /* is there a metafield? */
return 1; /* use its value */
switch (lua_type(L, 1)) {
case LUA_TNUMBER:
lua_pushstring(L, lua_tostring(L, 1));
return 1;
case LUA_TSTRING:
lua_pushvalue(L, 1);
return 1;
case LUA_TBOOLEAN:
lua_pushstring(L, (lua_toboolean(L, 1) ? "true" : "false"));
return 1;
case LUA_TTABLE:
sprintf(buff, "table: %p", lua_topointer(L, 1));
break;
case LUA_TFUNCTION:
sprintf(buff, "function: %p", lua_topointer(L, 1));
break;
case LUA_TUSERDATA:
case LUA_TLIGHTUSERDATA:
sprintf(buff, "userdata: %p", lua_touserdata(L, 1));
break;
case LUA_TTHREAD:
sprintf(buff, "thread: %p", (void *)lua_tothread(L, 1));
break;
case LUA_TNIL:
lua_pushliteral(L, "nil");
return 1;
}
lua_pushstring(L, buff);
return 1;
}
static int luaB_newproxy (lua_State *L) {
lua_settop(L, 1);
lua_newuserdata(L, 0); /* create proxy */
if (lua_toboolean(L, 1) == 0)
return 1; /* no metatable */
else if (lua_isboolean(L, 1)) {
lua_newtable(L); /* create a new metatable `m' ... */
lua_pushvalue(L, -1); /* ... and mark `m' as a valid metatable */
lua_pushboolean(L, 1);
lua_rawset(L, lua_upvalueindex(1)); /* weaktable[m] = true */
}
else {
int validproxy = 0; /* to check if weaktable[metatable(u)] == true */
if (lua_getmetatable(L, 1)) {
lua_rawget(L, lua_upvalueindex(1));
validproxy = lua_toboolean(L, -1);
lua_pop(L, 1); /* remove value */
}
luaL_argcheck(L, validproxy, 1, "boolean or proxy expected");
lua_getmetatable(L, 1); /* metatable is valid; get it */
}
lua_setmetatable(L, 2);
return 1;
}
/*
** {======================================================
** `require' function
** =======================================================
*/
/* name of global that holds table with loaded packages */
#define REQTAB "_LOADED"
/* name of global that holds the search path for packages */
#define LUA_PATH "LUA_PATH"
#ifndef LUA_PATH_SEP
#define LUA_PATH_SEP ';'
#endif
#ifndef LUA_PATH_MARK
#define LUA_PATH_MARK '?'
#endif
#ifndef LUA_PATH_DEFAULT
#define LUA_PATH_DEFAULT "?;?.lua"
#endif
static const char *getpath (lua_State *L) {
const char *path;
lua_getglobal(L, LUA_PATH); /* try global variable */
path = lua_tostring(L, -1);
lua_pop(L, 1);
if (path) return path;
path = getenv(LUA_PATH); /* else try environment variable */
if (path) return path;
return LUA_PATH_DEFAULT; /* else use default */
}
static const char *pushnextpath (lua_State *L, const char *path) {
const char *l;
if (*path == '\0') return NULL; /* no more paths */
if (*path == LUA_PATH_SEP) path++; /* skip separator */
l = strchr(path, LUA_PATH_SEP); /* find next separator */
if (l == NULL) l = path+strlen(path);
lua_pushlstring(L, path, l - path); /* directory name */
return l;
}
static void pushcomposename (lua_State *L) {
const char *path = lua_tostring(L, -1);
const char *wild;
int n = 1;
while ((wild = strchr(path, LUA_PATH_MARK)) != NULL) {
/* is there stack space for prefix, name, and eventual last sufix? */
luaL_checkstack(L, 3, "too many marks in a path component");
lua_pushlstring(L, path, wild - path); /* push prefix */
lua_pushvalue(L, 1); /* push package name (in place of MARK) */
path = wild + 1; /* continue after MARK */
n += 2;
}
lua_pushstring(L, path); /* push last sufix (`n' already includes this) */
lua_concat(L, n);
}
static int luaB_require (lua_State *L) {
const char *path;
int status = LUA_ERRFILE; /* not found (yet) */
luaL_checkstring(L, 1);
lua_settop(L, 1);
lua_getglobal(L, REQTAB);
if (!lua_istable(L, 2)) return luaL_error(L, "`" REQTAB "' is not a table");
path = getpath(L);
lua_pushvalue(L, 1); /* check package's name in book-keeping table */
lua_rawget(L, 2);
if (lua_toboolean(L, -1)) /* is it there? */
return 1; /* package is already loaded; return its result */
else { /* must load it */
while (status == LUA_ERRFILE) {
lua_settop(L, 3); /* reset stack position */
if ((path = pushnextpath(L, path)) == NULL) break;
pushcomposename(L);
status = luaL_loadfile(L, lua_tostring(L, -1)); /* try to load it */
}
}
switch (status) {
case 0: {
lua_getglobal(L, "_REQUIREDNAME"); /* save previous name */
lua_insert(L, -2); /* put it below function */
lua_pushvalue(L, 1);
lua_setglobal(L, "_REQUIREDNAME"); /* set new name */
lua_call(L, 0, 1); /* run loaded module */
lua_insert(L, -2); /* put result below previous name */
lua_setglobal(L, "_REQUIREDNAME"); /* reset to previous name */
if (lua_isnil(L, -1)) { /* no/nil return? */
lua_pushboolean(L, 1);
lua_replace(L, -2); /* replace to true */
}
lua_pushvalue(L, 1);
lua_pushvalue(L, -2);
lua_rawset(L, 2); /* mark it as loaded */
return 1; /* return value */
}
case LUA_ERRFILE: { /* file not found */
return luaL_error(L, "could not load package `%s' from path `%s'",
lua_tostring(L, 1), getpath(L));
}
default: {
return luaL_error(L, "error loading package `%s' (%s)",
lua_tostring(L, 1), lua_tostring(L, -1));
}
}
}
/* }====================================================== */
static const luaL_reg base_funcs[] = {
{"error", luaB_error},
{"getmetatable", luaB_getmetatable},
{"setmetatable", luaB_setmetatable},
{"getfenv", luaB_getfenv},
{"setfenv", luaB_setfenv},
{"next", luaB_next},
{"ipairs", luaB_ipairs},
{"pairs", luaB_pairs},
{"print", luaB_print},
{"tonumber", luaB_tonumber},
{"tostring", luaB_tostring},
{"type", luaB_type},
{"assert", luaB_assert},
{"unpack", luaB_unpack},
{"rawequal", luaB_rawequal},
{"rawget", luaB_rawget},
{"rawset", luaB_rawset},
{"pcall", luaB_pcall},
{"xpcall", luaB_xpcall},
{"collectgarbage", luaB_collectgarbage},
{"gcinfo", luaB_gcinfo},
{"loadfile", luaB_loadfile},
{"dofile", luaB_dofile},
{"loadstring", luaB_loadstring},
{"require", luaB_require},
{NULL, NULL}
};
/*
** {======================================================
** Coroutine library
** =======================================================
*/
static int auxresume (lua_State *L, lua_State *co, int narg) {
int status;
if (!lua_checkstack(co, narg))
luaL_error(L, "too many arguments to resume");
lua_xmove(L, co, narg);
status = lua_resume(co, narg);
if (status == 0) {
int nres = lua_gettop(co);
if (!lua_checkstack(L, nres))
luaL_error(L, "too many results to resume");
lua_xmove(co, L, nres); /* move yielded values */
return nres;
}
else {
lua_xmove(co, L, 1); /* move error message */
return -1; /* error flag */
}
}
static int luaB_coresume (lua_State *L) {
lua_State *co = lua_tothread(L, 1);
int r;
luaL_argcheck(L, co, 1, "coroutine expected");
r = auxresume(L, co, lua_gettop(L) - 1);
if (r < 0) {
lua_pushboolean(L, 0);
lua_insert(L, -2);
return 2; /* return false + error message */
}
else {
lua_pushboolean(L, 1);
lua_insert(L, -(r + 1));
return r + 1; /* return true + `resume' returns */
}
}
static int luaB_auxwrap (lua_State *L) {
lua_State *co = lua_tothread(L, lua_upvalueindex(1));
int r = auxresume(L, co, lua_gettop(L));
if (r < 0) {
if (lua_isstring(L, -1)) { /* error object is a string? */
luaL_where(L, 1); /* add extra info */
lua_insert(L, -2);
lua_concat(L, 2);
}
lua_error(L); /* propagate error */
}
return r;
}
static int luaB_cocreate (lua_State *L) {
lua_State *NL = lua_newthread(L);
luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), 1,
"Lua function expected");
lua_pushvalue(L, 1); /* move function to top */
lua_xmove(L, NL, 1); /* move function from L to NL */
return 1;
}
static int luaB_cowrap (lua_State *L) {
luaB_cocreate(L);
lua_pushcclosure(L, luaB_auxwrap, 1);
return 1;
}
static int luaB_yield (lua_State *L) {
return lua_yield(L, lua_gettop(L));
}
static int luaB_costatus (lua_State *L) {
lua_State *co = lua_tothread(L, 1);
luaL_argcheck(L, co, 1, "coroutine expected");
if (L == co) lua_pushliteral(L, "running");
else {
lua_Debug ar;
if (lua_getstack(co, 0, &ar) == 0 && lua_gettop(co) == 0)
lua_pushliteral(L, "dead");
else
lua_pushliteral(L, "suspended");
}
return 1;
}
static const luaL_reg co_funcs[] = {
{"create", luaB_cocreate},
{"wrap", luaB_cowrap},
{"resume", luaB_coresume},
{"yield", luaB_yield},
{"status", luaB_costatus},
{NULL, NULL}
};
/* }====================================================== */
static void base_open (lua_State *L) {
lua_pushliteral(L, "_G");
lua_pushvalue(L, LUA_GLOBALSINDEX);
luaL_openlib(L, NULL, base_funcs, 0); /* open lib into global table */
lua_pushliteral(L, "_VERSION");
lua_pushliteral(L, LUA_VERSION);
lua_rawset(L, -3); /* set global _VERSION */
/* `newproxy' needs a weaktable as upvalue */
lua_pushliteral(L, "newproxy");
lua_newtable(L); /* new table `w' */
lua_pushvalue(L, -1); /* `w' will be its own metatable */
lua_setmetatable(L, -2);
lua_pushliteral(L, "__mode");
lua_pushliteral(L, "k");
lua_rawset(L, -3); /* metatable(w).__mode = "k" */
lua_pushcclosure(L, luaB_newproxy, 1);
lua_rawset(L, -3); /* set global `newproxy' */
lua_rawset(L, -1); /* set global _G */
}
LUALIB_API int luaopen_base (lua_State *L) {
base_open(L);
luaL_openlib(L, LUA_COLIBNAME, co_funcs, 0);
lua_newtable(L);
lua_setglobal(L, REQTAB);
return 0;
}

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/*
** $Id: ldblib.c,v 1.80 2003/04/03 13:35:34 roberto Exp $
** Interface from Lua to its debug API
** See Copyright Notice in lua.h
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define ldblib_c
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
static void settabss (lua_State *L, const char *i, const char *v) {
lua_pushstring(L, i);
lua_pushstring(L, v);
lua_rawset(L, -3);
}
static void settabsi (lua_State *L, const char *i, int v) {
lua_pushstring(L, i);
lua_pushnumber(L, (lua_Number)v);
lua_rawset(L, -3);
}
static int getinfo (lua_State *L) {
lua_Debug ar;
const char *options = luaL_optstring(L, 2, "flnSu");
if (lua_isnumber(L, 1)) {
if (!lua_getstack(L, (int)(lua_tonumber(L, 1)), &ar)) {
lua_pushnil(L); /* level out of range */
return 1;
}
}
else if (lua_isfunction(L, 1)) {
lua_pushfstring(L, ">%s", options);
options = lua_tostring(L, -1);
lua_pushvalue(L, 1);
}
else
return luaL_argerror(L, 1, "function or level expected");
if (!lua_getinfo(L, options, &ar))
return luaL_argerror(L, 2, "invalid option");
lua_newtable(L);
for (; *options; options++) {
switch (*options) {
case 'S':
settabss(L, "source", ar.source);
settabss(L, "short_src", ar.short_src);
settabsi(L, "linedefined", ar.linedefined);
settabss(L, "what", ar.what);
break;
case 'l':
settabsi(L, "currentline", ar.currentline);
break;
case 'u':
settabsi(L, "nups", ar.nups);
break;
case 'n':
settabss(L, "name", ar.name);
settabss(L, "namewhat", ar.namewhat);
break;
case 'f':
lua_pushliteral(L, "func");
lua_pushvalue(L, -3);
lua_rawset(L, -3);
break;
}
}
return 1; /* return table */
}
static int getlocal (lua_State *L) {
lua_Debug ar;
const char *name;
if (!lua_getstack(L, luaL_checkint(L, 1), &ar)) /* level out of range? */
return luaL_argerror(L, 1, "level out of range");
name = lua_getlocal(L, &ar, luaL_checkint(L, 2));
if (name) {
lua_pushstring(L, name);
lua_pushvalue(L, -2);
return 2;
}
else {
lua_pushnil(L);
return 1;
}
}
static int setlocal (lua_State *L) {
lua_Debug ar;
if (!lua_getstack(L, luaL_checkint(L, 1), &ar)) /* level out of range? */
return luaL_argerror(L, 1, "level out of range");
luaL_checkany(L, 3);
lua_pushstring(L, lua_setlocal(L, &ar, luaL_checkint(L, 2)));
return 1;
}
static int auxupvalue (lua_State *L, int get) {
const char *name;
int n = luaL_checkint(L, 2);
luaL_checktype(L, 1, LUA_TFUNCTION);
if (lua_iscfunction(L, 1)) return 0; /* cannot touch C upvalues from Lua */
name = get ? lua_getupvalue(L, 1, n) : lua_setupvalue(L, 1, n);
if (name == NULL) return 0;
lua_pushstring(L, name);
lua_insert(L, -(get+1));
return get + 1;
}
static int getupvalue (lua_State *L) {
return auxupvalue(L, 1);
}
static int setupvalue (lua_State *L) {
luaL_checkany(L, 3);
return auxupvalue(L, 0);
}
static const char KEY_HOOK = 'h';
static void hookf (lua_State *L, lua_Debug *ar) {
static const char *const hooknames[] =
{"call", "return", "line", "count", "tail return"};
lua_pushlightuserdata(L, (void *)&KEY_HOOK);
lua_rawget(L, LUA_REGISTRYINDEX);
if (lua_isfunction(L, -1)) {
lua_pushstring(L, hooknames[(int)ar->event]);
if (ar->currentline >= 0)
lua_pushnumber(L, (lua_Number)ar->currentline);
else lua_pushnil(L);
lua_assert(lua_getinfo(L, "lS", ar));
lua_call(L, 2, 0);
}
else
lua_pop(L, 1); /* pop result from gettable */
}
static int makemask (const char *smask, int count) {
int mask = 0;
if (strchr(smask, 'c')) mask |= LUA_MASKCALL;
if (strchr(smask, 'r')) mask |= LUA_MASKRET;
if (strchr(smask, 'l')) mask |= LUA_MASKLINE;
if (count > 0) mask |= LUA_MASKCOUNT;
return mask;
}
static char *unmakemask (int mask, char *smask) {
int i = 0;
if (mask & LUA_MASKCALL) smask[i++] = 'c';
if (mask & LUA_MASKRET) smask[i++] = 'r';
if (mask & LUA_MASKLINE) smask[i++] = 'l';
smask[i] = '\0';
return smask;
}
static int sethook (lua_State *L) {
if (lua_isnoneornil(L, 1)) {
lua_settop(L, 1);
lua_sethook(L, NULL, 0, 0); /* turn off hooks */
}
else {
const char *smask = luaL_checkstring(L, 2);
int count = luaL_optint(L, 3, 0);
luaL_checktype(L, 1, LUA_TFUNCTION);
lua_sethook(L, hookf, makemask(smask, count), count);
}
lua_pushlightuserdata(L, (void *)&KEY_HOOK);
lua_pushvalue(L, 1);
lua_rawset(L, LUA_REGISTRYINDEX); /* set new hook */
return 0;
}
static int gethook (lua_State *L) {
char buff[5];
int mask = lua_gethookmask(L);
lua_Hook hook = lua_gethook(L);
if (hook != NULL && hook != hookf) /* external hook? */
lua_pushliteral(L, "external hook");
else {
lua_pushlightuserdata(L, (void *)&KEY_HOOK);
lua_rawget(L, LUA_REGISTRYINDEX); /* get hook */
}
lua_pushstring(L, unmakemask(mask, buff));
lua_pushnumber(L, (lua_Number)lua_gethookcount(L));
return 3;
}
static int debug (lua_State *L) {
for (;;) {
char buffer[250];
fputs("lua_debug> ", stderr);
if (fgets(buffer, sizeof(buffer), stdin) == 0 ||
strcmp(buffer, "cont\n") == 0)
return 0;
lua_dostring(L, buffer);
lua_settop(L, 0); /* remove eventual returns */
}
}
#define LEVELS1 12 /* size of the first part of the stack */
#define LEVELS2 10 /* size of the second part of the stack */
static int errorfb (lua_State *L) {
int level = 1; /* skip level 0 (it's this function) */
int firstpart = 1; /* still before eventual `...' */
lua_Debug ar;
if (lua_gettop(L) == 0)
lua_pushliteral(L, "");
else if (!lua_isstring(L, 1)) return 1; /* no string message */
else lua_pushliteral(L, "\n");
lua_pushliteral(L, "stack traceback:");
while (lua_getstack(L, level++, &ar)) {
if (level > LEVELS1 && firstpart) {
/* no more than `LEVELS2' more levels? */
if (!lua_getstack(L, level+LEVELS2, &ar))
level--; /* keep going */
else {
lua_pushliteral(L, "\n\t..."); /* too many levels */
while (lua_getstack(L, level+LEVELS2, &ar)) /* find last levels */
level++;
}
firstpart = 0;
continue;
}
lua_pushliteral(L, "\n\t");
lua_getinfo(L, "Snl", &ar);
lua_pushfstring(L, "%s:", ar.short_src);
if (ar.currentline > 0)
lua_pushfstring(L, "%d:", ar.currentline);
switch (*ar.namewhat) {
case 'g': /* global */
case 'l': /* local */
case 'f': /* field */
case 'm': /* method */
lua_pushfstring(L, " in function `%s'", ar.name);
break;
default: {
if (*ar.what == 'm') /* main? */
lua_pushfstring(L, " in main chunk");
else if (*ar.what == 'C' || *ar.what == 't')
lua_pushliteral(L, " ?"); /* C function or tail call */
else
lua_pushfstring(L, " in function <%s:%d>",
ar.short_src, ar.linedefined);
}
}
lua_concat(L, lua_gettop(L));
}
lua_concat(L, lua_gettop(L));
return 1;
}
static const luaL_reg dblib[] = {
{"getlocal", getlocal},
{"getinfo", getinfo},
{"gethook", gethook},
{"getupvalue", getupvalue},
{"sethook", sethook},
{"setlocal", setlocal},
{"setupvalue", setupvalue},
{"debug", debug},
{"traceback", errorfb},
{NULL, NULL}
};
LUALIB_API int luaopen_debug (lua_State *L) {
luaL_openlib(L, LUA_DBLIBNAME, dblib, 0);
lua_pushliteral(L, "_TRACEBACK");
lua_pushcfunction(L, errorfb);
lua_settable(L, LUA_GLOBALSINDEX);
return 1;
}

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/*
** $Id: liolib.c,v 2.39b 2003/03/19 21:16:12 roberto Exp $
** Standard I/O (and system) library
** See Copyright Notice in lua.h
*/
#include <errno.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#define liolib_c
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
typedef struct FileHandle {
FILE *f;
int ispipe;
} FileHandle;
/*
** by default, gcc does not get `tmpname'
*/
#ifndef USE_TMPNAME
#ifdef __GNUC__
#define USE_TMPNAME 0
#else
#define USE_TMPNAME 1
#endif
#endif
/*
** by default, posix systems get `popen'
*/
#ifndef USE_POPEN
#ifdef _POSIX_C_SOURCE
#if _POSIX_C_SOURCE >= 2
#define USE_POPEN 1
#endif
#endif
#endif
#ifndef USE_POPEN
#define USE_POPEN 0
#endif
/*
** {======================================================
** FILE Operations
** =======================================================
*/
#if !USE_POPEN
#define pclose(f) (-1)
#endif
#define FILEHANDLE "FILE*"
#define IO_INPUT "_input"
#define IO_OUTPUT "_output"
static int pushresult (lua_State *L, int i, const char *filename) {
if (i) {
lua_pushboolean(L, 1);
return 1;
}
else {
lua_pushnil(L);
if (filename)
lua_pushfstring(L, "%s: %s", filename, strerror(errno));
else
lua_pushfstring(L, "%s", strerror(errno));
lua_pushnumber(L, errno);
return 3;
}
}
static FileHandle *topfile (lua_State *L, int findex) {
FileHandle *fh = (FileHandle *)luaL_checkudata(L, findex, FILEHANDLE);
if (fh == NULL) luaL_argerror(L, findex, "bad file");
return fh;
}
static int io_type (lua_State *L) {
FileHandle *fh = (FileHandle *)luaL_checkudata(L, 1, FILEHANDLE);
if (fh == NULL) lua_pushnil(L);
else if (fh->f == NULL)
lua_pushliteral(L, "closed file");
else
lua_pushliteral(L, "file");
return 1;
}
#define tofile(L,i) (tofileh(L,i)->f)
static FileHandle *tofileh (lua_State *L, int findex) {
FileHandle *fh = topfile(L, findex);
if (fh->f == NULL)
luaL_error(L, "attempt to use a closed file");
return fh;
}
#define newfile(L) (&(newfileh(L)->f))
/*
** When creating file handles, always creates a `closed' file handle
** before opening the actual file; so, if there is a memory error, the
** file is not left opened.
*/
static FileHandle *newfileh (lua_State *L) {
FileHandle *fh = (FileHandle *)lua_newuserdata(L, sizeof(FileHandle));
fh->f = NULL; /* file handle is currently `closed' */
fh->ispipe = 0;
luaL_getmetatable(L, FILEHANDLE);
lua_setmetatable(L, -2);
return fh;
}
/*
** assumes that top of the stack is the `io' library, and next is
** the `io' metatable
*/
static void registerfile (lua_State *L, FILE *f, const char *name,
const char *impname) {
lua_pushstring(L, name);
*newfile(L) = f;
if (impname) {
lua_pushstring(L, impname);
lua_pushvalue(L, -2);
lua_settable(L, -6); /* metatable[impname] = file */
}
lua_settable(L, -3); /* io[name] = file */
}
static int aux_close (lua_State *L) {
FileHandle *fh = tofileh(L, 1);
FILE *f = fh->f;
if (f == stdin || f == stdout || f == stderr)
return 0; /* file cannot be closed */
else {
int ok = fh->ispipe ? (pclose(f) != -1) : (fclose(f) == 0);
fh->f = NULL; /* mark file as closed */
return ok;
}
}
static int io_close (lua_State *L) {
if (lua_isnone(L, 1) && lua_type(L, lua_upvalueindex(1)) == LUA_TTABLE) {
lua_pushstring(L, IO_OUTPUT);
lua_rawget(L, lua_upvalueindex(1));
}
return pushresult(L, aux_close(L), NULL);
}
static int io_gc (lua_State *L) {
FileHandle *fh = topfile(L, 1);
if (fh->f != NULL) /* ignore closed files */
aux_close(L);
return 0;
}
static int io_tostring (lua_State *L) {
char buff[128];
FileHandle *fh = topfile(L, 1);
if (fh->f == NULL)
strcpy(buff, "closed");
else
sprintf(buff, "%p", lua_touserdata(L, 1));
lua_pushfstring(L, "file (%s)", buff);
return 1;
}
static int io_open (lua_State *L) {
const char *filename = luaL_checkstring(L, 1);
const char *mode = luaL_optstring(L, 2, "r");
FILE **pf = newfile(L);
*pf = fopen(filename, mode);
return (*pf == NULL) ? pushresult(L, 0, filename) : 1;
}
static int io_popen (lua_State *L) {
#if !USE_POPEN
luaL_error(L, "`popen' not supported");
return 0;
#else
const char *filename = luaL_checkstring(L, 1);
const char *mode = luaL_optstring(L, 2, "r");
FileHandle *fh = newfileh(L);
fh->f = popen(filename, mode);
fh->ispipe = 1;
return (fh->f == NULL) ? pushresult(L, 0, filename) : 1;
#endif
}
static int io_tmpfile (lua_State *L) {
FILE **pf = newfile(L);
*pf = tmpfile();
return (*pf == NULL) ? pushresult(L, 0, NULL) : 1;
}
static FILE *getiofile (lua_State *L, const char *name) {
lua_pushstring(L, name);
lua_rawget(L, lua_upvalueindex(1));
return tofile(L, -1);
}
static int g_iofile (lua_State *L, const char *name, const char *mode) {
if (!lua_isnoneornil(L, 1)) {
const char *filename = lua_tostring(L, 1);
lua_pushstring(L, name);
if (filename) {
FILE **pf = newfile(L);
*pf = fopen(filename, mode);
if (*pf == NULL) {
lua_pushfstring(L, "%s: %s", filename, strerror(errno));
luaL_argerror(L, 1, lua_tostring(L, -1));
}
}
else {
tofile(L, 1); /* check that it's a valid file handle */
lua_pushvalue(L, 1);
}
lua_rawset(L, lua_upvalueindex(1));
}
/* return current value */
lua_pushstring(L, name);
lua_rawget(L, lua_upvalueindex(1));
return 1;
}
static int io_input (lua_State *L) {
return g_iofile(L, IO_INPUT, "r");
}
static int io_output (lua_State *L) {
return g_iofile(L, IO_OUTPUT, "w");
}
static int io_readline (lua_State *L);
static void aux_lines (lua_State *L, int idx, int close) {
lua_pushliteral(L, FILEHANDLE);
lua_rawget(L, LUA_REGISTRYINDEX);
lua_pushvalue(L, idx);
lua_pushboolean(L, close); /* close/not close file when finished */
lua_pushcclosure(L, io_readline, 3);
}
static int f_lines (lua_State *L) {
tofile(L, 1); /* check that it's a valid file handle */
aux_lines(L, 1, 0);
return 1;
}
static int io_lines (lua_State *L) {
if (lua_isnoneornil(L, 1)) { /* no arguments? */
lua_pushstring(L, IO_INPUT);
lua_rawget(L, lua_upvalueindex(1)); /* will iterate over default input */
return f_lines(L);
}
else {
const char *filename = luaL_checkstring(L, 1);
FILE **pf = newfile(L);
*pf = fopen(filename, "r");
luaL_argcheck(L, *pf, 1, strerror(errno));
aux_lines(L, lua_gettop(L), 1);
return 1;
}
}
/*
** {======================================================
** READ
** =======================================================
*/
static int read_number (lua_State *L, FILE *f) {
lua_Number d;
if (fscanf(f, LUA_NUMBER_SCAN, &d) == 1) {
lua_pushnumber(L, d);
return 1;
}
else return 0; /* read fails */
}
static int test_eof (lua_State *L, FILE *f) {
int c = getc(f);
ungetc(c, f);
lua_pushlstring(L, NULL, 0);
return (c != EOF);
}
static int read_line (lua_State *L, FILE *f) {
luaL_Buffer b;
luaL_buffinit(L, &b);
for (;;) {
size_t l;
char *p = luaL_prepbuffer(&b);
if (fgets(p, LUAL_BUFFERSIZE, f) == NULL) { /* eof? */
luaL_pushresult(&b); /* close buffer */
return (lua_strlen(L, -1) > 0); /* check whether read something */
}
l = strlen(p);
if (p[l-1] != '\n')
luaL_addsize(&b, l);
else {
luaL_addsize(&b, l - 1); /* do not include `eol' */
luaL_pushresult(&b); /* close buffer */
return 1; /* read at least an `eol' */
}
}
}
static int read_chars (lua_State *L, FILE *f, size_t n) {
size_t rlen; /* how much to read */
size_t nr; /* number of chars actually read */
luaL_Buffer b;
luaL_buffinit(L, &b);
rlen = LUAL_BUFFERSIZE; /* try to read that much each time */
do {
char *p = luaL_prepbuffer(&b);
if (rlen > n) rlen = n; /* cannot read more than asked */
nr = fread(p, sizeof(char), rlen, f);
luaL_addsize(&b, nr);
n -= nr; /* still have to read `n' chars */
} while (n > 0 && nr == rlen); /* until end of count or eof */
luaL_pushresult(&b); /* close buffer */
return (n == 0 || lua_strlen(L, -1) > 0);
}
static int g_read (lua_State *L, FILE *f, int first) {
int nargs = lua_gettop(L) - 1;
int success;
int n;
if (nargs == 0) { /* no arguments? */
success = read_line(L, f);
n = first+1; /* to return 1 result */
}
else { /* ensure stack space for all results and for auxlib's buffer */
luaL_checkstack(L, nargs+LUA_MINSTACK, "too many arguments");
success = 1;
for (n = first; nargs-- && success; n++) {
if (lua_type(L, n) == LUA_TNUMBER) {
size_t l = (size_t)lua_tonumber(L, n);
success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l);
}
else {
const char *p = lua_tostring(L, n);
luaL_argcheck(L, p && p[0] == '*', n, "invalid option");
switch (p[1]) {
case 'n': /* number */
success = read_number(L, f);
break;
case 'l': /* line */
success = read_line(L, f);
break;
case 'a': /* file */
read_chars(L, f, ~((size_t)0)); /* read MAX_SIZE_T chars */
success = 1; /* always success */
break;
case 'w': /* word */
return luaL_error(L, "obsolete option `*w' to `read'");
default:
return luaL_argerror(L, n, "invalid format");
}
}
}
}
if (!success) {
lua_pop(L, 1); /* remove last result */
lua_pushnil(L); /* push nil instead */
}
return n - first;
}
static int io_read (lua_State *L) {
return g_read(L, getiofile(L, IO_INPUT), 1);
}
static int f_read (lua_State *L) {
return g_read(L, tofile(L, 1), 2);
}
static int io_readline (lua_State *L) {
FILE *f = *(FILE **)lua_touserdata(L, lua_upvalueindex(2));
if (f == NULL) /* file is already closed? */
luaL_error(L, "file is already closed");
if (read_line(L, f)) return 1;
else { /* EOF */
if (lua_toboolean(L, lua_upvalueindex(3))) { /* generator created file? */
lua_settop(L, 0);
lua_pushvalue(L, lua_upvalueindex(2));
aux_close(L); /* close it */
}
return 0;
}
}
/* }====================================================== */
static int g_write (lua_State *L, FILE *f, int arg) {
int nargs = lua_gettop(L) - 1;
int status = 1;
for (; nargs--; arg++) {
if (lua_type(L, arg) == LUA_TNUMBER) {
/* optimization: could be done exactly as for strings */
status = status &&
fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg)) > 0;
}
else {
size_t l;
const char *s = luaL_checklstring(L, arg, &l);
status = status && (fwrite(s, sizeof(char), l, f) == l);
}
}
return pushresult(L, status, NULL);
}
static int io_write (lua_State *L) {
return g_write(L, getiofile(L, IO_OUTPUT), 1);
}
static int f_write (lua_State *L) {
return g_write(L, tofile(L, 1), 2);
}
static int f_seek (lua_State *L) {
static const int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END};
static const char *const modenames[] = {"set", "cur", "end", NULL};
FILE *f = tofile(L, 1);
int op = luaL_findstring(luaL_optstring(L, 2, "cur"), modenames);
long offset = luaL_optlong(L, 3, 0);
luaL_argcheck(L, op != -1, 2, "invalid mode");
op = fseek(f, offset, mode[op]);
if (op)
return pushresult(L, 0, NULL); /* error */
else {
lua_pushnumber(L, ftell(f));
return 1;
}
}
static int io_flush (lua_State *L) {
return pushresult(L, fflush(getiofile(L, IO_OUTPUT)) == 0, NULL);
}
static int f_flush (lua_State *L) {
return pushresult(L, fflush(tofile(L, 1)) == 0, NULL);
}
static const luaL_reg iolib[] = {
{"input", io_input},
{"output", io_output},
{"lines", io_lines},
{"close", io_close},
{"flush", io_flush},
{"open", io_open},
{"popen", io_popen},
{"read", io_read},
{"tmpfile", io_tmpfile},
{"type", io_type},
{"write", io_write},
{NULL, NULL}
};
static const luaL_reg flib[] = {
{"flush", f_flush},
{"read", f_read},
{"lines", f_lines},
{"seek", f_seek},
{"write", f_write},
{"close", io_close},
{"__gc", io_gc},
{"__tostring", io_tostring},
{NULL, NULL}
};
static void createmeta (lua_State *L) {
luaL_newmetatable(L, FILEHANDLE); /* create new metatable for file handles */
/* file methods */
lua_pushliteral(L, "__index");
lua_pushvalue(L, -2); /* push metatable */
lua_rawset(L, -3); /* metatable.__index = metatable */
luaL_openlib(L, NULL, flib, 0);
}
/* }====================================================== */
/*
** {======================================================
** Other O.S. Operations
** =======================================================
*/
static int io_execute (lua_State *L) {
lua_pushnumber(L, system(luaL_checkstring(L, 1)));
return 1;
}
static int io_remove (lua_State *L) {
const char *filename = luaL_checkstring(L, 1);
return pushresult(L, remove(filename) == 0, filename);
}
static int io_rename (lua_State *L) {
const char *fromname = luaL_checkstring(L, 1);
const char *toname = luaL_checkstring(L, 2);
return pushresult(L, rename(fromname, toname) == 0, fromname);
}
static int io_tmpname (lua_State *L) {
#if !USE_TMPNAME
luaL_error(L, "`tmpname' not supported");
return 0;
#else
char buff[L_tmpnam];
if (tmpnam(buff) != buff)
return luaL_error(L, "unable to generate a unique filename in `tmpname'");
lua_pushstring(L, buff);
return 1;
#endif
}
static int io_getenv (lua_State *L) {
lua_pushstring(L, getenv(luaL_checkstring(L, 1))); /* if NULL push nil */
return 1;
}
static int io_clock (lua_State *L) {
lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC);
return 1;
}
/*
** {======================================================
** Time/Date operations
** { year=%Y, month=%m, day=%d, hour=%H, min=%M, sec=%S,
** wday=%w+1, yday=%j, isdst=? }
** =======================================================
*/
static void setfield (lua_State *L, const char *key, int value) {
lua_pushstring(L, key);
lua_pushnumber(L, value);
lua_rawset(L, -3);
}
static void setboolfield (lua_State *L, const char *key, int value) {
lua_pushstring(L, key);
lua_pushboolean(L, value);
lua_rawset(L, -3);
}
static int getboolfield (lua_State *L, const char *key) {
int res;
lua_pushstring(L, key);
lua_gettable(L, -2);
res = lua_toboolean(L, -1);
lua_pop(L, 1);
return res;
}
static int getfield (lua_State *L, const char *key, int d) {
int res;
lua_pushstring(L, key);
lua_gettable(L, -2);
if (lua_isnumber(L, -1))
res = (int)(lua_tonumber(L, -1));
else {
if (d == -2)
return luaL_error(L, "field `%s' missing in date table", key);
res = d;
}
lua_pop(L, 1);
return res;
}
static int io_date (lua_State *L) {
const char *s = luaL_optstring(L, 1, "%c");
time_t t = (time_t)(luaL_optnumber(L, 2, -1));
struct tm *stm;
if (t == (time_t)(-1)) /* no time given? */
t = time(NULL); /* use current time */
if (*s == '!') { /* UTC? */
stm = gmtime(&t);
s++; /* skip `!' */
}
else
stm = localtime(&t);
if (stm == NULL) /* invalid date? */
lua_pushnil(L);
else if (strcmp(s, "*t") == 0) {
lua_newtable(L);
setfield(L, "sec", stm->tm_sec);
setfield(L, "min", stm->tm_min);
setfield(L, "hour", stm->tm_hour);
setfield(L, "day", stm->tm_mday);
setfield(L, "month", stm->tm_mon+1);
setfield(L, "year", stm->tm_year+1900);
setfield(L, "wday", stm->tm_wday+1);
setfield(L, "yday", stm->tm_yday+1);
setboolfield(L, "isdst", stm->tm_isdst);
}
else {
char b[256];
if (strftime(b, sizeof(b), s, stm))
lua_pushstring(L, b);
else
return luaL_error(L, "`date' format too long");
}
return 1;
}
static int io_time (lua_State *L) {
if (lua_isnoneornil(L, 1)) /* called without args? */
lua_pushnumber(L, time(NULL)); /* return current time */
else {
time_t t;
struct tm ts;
luaL_checktype(L, 1, LUA_TTABLE);
lua_settop(L, 1); /* make sure table is at the top */
ts.tm_sec = getfield(L, "sec", 0);
ts.tm_min = getfield(L, "min", 0);
ts.tm_hour = getfield(L, "hour", 12);
ts.tm_mday = getfield(L, "day", -2);
ts.tm_mon = getfield(L, "month", -2) - 1;
ts.tm_year = getfield(L, "year", -2) - 1900;
ts.tm_isdst = getboolfield(L, "isdst");
t = mktime(&ts);
if (t == (time_t)(-1))
lua_pushnil(L);
else
lua_pushnumber(L, t);
}
return 1;
}
static int io_difftime (lua_State *L) {
lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),
(time_t)(luaL_optnumber(L, 2, 0))));
return 1;
}
/* }====================================================== */
static int io_setloc (lua_State *L) {
static const int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY,
LC_NUMERIC, LC_TIME};
static const char *const catnames[] = {"all", "collate", "ctype", "monetary",
"numeric", "time", NULL};
const char *l = lua_tostring(L, 1);
int op = luaL_findstring(luaL_optstring(L, 2, "all"), catnames);
luaL_argcheck(L, l || lua_isnoneornil(L, 1), 1, "string expected");
luaL_argcheck(L, op != -1, 2, "invalid option");
lua_pushstring(L, setlocale(cat[op], l));
return 1;
}
static int io_exit (lua_State *L) {
exit(luaL_optint(L, 1, EXIT_SUCCESS));
return 0; /* to avoid warnings */
}
static const luaL_reg syslib[] = {
{"clock", io_clock},
{"date", io_date},
{"difftime", io_difftime},
{"execute", io_execute},
{"exit", io_exit},
{"getenv", io_getenv},
{"remove", io_remove},
{"rename", io_rename},
{"setlocale", io_setloc},
{"time", io_time},
{"tmpname", io_tmpname},
{NULL, NULL}
};
/* }====================================================== */
LUALIB_API int luaopen_io (lua_State *L) {
luaL_openlib(L, LUA_OSLIBNAME, syslib, 0);
createmeta(L);
lua_pushvalue(L, -1);
luaL_openlib(L, LUA_IOLIBNAME, iolib, 1);
/* put predefined file handles into `io' table */
registerfile(L, stdin, "stdin", IO_INPUT);
registerfile(L, stdout, "stdout", IO_OUTPUT);
registerfile(L, stderr, "stderr", NULL);
return 1;
}

246
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/*
** $Id: lmathlib.c,v 1.56 2003/03/11 12:30:37 roberto Exp $
** Standard mathematical library
** See Copyright Notice in lua.h
*/
#include <stdlib.h>
#include <math.h>
#define lmathlib_c
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
#undef PI
#define PI (3.14159265358979323846)
#define RADIANS_PER_DEGREE (PI/180.0)
/*
** If you want Lua to operate in degrees (instead of radians),
** define USE_DEGREES
*/
#ifdef USE_DEGREES
#define FROMRAD(a) ((a)/RADIANS_PER_DEGREE)
#define TORAD(a) ((a)*RADIANS_PER_DEGREE)
#else
#define FROMRAD(a) (a)
#define TORAD(a) (a)
#endif
static int math_abs (lua_State *L) {
lua_pushnumber(L, fabs(luaL_checknumber(L, 1)));
return 1;
}
static int math_sin (lua_State *L) {
lua_pushnumber(L, sin(TORAD(luaL_checknumber(L, 1))));
return 1;
}
static int math_cos (lua_State *L) {
lua_pushnumber(L, cos(TORAD(luaL_checknumber(L, 1))));
return 1;
}
static int math_tan (lua_State *L) {
lua_pushnumber(L, tan(TORAD(luaL_checknumber(L, 1))));
return 1;
}
static int math_asin (lua_State *L) {
lua_pushnumber(L, FROMRAD(asin(luaL_checknumber(L, 1))));
return 1;
}
static int math_acos (lua_State *L) {
lua_pushnumber(L, FROMRAD(acos(luaL_checknumber(L, 1))));
return 1;
}
static int math_atan (lua_State *L) {
lua_pushnumber(L, FROMRAD(atan(luaL_checknumber(L, 1))));
return 1;
}
static int math_atan2 (lua_State *L) {
lua_pushnumber(L, FROMRAD(atan2(luaL_checknumber(L, 1), luaL_checknumber(L, 2))));
return 1;
}
static int math_ceil (lua_State *L) {
lua_pushnumber(L, ceil(luaL_checknumber(L, 1)));
return 1;
}
static int math_floor (lua_State *L) {
lua_pushnumber(L, floor(luaL_checknumber(L, 1)));
return 1;
}
static int math_mod (lua_State *L) {
lua_pushnumber(L, fmod(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
return 1;
}
static int math_sqrt (lua_State *L) {
lua_pushnumber(L, sqrt(luaL_checknumber(L, 1)));
return 1;
}
static int math_pow (lua_State *L) {
lua_pushnumber(L, pow(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
return 1;
}
static int math_log (lua_State *L) {
lua_pushnumber(L, log(luaL_checknumber(L, 1)));
return 1;
}
static int math_log10 (lua_State *L) {
lua_pushnumber(L, log10(luaL_checknumber(L, 1)));
return 1;
}
static int math_exp (lua_State *L) {
lua_pushnumber(L, exp(luaL_checknumber(L, 1)));
return 1;
}
static int math_deg (lua_State *L) {
lua_pushnumber(L, luaL_checknumber(L, 1)/RADIANS_PER_DEGREE);
return 1;
}
static int math_rad (lua_State *L) {
lua_pushnumber(L, luaL_checknumber(L, 1)*RADIANS_PER_DEGREE);
return 1;
}
static int math_frexp (lua_State *L) {
int e;
lua_pushnumber(L, frexp(luaL_checknumber(L, 1), &e));
lua_pushnumber(L, e);
return 2;
}
static int math_ldexp (lua_State *L) {
lua_pushnumber(L, ldexp(luaL_checknumber(L, 1), luaL_checkint(L, 2)));
return 1;
}
static int math_min (lua_State *L) {
int n = lua_gettop(L); /* number of arguments */
lua_Number dmin = luaL_checknumber(L, 1);
int i;
for (i=2; i<=n; i++) {
lua_Number d = luaL_checknumber(L, i);
if (d < dmin)
dmin = d;
}
lua_pushnumber(L, dmin);
return 1;
}
static int math_max (lua_State *L) {
int n = lua_gettop(L); /* number of arguments */
lua_Number dmax = luaL_checknumber(L, 1);
int i;
for (i=2; i<=n; i++) {
lua_Number d = luaL_checknumber(L, i);
if (d > dmax)
dmax = d;
}
lua_pushnumber(L, dmax);
return 1;
}
static int math_random (lua_State *L) {
/* the `%' avoids the (rare) case of r==1, and is needed also because on
some systems (SunOS!) `rand()' may return a value larger than RAND_MAX */
lua_Number r = (lua_Number)(rand()%RAND_MAX) / (lua_Number)RAND_MAX;
switch (lua_gettop(L)) { /* check number of arguments */
case 0: { /* no arguments */
lua_pushnumber(L, r); /* Number between 0 and 1 */
break;
}
case 1: { /* only upper limit */
int u = luaL_checkint(L, 1);
luaL_argcheck(L, 1<=u, 1, "interval is empty");
lua_pushnumber(L, (int)floor(r*u)+1); /* int between 1 and `u' */
break;
}
case 2: { /* lower and upper limits */
int l = luaL_checkint(L, 1);
int u = luaL_checkint(L, 2);
luaL_argcheck(L, l<=u, 2, "interval is empty");
lua_pushnumber(L, (int)floor(r*(u-l+1))+l); /* int between `l' and `u' */
break;
}
default: return luaL_error(L, "wrong number of arguments");
}
return 1;
}
static int math_randomseed (lua_State *L) {
srand(luaL_checkint(L, 1));
return 0;
}
static const luaL_reg mathlib[] = {
{"abs", math_abs},
{"sin", math_sin},
{"cos", math_cos},
{"tan", math_tan},
{"asin", math_asin},
{"acos", math_acos},
{"atan", math_atan},
{"atan2", math_atan2},
{"ceil", math_ceil},
{"floor", math_floor},
{"mod", math_mod},
{"frexp", math_frexp},
{"ldexp", math_ldexp},
{"sqrt", math_sqrt},
{"min", math_min},
{"max", math_max},
{"log", math_log},
{"log10", math_log10},
{"exp", math_exp},
{"deg", math_deg},
{"pow", math_pow},
{"rad", math_rad},
{"random", math_random},
{"randomseed", math_randomseed},
{NULL, NULL}
};
/*
** Open math library
*/
LUALIB_API int luaopen_math (lua_State *L) {
luaL_openlib(L, LUA_MATHLIBNAME, mathlib, 0);
lua_pushliteral(L, "pi");
lua_pushnumber(L, PI);
lua_settable(L, -3);
lua_pushliteral(L, "__pow");
lua_pushcfunction(L, math_pow);
lua_settable(L, LUA_GLOBALSINDEX);
return 1;
}

205
auto3/lua/src/lib/loadlib.c Normal file
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/*
** $Id: loadlib.c,v 1.4 2003/04/07 20:11:53 roberto Exp $
** Dynamic library loader for Lua
** See Copyright Notice in lua.h
*
* This Lua library exports a single function, called loadlib, which is
* called from Lua as loadlib(lib,init), where lib is the full name of the
* library to be loaded (including the complete path) and init is the name
* of a function to be called after the library is loaded. Typically, this
* function will register other functions, thus making the complete library
* available to Lua. The init function is *not* automatically called by
* loadlib. Instead, loadlib returns the init function as a Lua function
* that the client can call when it thinks is appropriate. In the case of
* errors, loadlib returns nil and two strings describing the error.
* The first string is supplied by the operating system; it should be
* informative and useful for error messages. The second string is "open",
* "init", or "absent" to identify the error and is meant to be used for
* making decisions without having to look into the first string (whose
* format is system-dependent).
*
* This module contains an implementation of loadlib for Unix systems that
* have dlfcn, an implementation for Windows, and a stub for other systems.
* See the list at the end of this file for some links to available
* implementations of dlfcn and interfaces to other native dynamic loaders
* on top of which loadlib could be implemented.
*
*/
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
#undef LOADLIB
#ifdef USE_DLOPEN
#define LOADLIB
/*
* This is an implementation of loadlib based on the dlfcn interface.
* The dlfcn interface is available in Linux, SunOS, Solaris, IRIX, FreeBSD,
* NetBSD, AIX 4.2, HPUX 11, and probably most other Unix flavors, at least
* as an emulation layer on top of native functions.
*/
#include <dlfcn.h>
static int loadlib(lua_State *L)
{
const char *path=luaL_checkstring(L,1);
const char *init=luaL_checkstring(L,2);
void *lib=dlopen(path,RTLD_NOW);
if (lib!=NULL)
{
lua_CFunction f=(lua_CFunction) dlsym(lib,init);
if (f!=NULL)
{
lua_pushlightuserdata(L,lib);
lua_pushcclosure(L,f,1);
return 1;
}
}
/* else return appropriate error messages */
lua_pushnil(L);
lua_pushstring(L,dlerror());
lua_pushstring(L,(lib!=NULL) ? "init" : "open");
if (lib!=NULL) dlclose(lib);
return 3;
}
#endif
/*
** In Windows, default is to use dll; otherwise, default is not to use dll
*/
#ifndef USE_DLL
#ifdef _WIN32
#define USE_DLL 1
#else
#define USE_DLL 0
#endif
#endif
#if USE_DLL
#define LOADLIB
/*
* This is an implementation of loadlib for Windows using native functions.
*/
#include <windows.h>
static void pusherror(lua_State *L)
{
int error=GetLastError();
char buffer[128];
if (FormatMessage(FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM,
0, error, 0, buffer, sizeof(buffer), 0))
lua_pushstring(L,buffer);
else
lua_pushfstring(L,"system error %d\n",error);
}
static int loadlib(lua_State *L)
{
const char *path=luaL_checkstring(L,1);
const char *init=luaL_checkstring(L,2);
HINSTANCE lib=LoadLibrary(path);
if (lib!=NULL)
{
lua_CFunction f=(lua_CFunction) GetProcAddress(lib,init);
if (f!=NULL)
{
lua_pushlightuserdata(L,lib);
lua_pushcclosure(L,f,1);
return 1;
}
}
lua_pushnil(L);
pusherror(L);
lua_pushstring(L,(lib!=NULL) ? "init" : "open");
if (lib!=NULL) FreeLibrary(lib);
return 3;
}
#endif
#ifndef LOADLIB
/* Fallback for other systems */
/*
** Those systems support dlopen, so they should have defined USE_DLOPEN.
** The default (no)implementation gives them a special error message.
*/
#ifdef linux
#define LOADLIB
#endif
#ifdef sun
#define LOADLIB
#endif
#ifdef sgi
#define LOADLIB
#endif
#ifdef BSD
#define LOADLIB
#endif
#ifdef _WIN32
#define LOADLIB
#endif
#ifdef LOADLIB
#undef LOADLIB
#define LOADLIB "`loadlib' not installed (check your Lua configuration)"
#else
#define LOADLIB "`loadlib' not supported"
#endif
static int loadlib(lua_State *L)
{
lua_pushnil(L);
lua_pushliteral(L,LOADLIB);
lua_pushliteral(L,"absent");
return 3;
}
#endif
LUALIB_API int luaopen_loadlib (lua_State *L)
{
lua_register(L,"loadlib",loadlib);
return 0;
}
/*
* Here are some links to available implementations of dlfcn and
* interfaces to other native dynamic loaders on top of which loadlib
* could be implemented. Please send contributions and corrections to us.
*
* AIX
* Starting with AIX 4.2, dlfcn is included in the base OS.
* There is also an emulation package available.
* http://www.faqs.org/faqs/aix-faq/part4/section-21.html
*
* HPUX
* HPUX 11 has dlfcn. For HPUX 10 use shl_*.
* http://www.geda.seul.org/mailinglist/geda-dev37/msg00094.html
* http://www.stat.umn.edu/~luke/xls/projects/dlbasics/dlbasics.html
*
* Macintosh, Windows
* http://www.stat.umn.edu/~luke/xls/projects/dlbasics/dlbasics.html
*
* Mac OS X/Darwin
* http://www.opendarwin.org/projects/dlcompat/
*
* GLIB has wrapper code for BeOS, OS2, Unix and Windows
* http://cvs.gnome.org/lxr/source/glib/gmodule/
*
*/

770
auto3/lua/src/lib/lstrlib.c Normal file
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@ -0,0 +1,770 @@
/*
** $Id: lstrlib.c,v 1.98 2003/04/03 13:35:34 roberto Exp $
** Standard library for string operations and pattern-matching
** See Copyright Notice in lua.h
*/
#include <ctype.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define lstrlib_c
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
/* macro to `unsign' a character */
#ifndef uchar
#define uchar(c) ((unsigned char)(c))
#endif
typedef long sint32; /* a signed version for size_t */
static int str_len (lua_State *L) {
size_t l;
luaL_checklstring(L, 1, &l);
lua_pushnumber(L, (lua_Number)l);
return 1;
}
static sint32 posrelat (sint32 pos, size_t len) {
/* relative string position: negative means back from end */
return (pos>=0) ? pos : (sint32)len+pos+1;
}
static int str_sub (lua_State *L) {
size_t l;
const char *s = luaL_checklstring(L, 1, &l);
sint32 start = posrelat(luaL_checklong(L, 2), l);
sint32 end = posrelat(luaL_optlong(L, 3, -1), l);
if (start < 1) start = 1;
if (end > (sint32)l) end = (sint32)l;
if (start <= end)
lua_pushlstring(L, s+start-1, end-start+1);
else lua_pushliteral(L, "");
return 1;
}
static int str_lower (lua_State *L) {
size_t l;
size_t i;
luaL_Buffer b;
const char *s = luaL_checklstring(L, 1, &l);
luaL_buffinit(L, &b);
for (i=0; i<l; i++)
luaL_putchar(&b, tolower(uchar(s[i])));
luaL_pushresult(&b);
return 1;
}
static int str_upper (lua_State *L) {
size_t l;
size_t i;
luaL_Buffer b;
const char *s = luaL_checklstring(L, 1, &l);
luaL_buffinit(L, &b);
for (i=0; i<l; i++)
luaL_putchar(&b, toupper(uchar(s[i])));
luaL_pushresult(&b);
return 1;
}
static int str_rep (lua_State *L) {
size_t l;
luaL_Buffer b;
const char *s = luaL_checklstring(L, 1, &l);
int n = luaL_checkint(L, 2);
luaL_buffinit(L, &b);
while (n-- > 0)
luaL_addlstring(&b, s, l);
luaL_pushresult(&b);
return 1;
}
static int str_byte (lua_State *L) {
size_t l;
const char *s = luaL_checklstring(L, 1, &l);
sint32 pos = posrelat(luaL_optlong(L, 2, 1), l);
if (pos <= 0 || (size_t)(pos) > l) /* index out of range? */
return 0; /* no answer */
lua_pushnumber(L, uchar(s[pos-1]));
return 1;
}
static int str_char (lua_State *L) {
int n = lua_gettop(L); /* number of arguments */
int i;
luaL_Buffer b;
luaL_buffinit(L, &b);
for (i=1; i<=n; i++) {
int c = luaL_checkint(L, i);
luaL_argcheck(L, uchar(c) == c, i, "invalid value");
luaL_putchar(&b, uchar(c));
}
luaL_pushresult(&b);
return 1;
}
static int writer (lua_State *L, const void* b, size_t size, void* B) {
(void)L;
luaL_addlstring((luaL_Buffer*) B, (const char *)b, size);
return 1;
}
static int str_dump (lua_State *L) {
luaL_Buffer b;
luaL_checktype(L, 1, LUA_TFUNCTION);
luaL_buffinit(L,&b);
if (!lua_dump(L, writer, &b))
luaL_error(L, "unable to dump given function");
luaL_pushresult(&b);
return 1;
}
/*
** {======================================================
** PATTERN MATCHING
** =======================================================
*/
#ifndef MAX_CAPTURES
#define MAX_CAPTURES 32 /* arbitrary limit */
#endif
#define CAP_UNFINISHED (-1)
#define CAP_POSITION (-2)
typedef struct MatchState {
const char *src_init; /* init of source string */
const char *src_end; /* end (`\0') of source string */
lua_State *L;
int level; /* total number of captures (finished or unfinished) */
struct {
const char *init;
sint32 len;
} capture[MAX_CAPTURES];
} MatchState;
#define ESC '%'
#define SPECIALS "^$*+?.([%-"
static int check_capture (MatchState *ms, int l) {
l -= '1';
if (l < 0 || l >= ms->level || ms->capture[l].len == CAP_UNFINISHED)
return luaL_error(ms->L, "invalid capture index");
return l;
}
static int capture_to_close (MatchState *ms) {
int level = ms->level;
for (level--; level>=0; level--)
if (ms->capture[level].len == CAP_UNFINISHED) return level;
return luaL_error(ms->L, "invalid pattern capture");
}
static const char *luaI_classend (MatchState *ms, const char *p) {
switch (*p++) {
case ESC: {
if (*p == '\0')
luaL_error(ms->L, "malformed pattern (ends with `%')");
return p+1;
}
case '[': {
if (*p == '^') p++;
do { /* look for a `]' */
if (*p == '\0')
luaL_error(ms->L, "malformed pattern (missing `]')");
if (*(p++) == ESC && *p != '\0')
p++; /* skip escapes (e.g. `%]') */
} while (*p != ']');
return p+1;
}
default: {
return p;
}
}
}
static int match_class (int c, int cl) {
int res;
switch (tolower(cl)) {
case 'a' : res = isalpha(c); break;
case 'c' : res = iscntrl(c); break;
case 'd' : res = isdigit(c); break;
case 'l' : res = islower(c); break;
case 'p' : res = ispunct(c); break;
case 's' : res = isspace(c); break;
case 'u' : res = isupper(c); break;
case 'w' : res = isalnum(c); break;
case 'x' : res = isxdigit(c); break;
case 'z' : res = (c == 0); break;
default: return (cl == c);
}
return (islower(cl) ? res : !res);
}
static int matchbracketclass (int c, const char *p, const char *ec) {
int sig = 1;
if (*(p+1) == '^') {
sig = 0;
p++; /* skip the `^' */
}
while (++p < ec) {
if (*p == ESC) {
p++;
if (match_class(c, *p))
return sig;
}
else if ((*(p+1) == '-') && (p+2 < ec)) {
p+=2;
if (uchar(*(p-2)) <= c && c <= uchar(*p))
return sig;
}
else if (uchar(*p) == c) return sig;
}
return !sig;
}
static int luaI_singlematch (int c, const char *p, const char *ep) {
switch (*p) {
case '.': return 1; /* matches any char */
case ESC: return match_class(c, *(p+1));
case '[': return matchbracketclass(c, p, ep-1);
default: return (uchar(*p) == c);
}
}
static const char *match (MatchState *ms, const char *s, const char *p);
static const char *matchbalance (MatchState *ms, const char *s,
const char *p) {
if (*p == 0 || *(p+1) == 0)
luaL_error(ms->L, "unbalanced pattern");
if (*s != *p) return NULL;
else {
int b = *p;
int e = *(p+1);
int cont = 1;
while (++s < ms->src_end) {
if (*s == e) {
if (--cont == 0) return s+1;
}
else if (*s == b) cont++;
}
}
return NULL; /* string ends out of balance */
}
static const char *max_expand (MatchState *ms, const char *s,
const char *p, const char *ep) {
sint32 i = 0; /* counts maximum expand for item */
while ((s+i)<ms->src_end && luaI_singlematch(uchar(*(s+i)), p, ep))
i++;
/* keeps trying to match with the maximum repetitions */
while (i>=0) {
const char *res = match(ms, (s+i), ep+1);
if (res) return res;
i--; /* else didn't match; reduce 1 repetition to try again */
}
return NULL;
}
static const char *min_expand (MatchState *ms, const char *s,
const char *p, const char *ep) {
for (;;) {
const char *res = match(ms, s, ep+1);
if (res != NULL)
return res;
else if (s<ms->src_end && luaI_singlematch(uchar(*s), p, ep))
s++; /* try with one more repetition */
else return NULL;
}
}
static const char *start_capture (MatchState *ms, const char *s,
const char *p, int what) {
const char *res;
int level = ms->level;
if (level >= MAX_CAPTURES) luaL_error(ms->L, "too many captures");
ms->capture[level].init = s;
ms->capture[level].len = what;
ms->level = level+1;
if ((res=match(ms, s, p)) == NULL) /* match failed? */
ms->level--; /* undo capture */
return res;
}
static const char *end_capture (MatchState *ms, const char *s,
const char *p) {
int l = capture_to_close(ms);
const char *res;
ms->capture[l].len = s - ms->capture[l].init; /* close capture */
if ((res = match(ms, s, p)) == NULL) /* match failed? */
ms->capture[l].len = CAP_UNFINISHED; /* undo capture */
return res;
}
static const char *match_capture (MatchState *ms, const char *s, int l) {
size_t len;
l = check_capture(ms, l);
len = ms->capture[l].len;
if ((size_t)(ms->src_end-s) >= len &&
memcmp(ms->capture[l].init, s, len) == 0)
return s+len;
else return NULL;
}
static const char *match (MatchState *ms, const char *s, const char *p) {
init: /* using goto's to optimize tail recursion */
switch (*p) {
case '(': { /* start capture */
if (*(p+1) == ')') /* position capture? */
return start_capture(ms, s, p+2, CAP_POSITION);
else
return start_capture(ms, s, p+1, CAP_UNFINISHED);
}
case ')': { /* end capture */
return end_capture(ms, s, p+1);
}
case ESC: {
switch (*(p+1)) {
case 'b': { /* balanced string? */
s = matchbalance(ms, s, p+2);
if (s == NULL) return NULL;
p+=4; goto init; /* else return match(ms, s, p+4); */
}
case 'f': { /* frontier? */
const char *ep; char previous;
p += 2;
if (*p != '[')
luaL_error(ms->L, "missing `[' after `%%f' in pattern");
ep = luaI_classend(ms, p); /* points to what is next */
previous = (s == ms->src_init) ? '\0' : *(s-1);
if (matchbracketclass(uchar(previous), p, ep-1) ||
!matchbracketclass(uchar(*s), p, ep-1)) return NULL;
p=ep; goto init; /* else return match(ms, s, ep); */
}
default: {
if (isdigit(uchar(*(p+1)))) { /* capture results (%0-%9)? */
s = match_capture(ms, s, *(p+1));
if (s == NULL) return NULL;
p+=2; goto init; /* else return match(ms, s, p+2) */
}
goto dflt; /* case default */
}
}
}
case '\0': { /* end of pattern */
return s; /* match succeeded */
}
case '$': {
if (*(p+1) == '\0') /* is the `$' the last char in pattern? */
return (s == ms->src_end) ? s : NULL; /* check end of string */
else goto dflt;
}
default: dflt: { /* it is a pattern item */
const char *ep = luaI_classend(ms, p); /* points to what is next */
int m = s<ms->src_end && luaI_singlematch(uchar(*s), p, ep);
switch (*ep) {
case '?': { /* optional */
const char *res;
if (m && ((res=match(ms, s+1, ep+1)) != NULL))
return res;
p=ep+1; goto init; /* else return match(ms, s, ep+1); */
}
case '*': { /* 0 or more repetitions */
return max_expand(ms, s, p, ep);
}
case '+': { /* 1 or more repetitions */
return (m ? max_expand(ms, s+1, p, ep) : NULL);
}
case '-': { /* 0 or more repetitions (minimum) */
return min_expand(ms, s, p, ep);
}
default: {
if (!m) return NULL;
s++; p=ep; goto init; /* else return match(ms, s+1, ep); */
}
}
}
}
}
static const char *lmemfind (const char *s1, size_t l1,
const char *s2, size_t l2) {
if (l2 == 0) return s1; /* empty strings are everywhere */
else if (l2 > l1) return NULL; /* avoids a negative `l1' */
else {
const char *init; /* to search for a `*s2' inside `s1' */
l2--; /* 1st char will be checked by `memchr' */
l1 = l1-l2; /* `s2' cannot be found after that */
while (l1 > 0 && (init = (const char *)memchr(s1, *s2, l1)) != NULL) {
init++; /* 1st char is already checked */
if (memcmp(init, s2+1, l2) == 0)
return init-1;
else { /* correct `l1' and `s1' to try again */
l1 -= init-s1;
s1 = init;
}
}
return NULL; /* not found */
}
}
static void push_onecapture (MatchState *ms, int i) {
int l = ms->capture[i].len;
if (l == CAP_UNFINISHED) luaL_error(ms->L, "unfinished capture");
if (l == CAP_POSITION)
lua_pushnumber(ms->L, (lua_Number)(ms->capture[i].init - ms->src_init + 1));
else
lua_pushlstring(ms->L, ms->capture[i].init, l);
}
static int push_captures (MatchState *ms, const char *s, const char *e) {
int i;
luaL_checkstack(ms->L, ms->level, "too many captures");
if (ms->level == 0 && s) { /* no explicit captures? */
lua_pushlstring(ms->L, s, e-s); /* return whole match */
return 1;
}
else { /* return all captures */
for (i=0; i<ms->level; i++)
push_onecapture(ms, i);
return ms->level; /* number of strings pushed */
}
}
static int str_find (lua_State *L) {
size_t l1, l2;
const char *s = luaL_checklstring(L, 1, &l1);
const char *p = luaL_checklstring(L, 2, &l2);
sint32 init = posrelat(luaL_optlong(L, 3, 1), l1) - 1;
if (init < 0) init = 0;
else if ((size_t)(init) > l1) init = (sint32)l1;
if (lua_toboolean(L, 4) || /* explicit request? */
strpbrk(p, SPECIALS) == NULL) { /* or no special characters? */
/* do a plain search */
const char *s2 = lmemfind(s+init, l1-init, p, l2);
if (s2) {
lua_pushnumber(L, (lua_Number)(s2-s+1));
lua_pushnumber(L, (lua_Number)(s2-s+l2));
return 2;
}
}
else {
MatchState ms;
int anchor = (*p == '^') ? (p++, 1) : 0;
const char *s1=s+init;
ms.L = L;
ms.src_init = s;
ms.src_end = s+l1;
do {
const char *res;
ms.level = 0;
if ((res=match(&ms, s1, p)) != NULL) {
lua_pushnumber(L, (lua_Number)(s1-s+1)); /* start */
lua_pushnumber(L, (lua_Number)(res-s)); /* end */
return push_captures(&ms, NULL, 0) + 2;
}
} while (s1++<ms.src_end && !anchor);
}
lua_pushnil(L); /* not found */
return 1;
}
static int gfind_aux (lua_State *L) {
MatchState ms;
const char *s = lua_tostring(L, lua_upvalueindex(1));
size_t ls = lua_strlen(L, lua_upvalueindex(1));
const char *p = lua_tostring(L, lua_upvalueindex(2));
const char *src;
ms.L = L;
ms.src_init = s;
ms.src_end = s+ls;
for (src = s + (size_t)lua_tonumber(L, lua_upvalueindex(3));
src <= ms.src_end;
src++) {
const char *e;
ms.level = 0;
if ((e = match(&ms, src, p)) != NULL) {
int newstart = e-s;
if (e == src) newstart++; /* empty match? go at least one position */
lua_pushnumber(L, (lua_Number)newstart);
lua_replace(L, lua_upvalueindex(3));
return push_captures(&ms, src, e);
}
}
return 0; /* not found */
}
static int gfind (lua_State *L) {
luaL_checkstring(L, 1);
luaL_checkstring(L, 2);
lua_settop(L, 2);
lua_pushnumber(L, 0);
lua_pushcclosure(L, gfind_aux, 3);
return 1;
}
static void add_s (MatchState *ms, luaL_Buffer *b,
const char *s, const char *e) {
lua_State *L = ms->L;
if (lua_isstring(L, 3)) {
const char *news = lua_tostring(L, 3);
size_t l = lua_strlen(L, 3);
size_t i;
for (i=0; i<l; i++) {
if (news[i] != ESC)
luaL_putchar(b, news[i]);
else {
i++; /* skip ESC */
if (!isdigit(uchar(news[i])))
luaL_putchar(b, news[i]);
else {
int level = check_capture(ms, news[i]);
push_onecapture(ms, level);
luaL_addvalue(b); /* add capture to accumulated result */
}
}
}
}
else { /* is a function */
int n;
lua_pushvalue(L, 3);
n = push_captures(ms, s, e);
lua_call(L, n, 1);
if (lua_isstring(L, -1))
luaL_addvalue(b); /* add return to accumulated result */
else
lua_pop(L, 1); /* function result is not a string: pop it */
}
}
static int str_gsub (lua_State *L) {
size_t srcl;
const char *src = luaL_checklstring(L, 1, &srcl);
const char *p = luaL_checkstring(L, 2);
int max_s = luaL_optint(L, 4, srcl+1);
int anchor = (*p == '^') ? (p++, 1) : 0;
int n = 0;
MatchState ms;
luaL_Buffer b;
luaL_argcheck(L,
lua_gettop(L) >= 3 && (lua_isstring(L, 3) || lua_isfunction(L, 3)),
3, "string or function expected");
luaL_buffinit(L, &b);
ms.L = L;
ms.src_init = src;
ms.src_end = src+srcl;
while (n < max_s) {
const char *e;
ms.level = 0;
e = match(&ms, src, p);
if (e) {
n++;
add_s(&ms, &b, src, e);
}
if (e && e>src) /* non empty match? */
src = e; /* skip it */
else if (src < ms.src_end)
luaL_putchar(&b, *src++);
else break;
if (anchor) break;
}
luaL_addlstring(&b, src, ms.src_end-src);
luaL_pushresult(&b);
lua_pushnumber(L, (lua_Number)n); /* number of substitutions */
return 2;
}
/* }====================================================== */
/* maximum size of each formatted item (> len(format('%99.99f', -1e308))) */
#define MAX_ITEM 512
/* maximum size of each format specification (such as '%-099.99d') */
#define MAX_FORMAT 20
static void luaI_addquoted (lua_State *L, luaL_Buffer *b, int arg) {
size_t l;
const char *s = luaL_checklstring(L, arg, &l);
luaL_putchar(b, '"');
while (l--) {
switch (*s) {
case '"': case '\\': case '\n': {
luaL_putchar(b, '\\');
luaL_putchar(b, *s);
break;
}
case '\0': {
luaL_addlstring(b, "\\000", 4);
break;
}
default: {
luaL_putchar(b, *s);
break;
}
}
s++;
}
luaL_putchar(b, '"');
}
static const char *scanformat (lua_State *L, const char *strfrmt,
char *form, int *hasprecision) {
const char *p = strfrmt;
while (strchr("-+ #0", *p)) p++; /* skip flags */
if (isdigit(uchar(*p))) p++; /* skip width */
if (isdigit(uchar(*p))) p++; /* (2 digits at most) */
if (*p == '.') {
p++;
*hasprecision = 1;
if (isdigit(uchar(*p))) p++; /* skip precision */
if (isdigit(uchar(*p))) p++; /* (2 digits at most) */
}
if (isdigit(uchar(*p)))
luaL_error(L, "invalid format (width or precision too long)");
if (p-strfrmt+2 > MAX_FORMAT) /* +2 to include `%' and the specifier */
luaL_error(L, "invalid format (too long)");
form[0] = '%';
strncpy(form+1, strfrmt, p-strfrmt+1);
form[p-strfrmt+2] = 0;
return p;
}
static int str_format (lua_State *L) {
int arg = 1;
size_t sfl;
const char *strfrmt = luaL_checklstring(L, arg, &sfl);
const char *strfrmt_end = strfrmt+sfl;
luaL_Buffer b;
luaL_buffinit(L, &b);
while (strfrmt < strfrmt_end) {
if (*strfrmt != '%')
luaL_putchar(&b, *strfrmt++);
else if (*++strfrmt == '%')
luaL_putchar(&b, *strfrmt++); /* %% */
else { /* format item */
char form[MAX_FORMAT]; /* to store the format (`%...') */
char buff[MAX_ITEM]; /* to store the formatted item */
int hasprecision = 0;
if (isdigit(uchar(*strfrmt)) && *(strfrmt+1) == '$')
return luaL_error(L, "obsolete option (d$) to `format'");
arg++;
strfrmt = scanformat(L, strfrmt, form, &hasprecision);
switch (*strfrmt++) {
case 'c': case 'd': case 'i': {
sprintf(buff, form, luaL_checkint(L, arg));
break;
}
case 'o': case 'u': case 'x': case 'X': {
sprintf(buff, form, (unsigned int)(luaL_checknumber(L, arg)));
break;
}
case 'e': case 'E': case 'f':
case 'g': case 'G': {
sprintf(buff, form, luaL_checknumber(L, arg));
break;
}
case 'q': {
luaI_addquoted(L, &b, arg);
continue; /* skip the `addsize' at the end */
}
case 's': {
size_t l;
const char *s = luaL_checklstring(L, arg, &l);
if (!hasprecision && l >= 100) {
/* no precision and string is too long to be formatted;
keep original string */
lua_pushvalue(L, arg);
luaL_addvalue(&b);
continue; /* skip the `addsize' at the end */
}
else {
sprintf(buff, form, s);
break;
}
}
default: { /* also treat cases `pnLlh' */
return luaL_error(L, "invalid option to `format'");
}
}
luaL_addlstring(&b, buff, strlen(buff));
}
}
luaL_pushresult(&b);
return 1;
}
static const luaL_reg strlib[] = {
{"len", str_len},
{"sub", str_sub},
{"lower", str_lower},
{"upper", str_upper},
{"char", str_char},
{"rep", str_rep},
{"byte", str_byte},
{"format", str_format},
{"dump", str_dump},
{"find", str_find},
{"gfind", gfind},
{"gsub", str_gsub},
{NULL, NULL}
};
/*
** Open string library
*/
LUALIB_API int luaopen_string (lua_State *L) {
luaL_openlib(L, LUA_STRLIBNAME, strlib, 0);
return 1;
}

250
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/*
** $Id: ltablib.c,v 1.21 2003/04/03 13:35:34 roberto Exp $
** Library for Table Manipulation
** See Copyright Notice in lua.h
*/
#include <stddef.h>
#define ltablib_c
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
#define aux_getn(L,n) (luaL_checktype(L, n, LUA_TTABLE), luaL_getn(L, n))
static int luaB_foreachi (lua_State *L) {
int i;
int n = aux_getn(L, 1);
luaL_checktype(L, 2, LUA_TFUNCTION);
for (i=1; i<=n; i++) {
lua_pushvalue(L, 2); /* function */
lua_pushnumber(L, (lua_Number)i); /* 1st argument */
lua_rawgeti(L, 1, i); /* 2nd argument */
lua_call(L, 2, 1);
if (!lua_isnil(L, -1))
return 1;
lua_pop(L, 1); /* remove nil result */
}
return 0;
}
static int luaB_foreach (lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE);
luaL_checktype(L, 2, LUA_TFUNCTION);
lua_pushnil(L); /* first key */
for (;;) {
if (lua_next(L, 1) == 0)
return 0;
lua_pushvalue(L, 2); /* function */
lua_pushvalue(L, -3); /* key */
lua_pushvalue(L, -3); /* value */
lua_call(L, 2, 1);
if (!lua_isnil(L, -1))
return 1;
lua_pop(L, 2); /* remove value and result */
}
}
static int luaB_getn (lua_State *L) {
lua_pushnumber(L, (lua_Number)aux_getn(L, 1));
return 1;
}
static int luaB_setn (lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE);
luaL_setn(L, 1, luaL_checkint(L, 2));
return 0;
}
static int luaB_tinsert (lua_State *L) {
int v = lua_gettop(L); /* number of arguments */
int n = aux_getn(L, 1) + 1;
int pos; /* where to insert new element */
if (v == 2) /* called with only 2 arguments */
pos = n; /* insert new element at the end */
else {
pos = luaL_checkint(L, 2); /* 2nd argument is the position */
if (pos > n) n = pos; /* `grow' array if necessary */
v = 3; /* function may be called with more than 3 args */
}
luaL_setn(L, 1, n); /* new size */
while (--n >= pos) { /* move up elements */
lua_rawgeti(L, 1, n);
lua_rawseti(L, 1, n+1); /* t[n+1] = t[n] */
}
lua_pushvalue(L, v);
lua_rawseti(L, 1, pos); /* t[pos] = v */
return 0;
}
static int luaB_tremove (lua_State *L) {
int n = aux_getn(L, 1);
int pos = luaL_optint(L, 2, n);
if (n <= 0) return 0; /* table is `empty' */
luaL_setn(L, 1, n-1); /* t.n = n-1 */
lua_rawgeti(L, 1, pos); /* result = t[pos] */
for ( ;pos<n; pos++) {
lua_rawgeti(L, 1, pos+1);
lua_rawseti(L, 1, pos); /* t[pos] = t[pos+1] */
}
lua_pushnil(L);
lua_rawseti(L, 1, n); /* t[n] = nil */
return 1;
}
static int str_concat (lua_State *L) {
luaL_Buffer b;
size_t lsep;
const char *sep = luaL_optlstring(L, 2, "", &lsep);
int i = luaL_optint(L, 3, 1);
int n = luaL_optint(L, 4, 0);
luaL_checktype(L, 1, LUA_TTABLE);
if (n == 0) n = luaL_getn(L, 1);
luaL_buffinit(L, &b);
for (; i <= n; i++) {
lua_rawgeti(L, 1, i);
luaL_argcheck(L, lua_isstring(L, -1), 1, "table contains non-strings");
luaL_addvalue(&b);
if (i != n)
luaL_addlstring(&b, sep, lsep);
}
luaL_pushresult(&b);
return 1;
}
/*
** {======================================================
** Quicksort
** (based on `Algorithms in MODULA-3', Robert Sedgewick;
** Addison-Wesley, 1993.)
*/
static void set2 (lua_State *L, int i, int j) {
lua_rawseti(L, 1, i);
lua_rawseti(L, 1, j);
}
static int sort_comp (lua_State *L, int a, int b) {
if (!lua_isnil(L, 2)) { /* function? */
int res;
lua_pushvalue(L, 2);
lua_pushvalue(L, a-1); /* -1 to compensate function */
lua_pushvalue(L, b-2); /* -2 to compensate function and `a' */
lua_call(L, 2, 1);
res = lua_toboolean(L, -1);
lua_pop(L, 1);
return res;
}
else /* a < b? */
return lua_lessthan(L, a, b);
}
static void auxsort (lua_State *L, int l, int u) {
while (l < u) { /* for tail recursion */
int i, j;
/* sort elements a[l], a[(l+u)/2] and a[u] */
lua_rawgeti(L, 1, l);
lua_rawgeti(L, 1, u);
if (sort_comp(L, -1, -2)) /* a[u] < a[l]? */
set2(L, l, u); /* swap a[l] - a[u] */
else
lua_pop(L, 2);
if (u-l == 1) break; /* only 2 elements */
i = (l+u)/2;
lua_rawgeti(L, 1, i);
lua_rawgeti(L, 1, l);
if (sort_comp(L, -2, -1)) /* a[i]<a[l]? */
set2(L, i, l);
else {
lua_pop(L, 1); /* remove a[l] */
lua_rawgeti(L, 1, u);
if (sort_comp(L, -1, -2)) /* a[u]<a[i]? */
set2(L, i, u);
else
lua_pop(L, 2);
}
if (u-l == 2) break; /* only 3 elements */
lua_rawgeti(L, 1, i); /* Pivot */
lua_pushvalue(L, -1);
lua_rawgeti(L, 1, u-1);
set2(L, i, u-1);
/* a[l] <= P == a[u-1] <= a[u], only need to sort from l+1 to u-2 */
i = l; j = u-1;
for (;;) { /* invariant: a[l..i] <= P <= a[j..u] */
/* repeat ++i until a[i] >= P */
while (lua_rawgeti(L, 1, ++i), sort_comp(L, -1, -2)) {
if (i>u) luaL_error(L, "invalid order function for sorting");
lua_pop(L, 1); /* remove a[i] */
}
/* repeat --j until a[j] <= P */
while (lua_rawgeti(L, 1, --j), sort_comp(L, -3, -1)) {
if (j<l) luaL_error(L, "invalid order function for sorting");
lua_pop(L, 1); /* remove a[j] */
}
if (j<i) {
lua_pop(L, 3); /* pop pivot, a[i], a[j] */
break;
}
set2(L, i, j);
}
lua_rawgeti(L, 1, u-1);
lua_rawgeti(L, 1, i);
set2(L, u-1, i); /* swap pivot (a[u-1]) with a[i] */
/* a[l..i-1] <= a[i] == P <= a[i+1..u] */
/* adjust so that smaller half is in [j..i] and larger one in [l..u] */
if (i-l < u-i) {
j=l; i=i-1; l=i+2;
}
else {
j=i+1; i=u; u=j-2;
}
auxsort(L, j, i); /* call recursively the smaller one */
} /* repeat the routine for the larger one */
}
static int luaB_sort (lua_State *L) {
int n = aux_getn(L, 1);
luaL_checkstack(L, 40, ""); /* assume array is smaller than 2^40 */
if (!lua_isnoneornil(L, 2)) /* is there a 2nd argument? */
luaL_checktype(L, 2, LUA_TFUNCTION);
lua_settop(L, 2); /* make sure there is two arguments */
auxsort(L, 1, n);
return 0;
}
/* }====================================================== */
static const luaL_reg tab_funcs[] = {
{"concat", str_concat},
{"foreach", luaB_foreach},
{"foreachi", luaB_foreachi},
{"getn", luaB_getn},
{"setn", luaB_setn},
{"sort", luaB_sort},
{"insert", luaB_tinsert},
{"remove", luaB_tremove},
{NULL, NULL}
};
LUALIB_API int luaopen_table (lua_State *L) {
luaL_openlib(L, LUA_TABLIBNAME, tab_funcs, 0);
return 1;
}

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/*
** $Id: llex.c,v 1.119 2003/03/24 12:39:34 roberto Exp $
** Lexical Analyzer
** See Copyright Notice in lua.h
*/
#include <ctype.h>
#include <string.h>
#define llex_c
#include "lua.h"
#include "ldo.h"
#include "llex.h"
#include "lobject.h"
#include "lparser.h"
#include "lstate.h"
#include "lstring.h"
#include "lzio.h"
#define next(LS) (LS->current = zgetc(LS->z))
/* ORDER RESERVED */
static const char *const token2string [] = {
"and", "break", "do", "else", "elseif",
"end", "false", "for", "function", "if",
"in", "local", "nil", "not", "or", "repeat",
"return", "then", "true", "until", "while", "*name",
"..", "...", "==", ">=", "<=", "~=",
"*number", "*string", "<eof>"
};
void luaX_init (lua_State *L) {
int i;
for (i=0; i<NUM_RESERVED; i++) {
TString *ts = luaS_new(L, token2string[i]);
luaS_fix(ts); /* reserved words are never collected */
lua_assert(strlen(token2string[i])+1 <= TOKEN_LEN);
ts->tsv.reserved = cast(lu_byte, i+1); /* reserved word */
}
}
#define MAXSRC 80
void luaX_checklimit (LexState *ls, int val, int limit, const char *msg) {
if (val > limit) {
msg = luaO_pushfstring(ls->L, "too many %s (limit=%d)", msg, limit);
luaX_syntaxerror(ls, msg);
}
}
void luaX_errorline (LexState *ls, const char *s, const char *token, int line) {
lua_State *L = ls->L;
char buff[MAXSRC];
luaO_chunkid(buff, getstr(ls->source), MAXSRC);
luaO_pushfstring(L, "%s:%d: %s near `%s'", buff, line, s, token);
luaD_throw(L, LUA_ERRSYNTAX);
}
static void luaX_error (LexState *ls, const char *s, const char *token) {
luaX_errorline(ls, s, token, ls->linenumber);
}
void luaX_syntaxerror (LexState *ls, const char *msg) {
const char *lasttoken;
switch (ls->t.token) {
case TK_NAME:
lasttoken = getstr(ls->t.seminfo.ts);
break;
case TK_STRING:
case TK_NUMBER:
lasttoken = luaZ_buffer(ls->buff);
break;
default:
lasttoken = luaX_token2str(ls, ls->t.token);
break;
}
luaX_error(ls, msg, lasttoken);
}
const char *luaX_token2str (LexState *ls, int token) {
if (token < FIRST_RESERVED) {
lua_assert(token == (unsigned char)token);
return luaO_pushfstring(ls->L, "%c", token);
}
else
return token2string[token-FIRST_RESERVED];
}
static void luaX_lexerror (LexState *ls, const char *s, int token) {
if (token == TK_EOS)
luaX_error(ls, s, luaX_token2str(ls, token));
else
luaX_error(ls, s, luaZ_buffer(ls->buff));
}
static void inclinenumber (LexState *LS) {
next(LS); /* skip `\n' */
++LS->linenumber;
luaX_checklimit(LS, LS->linenumber, MAX_INT, "lines in a chunk");
}
void luaX_setinput (lua_State *L, LexState *LS, ZIO *z, TString *source) {
LS->L = L;
LS->lookahead.token = TK_EOS; /* no look-ahead token */
LS->z = z;
LS->fs = NULL;
LS->linenumber = 1;
LS->lastline = 1;
LS->source = source;
next(LS); /* read first char */
if (LS->current == '#') {
do { /* skip first line */
next(LS);
} while (LS->current != '\n' && LS->current != EOZ);
}
}
/*
** =======================================================
** LEXICAL ANALYZER
** =======================================================
*/
/* use buffer to store names, literal strings and numbers */
/* extra space to allocate when growing buffer */
#define EXTRABUFF 32
/* maximum number of chars that can be read without checking buffer size */
#define MAXNOCHECK 5
#define checkbuffer(LS, len) \
if (((len)+MAXNOCHECK)*sizeof(char) > luaZ_sizebuffer((LS)->buff)) \
luaZ_openspace((LS)->L, (LS)->buff, (len)+EXTRABUFF)
#define save(LS, c, l) \
(luaZ_buffer((LS)->buff)[l++] = cast(char, c))
#define save_and_next(LS, l) (save(LS, LS->current, l), next(LS))
static size_t readname (LexState *LS) {
size_t l = 0;
checkbuffer(LS, l);
do {
checkbuffer(LS, l);
save_and_next(LS, l);
} while (isalnum(LS->current) || LS->current == '_');
save(LS, '\0', l);
return l-1;
}
/* LUA_NUMBER */
static void read_numeral (LexState *LS, int comma, SemInfo *seminfo) {
size_t l = 0;
checkbuffer(LS, l);
if (comma) save(LS, '.', l);
while (isdigit(LS->current)) {
checkbuffer(LS, l);
save_and_next(LS, l);
}
if (LS->current == '.') {
save_and_next(LS, l);
if (LS->current == '.') {
save_and_next(LS, l);
save(LS, '\0', l);
luaX_lexerror(LS,
"ambiguous syntax (decimal point x string concatenation)",
TK_NUMBER);
}
}
while (isdigit(LS->current)) {
checkbuffer(LS, l);
save_and_next(LS, l);
}
if (LS->current == 'e' || LS->current == 'E') {
save_and_next(LS, l); /* read `E' */
if (LS->current == '+' || LS->current == '-')
save_and_next(LS, l); /* optional exponent sign */
while (isdigit(LS->current)) {
checkbuffer(LS, l);
save_and_next(LS, l);
}
}
save(LS, '\0', l);
if (!luaO_str2d(luaZ_buffer(LS->buff), &seminfo->r))
luaX_lexerror(LS, "malformed number", TK_NUMBER);
}
static void read_long_string (LexState *LS, SemInfo *seminfo) {
int cont = 0;
size_t l = 0;
checkbuffer(LS, l);
save(LS, '[', l); /* save first `[' */
save_and_next(LS, l); /* pass the second `[' */
if (LS->current == '\n') /* string starts with a newline? */
inclinenumber(LS); /* skip it */
for (;;) {
checkbuffer(LS, l);
switch (LS->current) {
case EOZ:
save(LS, '\0', l);
luaX_lexerror(LS, (seminfo) ? "unfinished long string" :
"unfinished long comment", TK_EOS);
break; /* to avoid warnings */
case '[':
save_and_next(LS, l);
if (LS->current == '[') {
cont++;
save_and_next(LS, l);
}
continue;
case ']':
save_and_next(LS, l);
if (LS->current == ']') {
if (cont == 0) goto endloop;
cont--;
save_and_next(LS, l);
}
continue;
case '\n':
save(LS, '\n', l);
inclinenumber(LS);
if (!seminfo) l = 0; /* reset buffer to avoid wasting space */
continue;
default:
save_and_next(LS, l);
}
} endloop:
save_and_next(LS, l); /* skip the second `]' */
save(LS, '\0', l);
if (seminfo)
seminfo->ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff) + 2, l - 5);
}
static void read_string (LexState *LS, int del, SemInfo *seminfo) {
size_t l = 0;
checkbuffer(LS, l);
save_and_next(LS, l);
while (LS->current != del) {
checkbuffer(LS, l);
switch (LS->current) {
case EOZ:
save(LS, '\0', l);
luaX_lexerror(LS, "unfinished string", TK_EOS);
break; /* to avoid warnings */
case '\n':
save(LS, '\0', l);
luaX_lexerror(LS, "unfinished string", TK_STRING);
break; /* to avoid warnings */
case '\\':
next(LS); /* do not save the `\' */
switch (LS->current) {
case 'a': save(LS, '\a', l); next(LS); break;
case 'b': save(LS, '\b', l); next(LS); break;
case 'f': save(LS, '\f', l); next(LS); break;
case 'n': save(LS, '\n', l); next(LS); break;
case 'r': save(LS, '\r', l); next(LS); break;
case 't': save(LS, '\t', l); next(LS); break;
case 'v': save(LS, '\v', l); next(LS); break;
case '\n': save(LS, '\n', l); inclinenumber(LS); break;
case EOZ: break; /* will raise an error next loop */
default: {
if (!isdigit(LS->current))
save_and_next(LS, l); /* handles \\, \", \', and \? */
else { /* \xxx */
int c = 0;
int i = 0;
do {
c = 10*c + (LS->current-'0');
next(LS);
} while (++i<3 && isdigit(LS->current));
if (c > UCHAR_MAX) {
save(LS, '\0', l);
luaX_lexerror(LS, "escape sequence too large", TK_STRING);
}
save(LS, c, l);
}
}
}
break;
default:
save_and_next(LS, l);
}
}
save_and_next(LS, l); /* skip delimiter */
save(LS, '\0', l);
seminfo->ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff) + 1, l - 3);
}
int luaX_lex (LexState *LS, SemInfo *seminfo) {
for (;;) {
switch (LS->current) {
case '\n': {
inclinenumber(LS);
continue;
}
case '-': {
next(LS);
if (LS->current != '-') return '-';
/* else is a comment */
next(LS);
if (LS->current == '[' && (next(LS), LS->current == '['))
read_long_string(LS, NULL); /* long comment */
else /* short comment */
while (LS->current != '\n' && LS->current != EOZ)
next(LS);
continue;
}
case '[': {
next(LS);
if (LS->current != '[') return '[';
else {
read_long_string(LS, seminfo);
return TK_STRING;
}
}
case '=': {
next(LS);
if (LS->current != '=') return '=';
else { next(LS); return TK_EQ; }
}
case '<': {
next(LS);
if (LS->current != '=') return '<';
else { next(LS); return TK_LE; }
}
case '>': {
next(LS);
if (LS->current != '=') return '>';
else { next(LS); return TK_GE; }
}
case '~': {
next(LS);
if (LS->current != '=') return '~';
else { next(LS); return TK_NE; }
}
case '"':
case '\'': {
read_string(LS, LS->current, seminfo);
return TK_STRING;
}
case '.': {
next(LS);
if (LS->current == '.') {
next(LS);
if (LS->current == '.') {
next(LS);
return TK_DOTS; /* ... */
}
else return TK_CONCAT; /* .. */
}
else if (!isdigit(LS->current)) return '.';
else {
read_numeral(LS, 1, seminfo);
return TK_NUMBER;
}
}
case EOZ: {
return TK_EOS;
}
default: {
if (isspace(LS->current)) {
next(LS);
continue;
}
else if (isdigit(LS->current)) {
read_numeral(LS, 0, seminfo);
return TK_NUMBER;
}
else if (isalpha(LS->current) || LS->current == '_') {
/* identifier or reserved word */
size_t l = readname(LS);
TString *ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff), l);
if (ts->tsv.reserved > 0) /* reserved word? */
return ts->tsv.reserved - 1 + FIRST_RESERVED;
seminfo->ts = ts;
return TK_NAME;
}
else {
int c = LS->current;
if (iscntrl(c))
luaX_error(LS, "invalid control char",
luaO_pushfstring(LS->L, "char(%d)", c));
next(LS);
return c; /* single-char tokens (+ - / ...) */
}
}
}
}
}
#undef next

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/*
** $Id: llex.h,v 1.47 2003/02/28 17:19:47 roberto Exp $
** Lexical Analyzer
** See Copyright Notice in lua.h
*/
#ifndef llex_h
#define llex_h
#include "lobject.h"
#include "lzio.h"
#define FIRST_RESERVED 257
/* maximum length of a reserved word */
#define TOKEN_LEN (sizeof("function")/sizeof(char))
/*
* WARNING: if you change the order of this enumeration,
* grep "ORDER RESERVED"
*/
enum RESERVED {
/* terminal symbols denoted by reserved words */
TK_AND = FIRST_RESERVED, TK_BREAK,
TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION,
TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT,
TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE,
/* other terminal symbols */
TK_NAME, TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_NUMBER,
TK_STRING, TK_EOS
};
/* number of reserved words */
#define NUM_RESERVED (cast(int, TK_WHILE-FIRST_RESERVED+1))
typedef union {
lua_Number r;
TString *ts;
} SemInfo; /* semantics information */
typedef struct Token {
int token;
SemInfo seminfo;
} Token;
typedef struct LexState {
int current; /* current character (charint) */
int linenumber; /* input line counter */
int lastline; /* line of last token `consumed' */
Token t; /* current token */
Token lookahead; /* look ahead token */
struct FuncState *fs; /* `FuncState' is private to the parser */
struct lua_State *L;
ZIO *z; /* input stream */
Mbuffer *buff; /* buffer for tokens */
TString *source; /* current source name */
int nestlevel; /* level of nested non-terminals */
} LexState;
void luaX_init (lua_State *L);
void luaX_setinput (lua_State *L, LexState *LS, ZIO *z, TString *source);
int luaX_lex (LexState *LS, SemInfo *seminfo);
void luaX_checklimit (LexState *ls, int val, int limit, const char *msg);
void luaX_syntaxerror (LexState *ls, const char *s);
void luaX_errorline (LexState *ls, const char *s, const char *token, int line);
const char *luaX_token2str (LexState *ls, int token);
#endif

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/*
** $Id: llimits.h,v 1.52 2003/02/20 19:33:23 roberto Exp $
** Limits, basic types, and some other `installation-dependent' definitions
** See Copyright Notice in lua.h
*/
#ifndef llimits_h
#define llimits_h
#include <limits.h>
#include <stddef.h>
#include "lua.h"
/*
** try to find number of bits in an integer
*/
#ifndef BITS_INT
/* avoid overflows in comparison */
#if INT_MAX-20 < 32760
#define BITS_INT 16
#else
#if INT_MAX > 2147483640L
/* machine has at least 32 bits */
#define BITS_INT 32
#else
#error "you must define BITS_INT with number of bits in an integer"
#endif
#endif
#endif
/*
** the following types define integer types for values that may not
** fit in a `small int' (16 bits), but may waste space in a
** `large long' (64 bits). The current definitions should work in
** any machine, but may not be optimal.
*/
/* an unsigned integer to hold hash values */
typedef unsigned int lu_hash;
/* its signed equivalent */
typedef int ls_hash;
/* an unsigned integer big enough to count the total memory used by Lua; */
/* it should be at least as large as size_t */
typedef unsigned long lu_mem;
#define MAX_LUMEM ULONG_MAX
/* an integer big enough to count the number of strings in use */
typedef long ls_nstr;
/* chars used as small naturals (so that `char' is reserved for characters) */
typedef unsigned char lu_byte;
#define MAX_SIZET ((size_t)(~(size_t)0)-2)
#define MAX_INT (INT_MAX-2) /* maximum value of an int (-2 for safety) */
/*
** conversion of pointer to integer
** this is for hashing only; there is no problem if the integer
** cannot hold the whole pointer value
*/
#define IntPoint(p) ((lu_hash)(p))
/* type to ensure maximum alignment */
#ifndef LUSER_ALIGNMENT_T
typedef union { double u; void *s; long l; } L_Umaxalign;
#else
typedef LUSER_ALIGNMENT_T L_Umaxalign;
#endif
/* result of `usual argument conversion' over lua_Number */
#ifndef LUA_UACNUMBER
typedef double l_uacNumber;
#else
typedef LUA_UACNUMBER l_uacNumber;
#endif
#ifndef lua_assert
#define lua_assert(c) /* empty */
#endif
#ifndef check_exp
#define check_exp(c,e) (e)
#endif
#ifndef UNUSED
#define UNUSED(x) ((void)(x)) /* to avoid warnings */
#endif
#ifndef cast
#define cast(t, exp) ((t)(exp))
#endif
/*
** type for virtual-machine instructions
** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h)
*/
typedef unsigned long Instruction;
/* maximum depth for calls (unsigned short) */
#ifndef LUA_MAXCALLS
#define LUA_MAXCALLS 4096
#endif
/*
** maximum depth for C calls (unsigned short): Not too big, or may
** overflow the C stack...
*/
#ifndef LUA_MAXCCALLS
#define LUA_MAXCCALLS 200
#endif
/* maximum size for the C stack */
#ifndef LUA_MAXCSTACK
#define LUA_MAXCSTACK 2048
#endif
/* maximum stack for a Lua function */
#define MAXSTACK 250
/* maximum number of variables declared in a function */
#ifndef MAXVARS
#define MAXVARS 200 /* arbitrary limit (<MAXSTACK) */
#endif
/* maximum number of upvalues per function */
#ifndef MAXUPVALUES
#define MAXUPVALUES 32
#endif
/* maximum number of parameters in a function */
#ifndef MAXPARAMS
#define MAXPARAMS 100 /* arbitrary limit (<MAXLOCALS) */
#endif
/* minimum size for the string table (must be power of 2) */
#ifndef MINSTRTABSIZE
#define MINSTRTABSIZE 32
#endif
/* minimum size for string buffer */
#ifndef LUA_MINBUFFER
#define LUA_MINBUFFER 32
#endif
/*
** maximum number of syntactical nested non-terminals: Not too big,
** or may overflow the C stack...
*/
#ifndef LUA_MAXPARSERLEVEL
#define LUA_MAXPARSERLEVEL 200
#endif
#endif

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/*
** $Id: lmem.c,v 1.61 2002/12/04 17:38:31 roberto Exp $
** Interface to Memory Manager
** See Copyright Notice in lua.h
*/
#include <stdlib.h>
#define lmem_c
#include "lua.h"
#include "ldebug.h"
#include "ldo.h"
#include "lmem.h"
#include "lobject.h"
#include "lstate.h"
/*
** definition for realloc function. It must assure that l_realloc(NULL,
** 0, x) allocates a new block (ANSI C assures that). (`os' is the old
** block size; some allocators may use that.)
*/
#ifndef l_realloc
#define l_realloc(b,os,s) realloc(b,s)
#endif
/*
** definition for free function. (`os' is the old block size; some
** allocators may use that.)
*/
#ifndef l_free
#define l_free(b,os) free(b)
#endif
#define MINSIZEARRAY 4
void *luaM_growaux (lua_State *L, void *block, int *size, int size_elems,
int limit, const char *errormsg) {
void *newblock;
int newsize = (*size)*2;
if (newsize < MINSIZEARRAY)
newsize = MINSIZEARRAY; /* minimum size */
else if (*size >= limit/2) { /* cannot double it? */
if (*size < limit - MINSIZEARRAY) /* try something smaller... */
newsize = limit; /* still have at least MINSIZEARRAY free places */
else luaG_runerror(L, errormsg);
}
newblock = luaM_realloc(L, block,
cast(lu_mem, *size)*cast(lu_mem, size_elems),
cast(lu_mem, newsize)*cast(lu_mem, size_elems));
*size = newsize; /* update only when everything else is OK */
return newblock;
}
/*
** generic allocation routine.
*/
void *luaM_realloc (lua_State *L, void *block, lu_mem oldsize, lu_mem size) {
lua_assert((oldsize == 0) == (block == NULL));
if (size == 0) {
if (block != NULL) {
l_free(block, oldsize);
block = NULL;
}
else return NULL; /* avoid `nblocks' computations when oldsize==size==0 */
}
else if (size >= MAX_SIZET)
luaG_runerror(L, "memory allocation error: block too big");
else {
block = l_realloc(block, oldsize, size);
if (block == NULL) {
if (L)
luaD_throw(L, LUA_ERRMEM);
else return NULL; /* error before creating state! */
}
}
if (L) {
lua_assert(G(L) != NULL && G(L)->nblocks > 0);
G(L)->nblocks -= oldsize;
G(L)->nblocks += size;
}
return block;
}

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/*
** $Id: lmem.h,v 1.26 2002/05/01 20:40:42 roberto Exp $
** Interface to Memory Manager
** See Copyright Notice in lua.h
*/
#ifndef lmem_h
#define lmem_h
#include <stddef.h>
#include "llimits.h"
#include "lua.h"
#define MEMERRMSG "not enough memory"
void *luaM_realloc (lua_State *L, void *oldblock, lu_mem oldsize, lu_mem size);
void *luaM_growaux (lua_State *L, void *block, int *size, int size_elem,
int limit, const char *errormsg);
#define luaM_free(L, b, s) luaM_realloc(L, (b), (s), 0)
#define luaM_freelem(L, b) luaM_realloc(L, (b), sizeof(*(b)), 0)
#define luaM_freearray(L, b, n, t) luaM_realloc(L, (b), \
cast(lu_mem, n)*cast(lu_mem, sizeof(t)), 0)
#define luaM_malloc(L, t) luaM_realloc(L, NULL, 0, (t))
#define luaM_new(L, t) cast(t *, luaM_malloc(L, sizeof(t)))
#define luaM_newvector(L, n,t) cast(t *, luaM_malloc(L, \
cast(lu_mem, n)*cast(lu_mem, sizeof(t))))
#define luaM_growvector(L,v,nelems,size,t,limit,e) \
if (((nelems)+1) > (size)) \
((v)=cast(t *, luaM_growaux(L,v,&(size),sizeof(t),limit,e)))
#define luaM_reallocvector(L, v,oldn,n,t) \
((v)=cast(t *, luaM_realloc(L, v,cast(lu_mem, oldn)*cast(lu_mem, sizeof(t)), \
cast(lu_mem, n)*cast(lu_mem, sizeof(t)))))
#endif

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/*
** $Id: lobject.c,v 1.97 2003/04/03 13:35:34 roberto Exp $
** Some generic functions over Lua objects
** See Copyright Notice in lua.h
*/
#include <ctype.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#define lobject_c
#include "lua.h"
#include "ldo.h"
#include "lmem.h"
#include "lobject.h"
#include "lstate.h"
#include "lstring.h"
#include "lvm.h"
/* function to convert a string to a lua_Number */
#ifndef lua_str2number
#define lua_str2number(s,p) strtod((s), (p))
#endif
const TObject luaO_nilobject = {LUA_TNIL, {NULL}};
/*
** converts an integer to a "floating point byte", represented as
** (mmmmmxxx), where the real value is (xxx) * 2^(mmmmm)
*/
int luaO_int2fb (unsigned int x) {
int m = 0; /* mantissa */
while (x >= (1<<3)) {
x = (x+1) >> 1;
m++;
}
return (m << 3) | cast(int, x);
}
int luaO_log2 (unsigned int x) {
static const lu_byte log_8[255] = {
0,
1,1,
2,2,2,2,
3,3,3,3,3,3,3,3,
4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
};
if (x >= 0x00010000) {
if (x >= 0x01000000) return log_8[((x>>24) & 0xff) - 1]+24;
else return log_8[((x>>16) & 0xff) - 1]+16;
}
else {
if (x >= 0x00000100) return log_8[((x>>8) & 0xff) - 1]+8;
else if (x) return log_8[(x & 0xff) - 1];
return -1; /* special `log' for 0 */
}
}
int luaO_rawequalObj (const TObject *t1, const TObject *t2) {
if (ttype(t1) != ttype(t2)) return 0;
else switch (ttype(t1)) {
case LUA_TNIL:
return 1;
case LUA_TNUMBER:
return nvalue(t1) == nvalue(t2);
case LUA_TBOOLEAN:
return bvalue(t1) == bvalue(t2); /* boolean true must be 1 !! */
case LUA_TLIGHTUSERDATA:
return pvalue(t1) == pvalue(t2);
default:
lua_assert(iscollectable(t1));
return gcvalue(t1) == gcvalue(t2);
}
}
int luaO_str2d (const char *s, lua_Number *result) {
char *endptr;
lua_Number res = lua_str2number(s, &endptr);
if (endptr == s) return 0; /* no conversion */
while (isspace((unsigned char)(*endptr))) endptr++;
if (*endptr != '\0') return 0; /* invalid trailing characters? */
*result = res;
return 1;
}
static void pushstr (lua_State *L, const char *str) {
setsvalue2s(L->top, luaS_new(L, str));
incr_top(L);
}
/* this function handles only `%d', `%c', %f, and `%s' formats */
const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
int n = 1;
pushstr(L, "");
for (;;) {
const char *e = strchr(fmt, '%');
if (e == NULL) break;
setsvalue2s(L->top, luaS_newlstr(L, fmt, e-fmt));
incr_top(L);
switch (*(e+1)) {
case 's':
pushstr(L, va_arg(argp, char *));
break;
case 'c': {
char buff[2];
buff[0] = cast(char, va_arg(argp, int));
buff[1] = '\0';
pushstr(L, buff);
break;
}
case 'd':
setnvalue(L->top, cast(lua_Number, va_arg(argp, int)));
incr_top(L);
break;
case 'f':
setnvalue(L->top, cast(lua_Number, va_arg(argp, l_uacNumber)));
incr_top(L);
break;
case '%':
pushstr(L, "%");
break;
default: lua_assert(0);
}
n += 2;
fmt = e+2;
}
pushstr(L, fmt);
luaV_concat(L, n+1, L->top - L->base - 1);
L->top -= n;
return svalue(L->top - 1);
}
const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) {
const char *msg;
va_list argp;
va_start(argp, fmt);
msg = luaO_pushvfstring(L, fmt, argp);
va_end(argp);
return msg;
}
void luaO_chunkid (char *out, const char *source, int bufflen) {
if (*source == '=') {
strncpy(out, source+1, bufflen); /* remove first char */
out[bufflen-1] = '\0'; /* ensures null termination */
}
else { /* out = "source", or "...source" */
if (*source == '@') {
int l;
source++; /* skip the `@' */
bufflen -= sizeof(" `...' ");
l = strlen(source);
strcpy(out, "");
if (l>bufflen) {
source += (l-bufflen); /* get last part of file name */
strcat(out, "...");
}
strcat(out, source);
}
else { /* out = [string "string"] */
int len = strcspn(source, "\n"); /* stop at first newline */
bufflen -= sizeof(" [string \"...\"] ");
if (len > bufflen) len = bufflen;
strcpy(out, "[string \"");
if (source[len] != '\0') { /* must truncate? */
strncat(out, source, len);
strcat(out, "...");
}
else
strcat(out, source);
strcat(out, "\"]");
}
}
}

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/*
** $Id: lobject.h,v 1.159 2003/03/18 12:50:04 roberto Exp $
** Type definitions for Lua objects
** See Copyright Notice in lua.h
*/
#ifndef lobject_h
#define lobject_h
#include "llimits.h"
#include "lua.h"
/* tags for values visible from Lua */
#define NUM_TAGS LUA_TTHREAD
/*
** Extra tags for non-values
*/
#define LUA_TPROTO (NUM_TAGS+1)
#define LUA_TUPVAL (NUM_TAGS+2)
/*
** Union of all collectable objects
*/
typedef union GCObject GCObject;
/*
** Common Header for all collectable objects (in macro form, to be
** included in other objects)
*/
#define CommonHeader GCObject *next; lu_byte tt; lu_byte marked
/*
** Common header in struct form
*/
typedef struct GCheader {
CommonHeader;
} GCheader;
/*
** Union of all Lua values
*/
typedef union {
GCObject *gc;
void *p;
lua_Number n;
int b;
} Value;
/*
** Lua values (or `tagged objects')
*/
typedef struct lua_TObject {
int tt;
Value value;
} TObject;
/* Macros to test type */
#define ttisnil(o) (ttype(o) == LUA_TNIL)
#define ttisnumber(o) (ttype(o) == LUA_TNUMBER)
#define ttisstring(o) (ttype(o) == LUA_TSTRING)
#define ttistable(o) (ttype(o) == LUA_TTABLE)
#define ttisfunction(o) (ttype(o) == LUA_TFUNCTION)
#define ttisboolean(o) (ttype(o) == LUA_TBOOLEAN)
#define ttisuserdata(o) (ttype(o) == LUA_TUSERDATA)
#define ttisthread(o) (ttype(o) == LUA_TTHREAD)
#define ttislightuserdata(o) (ttype(o) == LUA_TLIGHTUSERDATA)
/* Macros to access values */
#define ttype(o) ((o)->tt)
#define gcvalue(o) check_exp(iscollectable(o), (o)->value.gc)
#define pvalue(o) check_exp(ttislightuserdata(o), (o)->value.p)
#define nvalue(o) check_exp(ttisnumber(o), (o)->value.n)
#define tsvalue(o) check_exp(ttisstring(o), &(o)->value.gc->ts)
#define uvalue(o) check_exp(ttisuserdata(o), &(o)->value.gc->u)
#define clvalue(o) check_exp(ttisfunction(o), &(o)->value.gc->cl)
#define hvalue(o) check_exp(ttistable(o), &(o)->value.gc->h)
#define bvalue(o) check_exp(ttisboolean(o), (o)->value.b)
#define thvalue(o) check_exp(ttisthread(o), &(o)->value.gc->th)
#define l_isfalse(o) (ttisnil(o) || (ttisboolean(o) && bvalue(o) == 0))
/* Macros to set values */
#define setnvalue(obj,x) \
{ TObject *i_o=(obj); i_o->tt=LUA_TNUMBER; i_o->value.n=(x); }
#define chgnvalue(obj,x) \
check_exp(ttype(obj)==LUA_TNUMBER, (obj)->value.n=(x))
#define setpvalue(obj,x) \
{ TObject *i_o=(obj); i_o->tt=LUA_TLIGHTUSERDATA; i_o->value.p=(x); }
#define setbvalue(obj,x) \
{ TObject *i_o=(obj); i_o->tt=LUA_TBOOLEAN; i_o->value.b=(x); }
#define setsvalue(obj,x) \
{ TObject *i_o=(obj); i_o->tt=LUA_TSTRING; \
i_o->value.gc=cast(GCObject *, (x)); \
lua_assert(i_o->value.gc->gch.tt == LUA_TSTRING); }
#define setuvalue(obj,x) \
{ TObject *i_o=(obj); i_o->tt=LUA_TUSERDATA; \
i_o->value.gc=cast(GCObject *, (x)); \
lua_assert(i_o->value.gc->gch.tt == LUA_TUSERDATA); }
#define setthvalue(obj,x) \
{ TObject *i_o=(obj); i_o->tt=LUA_TTHREAD; \
i_o->value.gc=cast(GCObject *, (x)); \
lua_assert(i_o->value.gc->gch.tt == LUA_TTHREAD); }
#define setclvalue(obj,x) \
{ TObject *i_o=(obj); i_o->tt=LUA_TFUNCTION; \
i_o->value.gc=cast(GCObject *, (x)); \
lua_assert(i_o->value.gc->gch.tt == LUA_TFUNCTION); }
#define sethvalue(obj,x) \
{ TObject *i_o=(obj); i_o->tt=LUA_TTABLE; \
i_o->value.gc=cast(GCObject *, (x)); \
lua_assert(i_o->value.gc->gch.tt == LUA_TTABLE); }
#define setnilvalue(obj) ((obj)->tt=LUA_TNIL)
/*
** for internal debug only
*/
#define checkconsistency(obj) \
lua_assert(!iscollectable(obj) || (ttype(obj) == (obj)->value.gc->gch.tt))
#define setobj(obj1,obj2) \
{ const TObject *o2=(obj2); TObject *o1=(obj1); \
checkconsistency(o2); \
o1->tt=o2->tt; o1->value = o2->value; }
/*
** different types of sets, according to destination
*/
/* from stack to (same) stack */
#define setobjs2s setobj
/* to stack (not from same stack) */
#define setobj2s setobj
#define setsvalue2s setsvalue
/* from table to same table */
#define setobjt2t setobj
/* to table */
#define setobj2t setobj
/* to new object */
#define setobj2n setobj
#define setsvalue2n setsvalue
#define setttype(obj, tt) (ttype(obj) = (tt))
#define iscollectable(o) (ttype(o) >= LUA_TSTRING)
typedef TObject *StkId; /* index to stack elements */
/*
** String headers for string table
*/
typedef union TString {
L_Umaxalign dummy; /* ensures maximum alignment for strings */
struct {
CommonHeader;
lu_byte reserved;
lu_hash hash;
size_t len;
} tsv;
} TString;
#define getstr(ts) cast(const char *, (ts) + 1)
#define svalue(o) getstr(tsvalue(o))
typedef union Udata {
L_Umaxalign dummy; /* ensures maximum alignment for `local' udata */
struct {
CommonHeader;
struct Table *metatable;
size_t len;
} uv;
} Udata;
/*
** Function Prototypes
*/
typedef struct Proto {
CommonHeader;
TObject *k; /* constants used by the function */
Instruction *code;
struct Proto **p; /* functions defined inside the function */
int *lineinfo; /* map from opcodes to source lines */
struct LocVar *locvars; /* information about local variables */
TString **upvalues; /* upvalue names */
TString *source;
int sizeupvalues;
int sizek; /* size of `k' */
int sizecode;
int sizelineinfo;
int sizep; /* size of `p' */
int sizelocvars;
int lineDefined;
GCObject *gclist;
lu_byte nups; /* number of upvalues */
lu_byte numparams;
lu_byte is_vararg;
lu_byte maxstacksize;
} Proto;
typedef struct LocVar {
TString *varname;
int startpc; /* first point where variable is active */
int endpc; /* first point where variable is dead */
} LocVar;
/*
** Upvalues
*/
typedef struct UpVal {
CommonHeader;
TObject *v; /* points to stack or to its own value */
TObject value; /* the value (when closed) */
} UpVal;
/*
** Closures
*/
#define ClosureHeader \
CommonHeader; lu_byte isC; lu_byte nupvalues; GCObject *gclist
typedef struct CClosure {
ClosureHeader;
lua_CFunction f;
TObject upvalue[1];
} CClosure;
typedef struct LClosure {
ClosureHeader;
struct Proto *p;
TObject g; /* global table for this closure */
UpVal *upvals[1];
} LClosure;
typedef union Closure {
CClosure c;
LClosure l;
} Closure;
#define iscfunction(o) (ttype(o) == LUA_TFUNCTION && clvalue(o)->c.isC)
#define isLfunction(o) (ttype(o) == LUA_TFUNCTION && !clvalue(o)->c.isC)
/*
** Tables
*/
typedef struct Node {
TObject i_key;
TObject i_val;
struct Node *next; /* for chaining */
} Node;
typedef struct Table {
CommonHeader;
lu_byte flags; /* 1<<p means tagmethod(p) is not present */
lu_byte lsizenode; /* log2 of size of `node' array */
struct Table *metatable;
TObject *array; /* array part */
Node *node;
Node *firstfree; /* this position is free; all positions after it are full */
GCObject *gclist;
int sizearray; /* size of `array' array */
} Table;
/*
** `module' operation for hashing (size is always a power of 2)
*/
#define lmod(s,size) \
check_exp((size&(size-1))==0, (cast(int, (s) & ((size)-1))))
#define twoto(x) (1<<(x))
#define sizenode(t) (twoto((t)->lsizenode))
extern const TObject luaO_nilobject;
int luaO_log2 (unsigned int x);
int luaO_int2fb (unsigned int x);
#define fb2int(x) (((x) & 7) << ((x) >> 3))
int luaO_rawequalObj (const TObject *t1, const TObject *t2);
int luaO_str2d (const char *s, lua_Number *result);
const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp);
const char *luaO_pushfstring (lua_State *L, const char *fmt, ...);
void luaO_chunkid (char *out, const char *source, int len);
#endif

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/*
** $Id: lopcodes.c,v 1.22 2002/12/04 17:38:31 roberto Exp $
** extracted automatically from lopcodes.h by mkprint.lua
** DO NOT EDIT
** See Copyright Notice in lua.h
*/
#define lopcodes_c
#include "lua.h"
#include "lobject.h"
#include "lopcodes.h"
#ifdef LUA_OPNAMES
const char *const luaP_opnames[] = {
"MOVE",
"LOADK",
"LOADBOOL",
"LOADNIL",
"GETUPVAL",
"GETGLOBAL",
"GETTABLE",
"SETGLOBAL",
"SETUPVAL",
"SETTABLE",
"NEWTABLE",
"SELF",
"ADD",
"SUB",
"MUL",
"DIV",
"POW",
"UNM",
"NOT",
"CONCAT",
"JMP",
"EQ",
"LT",
"LE",
"TEST",
"CALL",
"TAILCALL",
"RETURN",
"FORLOOP",
"TFORLOOP",
"TFORPREP",
"SETLIST",
"SETLISTO",
"CLOSE",
"CLOSURE"
};
#endif
#define opmode(t,b,bk,ck,sa,k,m) (((t)<<OpModeT) | \
((b)<<OpModeBreg) | ((bk)<<OpModeBrk) | ((ck)<<OpModeCrk) | \
((sa)<<OpModesetA) | ((k)<<OpModeK) | (m))
const lu_byte luaP_opmodes[NUM_OPCODES] = {
/* T B Bk Ck sA K mode opcode */
opmode(0, 1, 0, 0, 1, 0, iABC) /* OP_MOVE */
,opmode(0, 0, 0, 0, 1, 1, iABx) /* OP_LOADK */
,opmode(0, 0, 0, 0, 1, 0, iABC) /* OP_LOADBOOL */
,opmode(0, 1, 0, 0, 1, 0, iABC) /* OP_LOADNIL */
,opmode(0, 0, 0, 0, 1, 0, iABC) /* OP_GETUPVAL */
,opmode(0, 0, 0, 0, 1, 1, iABx) /* OP_GETGLOBAL */
,opmode(0, 1, 0, 1, 1, 0, iABC) /* OP_GETTABLE */
,opmode(0, 0, 0, 0, 0, 1, iABx) /* OP_SETGLOBAL */
,opmode(0, 0, 0, 0, 0, 0, iABC) /* OP_SETUPVAL */
,opmode(0, 0, 1, 1, 0, 0, iABC) /* OP_SETTABLE */
,opmode(0, 0, 0, 0, 1, 0, iABC) /* OP_NEWTABLE */
,opmode(0, 1, 0, 1, 1, 0, iABC) /* OP_SELF */
,opmode(0, 0, 1, 1, 1, 0, iABC) /* OP_ADD */
,opmode(0, 0, 1, 1, 1, 0, iABC) /* OP_SUB */
,opmode(0, 0, 1, 1, 1, 0, iABC) /* OP_MUL */
,opmode(0, 0, 1, 1, 1, 0, iABC) /* OP_DIV */
,opmode(0, 0, 1, 1, 1, 0, iABC) /* OP_POW */
,opmode(0, 1, 0, 0, 1, 0, iABC) /* OP_UNM */
,opmode(0, 1, 0, 0, 1, 0, iABC) /* OP_NOT */
,opmode(0, 1, 0, 1, 1, 0, iABC) /* OP_CONCAT */
,opmode(0, 0, 0, 0, 0, 0, iAsBx) /* OP_JMP */
,opmode(1, 0, 1, 1, 0, 0, iABC) /* OP_EQ */
,opmode(1, 0, 1, 1, 0, 0, iABC) /* OP_LT */
,opmode(1, 0, 1, 1, 0, 0, iABC) /* OP_LE */
,opmode(1, 1, 0, 0, 1, 0, iABC) /* OP_TEST */
,opmode(0, 0, 0, 0, 0, 0, iABC) /* OP_CALL */
,opmode(0, 0, 0, 0, 0, 0, iABC) /* OP_TAILCALL */
,opmode(0, 0, 0, 0, 0, 0, iABC) /* OP_RETURN */
,opmode(0, 0, 0, 0, 0, 0, iAsBx) /* OP_FORLOOP */
,opmode(1, 0, 0, 0, 0, 0, iABC) /* OP_TFORLOOP */
,opmode(0, 0, 0, 0, 0, 0, iAsBx) /* OP_TFORPREP */
,opmode(0, 0, 0, 0, 0, 0, iABx) /* OP_SETLIST */
,opmode(0, 0, 0, 0, 0, 0, iABx) /* OP_SETLISTO */
,opmode(0, 0, 0, 0, 0, 0, iABC) /* OP_CLOSE */
,opmode(0, 0, 0, 0, 1, 0, iABx) /* OP_CLOSURE */
};

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/*
** $Id: lopcodes.h,v 1.102 2002/08/21 18:56:09 roberto Exp $
** Opcodes for Lua virtual machine
** See Copyright Notice in lua.h
*/
#ifndef lopcodes_h
#define lopcodes_h
#include "llimits.h"
/*===========================================================================
We assume that instructions are unsigned numbers.
All instructions have an opcode in the first 6 bits.
Instructions can have the following fields:
`A' : 8 bits
`B' : 9 bits
`C' : 9 bits
`Bx' : 18 bits (`B' and `C' together)
`sBx' : signed Bx
A signed argument is represented in excess K; that is, the number
value is the unsigned value minus K. K is exactly the maximum value
for that argument (so that -max is represented by 0, and +max is
represented by 2*max), which is half the maximum for the corresponding
unsigned argument.
===========================================================================*/
enum OpMode {iABC, iABx, iAsBx}; /* basic instruction format */
/*
** size and position of opcode arguments.
*/
#define SIZE_C 9
#define SIZE_B 9
#define SIZE_Bx (SIZE_C + SIZE_B)
#define SIZE_A 8
#define SIZE_OP 6
#define POS_C SIZE_OP
#define POS_B (POS_C + SIZE_C)
#define POS_Bx POS_C
#define POS_A (POS_B + SIZE_B)
/*
** limits for opcode arguments.
** we use (signed) int to manipulate most arguments,
** so they must fit in BITS_INT-1 bits (-1 for sign)
*/
#if SIZE_Bx < BITS_INT-1
#define MAXARG_Bx ((1<<SIZE_Bx)-1)
#define MAXARG_sBx (MAXARG_Bx>>1) /* `sBx' is signed */
#else
#define MAXARG_Bx MAX_INT
#define MAXARG_sBx MAX_INT
#endif
#define MAXARG_A ((1<<SIZE_A)-1)
#define MAXARG_B ((1<<SIZE_B)-1)
#define MAXARG_C ((1<<SIZE_C)-1)
/* creates a mask with `n' 1 bits at position `p' */
#define MASK1(n,p) ((~((~(Instruction)0)<<n))<<p)
/* creates a mask with `n' 0 bits at position `p' */
#define MASK0(n,p) (~MASK1(n,p))
/*
** the following macros help to manipulate instructions
*/
#define GET_OPCODE(i) (cast(OpCode, (i)&MASK1(SIZE_OP,0)))
#define SET_OPCODE(i,o) ((i) = (((i)&MASK0(SIZE_OP,0)) | cast(Instruction, o)))
#define GETARG_A(i) (cast(int, (i)>>POS_A))
#define SETARG_A(i,u) ((i) = (((i)&MASK0(SIZE_A,POS_A)) | \
((cast(Instruction, u)<<POS_A)&MASK1(SIZE_A,POS_A))))
#define GETARG_B(i) (cast(int, ((i)>>POS_B) & MASK1(SIZE_B,0)))
#define SETARG_B(i,b) ((i) = (((i)&MASK0(SIZE_B,POS_B)) | \
((cast(Instruction, b)<<POS_B)&MASK1(SIZE_B,POS_B))))
#define GETARG_C(i) (cast(int, ((i)>>POS_C) & MASK1(SIZE_C,0)))
#define SETARG_C(i,b) ((i) = (((i)&MASK0(SIZE_C,POS_C)) | \
((cast(Instruction, b)<<POS_C)&MASK1(SIZE_C,POS_C))))
#define GETARG_Bx(i) (cast(int, ((i)>>POS_Bx) & MASK1(SIZE_Bx,0)))
#define SETARG_Bx(i,b) ((i) = (((i)&MASK0(SIZE_Bx,POS_Bx)) | \
((cast(Instruction, b)<<POS_Bx)&MASK1(SIZE_Bx,POS_Bx))))
#define GETARG_sBx(i) (GETARG_Bx(i)-MAXARG_sBx)
#define SETARG_sBx(i,b) SETARG_Bx((i),cast(unsigned int, (b)+MAXARG_sBx))
#define CREATE_ABC(o,a,b,c) (cast(Instruction, o) \
| (cast(Instruction, a)<<POS_A) \
| (cast(Instruction, b)<<POS_B) \
| (cast(Instruction, c)<<POS_C))
#define CREATE_ABx(o,a,bc) (cast(Instruction, o) \
| (cast(Instruction, a)<<POS_A) \
| (cast(Instruction, bc)<<POS_Bx))
/*
** invalid register that fits in 8 bits
*/
#define NO_REG MAXARG_A
/*
** R(x) - register
** Kst(x) - constant (in constant table)
** RK(x) == if x < MAXSTACK then R(x) else Kst(x-MAXSTACK)
*/
/*
** grep "ORDER OP" if you change these enums
*/
typedef enum {
/*----------------------------------------------------------------------
name args description
------------------------------------------------------------------------*/
OP_MOVE,/* A B R(A) := R(B) */
OP_LOADK,/* A Bx R(A) := Kst(Bx) */
OP_LOADBOOL,/* A B C R(A) := (Bool)B; if (C) PC++ */
OP_LOADNIL,/* A B R(A) := ... := R(B) := nil */
OP_GETUPVAL,/* A B R(A) := UpValue[B] */
OP_GETGLOBAL,/* A Bx R(A) := Gbl[Kst(Bx)] */
OP_GETTABLE,/* A B C R(A) := R(B)[RK(C)] */
OP_SETGLOBAL,/* A Bx Gbl[Kst(Bx)] := R(A) */
OP_SETUPVAL,/* A B UpValue[B] := R(A) */
OP_SETTABLE,/* A B C R(A)[RK(B)] := RK(C) */
OP_NEWTABLE,/* A B C R(A) := {} (size = B,C) */
OP_SELF,/* A B C R(A+1) := R(B); R(A) := R(B)[RK(C)] */
OP_ADD,/* A B C R(A) := RK(B) + RK(C) */
OP_SUB,/* A B C R(A) := RK(B) - RK(C) */
OP_MUL,/* A B C R(A) := RK(B) * RK(C) */
OP_DIV,/* A B C R(A) := RK(B) / RK(C) */
OP_POW,/* A B C R(A) := RK(B) ^ RK(C) */
OP_UNM,/* A B R(A) := -R(B) */
OP_NOT,/* A B R(A) := not R(B) */
OP_CONCAT,/* A B C R(A) := R(B).. ... ..R(C) */
OP_JMP,/* sBx PC += sBx */
OP_EQ,/* A B C if ((RK(B) == RK(C)) ~= A) then pc++ */
OP_LT,/* A B C if ((RK(B) < RK(C)) ~= A) then pc++ */
OP_LE,/* A B C if ((RK(B) <= RK(C)) ~= A) then pc++ */
OP_TEST,/* A B C if (R(B) <=> C) then R(A) := R(B) else pc++ */
OP_CALL,/* A B C R(A), ... ,R(A+C-2) := R(A)(R(A+1), ... ,R(A+B-1)) */
OP_TAILCALL,/* A B C return R(A)(R(A+1), ... ,R(A+B-1)) */
OP_RETURN,/* A B return R(A), ... ,R(A+B-2) (see note) */
OP_FORLOOP,/* A sBx R(A)+=R(A+2); if R(A) <?= R(A+1) then PC+= sBx */
OP_TFORLOOP,/* A C R(A+2), ... ,R(A+2+C) := R(A)(R(A+1), R(A+2));
if R(A+2) ~= nil then pc++ */
OP_TFORPREP,/* A sBx if type(R(A)) == table then R(A+1):=R(A), R(A):=next;
PC += sBx */
OP_SETLIST,/* A Bx R(A)[Bx-Bx%FPF+i] := R(A+i), 1 <= i <= Bx%FPF+1 */
OP_SETLISTO,/* A Bx */
OP_CLOSE,/* A close all variables in the stack up to (>=) R(A)*/
OP_CLOSURE/* A Bx R(A) := closure(KPROTO[Bx], R(A), ... ,R(A+n)) */
} OpCode;
#define NUM_OPCODES (cast(int, OP_CLOSURE+1))
/*===========================================================================
Notes:
(1) In OP_CALL, if (B == 0) then B = top. C is the number of returns - 1,
and can be 0: OP_CALL then sets `top' to last_result+1, so
next open instruction (OP_CALL, OP_RETURN, OP_SETLIST) may use `top'.
(2) In OP_RETURN, if (B == 0) then return up to `top'
(3) For comparisons, B specifies what conditions the test should accept.
(4) All `skips' (pc++) assume that next instruction is a jump
===========================================================================*/
/*
** masks for instruction properties
*/
enum OpModeMask {
OpModeBreg = 2, /* B is a register */
OpModeBrk, /* B is a register/constant */
OpModeCrk, /* C is a register/constant */
OpModesetA, /* instruction set register A */
OpModeK, /* Bx is a constant */
OpModeT /* operator is a test */
};
extern const lu_byte luaP_opmodes[NUM_OPCODES];
#define getOpMode(m) (cast(enum OpMode, luaP_opmodes[m] & 3))
#define testOpMode(m, b) (luaP_opmodes[m] & (1 << (b)))
#ifdef LUA_OPNAMES
extern const char *const luaP_opnames[]; /* opcode names */
#endif
/* number of list items to accumulate before a SETLIST instruction */
/* (must be a power of 2) */
#define LFIELDS_PER_FLUSH 32
#endif

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/*
** $Id: lparser.h,v 1.47 2003/02/11 10:46:24 roberto Exp $
** Lua Parser
** See Copyright Notice in lua.h
*/
#ifndef lparser_h
#define lparser_h
#include "llimits.h"
#include "lobject.h"
#include "ltable.h"
#include "lzio.h"
/*
** Expression descriptor
*/
typedef enum {
VVOID, /* no value */
VNIL,
VTRUE,
VFALSE,
VK, /* info = index of constant in `k' */
VLOCAL, /* info = local register */
VUPVAL, /* info = index of upvalue in `upvalues' */
VGLOBAL, /* info = index of table; aux = index of global name in `k' */
VINDEXED, /* info = table register; aux = index register (or `k') */
VJMP, /* info = instruction pc */
VRELOCABLE, /* info = instruction pc */
VNONRELOC, /* info = result register */
VCALL /* info = result register */
} expkind;
typedef struct expdesc {
expkind k;
int info, aux;
int t; /* patch list of `exit when true' */
int f; /* patch list of `exit when false' */
} expdesc;
struct BlockCnt; /* defined in lparser.c */
/* state needed to generate code for a given function */
typedef struct FuncState {
Proto *f; /* current function header */
Table *h; /* table to find (and reuse) elements in `k' */
struct FuncState *prev; /* enclosing function */
struct LexState *ls; /* lexical state */
struct lua_State *L; /* copy of the Lua state */
struct BlockCnt *bl; /* chain of current blocks */
int pc; /* next position to code (equivalent to `ncode') */
int lasttarget; /* `pc' of last `jump target' */
int jpc; /* list of pending jumps to `pc' */
int freereg; /* first free register */
int nk; /* number of elements in `k' */
int np; /* number of elements in `p' */
int nlocvars; /* number of elements in `locvars' */
int nactvar; /* number of active local variables */
expdesc upvalues[MAXUPVALUES]; /* upvalues */
int actvar[MAXVARS]; /* declared-variable stack */
} FuncState;
Proto *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff);
#endif

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/*
** $Id: lstate.c,v 1.123 2003/04/03 13:35:34 roberto Exp $
** Global State
** See Copyright Notice in lua.h
*/
#include <stdlib.h>
#define lstate_c
#include "lua.h"
#include "ldebug.h"
#include "ldo.h"
#include "lfunc.h"
#include "lgc.h"
#include "llex.h"
#include "lmem.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "ltm.h"
/*
** macro to allow the inclusion of user information in Lua state
*/
#ifndef LUA_USERSTATE
#define EXTRASPACE 0
#else
union UEXTRASPACE {L_Umaxalign a; LUA_USERSTATE b;};
#define EXTRASPACE (sizeof(union UEXTRASPACE))
#endif
/*
** you can change this function through the official API:
** call `lua_setpanicf'
*/
static int default_panic (lua_State *L) {
UNUSED(L);
return 0;
}
static lua_State *mallocstate (lua_State *L) {
lu_byte *block = (lu_byte *)luaM_malloc(L, sizeof(lua_State) + EXTRASPACE);
if (block == NULL) return NULL;
else {
block += EXTRASPACE;
return cast(lua_State *, block);
}
}
static void freestate (lua_State *L, lua_State *L1) {
luaM_free(L, cast(lu_byte *, L1) - EXTRASPACE,
sizeof(lua_State) + EXTRASPACE);
}
static void stack_init (lua_State *L1, lua_State *L) {
L1->stack = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, TObject);
L1->stacksize = BASIC_STACK_SIZE + EXTRA_STACK;
L1->top = L1->stack;
L1->stack_last = L1->stack+(L1->stacksize - EXTRA_STACK)-1;
L1->base_ci = luaM_newvector(L, BASIC_CI_SIZE, CallInfo);
L1->ci = L1->base_ci;
L1->ci->state = CI_C; /* not a Lua function */
setnilvalue(L1->top++); /* `function' entry for this `ci' */
L1->base = L1->ci->base = L1->top;
L1->ci->top = L1->top + LUA_MINSTACK;
L1->size_ci = BASIC_CI_SIZE;
L1->end_ci = L1->base_ci + L1->size_ci;
}
static void freestack (lua_State *L, lua_State *L1) {
luaM_freearray(L, L1->base_ci, L1->size_ci, CallInfo);
luaM_freearray(L, L1->stack, L1->stacksize, TObject);
}
/*
** open parts that may cause memory-allocation errors
*/
static void f_luaopen (lua_State *L, void *ud) {
/* create a new global state */
global_State *g = luaM_new(NULL, global_State);
UNUSED(ud);
if (g == NULL) luaD_throw(L, LUA_ERRMEM);
L->l_G = g;
g->mainthread = L;
g->GCthreshold = 0; /* mark it as unfinished state */
g->strt.size = 0;
g->strt.nuse = 0;
g->strt.hash = NULL;
setnilvalue(defaultmeta(L));
setnilvalue(registry(L));
luaZ_initbuffer(L, &g->buff);
g->panic = default_panic;
g->rootgc = NULL;
g->rootudata = NULL;
g->tmudata = NULL;
setnilvalue(gkey(g->dummynode));
setnilvalue(gval(g->dummynode));
g->dummynode->next = NULL;
g->nblocks = sizeof(lua_State) + sizeof(global_State);
stack_init(L, L); /* init stack */
/* create default meta table with a dummy table, and then close the loop */
defaultmeta(L)->tt = LUA_TTABLE;
sethvalue(defaultmeta(L), luaH_new(L, 0, 0));
hvalue(defaultmeta(L))->metatable = hvalue(defaultmeta(L));
sethvalue(gt(L), luaH_new(L, 0, 4)); /* table of globals */
sethvalue(registry(L), luaH_new(L, 4, 4)); /* registry */
luaS_resize(L, MINSTRTABSIZE); /* initial size of string table */
luaT_init(L);
luaX_init(L);
luaS_fix(luaS_newliteral(L, MEMERRMSG));
g->GCthreshold = 4*G(L)->nblocks;
}
static void preinit_state (lua_State *L) {
L->stack = NULL;
L->stacksize = 0;
L->errorJmp = NULL;
L->hook = NULL;
L->hookmask = L->hookinit = 0;
L->basehookcount = 0;
L->allowhook = 1;
resethookcount(L);
L->openupval = NULL;
L->size_ci = 0;
L->nCcalls = 0;
L->base_ci = L->ci = NULL;
L->errfunc = 0;
setnilvalue(gt(L));
}
static void close_state (lua_State *L) {
luaF_close(L, L->stack); /* close all upvalues for this thread */
if (G(L)) { /* close global state */
luaC_sweep(L, 1); /* collect all elements */
lua_assert(G(L)->rootgc == NULL);
lua_assert(G(L)->rootudata == NULL);
luaS_freeall(L);
luaZ_freebuffer(L, &G(L)->buff);
}
freestack(L, L);
if (G(L)) {
lua_assert(G(L)->nblocks == sizeof(lua_State) + sizeof(global_State));
luaM_freelem(NULL, G(L));
}
freestate(NULL, L);
}
lua_State *luaE_newthread (lua_State *L) {
lua_State *L1 = mallocstate(L);
luaC_link(L, valtogco(L1), LUA_TTHREAD);
preinit_state(L1);
L1->l_G = L->l_G;
stack_init(L1, L); /* init stack */
setobj2n(gt(L1), gt(L)); /* share table of globals */
return L1;
}
void luaE_freethread (lua_State *L, lua_State *L1) {
luaF_close(L1, L1->stack); /* close all upvalues for this thread */
lua_assert(L1->openupval == NULL);
freestack(L, L1);
freestate(L, L1);
}
LUA_API lua_State *lua_open (void) {
lua_State *L = mallocstate(NULL);
if (L) { /* allocation OK? */
L->tt = LUA_TTHREAD;
L->marked = 0;
L->next = L->gclist = NULL;
preinit_state(L);
L->l_G = NULL;
if (luaD_rawrunprotected(L, f_luaopen, NULL) != 0) {
/* memory allocation error: free partial state */
close_state(L);
L = NULL;
}
}
lua_userstateopen(L);
return L;
}
static void callallgcTM (lua_State *L, void *ud) {
UNUSED(ud);
luaC_callGCTM(L); /* call GC metamethods for all udata */
}
LUA_API void lua_close (lua_State *L) {
lua_lock(L);
L = G(L)->mainthread; /* only the main thread can be closed */
luaF_close(L, L->stack); /* close all upvalues for this thread */
luaC_separateudata(L); /* separate udata that have GC metamethods */
L->errfunc = 0; /* no error function during GC metamethods */
do { /* repeat until no more errors */
L->ci = L->base_ci;
L->base = L->top = L->ci->base;
L->nCcalls = 0;
} while (luaD_rawrunprotected(L, callallgcTM, NULL) != 0);
lua_assert(G(L)->tmudata == NULL);
close_state(L);
}

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/*
** $Id: lstate.h,v 1.109 2003/02/27 11:52:30 roberto Exp $
** Global State
** See Copyright Notice in lua.h
*/
#ifndef lstate_h
#define lstate_h
#include "lua.h"
#include "lobject.h"
#include "ltm.h"
#include "lzio.h"
/*
** macros for thread synchronization inside Lua core machine:
** all accesses to the global state and to global objects are synchronized.
** Because threads can read the stack of other threads
** (when running garbage collection),
** a thread must also synchronize any write-access to its own stack.
** Unsynchronized accesses are allowed only when reading its own stack,
** or when reading immutable fields from global objects
** (such as string values and udata values).
*/
#ifndef lua_lock
#define lua_lock(L) ((void) 0)
#endif
#ifndef lua_unlock
#define lua_unlock(L) ((void) 0)
#endif
#ifndef lua_userstateopen
#define lua_userstateopen(l)
#endif
struct lua_longjmp; /* defined in ldo.c */
/* default meta table (both for tables and udata) */
#define defaultmeta(L) (&G(L)->_defaultmeta)
/* table of globals */
#define gt(L) (&L->_gt)
/* registry */
#define registry(L) (&G(L)->_registry)
/* extra stack space to handle TM calls and some other extras */
#define EXTRA_STACK 5
#define BASIC_CI_SIZE 8
#define BASIC_STACK_SIZE (2*LUA_MINSTACK)
typedef struct stringtable {
GCObject **hash;
ls_nstr nuse; /* number of elements */
int size;
} stringtable;
/*
** informations about a call
*/
typedef struct CallInfo {
StkId base; /* base for called function */
StkId top; /* top for this function */
int state; /* bit fields; see below */
union {
struct { /* for Lua functions */
const Instruction *savedpc;
const Instruction **pc; /* points to `pc' variable in `luaV_execute' */
int tailcalls; /* number of tail calls lost under this entry */
} l;
struct { /* for C functions */
int dummy; /* just to avoid an empty struct */
} c;
} u;
} CallInfo;
/*
** bit fields for `CallInfo.state'
*/
#define CI_C (1<<0) /* 1 if function is a C function */
/* 1 if (Lua) function has an active `luaV_execute' running it */
#define CI_HASFRAME (1<<1)
/* 1 if Lua function is calling another Lua function (and therefore its
`pc' is being used by the other, and therefore CI_SAVEDPC is 1 too) */
#define CI_CALLING (1<<2)
#define CI_SAVEDPC (1<<3) /* 1 if `savedpc' is updated */
#define CI_YIELD (1<<4) /* 1 if thread is suspended */
#define ci_func(ci) (clvalue((ci)->base - 1))
/*
** `global state', shared by all threads of this state
*/
typedef struct global_State {
stringtable strt; /* hash table for strings */
GCObject *rootgc; /* list of (almost) all collectable objects */
GCObject *rootudata; /* (separated) list of all userdata */
GCObject *tmudata; /* list of userdata to be GC */
Mbuffer buff; /* temporary buffer for string concatentation */
lu_mem GCthreshold;
lu_mem nblocks; /* number of `bytes' currently allocated */
lua_CFunction panic; /* to be called in unprotected errors */
TObject _registry;
TObject _defaultmeta;
struct lua_State *mainthread;
Node dummynode[1]; /* common node array for all empty tables */
TString *tmname[TM_N]; /* array with tag-method names */
} global_State;
/*
** `per thread' state
*/
struct lua_State {
CommonHeader;
StkId top; /* first free slot in the stack */
StkId base; /* base of current function */
global_State *l_G;
CallInfo *ci; /* call info for current function */
StkId stack_last; /* last free slot in the stack */
StkId stack; /* stack base */
int stacksize;
CallInfo *end_ci; /* points after end of ci array*/
CallInfo *base_ci; /* array of CallInfo's */
unsigned short size_ci; /* size of array `base_ci' */
unsigned short nCcalls; /* number of nested C calls */
lu_byte hookmask;
lu_byte allowhook;
lu_byte hookinit;
int basehookcount;
int hookcount;
lua_Hook hook;
TObject _gt; /* table of globals */
GCObject *openupval; /* list of open upvalues in this stack */
GCObject *gclist;
struct lua_longjmp *errorJmp; /* current error recover point */
ptrdiff_t errfunc; /* current error handling function (stack index) */
};
#define G(L) (L->l_G)
/*
** Union of all collectable objects
*/
union GCObject {
GCheader gch;
union TString ts;
union Udata u;
union Closure cl;
struct Table h;
struct Proto p;
struct UpVal uv;
struct lua_State th; /* thread */
};
/* macros to convert a GCObject into a specific value */
#define gcotots(o) check_exp((o)->gch.tt == LUA_TSTRING, &((o)->ts))
#define gcotou(o) check_exp((o)->gch.tt == LUA_TUSERDATA, &((o)->u))
#define gcotocl(o) check_exp((o)->gch.tt == LUA_TFUNCTION, &((o)->cl))
#define gcotoh(o) check_exp((o)->gch.tt == LUA_TTABLE, &((o)->h))
#define gcotop(o) check_exp((o)->gch.tt == LUA_TPROTO, &((o)->p))
#define gcotouv(o) check_exp((o)->gch.tt == LUA_TUPVAL, &((o)->uv))
#define ngcotouv(o) \
check_exp((o) == NULL || (o)->gch.tt == LUA_TUPVAL, &((o)->uv))
#define gcototh(o) check_exp((o)->gch.tt == LUA_TTHREAD, &((o)->th))
/* macro to convert any value into a GCObject */
#define valtogco(v) (cast(GCObject *, (v)))
lua_State *luaE_newthread (lua_State *L);
void luaE_freethread (lua_State *L, lua_State *L1);
#endif

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/*
** $Id: lstring.c,v 1.78 2002/12/04 17:38:31 roberto Exp $
** String table (keeps all strings handled by Lua)
** See Copyright Notice in lua.h
*/
#include <string.h>
#define lstring_c
#include "lua.h"
#include "lmem.h"
#include "lobject.h"
#include "lstate.h"
#include "lstring.h"
void luaS_freeall (lua_State *L) {
lua_assert(G(L)->strt.nuse==0);
luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size, TString *);
}
void luaS_resize (lua_State *L, int newsize) {
GCObject **newhash = luaM_newvector(L, newsize, GCObject *);
stringtable *tb = &G(L)->strt;
int i;
for (i=0; i<newsize; i++) newhash[i] = NULL;
/* rehash */
for (i=0; i<tb->size; i++) {
GCObject *p = tb->hash[i];
while (p) { /* for each node in the list */
GCObject *next = p->gch.next; /* save next */
lu_hash h = gcotots(p)->tsv.hash;
int h1 = lmod(h, newsize); /* new position */
lua_assert(cast(int, h%newsize) == lmod(h, newsize));
p->gch.next = newhash[h1]; /* chain it */
newhash[h1] = p;
p = next;
}
}
luaM_freearray(L, tb->hash, tb->size, TString *);
tb->size = newsize;
tb->hash = newhash;
}
static TString *newlstr (lua_State *L, const char *str, size_t l, lu_hash h) {
TString *ts = cast(TString *, luaM_malloc(L, sizestring(l)));
stringtable *tb;
ts->tsv.len = l;
ts->tsv.hash = h;
ts->tsv.marked = 0;
ts->tsv.tt = LUA_TSTRING;
ts->tsv.reserved = 0;
memcpy(ts+1, str, l*sizeof(char));
((char *)(ts+1))[l] = '\0'; /* ending 0 */
tb = &G(L)->strt;
h = lmod(h, tb->size);
ts->tsv.next = tb->hash[h]; /* chain new entry */
tb->hash[h] = valtogco(ts);
tb->nuse++;
if (tb->nuse > cast(ls_nstr, tb->size) && tb->size <= MAX_INT/2)
luaS_resize(L, tb->size*2); /* too crowded */
return ts;
}
TString *luaS_newlstr (lua_State *L, const char *str, size_t l) {
GCObject *o;
lu_hash h = (lu_hash)l; /* seed */
size_t step = (l>>5)+1; /* if string is too long, don't hash all its chars */
size_t l1;
for (l1=l; l1>=step; l1-=step) /* compute hash */
h = h ^ ((h<<5)+(h>>2)+(unsigned char)(str[l1-1]));
for (o = G(L)->strt.hash[lmod(h, G(L)->strt.size)];
o != NULL;
o = o->gch.next) {
TString *ts = gcotots(o);
if (ts->tsv.len == l && (memcmp(str, getstr(ts), l) == 0))
return ts;
}
return newlstr(L, str, l, h); /* not found */
}
Udata *luaS_newudata (lua_State *L, size_t s) {
Udata *u;
u = cast(Udata *, luaM_malloc(L, sizeudata(s)));
u->uv.marked = (1<<1); /* is not finalized */
u->uv.tt = LUA_TUSERDATA;
u->uv.len = s;
u->uv.metatable = hvalue(defaultmeta(L));
/* chain it on udata list */
u->uv.next = G(L)->rootudata;
G(L)->rootudata = valtogco(u);
return u;
}

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/*
** $Id: lstring.h,v 1.37 2002/08/16 14:45:55 roberto Exp $
** String table (keep all strings handled by Lua)
** See Copyright Notice in lua.h
*/
#ifndef lstring_h
#define lstring_h
#include "lobject.h"
#include "lstate.h"
#define sizestring(l) (cast(lu_mem, sizeof(union TString))+ \
(cast(lu_mem, l)+1)*sizeof(char))
#define sizeudata(l) (cast(lu_mem, sizeof(union Udata))+(l))
#define luaS_new(L, s) (luaS_newlstr(L, s, strlen(s)))
#define luaS_newliteral(L, s) (luaS_newlstr(L, "" s, \
(sizeof(s)/sizeof(char))-1))
#define luaS_fix(s) ((s)->tsv.marked |= (1<<4))
void luaS_resize (lua_State *L, int newsize);
Udata *luaS_newudata (lua_State *L, size_t s);
void luaS_freeall (lua_State *L);
TString *luaS_newlstr (lua_State *L, const char *str, size_t l);
#endif

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/*
** $Id: ltable.c,v 1.132 2003/04/03 13:35:34 roberto Exp $
** Lua tables (hash)
** See Copyright Notice in lua.h
*/
/*
** Implementation of tables (aka arrays, objects, or hash tables).
** Tables keep its elements in two parts: an array part and a hash part.
** Non-negative integer keys are all candidates to be kept in the array
** part. The actual size of the array is the largest `n' such that at
** least half the slots between 0 and n are in use.
** Hash uses a mix of chained scatter table with Brent's variation.
** A main invariant of these tables is that, if an element is not
** in its main position (i.e. the `original' position that its hash gives
** to it), then the colliding element is in its own main position.
** In other words, there are collisions only when two elements have the
** same main position (i.e. the same hash values for that table size).
** Because of that, the load factor of these tables can be 100% without
** performance penalties.
*/
#include <string.h>
#define ltable_c
#include "lua.h"
#include "ldebug.h"
#include "ldo.h"
#include "lgc.h"
#include "lmem.h"
#include "lobject.h"
#include "lstate.h"
#include "ltable.h"
/*
** max size of array part is 2^MAXBITS
*/
#if BITS_INT > 26
#define MAXBITS 24
#else
#define MAXBITS (BITS_INT-2)
#endif
/* check whether `x' < 2^MAXBITS */
#define toobig(x) ((((x)-1) >> MAXBITS) != 0)
/* function to convert a lua_Number to int (with any rounding method) */
#ifndef lua_number2int
#define lua_number2int(i,n) ((i)=(int)(n))
#endif
#define hashpow2(t,n) (gnode(t, lmod((n), sizenode(t))))
#define hashstr(t,str) hashpow2(t, (str)->tsv.hash)
#define hashboolean(t,p) hashpow2(t, p)
/*
** for some types, it is better to avoid modulus by power of 2, as
** they tend to have many 2 factors.
*/
#define hashmod(t,n) (gnode(t, ((n) % ((sizenode(t)-1)|1))))
#define hashpointer(t,p) hashmod(t, IntPoint(p))
/*
** number of ints inside a lua_Number
*/
#define numints cast(int, sizeof(lua_Number)/sizeof(int))
/*
** hash for lua_Numbers
*/
static Node *hashnum (const Table *t, lua_Number n) {
unsigned int a[numints];
int i;
n += 1; /* normalize number (avoid -0) */
lua_assert(sizeof(a) <= sizeof(n));
memcpy(a, &n, sizeof(a));
for (i = 1; i < numints; i++) a[0] += a[i];
return hashmod(t, cast(lu_hash, a[0]));
}
/*
** returns the `main' position of an element in a table (that is, the index
** of its hash value)
*/
Node *luaH_mainposition (const Table *t, const TObject *key) {
switch (ttype(key)) {
case LUA_TNUMBER:
return hashnum(t, nvalue(key));
case LUA_TSTRING:
return hashstr(t, tsvalue(key));
case LUA_TBOOLEAN:
return hashboolean(t, bvalue(key));
case LUA_TLIGHTUSERDATA:
return hashpointer(t, pvalue(key));
default:
return hashpointer(t, gcvalue(key));
}
}
/*
** returns the index for `key' if `key' is an appropriate key to live in
** the array part of the table, -1 otherwise.
*/
static int arrayindex (const TObject *key) {
if (ttisnumber(key)) {
int k;
lua_number2int(k, (nvalue(key)));
if (cast(lua_Number, k) == nvalue(key) && k >= 1 && !toobig(k))
return k;
}
return -1; /* `key' did not match some condition */
}
/*
** returns the index of a `key' for table traversals. First goes all
** elements in the array part, then elements in the hash part. The
** beginning and end of a traversal are signalled by -1.
*/
static int luaH_index (lua_State *L, Table *t, StkId key) {
int i;
if (ttisnil(key)) return -1; /* first iteration */
i = arrayindex(key);
if (0 <= i && i <= t->sizearray) { /* is `key' inside array part? */
return i-1; /* yes; that's the index (corrected to C) */
}
else {
const TObject *v = luaH_get(t, key);
if (v == &luaO_nilobject)
luaG_runerror(L, "invalid key for `next'");
i = cast(int, (cast(const lu_byte *, v) -
cast(const lu_byte *, gval(gnode(t, 0)))) / sizeof(Node));
return i + t->sizearray; /* hash elements are numbered after array ones */
}
}
int luaH_next (lua_State *L, Table *t, StkId key) {
int i = luaH_index(L, t, key); /* find original element */
for (i++; i < t->sizearray; i++) { /* try first array part */
if (!ttisnil(&t->array[i])) { /* a non-nil value? */
setnvalue(key, cast(lua_Number, i+1));
setobj2s(key+1, &t->array[i]);
return 1;
}
}
for (i -= t->sizearray; i < sizenode(t); i++) { /* then hash part */
if (!ttisnil(gval(gnode(t, i)))) { /* a non-nil value? */
setobj2s(key, gkey(gnode(t, i)));
setobj2s(key+1, gval(gnode(t, i)));
return 1;
}
}
return 0; /* no more elements */
}
/*
** {=============================================================
** Rehash
** ==============================================================
*/
static void computesizes (int nums[], int ntotal, int *narray, int *nhash) {
int i;
int a = nums[0]; /* number of elements smaller than 2^i */
int na = a; /* number of elements to go to array part */
int n = (na == 0) ? -1 : 0; /* (log of) optimal size for array part */
for (i = 1; a < *narray && *narray >= twoto(i-1); i++) {
if (nums[i] > 0) {
a += nums[i];
if (a >= twoto(i-1)) { /* more than half elements in use? */
n = i;
na = a;
}
}
}
lua_assert(na <= *narray && *narray <= ntotal);
*nhash = ntotal - na;
*narray = (n == -1) ? 0 : twoto(n);
lua_assert(na <= *narray && na >= *narray/2);
}
static void numuse (const Table *t, int *narray, int *nhash) {
int nums[MAXBITS+1];
int i, lg;
int totaluse = 0;
/* count elements in array part */
for (i=0, lg=0; lg<=MAXBITS; lg++) { /* for each slice [2^(lg-1) to 2^lg) */
int ttlg = twoto(lg); /* 2^lg */
if (ttlg > t->sizearray) {
ttlg = t->sizearray;
if (i >= ttlg) break;
}
nums[lg] = 0;
for (; i<ttlg; i++) {
if (!ttisnil(&t->array[i])) {
nums[lg]++;
totaluse++;
}
}
}
for (; lg<=MAXBITS; lg++) nums[lg] = 0; /* reset other counts */
*narray = totaluse; /* all previous uses were in array part */
/* count elements in hash part */
i = sizenode(t);
while (i--) {
Node *n = &t->node[i];
if (!ttisnil(gval(n))) {
int k = arrayindex(gkey(n));
if (k >= 0) { /* is `key' an appropriate array index? */
nums[luaO_log2(k-1)+1]++; /* count as such */
(*narray)++;
}
totaluse++;
}
}
computesizes(nums, totaluse, narray, nhash);
}
static void setarrayvector (lua_State *L, Table *t, int size) {
int i;
luaM_reallocvector(L, t->array, t->sizearray, size, TObject);
for (i=t->sizearray; i<size; i++)
setnilvalue(&t->array[i]);
t->sizearray = size;
}
static void setnodevector (lua_State *L, Table *t, int lsize) {
int i;
int size = twoto(lsize);
if (lsize > MAXBITS)
luaG_runerror(L, "table overflow");
if (lsize == 0) { /* no elements to hash part? */
t->node = G(L)->dummynode; /* use common `dummynode' */
lua_assert(ttisnil(gkey(t->node))); /* assert invariants: */
lua_assert(ttisnil(gval(t->node)));
lua_assert(t->node->next == NULL); /* (`dummynode' must be empty) */
}
else {
t->node = luaM_newvector(L, size, Node);
for (i=0; i<size; i++) {
t->node[i].next = NULL;
setnilvalue(gkey(gnode(t, i)));
setnilvalue(gval(gnode(t, i)));
}
}
t->lsizenode = cast(lu_byte, lsize);
t->firstfree = gnode(t, size-1); /* first free position to be used */
}
static void resize (lua_State *L, Table *t, int nasize, int nhsize) {
int i;
int oldasize = t->sizearray;
int oldhsize = t->lsizenode;
Node *nold;
Node temp[1];
if (oldhsize)
nold = t->node; /* save old hash ... */
else { /* old hash is `dummynode' */
lua_assert(t->node == G(L)->dummynode);
temp[0] = t->node[0]; /* copy it to `temp' */
nold = temp;
setnilvalue(gkey(G(L)->dummynode)); /* restate invariant */
setnilvalue(gval(G(L)->dummynode));
lua_assert(G(L)->dummynode->next == NULL);
}
if (nasize > oldasize) /* array part must grow? */
setarrayvector(L, t, nasize);
/* create new hash part with appropriate size */
setnodevector(L, t, nhsize);
/* re-insert elements */
if (nasize < oldasize) { /* array part must shrink? */
t->sizearray = nasize;
/* re-insert elements from vanishing slice */
for (i=nasize; i<oldasize; i++) {
if (!ttisnil(&t->array[i]))
setobjt2t(luaH_setnum(L, t, i+1), &t->array[i]);
}
/* shrink array */
luaM_reallocvector(L, t->array, oldasize, nasize, TObject);
}
/* re-insert elements in hash part */
for (i = twoto(oldhsize) - 1; i >= 0; i--) {
Node *old = nold+i;
if (!ttisnil(gval(old)))
setobjt2t(luaH_set(L, t, gkey(old)), gval(old));
}
if (oldhsize)
luaM_freearray(L, nold, twoto(oldhsize), Node); /* free old array */
}
static void rehash (lua_State *L, Table *t) {
int nasize, nhsize;
numuse(t, &nasize, &nhsize); /* compute new sizes for array and hash parts */
resize(L, t, nasize, luaO_log2(nhsize)+1);
}
/*
** }=============================================================
*/
Table *luaH_new (lua_State *L, int narray, int lnhash) {
Table *t = luaM_new(L, Table);
luaC_link(L, valtogco(t), LUA_TTABLE);
t->metatable = hvalue(defaultmeta(L));
t->flags = cast(lu_byte, ~0);
/* temporary values (kept only if some malloc fails) */
t->array = NULL;
t->sizearray = 0;
t->lsizenode = 0;
t->node = NULL;
setarrayvector(L, t, narray);
setnodevector(L, t, lnhash);
return t;
}
void luaH_free (lua_State *L, Table *t) {
if (t->lsizenode)
luaM_freearray(L, t->node, sizenode(t), Node);
luaM_freearray(L, t->array, t->sizearray, TObject);
luaM_freelem(L, t);
}
#if 0
/*
** try to remove an element from a hash table; cannot move any element
** (because gc can call `remove' during a table traversal)
*/
void luaH_remove (Table *t, Node *e) {
Node *mp = luaH_mainposition(t, gkey(e));
if (e != mp) { /* element not in its main position? */
while (mp->next != e) mp = mp->next; /* find previous */
mp->next = e->next; /* remove `e' from its list */
}
else {
if (e->next != NULL) ??
}
lua_assert(ttisnil(gval(node)));
setnilvalue(gkey(e)); /* clear node `e' */
e->next = NULL;
}
#endif
/*
** inserts a new key into a hash table; first, check whether key's main
** position is free. If not, check whether colliding node is in its main
** position or not: if it is not, move colliding node to an empty place and
** put new key in its main position; otherwise (colliding node is in its main
** position), new key goes to an empty position.
*/
static TObject *newkey (lua_State *L, Table *t, const TObject *key) {
TObject *val;
Node *mp = luaH_mainposition(t, key);
if (!ttisnil(gval(mp))) { /* main position is not free? */
Node *othern = luaH_mainposition(t, gkey(mp)); /* `mp' of colliding node */
Node *n = t->firstfree; /* get a free place */
if (othern != mp) { /* is colliding node out of its main position? */
/* yes; move colliding node into free position */
while (othern->next != mp) othern = othern->next; /* find previous */
othern->next = n; /* redo the chain with `n' in place of `mp' */
*n = *mp; /* copy colliding node into free pos. (mp->next also goes) */
mp->next = NULL; /* now `mp' is free */
setnilvalue(gval(mp));
}
else { /* colliding node is in its own main position */
/* new node will go into free position */
n->next = mp->next; /* chain new position */
mp->next = n;
mp = n;
}
}
setobj2t(gkey(mp), key); /* write barrier */
lua_assert(ttisnil(gval(mp)));
for (;;) { /* correct `firstfree' */
if (ttisnil(gkey(t->firstfree)))
return gval(mp); /* OK; table still has a free place */
else if (t->firstfree == t->node) break; /* cannot decrement from here */
else (t->firstfree)--;
}
/* no more free places; must create one */
setbvalue(gval(mp), 0); /* avoid new key being removed */
rehash(L, t); /* grow table */
val = cast(TObject *, luaH_get(t, key)); /* get new position */
lua_assert(ttisboolean(val));
setnilvalue(val);
return val;
}
/*
** generic search function
*/
static const TObject *luaH_getany (Table *t, const TObject *key) {
if (ttisnil(key)) return &luaO_nilobject;
else {
Node *n = luaH_mainposition(t, key);
do { /* check whether `key' is somewhere in the chain */
if (luaO_rawequalObj(gkey(n), key)) return gval(n); /* that's it */
else n = n->next;
} while (n);
return &luaO_nilobject;
}
}
/*
** search function for integers
*/
const TObject *luaH_getnum (Table *t, int key) {
if (1 <= key && key <= t->sizearray)
return &t->array[key-1];
else {
lua_Number nk = cast(lua_Number, key);
Node *n = hashnum(t, nk);
do { /* check whether `key' is somewhere in the chain */
if (ttisnumber(gkey(n)) && nvalue(gkey(n)) == nk)
return gval(n); /* that's it */
else n = n->next;
} while (n);
return &luaO_nilobject;
}
}
/*
** search function for strings
*/
const TObject *luaH_getstr (Table *t, TString *key) {
Node *n = hashstr(t, key);
do { /* check whether `key' is somewhere in the chain */
if (ttisstring(gkey(n)) && tsvalue(gkey(n)) == key)
return gval(n); /* that's it */
else n = n->next;
} while (n);
return &luaO_nilobject;
}
/*
** main search function
*/
const TObject *luaH_get (Table *t, const TObject *key) {
switch (ttype(key)) {
case LUA_TSTRING: return luaH_getstr(t, tsvalue(key));
case LUA_TNUMBER: {
int k;
lua_number2int(k, (nvalue(key)));
if (cast(lua_Number, k) == nvalue(key)) /* is an integer index? */
return luaH_getnum(t, k); /* use specialized version */
/* else go through */
}
default: return luaH_getany(t, key);
}
}
TObject *luaH_set (lua_State *L, Table *t, const TObject *key) {
const TObject *p = luaH_get(t, key);
t->flags = 0;
if (p != &luaO_nilobject)
return cast(TObject *, p);
else {
if (ttisnil(key)) luaG_runerror(L, "table index is nil");
else if (ttisnumber(key) && nvalue(key) != nvalue(key))
luaG_runerror(L, "table index is NaN");
return newkey(L, t, key);
}
}
TObject *luaH_setnum (lua_State *L, Table *t, int key) {
const TObject *p = luaH_getnum(t, key);
if (p != &luaO_nilobject)
return cast(TObject *, p);
else {
TObject k;
setnvalue(&k, cast(lua_Number, key));
return newkey(L, t, &k);
}
}

31
auto3/lua/src/ltable.h Normal file
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/*
** $Id: ltable.h,v 1.44 2003/03/18 12:50:04 roberto Exp $
** Lua tables (hash)
** See Copyright Notice in lua.h
*/
#ifndef ltable_h
#define ltable_h
#include "lobject.h"
#define gnode(t,i) (&(t)->node[i])
#define gkey(n) (&(n)->i_key)
#define gval(n) (&(n)->i_val)
const TObject *luaH_getnum (Table *t, int key);
TObject *luaH_setnum (lua_State *L, Table *t, int key);
const TObject *luaH_getstr (Table *t, TString *key);
const TObject *luaH_get (Table *t, const TObject *key);
TObject *luaH_set (lua_State *L, Table *t, const TObject *key);
Table *luaH_new (lua_State *L, int narray, int lnhash);
void luaH_free (lua_State *L, Table *t);
int luaH_next (lua_State *L, Table *t, StkId key);
/* exported only for debugging */
Node *luaH_mainposition (const Table *t, const TObject *key);
#endif

852
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/*
** $Id: ltests.c,v 1.158 2003/04/07 14:35:00 roberto Exp $
** Internal Module for Debugging of the Lua Implementation
** See Copyright Notice in lua.h
*/
#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define ltests_c
#include "lua.h"
#include "lapi.h"
#include "lauxlib.h"
#include "lcode.h"
#include "ldebug.h"
#include "ldo.h"
#include "lfunc.h"
#include "lmem.h"
#include "lopcodes.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "lualib.h"
/*
** The whole module only makes sense with LUA_DEBUG on
*/
#ifdef LUA_DEBUG
#define lua_pushintegral(L,i) lua_pushnumber(L, cast(lua_Number, (i)))
static lua_State *lua_state = NULL;
int islocked = 0;
#define func_at(L,k) (L->ci->base+(k) - 1)
static void setnameval (lua_State *L, const char *name, int val) {
lua_pushstring(L, name);
lua_pushintegral(L, val);
lua_settable(L, -3);
}
/*
** {======================================================================
** Controlled version for realloc.
** =======================================================================
*/
#define MARK 0x55 /* 01010101 (a nice pattern) */
#ifndef EXTERNMEMCHECK
/* full memory check */
#define HEADER (sizeof(L_Umaxalign)) /* ensures maximum alignment for HEADER */
#define MARKSIZE 16 /* size of marks after each block */
#define blockhead(b) (cast(char *, b) - HEADER)
#define setsize(newblock, size) (*cast(size_t *, newblock) = size)
#define checkblocksize(b, size) (size == (*cast(size_t *, blockhead(b))))
#define fillmem(mem,size) memset(mem, -MARK, size)
#else
/* external memory check: don't do it twice */
#define HEADER 0
#define MARKSIZE 0
#define blockhead(b) (b)
#define setsize(newblock, size) /* empty */
#define checkblocksize(b,size) (1)
#define fillmem(mem,size) /* empty */
#endif
unsigned long memdebug_numblocks = 0;
unsigned long memdebug_total = 0;
unsigned long memdebug_maxmem = 0;
unsigned long memdebug_memlimit = ULONG_MAX;
static void *checkblock (void *block, size_t size) {
void *b = blockhead(block);
int i;
for (i=0;i<MARKSIZE;i++)
lua_assert(*(cast(char *, b)+HEADER+size+i) == MARK+i); /* corrupted block? */
return b;
}
static void freeblock (void *block, size_t size) {
if (block) {
lua_assert(checkblocksize(block, size));
block = checkblock(block, size);
fillmem(block, size+HEADER+MARKSIZE); /* erase block */
free(block); /* free original block */
memdebug_numblocks--;
memdebug_total -= size;
}
}
void *debug_realloc (void *block, size_t oldsize, size_t size) {
lua_assert(oldsize == 0 || checkblocksize(block, oldsize));
/* ISO does not specify what realloc(NULL, 0) does */
lua_assert(block != NULL || size > 0);
if (size == 0) {
freeblock(block, oldsize);
return NULL;
}
else if (size > oldsize && memdebug_total+size-oldsize > memdebug_memlimit)
return NULL; /* to test memory allocation errors */
else {
void *newblock;
int i;
size_t realsize = HEADER+size+MARKSIZE;
size_t commonsize = (oldsize < size) ? oldsize : size;
if (realsize < size) return NULL; /* overflow! */
newblock = malloc(realsize); /* alloc a new block */
if (newblock == NULL) return NULL;
if (block) {
memcpy(cast(char *, newblock)+HEADER, block, commonsize);
freeblock(block, oldsize); /* erase (and check) old copy */
}
/* initialize new part of the block with something `weird' */
fillmem(cast(char *, newblock)+HEADER+commonsize, size-commonsize);
memdebug_total += size;
if (memdebug_total > memdebug_maxmem)
memdebug_maxmem = memdebug_total;
memdebug_numblocks++;
setsize(newblock, size);
for (i=0;i<MARKSIZE;i++)
*(cast(char *, newblock)+HEADER+size+i) = cast(char, MARK+i);
return cast(char *, newblock)+HEADER;
}
}
/* }====================================================================== */
/*
** {======================================================
** Disassembler
** =======================================================
*/
static char *buildop (Proto *p, int pc, char *buff) {
Instruction i = p->code[pc];
OpCode o = GET_OPCODE(i);
const char *name = luaP_opnames[o];
int line = getline(p, pc);
sprintf(buff, "(%4d) %4d - ", line, pc);
switch (getOpMode(o)) {
case iABC:
sprintf(buff+strlen(buff), "%-12s%4d %4d %4d", name,
GETARG_A(i), GETARG_B(i), GETARG_C(i));
break;
case iABx:
sprintf(buff+strlen(buff), "%-12s%4d %4d", name, GETARG_A(i), GETARG_Bx(i));
break;
case iAsBx:
sprintf(buff+strlen(buff), "%-12s%4d %4d", name, GETARG_A(i), GETARG_sBx(i));
break;
}
return buff;
}
#if 0
void luaI_printcode (Proto *pt, int size) {
int pc;
for (pc=0; pc<size; pc++) {
char buff[100];
printf("%s\n", buildop(pt, pc, buff));
}
printf("-------\n");
}
#endif
static int listcode (lua_State *L) {
int pc;
Proto *p;
luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
1, "Lua function expected");
p = clvalue(func_at(L, 1))->l.p;
lua_newtable(L);
setnameval(L, "maxstack", p->maxstacksize);
setnameval(L, "numparams", p->numparams);
for (pc=0; pc<p->sizecode; pc++) {
char buff[100];
lua_pushintegral(L, pc+1);
lua_pushstring(L, buildop(p, pc, buff));
lua_settable(L, -3);
}
return 1;
}
static int listk (lua_State *L) {
Proto *p;
int i;
luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
1, "Lua function expected");
p = clvalue(func_at(L, 1))->l.p;
lua_newtable(L);
for (i=0; i<p->sizek; i++) {
lua_pushintegral(L, i+1);
luaA_pushobject(L, p->k+i);
lua_settable(L, -3);
}
return 1;
}
static int listlocals (lua_State *L) {
Proto *p;
int pc = luaL_checkint(L, 2) - 1;
int i = 0;
const char *name;
luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
1, "Lua function expected");
p = clvalue(func_at(L, 1))->l.p;
while ((name = luaF_getlocalname(p, ++i, pc)) != NULL)
lua_pushstring(L, name);
return i-1;
}
/* }====================================================== */
static int get_limits (lua_State *L) {
lua_newtable(L);
setnameval(L, "BITS_INT", BITS_INT);
setnameval(L, "LFPF", LFIELDS_PER_FLUSH);
setnameval(L, "MAXVARS", MAXVARS);
setnameval(L, "MAXPARAMS", MAXPARAMS);
setnameval(L, "MAXSTACK", MAXSTACK);
setnameval(L, "MAXUPVALUES", MAXUPVALUES);
return 1;
}
static int mem_query (lua_State *L) {
if (lua_isnone(L, 1)) {
lua_pushintegral(L, memdebug_total);
lua_pushintegral(L, memdebug_numblocks);
lua_pushintegral(L, memdebug_maxmem);
return 3;
}
else {
memdebug_memlimit = luaL_checkint(L, 1);
return 0;
}
}
static int hash_query (lua_State *L) {
if (lua_isnone(L, 2)) {
luaL_argcheck(L, lua_type(L, 1) == LUA_TSTRING, 1, "string expected");
lua_pushintegral(L, tsvalue(func_at(L, 1))->tsv.hash);
}
else {
TObject *o = func_at(L, 1);
Table *t;
luaL_checktype(L, 2, LUA_TTABLE);
t = hvalue(func_at(L, 2));
lua_pushintegral(L, luaH_mainposition(t, o) - t->node);
}
return 1;
}
static int stacklevel (lua_State *L) {
unsigned long a = 0;
lua_pushintegral(L, (int)(L->top - L->stack));
lua_pushintegral(L, (int)(L->stack_last - L->stack));
lua_pushintegral(L, (int)(L->ci - L->base_ci));
lua_pushintegral(L, (int)(L->end_ci - L->base_ci));
lua_pushintegral(L, (unsigned long)&a);
return 5;
}
static int table_query (lua_State *L) {
const Table *t;
int i = luaL_optint(L, 2, -1);
luaL_checktype(L, 1, LUA_TTABLE);
t = hvalue(func_at(L, 1));
if (i == -1) {
lua_pushintegral(L, t->sizearray);
lua_pushintegral(L, sizenode(t));
lua_pushintegral(L, t->firstfree - t->node);
}
else if (i < t->sizearray) {
lua_pushintegral(L, i);
luaA_pushobject(L, &t->array[i]);
lua_pushnil(L);
}
else if ((i -= t->sizearray) < sizenode(t)) {
if (!ttisnil(gval(gnode(t, i))) ||
ttisnil(gkey(gnode(t, i))) ||
ttisnumber(gkey(gnode(t, i)))) {
luaA_pushobject(L, gkey(gnode(t, i)));
}
else
lua_pushstring(L, "<undef>");
luaA_pushobject(L, gval(gnode(t, i)));
if (t->node[i].next)
lua_pushintegral(L, t->node[i].next - t->node);
else
lua_pushnil(L);
}
return 3;
}
static int string_query (lua_State *L) {
stringtable *tb = &G(L)->strt;
int s = luaL_optint(L, 2, 0) - 1;
if (s==-1) {
lua_pushintegral(L ,tb->nuse);
lua_pushintegral(L ,tb->size);
return 2;
}
else if (s < tb->size) {
GCObject *ts;
int n = 0;
for (ts = tb->hash[s]; ts; ts = ts->gch.next) {
setsvalue2s(L->top, gcotots(ts));
incr_top(L);
n++;
}
return n;
}
return 0;
}
static int tref (lua_State *L) {
int level = lua_gettop(L);
int lock = luaL_optint(L, 2, 1);
luaL_checkany(L, 1);
lua_pushvalue(L, 1);
lua_pushintegral(L, lua_ref(L, lock));
assert(lua_gettop(L) == level+1); /* +1 for result */
return 1;
}
static int getref (lua_State *L) {
int level = lua_gettop(L);
lua_getref(L, luaL_checkint(L, 1));
assert(lua_gettop(L) == level+1);
return 1;
}
static int unref (lua_State *L) {
int level = lua_gettop(L);
lua_unref(L, luaL_checkint(L, 1));
assert(lua_gettop(L) == level);
return 0;
}
static int metatable (lua_State *L) {
luaL_checkany(L, 1);
if (lua_isnone(L, 2)) {
if (lua_getmetatable(L, 1) == 0)
lua_pushnil(L);
}
else {
lua_settop(L, 2);
luaL_checktype(L, 2, LUA_TTABLE);
lua_setmetatable(L, 1);
}
return 1;
}
static int upvalue (lua_State *L) {
int n = luaL_checkint(L, 2);
luaL_checktype(L, 1, LUA_TFUNCTION);
if (lua_isnone(L, 3)) {
const char *name = lua_getupvalue(L, 1, n);
if (name == NULL) return 0;
lua_pushstring(L, name);
return 2;
}
else {
const char *name = lua_setupvalue(L, 1, n);
lua_pushstring(L, name);
return 1;
}
}
static int newuserdata (lua_State *L) {
size_t size = luaL_checkint(L, 1);
char *p = cast(char *, lua_newuserdata(L, size));
while (size--) *p++ = '\0';
return 1;
}
static int pushuserdata (lua_State *L) {
lua_pushlightuserdata(L, cast(void *, luaL_checkint(L, 1)));
return 1;
}
static int udataval (lua_State *L) {
lua_pushintegral(L, cast(int, lua_touserdata(L, 1)));
return 1;
}
static int doonnewstack (lua_State *L) {
lua_State *L1 = lua_newthread(L);
size_t l;
const char *s = luaL_checklstring(L, 1, &l);
int status = luaL_loadbuffer(L1, s, l, s);
if (status == 0)
status = lua_pcall(L1, 0, 0, 0);
lua_pushintegral(L, status);
return 1;
}
static int s2d (lua_State *L) {
lua_pushnumber(L, *cast(const double *, luaL_checkstring(L, 1)));
return 1;
}
static int d2s (lua_State *L) {
double d = luaL_checknumber(L, 1);
lua_pushlstring(L, cast(char *, &d), sizeof(d));
return 1;
}
static int newstate (lua_State *L) {
lua_State *L1 = lua_open();
if (L1) {
lua_userstateopen(L1); /* init lock */
lua_pushintegral(L, (unsigned long)L1);
}
else
lua_pushnil(L);
return 1;
}
static int loadlib (lua_State *L) {
static const luaL_reg libs[] = {
{"mathlibopen", luaopen_math},
{"strlibopen", luaopen_string},
{"iolibopen", luaopen_io},
{"tablibopen", luaopen_table},
{"dblibopen", luaopen_debug},
{"baselibopen", luaopen_base},
{NULL, NULL}
};
lua_State *L1 = cast(lua_State *,
cast(unsigned long, luaL_checknumber(L, 1)));
lua_pushvalue(L1, LUA_GLOBALSINDEX);
luaL_openlib(L1, NULL, libs, 0);
return 0;
}
static int closestate (lua_State *L) {
lua_State *L1 = cast(lua_State *, cast(unsigned long, luaL_checknumber(L, 1)));
lua_close(L1);
lua_unlock(L); /* close cannot unlock that */
return 0;
}
static int doremote (lua_State *L) {
lua_State *L1 = cast(lua_State *,cast(unsigned long,luaL_checknumber(L, 1)));
size_t lcode;
const char *code = luaL_checklstring(L, 2, &lcode);
int status;
lua_settop(L1, 0);
status = luaL_loadbuffer(L1, code, lcode, code);
if (status == 0)
status = lua_pcall(L1, 0, LUA_MULTRET, 0);
if (status != 0) {
lua_pushnil(L);
lua_pushintegral(L, status);
lua_pushstring(L, lua_tostring(L1, -1));
return 3;
}
else {
int i = 0;
while (!lua_isnone(L1, ++i))
lua_pushstring(L, lua_tostring(L1, i));
lua_pop(L1, i-1);
return i-1;
}
}
static int log2_aux (lua_State *L) {
lua_pushintegral(L, luaO_log2(luaL_checkint(L, 1)));
return 1;
}
static int int2fb_aux (lua_State *L) {
int b = luaO_int2fb(luaL_checkint(L, 1));
lua_pushintegral(L, b);
lua_pushintegral(L, fb2int(b));
return 2;
}
static int test_do (lua_State *L) {
const char *p = luaL_checkstring(L, 1);
if (*p == '@')
lua_dofile(L, p+1);
else
lua_dostring(L, p);
return lua_gettop(L);
}
/*
** {======================================================
** function to test the API with C. It interprets a kind of assembler
** language with calls to the API, so the test can be driven by Lua code
** =======================================================
*/
static const char *const delimits = " \t\n,;";
static void skip (const char **pc) {
while (**pc != '\0' && strchr(delimits, **pc)) (*pc)++;
}
static int getnum_aux (lua_State *L, const char **pc) {
int res = 0;
int sig = 1;
skip(pc);
if (**pc == '.') {
res = cast(int, lua_tonumber(L, -1));
lua_pop(L, 1);
(*pc)++;
return res;
}
else if (**pc == '-') {
sig = -1;
(*pc)++;
}
while (isdigit(cast(int, **pc))) res = res*10 + (*(*pc)++) - '0';
return sig*res;
}
static const char *getname_aux (char *buff, const char **pc) {
int i = 0;
skip(pc);
while (**pc != '\0' && !strchr(delimits, **pc))
buff[i++] = *(*pc)++;
buff[i] = '\0';
return buff;
}
#define EQ(s1) (strcmp(s1, inst) == 0)
#define getnum (getnum_aux(L, &pc))
#define getname (getname_aux(buff, &pc))
static int testC (lua_State *L) {
char buff[30];
const char *pc = luaL_checkstring(L, 1);
for (;;) {
const char *inst = getname;
if EQ("") return 0;
else if EQ("isnumber") {
lua_pushintegral(L, lua_isnumber(L, getnum));
}
else if EQ("isstring") {
lua_pushintegral(L, lua_isstring(L, getnum));
}
else if EQ("istable") {
lua_pushintegral(L, lua_istable(L, getnum));
}
else if EQ("iscfunction") {
lua_pushintegral(L, lua_iscfunction(L, getnum));
}
else if EQ("isfunction") {
lua_pushintegral(L, lua_isfunction(L, getnum));
}
else if EQ("isuserdata") {
lua_pushintegral(L, lua_isuserdata(L, getnum));
}
else if EQ("isudataval") {
lua_pushintegral(L, lua_islightuserdata(L, getnum));
}
else if EQ("isnil") {
lua_pushintegral(L, lua_isnil(L, getnum));
}
else if EQ("isnull") {
lua_pushintegral(L, lua_isnone(L, getnum));
}
else if EQ("tonumber") {
lua_pushnumber(L, lua_tonumber(L, getnum));
}
else if EQ("tostring") {
const char *s = lua_tostring(L, getnum);
lua_pushstring(L, s);
}
else if EQ("strlen") {
lua_pushintegral(L, lua_strlen(L, getnum));
}
else if EQ("tocfunction") {
lua_pushcfunction(L, lua_tocfunction(L, getnum));
}
else if EQ("return") {
return getnum;
}
else if EQ("gettop") {
lua_pushintegral(L, lua_gettop(L));
}
else if EQ("settop") {
lua_settop(L, getnum);
}
else if EQ("pop") {
lua_pop(L, getnum);
}
else if EQ("pushnum") {
lua_pushintegral(L, getnum);
}
else if EQ("pushnil") {
lua_pushnil(L);
}
else if EQ("pushbool") {
lua_pushboolean(L, getnum);
}
else if EQ("tobool") {
lua_pushintegral(L, lua_toboolean(L, getnum));
}
else if EQ("pushvalue") {
lua_pushvalue(L, getnum);
}
else if EQ("pushcclosure") {
lua_pushcclosure(L, testC, getnum);
}
else if EQ("pushupvalues") {
lua_pushupvalues(L);
}
else if EQ("remove") {
lua_remove(L, getnum);
}
else if EQ("insert") {
lua_insert(L, getnum);
}
else if EQ("replace") {
lua_replace(L, getnum);
}
else if EQ("gettable") {
lua_gettable(L, getnum);
}
else if EQ("settable") {
lua_settable(L, getnum);
}
else if EQ("next") {
lua_next(L, -2);
}
else if EQ("concat") {
lua_concat(L, getnum);
}
else if EQ("lessthan") {
int a = getnum;
lua_pushboolean(L, lua_lessthan(L, a, getnum));
}
else if EQ("equal") {
int a = getnum;
lua_pushboolean(L, lua_equal(L, a, getnum));
}
else if EQ("rawcall") {
int narg = getnum;
int nres = getnum;
lua_call(L, narg, nres);
}
else if EQ("call") {
int narg = getnum;
int nres = getnum;
lua_pcall(L, narg, nres, 0);
}
else if EQ("loadstring") {
size_t sl;
const char *s = luaL_checklstring(L, getnum, &sl);
luaL_loadbuffer(L, s, sl, s);
}
else if EQ("loadfile") {
luaL_loadfile(L, luaL_checkstring(L, getnum));
}
else if EQ("setmetatable") {
lua_setmetatable(L, getnum);
}
else if EQ("getmetatable") {
if (lua_getmetatable(L, getnum) == 0)
lua_pushnil(L);
}
else if EQ("type") {
lua_pushstring(L, lua_typename(L, lua_type(L, getnum)));
}
else if EQ("getn") {
int i = getnum;
lua_pushintegral(L, luaL_getn(L, i));
}
else if EQ("setn") {
int i = getnum;
int n = cast(int, lua_tonumber(L, -1));
luaL_setn(L, i, n);
lua_pop(L, 1);
}
else luaL_error(L, "unknown instruction %s", buff);
}
return 0;
}
/* }====================================================== */
/*
** {======================================================
** tests for yield inside hooks
** =======================================================
*/
static void yieldf (lua_State *L, lua_Debug *ar) {
lua_yield(L, 0);
}
static int setyhook (lua_State *L) {
if (lua_isnoneornil(L, 1))
lua_sethook(L, NULL, 0, 0); /* turn off hooks */
else {
const char *smask = luaL_checkstring(L, 1);
int count = luaL_optint(L, 2, 0);
int mask = 0;
if (strchr(smask, 'l')) mask |= LUA_MASKLINE;
if (count > 0) mask |= LUA_MASKCOUNT;
lua_sethook(L, yieldf, mask, count);
}
return 0;
}
static int coresume (lua_State *L) {
int status;
lua_State *co = lua_tothread(L, 1);
luaL_argcheck(L, co, 1, "coroutine expected");
status = lua_resume(co, 0);
if (status != 0) {
lua_pushboolean(L, 0);
lua_insert(L, -2);
return 2; /* return false + error message */
}
else {
lua_pushboolean(L, 1);
return 1;
}
}
/* }====================================================== */
static const struct luaL_reg tests_funcs[] = {
{"hash", hash_query},
{"limits", get_limits},
{"listcode", listcode},
{"listk", listk},
{"listlocals", listlocals},
{"loadlib", loadlib},
{"stacklevel", stacklevel},
{"querystr", string_query},
{"querytab", table_query},
{"doit", test_do},
{"testC", testC},
{"ref", tref},
{"getref", getref},
{"unref", unref},
{"d2s", d2s},
{"s2d", s2d},
{"metatable", metatable},
{"upvalue", upvalue},
{"newuserdata", newuserdata},
{"pushuserdata", pushuserdata},
{"udataval", udataval},
{"doonnewstack", doonnewstack},
{"newstate", newstate},
{"closestate", closestate},
{"doremote", doremote},
{"log2", log2_aux},
{"int2fb", int2fb_aux},
{"totalmem", mem_query},
{"resume", coresume},
{"setyhook", setyhook},
{NULL, NULL}
};
static void fim (void) {
if (!islocked)
lua_close(lua_state);
lua_assert(memdebug_numblocks == 0);
lua_assert(memdebug_total == 0);
}
static int l_panic (lua_State *L) {
UNUSED(L);
fprintf(stderr, "unable to recover; exiting\n");
return 0;
}
int luaB_opentests (lua_State *L) {
lua_atpanic(L, l_panic);
lua_userstateopen(L); /* init lock */
lua_state = L; /* keep first state to be opened */
luaL_openlib(L, "T", tests_funcs, 0);
atexit(fim);
return 0;
}
#undef main
int main (int argc, char *argv[]) {
char *limit = getenv("MEMLIMIT");
if (limit)
memdebug_memlimit = strtoul(limit, NULL, 10);
l_main(argc, argv);
return 0;
}
#endif

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/*
** $Id: ltm.c,v 1.106 2003/04/03 13:35:34 roberto Exp $
** Tag methods
** See Copyright Notice in lua.h
*/
#include <string.h>
#define ltm_c
#include "lua.h"
#include "lobject.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "ltm.h"
const char *const luaT_typenames[] = {
"nil", "boolean", "userdata", "number",
"string", "table", "function", "userdata", "thread"
};
void luaT_init (lua_State *L) {
static const char *const luaT_eventname[] = { /* ORDER TM */
"__index", "__newindex",
"__gc", "__mode", "__eq",
"__add", "__sub", "__mul", "__div",
"__pow", "__unm", "__lt", "__le",
"__concat", "__call"
};
int i;
for (i=0; i<TM_N; i++) {
G(L)->tmname[i] = luaS_new(L, luaT_eventname[i]);
luaS_fix(G(L)->tmname[i]); /* never collect these names */
}
}
/*
** function to be used with macro "fasttm": optimized for absence of
** tag methods
*/
const TObject *luaT_gettm (Table *events, TMS event, TString *ename) {
const TObject *tm = luaH_getstr(events, ename);
lua_assert(event <= TM_EQ);
if (ttisnil(tm)) { /* no tag method? */
events->flags |= cast(lu_byte, 1u<<event); /* cache this fact */
return NULL;
}
else return tm;
}
const TObject *luaT_gettmbyobj (lua_State *L, const TObject *o, TMS event) {
TString *ename = G(L)->tmname[event];
switch (ttype(o)) {
case LUA_TTABLE:
return luaH_getstr(hvalue(o)->metatable, ename);
case LUA_TUSERDATA:
return luaH_getstr(uvalue(o)->uv.metatable, ename);
default:
return &luaO_nilobject;
}
}

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/*
** $Id: ltm.h,v 1.41 2002/11/14 11:51:50 roberto Exp $
** Tag methods
** See Copyright Notice in lua.h
*/
#ifndef ltm_h
#define ltm_h
#include "lobject.h"
/*
* WARNING: if you change the order of this enumeration,
* grep "ORDER TM"
*/
typedef enum {
TM_INDEX,
TM_NEWINDEX,
TM_GC,
TM_MODE,
TM_EQ, /* last tag method with `fast' access */
TM_ADD,
TM_SUB,
TM_MUL,
TM_DIV,
TM_POW,
TM_UNM,
TM_LT,
TM_LE,
TM_CONCAT,
TM_CALL,
TM_N /* number of elements in the enum */
} TMS;
#define gfasttm(g,et,e) \
(((et)->flags & (1u<<(e))) ? NULL : luaT_gettm(et, e, (g)->tmname[e]))
#define fasttm(l,et,e) gfasttm(G(l), et, e)
const TObject *luaT_gettm (Table *events, TMS event, TString *ename);
const TObject *luaT_gettmbyobj (lua_State *L, const TObject *o, TMS event);
void luaT_init (lua_State *L);
extern const char *const luaT_typenames[];
#endif

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/*
** $Id: lundump.c,v 1.49 2003/04/07 20:34:20 lhf Exp $
** load pre-compiled Lua chunks
** See Copyright Notice in lua.h
*/
#define lundump_c
#include "lua.h"
#include "ldebug.h"
#include "lfunc.h"
#include "lmem.h"
#include "lopcodes.h"
#include "lstring.h"
#include "lundump.h"
#include "lzio.h"
#define LoadByte (lu_byte) ezgetc
typedef struct {
lua_State* L;
ZIO* Z;
Mbuffer* b;
int swap;
const char* name;
} LoadState;
static void unexpectedEOZ (LoadState* S)
{
luaG_runerror(S->L,"unexpected end of file in %s",S->name);
}
static int ezgetc (LoadState* S)
{
int c=zgetc(S->Z);
if (c==EOZ) unexpectedEOZ(S);
return c;
}
static void ezread (LoadState* S, void* b, int n)
{
int r=luaZ_read(S->Z,b,n);
if (r!=0) unexpectedEOZ(S);
}
static void LoadBlock (LoadState* S, void* b, size_t size)
{
if (S->swap)
{
char* p=(char*) b+size-1;
int n=size;
while (n--) *p--=(char)ezgetc(S);
}
else
ezread(S,b,size);
}
static void LoadVector (LoadState* S, void* b, int m, size_t size)
{
if (S->swap)
{
char* q=(char*) b;
while (m--)
{
char* p=q+size-1;
int n=size;
while (n--) *p--=(char)ezgetc(S);
q+=size;
}
}
else
ezread(S,b,m*size);
}
static int LoadInt (LoadState* S)
{
int x;
LoadBlock(S,&x,sizeof(x));
if (x<0) luaG_runerror(S->L,"bad integer in %s",S->name);
return x;
}
static size_t LoadSize (LoadState* S)
{
size_t x;
LoadBlock(S,&x,sizeof(x));
return x;
}
static lua_Number LoadNumber (LoadState* S)
{
lua_Number x;
LoadBlock(S,&x,sizeof(x));
return x;
}
static TString* LoadString (LoadState* S)
{
size_t size=LoadSize(S);
if (size==0)
return NULL;
else
{
char* s=luaZ_openspace(S->L,S->b,size);
ezread(S,s,size);
return luaS_newlstr(S->L,s,size-1); /* remove trailing '\0' */
}
}
static void LoadCode (LoadState* S, Proto* f)
{
int size=LoadInt(S);
f->code=luaM_newvector(S->L,size,Instruction);
f->sizecode=size;
LoadVector(S,f->code,size,sizeof(*f->code));
}
static void LoadLocals (LoadState* S, Proto* f)
{
int i,n;
n=LoadInt(S);
f->locvars=luaM_newvector(S->L,n,LocVar);
f->sizelocvars=n;
for (i=0; i<n; i++)
{
f->locvars[i].varname=LoadString(S);
f->locvars[i].startpc=LoadInt(S);
f->locvars[i].endpc=LoadInt(S);
}
}
static void LoadLines (LoadState* S, Proto* f)
{
int size=LoadInt(S);
f->lineinfo=luaM_newvector(S->L,size,int);
f->sizelineinfo=size;
LoadVector(S,f->lineinfo,size,sizeof(*f->lineinfo));
}
static void LoadUpvalues (LoadState* S, Proto* f)
{
int i,n;
n=LoadInt(S);
if (n!=0 && n!=f->nups)
luaG_runerror(S->L,"bad nupvalues in %s: read %d; expected %d",
S->name,n,f->nups);
f->upvalues=luaM_newvector(S->L,n,TString*);
f->sizeupvalues=n;
for (i=0; i<n; i++) f->upvalues[i]=LoadString(S);
}
static Proto* LoadFunction (LoadState* S, TString* p);
static void LoadConstants (LoadState* S, Proto* f)
{
int i,n;
n=LoadInt(S);
f->k=luaM_newvector(S->L,n,TObject);
f->sizek=n;
for (i=0; i<n; i++)
{
TObject* o=&f->k[i];
int t=LoadByte(S);
switch (t)
{
case LUA_TNUMBER:
setnvalue(o,LoadNumber(S));
break;
case LUA_TSTRING:
setsvalue2n(o,LoadString(S));
break;
case LUA_TNIL:
setnilvalue(o);
break;
default:
luaG_runerror(S->L,"bad constant type (%d) in %s",t,S->name);
break;
}
}
n=LoadInt(S);
f->p=luaM_newvector(S->L,n,Proto*);
f->sizep=n;
for (i=0; i<n; i++) f->p[i]=LoadFunction(S,f->source);
}
static Proto* LoadFunction (LoadState* S, TString* p)
{
Proto* f=luaF_newproto(S->L);
f->source=LoadString(S); if (f->source==NULL) f->source=p;
f->lineDefined=LoadInt(S);
f->nups=LoadByte(S);
f->numparams=LoadByte(S);
f->is_vararg=LoadByte(S);
f->maxstacksize=LoadByte(S);
LoadLines(S,f);
LoadLocals(S,f);
LoadUpvalues(S,f);
LoadConstants(S,f);
LoadCode(S,f);
#ifndef TRUST_BINARIES
if (!luaG_checkcode(f)) luaG_runerror(S->L,"bad code in %s",S->name);
#endif
return f;
}
static void LoadSignature (LoadState* S)
{
const char* s=LUA_SIGNATURE;
while (*s!=0 && ezgetc(S)==*s)
++s;
if (*s!=0) luaG_runerror(S->L,"bad signature in %s",S->name);
}
static void TestSize (LoadState* S, int s, const char* what)
{
int r=LoadByte(S);
if (r!=s)
luaG_runerror(S->L,"virtual machine mismatch in %s: "
"size of %s is %d but read %d",S->name,what,s,r);
}
#define TESTSIZE(s,w) TestSize(S,s,w)
#define V(v) v/16,v%16
static void LoadHeader (LoadState* S)
{
int version;
lua_Number x,tx=TEST_NUMBER;
LoadSignature(S);
version=LoadByte(S);
if (version>VERSION)
luaG_runerror(S->L,"%s too new: "
"read version %d.%d; expected at most %d.%d",
S->name,V(version),V(VERSION));
if (version<VERSION0) /* check last major change */
luaG_runerror(S->L,"%s too old: "
"read version %d.%d; expected at least %d.%d",
S->name,V(version),V(VERSION0));
S->swap=(luaU_endianness()!=LoadByte(S)); /* need to swap bytes? */
TESTSIZE(sizeof(int),"int");
TESTSIZE(sizeof(size_t), "size_t");
TESTSIZE(sizeof(Instruction), "Instruction");
TESTSIZE(SIZE_OP, "OP");
TESTSIZE(SIZE_A, "A");
TESTSIZE(SIZE_B, "B");
TESTSIZE(SIZE_C, "C");
TESTSIZE(sizeof(lua_Number), "number");
x=LoadNumber(S);
if ((long)x!=(long)tx) /* disregard errors in last bits of fraction */
luaG_runerror(S->L,"unknown number format in %s",S->name);
}
static Proto* LoadChunk (LoadState* S)
{
LoadHeader(S);
return LoadFunction(S,NULL);
}
/*
** load precompiled chunk
*/
Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff)
{
LoadState S;
const char* s=zname(Z);
if (*s=='@' || *s=='=')
S.name=s+1;
else if (*s==LUA_SIGNATURE[0])
S.name="binary string";
else
S.name=s;
S.L=L;
S.Z=Z;
S.b=buff;
return LoadChunk(&S);
}
/*
** find byte order
*/
int luaU_endianness (void)
{
int x=1;
return *(char*)&x;
}

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/*
** $Id: lundump.h,v 1.30 2003/04/07 20:34:20 lhf Exp $
** load pre-compiled Lua chunks
** See Copyright Notice in lua.h
*/
#ifndef lundump_h
#define lundump_h
#include "lobject.h"
#include "lzio.h"
/* load one chunk; from lundump.c */
Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff);
/* find byte order; from lundump.c */
int luaU_endianness (void);
/* dump one chunk; from ldump.c */
void luaU_dump (lua_State* L, const Proto* Main, lua_Chunkwriter w, void* data);
/* print one chunk; from print.c */
void luaU_print (const Proto* Main);
/* definitions for headers of binary files */
#define LUA_SIGNATURE "\033Lua" /* binary files start with "<esc>Lua" */
#define VERSION 0x50 /* last format change was in 5.0 */
#define VERSION0 0x50 /* last major change was in 5.0 */
/* a multiple of PI for testing native format */
/* multiplying by 1E7 gives non-trivial integer values */
#define TEST_NUMBER ((lua_Number)3.14159265358979323846E7)
#endif

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/*
** $Id: lvm.c,v 1.284c 2003/04/03 13:35:34 roberto Exp $
** Lua virtual machine
** See Copyright Notice in lua.h
*/
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
/* needed only when `lua_number2str' uses `sprintf' */
#include <stdio.h>
#define lvm_c
#include "lua.h"
#include "ldebug.h"
#include "ldo.h"
#include "lfunc.h"
#include "lgc.h"
#include "lobject.h"
#include "lopcodes.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "ltm.h"
#include "lvm.h"
/* function to convert a lua_Number to a string */
#ifndef lua_number2str
#define lua_number2str(s,n) sprintf((s), LUA_NUMBER_FMT, (n))
#endif
/* limit for table tag-method chains (to avoid loops) */
#define MAXTAGLOOP 100
const TObject *luaV_tonumber (const TObject *obj, TObject *n) {
lua_Number num;
if (ttisnumber(obj)) return obj;
if (ttisstring(obj) && luaO_str2d(svalue(obj), &num)) {
setnvalue(n, num);
return n;
}
else
return NULL;
}
int luaV_tostring (lua_State *L, StkId obj) {
if (!ttisnumber(obj))
return 0;
else {
char s[32]; /* 16 digits, sign, point and \0 (+ some extra...) */
lua_number2str(s, nvalue(obj));
setsvalue2s(obj, luaS_new(L, s));
return 1;
}
}
static void traceexec (lua_State *L) {
lu_byte mask = L->hookmask;
if (mask & LUA_MASKCOUNT) { /* instruction-hook set? */
if (L->hookcount == 0) {
resethookcount(L);
luaD_callhook(L, LUA_HOOKCOUNT, -1);
return;
}
}
if (mask & LUA_MASKLINE) {
CallInfo *ci = L->ci;
Proto *p = ci_func(ci)->l.p;
int newline = getline(p, pcRel(*ci->u.l.pc, p));
if (!L->hookinit) {
luaG_inithooks(L);
return;
}
lua_assert(ci->state & CI_HASFRAME);
if (pcRel(*ci->u.l.pc, p) == 0) /* tracing may be starting now? */
ci->u.l.savedpc = *ci->u.l.pc; /* initialize `savedpc' */
/* calls linehook when enters a new line or jumps back (loop) */
if (*ci->u.l.pc <= ci->u.l.savedpc ||
newline != getline(p, pcRel(ci->u.l.savedpc, p))) {
luaD_callhook(L, LUA_HOOKLINE, newline);
ci = L->ci; /* previous call may reallocate `ci' */
}
ci->u.l.savedpc = *ci->u.l.pc;
}
}
static void callTMres (lua_State *L, const TObject *f,
const TObject *p1, const TObject *p2) {
setobj2s(L->top, f); /* push function */
setobj2s(L->top+1, p1); /* 1st argument */
setobj2s(L->top+2, p2); /* 2nd argument */
luaD_checkstack(L, 3); /* cannot check before (could invalidate p1, p2) */
L->top += 3;
luaD_call(L, L->top - 3, 1);
L->top--; /* result will be in L->top */
}
static void callTM (lua_State *L, const TObject *f,
const TObject *p1, const TObject *p2, const TObject *p3) {
setobj2s(L->top, f); /* push function */
setobj2s(L->top+1, p1); /* 1st argument */
setobj2s(L->top+2, p2); /* 2nd argument */
setobj2s(L->top+3, p3); /* 3th argument */
luaD_checkstack(L, 4); /* cannot check before (could invalidate p1...p3) */
L->top += 4;
luaD_call(L, L->top - 4, 0);
}
static const TObject *luaV_index (lua_State *L, const TObject *t,
TObject *key, int loop) {
const TObject *tm = fasttm(L, hvalue(t)->metatable, TM_INDEX);
if (tm == NULL) return &luaO_nilobject; /* no TM */
if (ttisfunction(tm)) {
callTMres(L, tm, t, key);
return L->top;
}
else return luaV_gettable(L, tm, key, loop);
}
static const TObject *luaV_getnotable (lua_State *L, const TObject *t,
TObject *key, int loop) {
const TObject *tm = luaT_gettmbyobj(L, t, TM_INDEX);
if (ttisnil(tm))
luaG_typeerror(L, t, "index");
if (ttisfunction(tm)) {
callTMres(L, tm, t, key);
return L->top;
}
else return luaV_gettable(L, tm, key, loop);
}
/*
** Function to index a table.
** Receives the table at `t' and the key at `key'.
** leaves the result at `res'.
*/
const TObject *luaV_gettable (lua_State *L, const TObject *t, TObject *key,
int loop) {
if (loop > MAXTAGLOOP)
luaG_runerror(L, "loop in gettable");
if (ttistable(t)) { /* `t' is a table? */
Table *h = hvalue(t);
const TObject *v = luaH_get(h, key); /* do a primitive get */
if (!ttisnil(v)) return v;
else return luaV_index(L, t, key, loop+1);
}
else return luaV_getnotable(L, t, key, loop+1);
}
/*
** Receives table at `t', key at `key' and value at `val'.
*/
void luaV_settable (lua_State *L, const TObject *t, TObject *key, StkId val) {
const TObject *tm;
int loop = 0;
do {
if (ttistable(t)) { /* `t' is a table? */
Table *h = hvalue(t);
TObject *oldval = luaH_set(L, h, key); /* do a primitive set */
if (!ttisnil(oldval) || /* result is no nil? */
(tm = fasttm(L, h->metatable, TM_NEWINDEX)) == NULL) { /* or no TM? */
setobj2t(oldval, val); /* write barrier */
return;
}
/* else will try the tag method */
}
else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_NEWINDEX)))
luaG_typeerror(L, t, "index");
if (ttisfunction(tm)) {
callTM(L, tm, t, key, val);
return;
}
t = tm; /* else repeat with `tm' */
} while (++loop <= MAXTAGLOOP);
luaG_runerror(L, "loop in settable");
}
static int call_binTM (lua_State *L, const TObject *p1, const TObject *p2,
StkId res, TMS event) {
ptrdiff_t result = savestack(L, res);
const TObject *tm = luaT_gettmbyobj(L, p1, event); /* try first operand */
if (ttisnil(tm))
tm = luaT_gettmbyobj(L, p2, event); /* try second operand */
if (!ttisfunction(tm)) return 0;
callTMres(L, tm, p1, p2);
res = restorestack(L, result); /* previous call may change stack */
setobjs2s(res, L->top);
return 1;
}
static const TObject *get_compTM (lua_State *L, Table *mt1, Table *mt2,
TMS event) {
const TObject *tm1 = fasttm(L, mt1, event);
const TObject *tm2;
if (tm1 == NULL) return NULL; /* no metamethod */
if (mt1 == mt2) return tm1; /* same metatables => same metamethods */
tm2 = fasttm(L, mt2, event);
if (tm2 == NULL) return NULL; /* no metamethod */
if (luaO_rawequalObj(tm1, tm2)) /* same metamethods? */
return tm1;
return NULL;
}
static int call_orderTM (lua_State *L, const TObject *p1, const TObject *p2,
TMS event) {
const TObject *tm1 = luaT_gettmbyobj(L, p1, event);
const TObject *tm2;
if (ttisnil(tm1)) return -1; /* no metamethod? */
tm2 = luaT_gettmbyobj(L, p2, event);
if (!luaO_rawequalObj(tm1, tm2)) /* different metamethods? */
return -1;
callTMres(L, tm1, p1, p2);
return !l_isfalse(L->top);
}
static int luaV_strcmp (const TString *ls, const TString *rs) {
const char *l = getstr(ls);
size_t ll = ls->tsv.len;
const char *r = getstr(rs);
size_t lr = rs->tsv.len;
for (;;) {
int temp = strcoll(l, r);
if (temp != 0) return temp;
else { /* strings are equal up to a `\0' */
size_t len = strlen(l); /* index of first `\0' in both strings */
if (len == lr) /* r is finished? */
return (len == ll) ? 0 : 1;
else if (len == ll) /* l is finished? */
return -1; /* l is smaller than r (because r is not finished) */
/* both strings longer than `len'; go on comparing (after the `\0') */
len++;
l += len; ll -= len; r += len; lr -= len;
}
}
}
int luaV_lessthan (lua_State *L, const TObject *l, const TObject *r) {
int res;
if (ttype(l) != ttype(r))
return luaG_ordererror(L, l, r);
else if (ttisnumber(l))
return nvalue(l) < nvalue(r);
else if (ttisstring(l))
return luaV_strcmp(tsvalue(l), tsvalue(r)) < 0;
else if ((res = call_orderTM(L, l, r, TM_LT)) != -1)
return res;
return luaG_ordererror(L, l, r);
}
static int luaV_lessequal (lua_State *L, const TObject *l, const TObject *r) {
int res;
if (ttype(l) != ttype(r))
return luaG_ordererror(L, l, r);
else if (ttisnumber(l))
return nvalue(l) <= nvalue(r);
else if (ttisstring(l))
return luaV_strcmp(tsvalue(l), tsvalue(r)) <= 0;
else if ((res = call_orderTM(L, l, r, TM_LE)) != -1) /* first try `le' */
return res;
else if ((res = call_orderTM(L, r, l, TM_LT)) != -1) /* else try `lt' */
return !res;
return luaG_ordererror(L, l, r);
}
int luaV_equalval (lua_State *L, const TObject *t1, const TObject *t2) {
const TObject *tm;
lua_assert(ttype(t1) == ttype(t2));
switch (ttype(t1)) {
case LUA_TNIL: return 1;
case LUA_TNUMBER: return nvalue(t1) == nvalue(t2);
case LUA_TBOOLEAN: return bvalue(t1) == bvalue(t2); /* true must be 1 !! */
case LUA_TLIGHTUSERDATA: return pvalue(t1) == pvalue(t2);
case LUA_TUSERDATA: {
if (uvalue(t1) == uvalue(t2)) return 1;
tm = get_compTM(L, uvalue(t1)->uv.metatable, uvalue(t2)->uv.metatable,
TM_EQ);
break; /* will try TM */
}
case LUA_TTABLE: {
if (hvalue(t1) == hvalue(t2)) return 1;
tm = get_compTM(L, hvalue(t1)->metatable, hvalue(t2)->metatable, TM_EQ);
break; /* will try TM */
}
default: return gcvalue(t1) == gcvalue(t2);
}
if (tm == NULL) return 0; /* no TM? */
callTMres(L, tm, t1, t2); /* call TM */
return !l_isfalse(L->top);
}
void luaV_concat (lua_State *L, int total, int last) {
do {
StkId top = L->base + last + 1;
int n = 2; /* number of elements handled in this pass (at least 2) */
if (!tostring(L, top-2) || !tostring(L, top-1)) {
if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT))
luaG_concaterror(L, top-2, top-1);
} else if (tsvalue(top-1)->tsv.len > 0) { /* if len=0, do nothing */
/* at least two string values; get as many as possible */
size_t tl = tsvalue(top-1)->tsv.len;
char *buffer;
int i;
/* collect total length */
for (n = 1; n < total && tostring(L, top-n-1); n++) {
size_t l = tsvalue(top-n-1)->tsv.len;
if (l >= MAX_SIZET - tl) luaG_runerror(L, "string length overflow");
tl += l;
}
buffer = luaZ_openspace(L, &G(L)->buff, tl);
tl = 0;
for (i=n; i>0; i--) { /* concat all strings */
size_t l = tsvalue(top-i)->tsv.len;
memcpy(buffer+tl, svalue(top-i), l);
tl += l;
}
setsvalue2s(top-n, luaS_newlstr(L, buffer, tl));
}
total -= n-1; /* got `n' strings to create 1 new */
last -= n-1;
} while (total > 1); /* repeat until only 1 result left */
}
static void Arith (lua_State *L, StkId ra,
const TObject *rb, const TObject *rc, TMS op) {
TObject tempb, tempc;
const TObject *b, *c;
if ((b = luaV_tonumber(rb, &tempb)) != NULL &&
(c = luaV_tonumber(rc, &tempc)) != NULL) {
switch (op) {
case TM_ADD: setnvalue(ra, nvalue(b) + nvalue(c)); break;
case TM_SUB: setnvalue(ra, nvalue(b) - nvalue(c)); break;
case TM_MUL: setnvalue(ra, nvalue(b) * nvalue(c)); break;
case TM_DIV: setnvalue(ra, nvalue(b) / nvalue(c)); break;
case TM_POW: {
const TObject *f = luaH_getstr(hvalue(gt(L)), G(L)->tmname[TM_POW]);
ptrdiff_t res = savestack(L, ra);
if (!ttisfunction(f))
luaG_runerror(L, "`__pow' (`^' operator) is not a function");
callTMres(L, f, b, c);
ra = restorestack(L, res); /* previous call may change stack */
setobjs2s(ra, L->top);
break;
}
default: lua_assert(0); break;
}
}
else if (!call_binTM(L, rb, rc, ra, op))
luaG_aritherror(L, rb, rc);
}
/*
** some macros for common tasks in `luaV_execute'
*/
#define runtime_check(L, c) { if (!(c)) return 0; }
#define RA(i) (base+GETARG_A(i))
/* to be used after possible stack reallocation */
#define XRA(i) (L->base+GETARG_A(i))
#define RB(i) (base+GETARG_B(i))
#define RKB(i) ((GETARG_B(i) < MAXSTACK) ? RB(i) : k+GETARG_B(i)-MAXSTACK)
#define RC(i) (base+GETARG_C(i))
#define RKC(i) ((GETARG_C(i) < MAXSTACK) ? RC(i) : k+GETARG_C(i)-MAXSTACK)
#define KBx(i) (k+GETARG_Bx(i))
#define dojump(pc, i) ((pc) += (i))
StkId luaV_execute (lua_State *L) {
LClosure *cl;
TObject *k;
const Instruction *pc;
callentry: /* entry point when calling new functions */
if (L->hookmask & LUA_MASKCALL) {
L->ci->u.l.pc = &pc;
luaD_callhook(L, LUA_HOOKCALL, -1);
}
retentry: /* entry point when returning to old functions */
L->ci->u.l.pc = &pc;
lua_assert(L->ci->state == CI_SAVEDPC ||
L->ci->state == (CI_SAVEDPC | CI_CALLING));
L->ci->state = CI_HASFRAME; /* activate frame */
pc = L->ci->u.l.savedpc;
cl = &clvalue(L->base - 1)->l;
k = cl->p->k;
/* main loop of interpreter */
for (;;) {
const Instruction i = *pc++;
StkId base, ra;
if ((L->hookmask & (LUA_MASKLINE | LUA_MASKCOUNT)) &&
(--L->hookcount == 0 || L->hookmask & LUA_MASKLINE)) {
traceexec(L);
if (L->ci->state & CI_YIELD) { /* did hook yield? */
L->ci->u.l.savedpc = pc - 1;
L->ci->state = CI_YIELD | CI_SAVEDPC;
return NULL;
}
}
/* warning!! several calls may realloc the stack and invalidate `ra' */
base = L->base;
ra = RA(i);
lua_assert(L->ci->state & CI_HASFRAME);
lua_assert(base == L->ci->base);
lua_assert(L->top <= L->stack + L->stacksize && L->top >= base);
lua_assert(L->top == L->ci->top ||
GET_OPCODE(i) == OP_CALL || GET_OPCODE(i) == OP_TAILCALL ||
GET_OPCODE(i) == OP_RETURN || GET_OPCODE(i) == OP_SETLISTO);
switch (GET_OPCODE(i)) {
case OP_MOVE: {
setobjs2s(ra, RB(i));
break;
}
case OP_LOADK: {
setobj2s(ra, KBx(i));
break;
}
case OP_LOADBOOL: {
setbvalue(ra, GETARG_B(i));
if (GETARG_C(i)) pc++; /* skip next instruction (if C) */
break;
}
case OP_LOADNIL: {
TObject *rb = RB(i);
do {
setnilvalue(rb--);
} while (rb >= ra);
break;
}
case OP_GETUPVAL: {
int b = GETARG_B(i);
setobj2s(ra, cl->upvals[b]->v);
break;
}
case OP_GETGLOBAL: {
TObject *rb = KBx(i);
const TObject *v;
lua_assert(ttisstring(rb) && ttistable(&cl->g));
v = luaH_getstr(hvalue(&cl->g), tsvalue(rb));
if (!ttisnil(v)) { setobj2s(ra, v); }
else
setobj2s(XRA(i), luaV_index(L, &cl->g, rb, 0));
break;
}
case OP_GETTABLE: {
StkId rb = RB(i);
TObject *rc = RKC(i);
if (ttistable(rb)) {
const TObject *v = luaH_get(hvalue(rb), rc);
if (!ttisnil(v)) { setobj2s(ra, v); }
else
setobj2s(XRA(i), luaV_index(L, rb, rc, 0));
}
else
setobj2s(XRA(i), luaV_getnotable(L, rb, rc, 0));
break;
}
case OP_SETGLOBAL: {
lua_assert(ttisstring(KBx(i)) && ttistable(&cl->g));
luaV_settable(L, &cl->g, KBx(i), ra);
break;
}
case OP_SETUPVAL: {
int b = GETARG_B(i);
setobj(cl->upvals[b]->v, ra); /* write barrier */
break;
}
case OP_SETTABLE: {
luaV_settable(L, ra, RKB(i), RKC(i));
break;
}
case OP_NEWTABLE: {
int b = GETARG_B(i);
b = fb2int(b);
sethvalue(ra, luaH_new(L, b, GETARG_C(i)));
luaC_checkGC(L);
break;
}
case OP_SELF: {
StkId rb = RB(i);
TObject *rc = RKC(i);
runtime_check(L, ttisstring(rc));
setobjs2s(ra+1, rb);
if (ttistable(rb)) {
const TObject *v = luaH_getstr(hvalue(rb), tsvalue(rc));
if (!ttisnil(v)) { setobj2s(ra, v); }
else
setobj2s(XRA(i), luaV_index(L, rb, rc, 0));
}
else
setobj2s(XRA(i), luaV_getnotable(L, rb, rc, 0));
break;
}
case OP_ADD: {
TObject *rb = RKB(i);
TObject *rc = RKC(i);
if (ttisnumber(rb) && ttisnumber(rc)) {
setnvalue(ra, nvalue(rb) + nvalue(rc));
}
else
Arith(L, ra, rb, rc, TM_ADD);
break;
}
case OP_SUB: {
TObject *rb = RKB(i);
TObject *rc = RKC(i);
if (ttisnumber(rb) && ttisnumber(rc)) {
setnvalue(ra, nvalue(rb) - nvalue(rc));
}
else
Arith(L, ra, rb, rc, TM_SUB);
break;
}
case OP_MUL: {
TObject *rb = RKB(i);
TObject *rc = RKC(i);
if (ttisnumber(rb) && ttisnumber(rc)) {
setnvalue(ra, nvalue(rb) * nvalue(rc));
}
else
Arith(L, ra, rb, rc, TM_MUL);
break;
}
case OP_DIV: {
TObject *rb = RKB(i);
TObject *rc = RKC(i);
if (ttisnumber(rb) && ttisnumber(rc)) {
setnvalue(ra, nvalue(rb) / nvalue(rc));
}
else
Arith(L, ra, rb, rc, TM_DIV);
break;
}
case OP_POW: {
Arith(L, ra, RKB(i), RKC(i), TM_POW);
break;
}
case OP_UNM: {
const TObject *rb = RB(i);
TObject temp;
if (tonumber(rb, &temp)) {
setnvalue(ra, -nvalue(rb));
}
else {
setnilvalue(&temp);
if (!call_binTM(L, RB(i), &temp, ra, TM_UNM))
luaG_aritherror(L, RB(i), &temp);
}
break;
}
case OP_NOT: {
int res = l_isfalse(RB(i)); /* next assignment may change this value */
setbvalue(ra, res);
break;
}
case OP_CONCAT: {
int b = GETARG_B(i);
int c = GETARG_C(i);
luaV_concat(L, c-b+1, c); /* may change `base' (and `ra') */
base = L->base;
setobjs2s(RA(i), base+b);
luaC_checkGC(L);
break;
}
case OP_JMP: {
dojump(pc, GETARG_sBx(i));
break;
}
case OP_EQ: {
if (equalobj(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++;
else dojump(pc, GETARG_sBx(*pc) + 1);
break;
}
case OP_LT: {
if (luaV_lessthan(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++;
else dojump(pc, GETARG_sBx(*pc) + 1);
break;
}
case OP_LE: {
if (luaV_lessequal(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++;
else dojump(pc, GETARG_sBx(*pc) + 1);
break;
}
case OP_TEST: {
TObject *rb = RB(i);
if (l_isfalse(rb) == GETARG_C(i)) pc++;
else {
setobjs2s(ra, rb);
dojump(pc, GETARG_sBx(*pc) + 1);
}
break;
}
case OP_CALL:
case OP_TAILCALL: {
StkId firstResult;
int b = GETARG_B(i);
int nresults;
if (b != 0) L->top = ra+b; /* else previous instruction set top */
nresults = GETARG_C(i) - 1;
firstResult = luaD_precall(L, ra);
if (firstResult) {
if (firstResult > L->top) { /* yield? */
lua_assert(L->ci->state == (CI_C | CI_YIELD));
(L->ci - 1)->u.l.savedpc = pc;
(L->ci - 1)->state = CI_SAVEDPC;
return NULL;
}
/* it was a C function (`precall' called it); adjust results */
luaD_poscall(L, nresults, firstResult);
if (nresults >= 0) L->top = L->ci->top;
}
else { /* it is a Lua function */
if (GET_OPCODE(i) == OP_CALL) { /* regular call? */
(L->ci-1)->u.l.savedpc = pc; /* save `pc' to return later */
(L->ci-1)->state = (CI_SAVEDPC | CI_CALLING);
}
else { /* tail call: put new frame in place of previous one */
int aux;
base = (L->ci - 1)->base; /* `luaD_precall' may change the stack */
ra = RA(i);
if (L->openupval) luaF_close(L, base);
for (aux = 0; ra+aux < L->top; aux++) /* move frame down */
setobjs2s(base+aux-1, ra+aux);
(L->ci - 1)->top = L->top = base+aux; /* correct top */
lua_assert(L->ci->state & CI_SAVEDPC);
(L->ci - 1)->u.l.savedpc = L->ci->u.l.savedpc;
(L->ci - 1)->u.l.tailcalls++; /* one more call lost */
(L->ci - 1)->state = CI_SAVEDPC;
L->ci--; /* remove new frame */
L->base = L->ci->base;
}
goto callentry;
}
break;
}
case OP_RETURN: {
CallInfo *ci = L->ci - 1; /* previous function frame */
int b = GETARG_B(i);
if (b != 0) L->top = ra+b-1;
lua_assert(L->ci->state & CI_HASFRAME);
if (L->openupval) luaF_close(L, base);
L->ci->state = CI_SAVEDPC; /* deactivate current function */
L->ci->u.l.savedpc = pc;
/* previous function was running `here'? */
if (!(ci->state & CI_CALLING)) {
lua_assert((ci->state & CI_C) || ci->u.l.pc != &pc);
return ra; /* no: return */
}
else { /* yes: continue its execution */
int nresults;
lua_assert(ttisfunction(ci->base - 1) && (ci->state & CI_SAVEDPC));
lua_assert(GET_OPCODE(*(ci->u.l.savedpc - 1)) == OP_CALL);
nresults = GETARG_C(*(ci->u.l.savedpc - 1)) - 1;
luaD_poscall(L, nresults, ra);
if (nresults >= 0) L->top = L->ci->top;
goto retentry;
}
}
case OP_FORLOOP: {
lua_Number step, idx, limit;
const TObject *plimit = ra+1;
const TObject *pstep = ra+2;
if (!ttisnumber(ra))
luaG_runerror(L, "`for' initial value must be a number");
if (!tonumber(plimit, ra+1))
luaG_runerror(L, "`for' limit must be a number");
if (!tonumber(pstep, ra+2))
luaG_runerror(L, "`for' step must be a number");
step = nvalue(pstep);
idx = nvalue(ra) + step; /* increment index */
limit = nvalue(plimit);
if (step > 0 ? idx <= limit : idx >= limit) {
dojump(pc, GETARG_sBx(i)); /* jump back */
chgnvalue(ra, idx); /* update index */
}
break;
}
case OP_TFORLOOP: {
int nvar = GETARG_C(i) + 1;
StkId cb = ra + nvar + 2; /* call base */
setobjs2s(cb, ra);
setobjs2s(cb+1, ra+1);
setobjs2s(cb+2, ra+2);
L->top = cb+3; /* func. + 2 args (state and index) */
luaD_call(L, cb, nvar);
L->top = L->ci->top;
ra = XRA(i) + 2; /* final position of first result */
cb = ra + nvar;
do { /* move results to proper positions */
nvar--;
setobjs2s(ra+nvar, cb+nvar);
} while (nvar > 0);
if (ttisnil(ra)) /* break loop? */
pc++; /* skip jump (break loop) */
else
dojump(pc, GETARG_sBx(*pc) + 1); /* jump back */
break;
}
case OP_TFORPREP: { /* for compatibility only */
if (ttistable(ra)) {
setobjs2s(ra+1, ra);
setobj2s(ra, luaH_getstr(hvalue(gt(L)), luaS_new(L, "next")));
}
dojump(pc, GETARG_sBx(i));
break;
}
case OP_SETLIST:
case OP_SETLISTO: {
int bc;
int n;
Table *h;
runtime_check(L, ttistable(ra));
h = hvalue(ra);
bc = GETARG_Bx(i);
if (GET_OPCODE(i) == OP_SETLIST)
n = (bc&(LFIELDS_PER_FLUSH-1)) + 1;
else {
n = L->top - ra - 1;
L->top = L->ci->top;
}
bc &= ~(LFIELDS_PER_FLUSH-1); /* bc = bc - bc%FPF */
for (; n > 0; n--)
setobj2t(luaH_setnum(L, h, bc+n), ra+n); /* write barrier */
break;
}
case OP_CLOSE: {
luaF_close(L, ra);
break;
}
case OP_CLOSURE: {
Proto *p;
Closure *ncl;
int nup, j;
p = cl->p->p[GETARG_Bx(i)];
nup = p->nups;
ncl = luaF_newLclosure(L, nup, &cl->g);
ncl->l.p = p;
for (j=0; j<nup; j++, pc++) {
if (GET_OPCODE(*pc) == OP_GETUPVAL)
ncl->l.upvals[j] = cl->upvals[GETARG_B(*pc)];
else {
lua_assert(GET_OPCODE(*pc) == OP_MOVE);
ncl->l.upvals[j] = luaF_findupval(L, base + GETARG_B(*pc));
}
}
setclvalue(ra, ncl);
luaC_checkGC(L);
break;
}
}
}
}

35
auto3/lua/src/lvm.h Normal file
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/*
** $Id: lvm.h,v 1.47 2002/11/14 16:16:21 roberto Exp $
** Lua virtual machine
** See Copyright Notice in lua.h
*/
#ifndef lvm_h
#define lvm_h
#include "ldo.h"
#include "lobject.h"
#include "ltm.h"
#define tostring(L,o) ((ttype(o) == LUA_TSTRING) || (luaV_tostring(L, o)))
#define tonumber(o,n) (ttype(o) == LUA_TNUMBER || \
(((o) = luaV_tonumber(o,n)) != NULL))
#define equalobj(L,o1,o2) \
(ttype(o1) == ttype(o2) && luaV_equalval(L, o1, o2))
int luaV_lessthan (lua_State *L, const TObject *l, const TObject *r);
int luaV_equalval (lua_State *L, const TObject *t1, const TObject *t2);
const TObject *luaV_tonumber (const TObject *obj, TObject *n);
int luaV_tostring (lua_State *L, StkId obj);
const TObject *luaV_gettable (lua_State *L, const TObject *t, TObject *key,
int loop);
void luaV_settable (lua_State *L, const TObject *t, TObject *key, StkId val);
StkId luaV_execute (lua_State *L);
void luaV_concat (lua_State *L, int total, int last);
#endif

81
auto3/lua/src/lzio.c Normal file
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/*
** $Id: lzio.c,v 1.24 2003/03/20 16:00:56 roberto Exp $
** a generic input stream interface
** See Copyright Notice in lua.h
*/
#include <string.h>
#define lzio_c
#include "lua.h"
#include "llimits.h"
#include "lmem.h"
#include "lzio.h"
int luaZ_fill (ZIO *z) {
size_t size;
const char *buff = z->reader(NULL, z->data, &size);
if (buff == NULL || size == 0) return EOZ;
z->n = size - 1;
z->p = buff;
return char2int(*(z->p++));
}
int luaZ_lookahead (ZIO *z) {
if (z->n == 0) {
int c = luaZ_fill(z);
if (c == EOZ) return c;
z->n++;
z->p--;
}
return char2int(*z->p);
}
void luaZ_init (ZIO *z, lua_Chunkreader reader, void *data, const char *name) {
z->reader = reader;
z->data = data;
z->name = name;
z->n = 0;
z->p = NULL;
}
/* --------------------------------------------------------------- read --- */
size_t luaZ_read (ZIO *z, void *b, size_t n) {
while (n) {
size_t m;
if (z->n == 0) {
if (luaZ_fill(z) == EOZ)
return n; /* return number of missing bytes */
else {
++z->n; /* filbuf removed first byte; put back it */
--z->p;
}
}
m = (n <= z->n) ? n : z->n; /* min. between n and z->n */
memcpy(b, z->p, m);
z->n -= m;
z->p += m;
b = (char *)b + m;
n -= m;
}
return 0;
}
/* ------------------------------------------------------------------------ */
char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n) {
if (n > buff->buffsize) {
if (n < LUA_MINBUFFER) n = LUA_MINBUFFER;
luaM_reallocvector(L, buff->buffer, buff->buffsize, n, char);
buff->buffsize = n;
}
return buff->buffer;
}

64
auto3/lua/src/lzio.h Normal file
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@ -0,0 +1,64 @@
/*
** $Id: lzio.h,v 1.15 2003/03/20 16:00:56 roberto Exp $
** Buffered streams
** See Copyright Notice in lua.h
*/
#ifndef lzio_h
#define lzio_h
#include "lua.h"
#define EOZ (-1) /* end of stream */
typedef struct Zio ZIO;
#define char2int(c) cast(int, cast(unsigned char, (c)))
#define zgetc(z) (((z)->n--)>0 ? char2int(*(z)->p++) : luaZ_fill(z))
#define zname(z) ((z)->name)
void luaZ_init (ZIO *z, lua_Chunkreader reader, void *data, const char *name);
size_t luaZ_read (ZIO* z, void* b, size_t n); /* read next n bytes */
int luaZ_lookahead (ZIO *z);
typedef struct Mbuffer {
char *buffer;
size_t buffsize;
} Mbuffer;
char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n);
#define luaZ_initbuffer(L, buff) ((buff)->buffer = NULL, (buff)->buffsize = 0)
#define luaZ_sizebuffer(buff) ((buff)->buffsize)
#define luaZ_buffer(buff) ((buff)->buffer)
#define luaZ_resizebuffer(L, buff, size) \
(luaM_reallocvector(L, (buff)->buffer, (buff)->buffsize, size, char), \
(buff)->buffsize = size)
#define luaZ_freebuffer(L, buff) luaZ_resizebuffer(L, buff, 0)
/* --------- Private Part ------------------ */
struct Zio {
size_t n; /* bytes still unread */
const char *p; /* current position in buffer */
lua_Chunkreader reader;
void* data; /* additional data */
const char *name;
};
int luaZ_fill (ZIO *z);
#endif