mia/Aegisub
1
0
Fork 1
Code Issues Pull requests Projects Releases Wiki Activity

Fixed loading utf8-bom Lua scripts

Browse source 
Originally committed to SVN as r688.
This commit is contained in:
Niels Martin Hansen 2007-01-03 03:39:15 +00:00
parent 679367af9d
commit cb08347bdc
1 changed files with 81 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

83
aegisub/auto4_lua.cpp
View file

@ -38,6 +38,7 @@
#include "ass_style.h"
#include "ass_file.h"
#include "ass_override.h"
#include "text_file_reader.h"
#include <lualib.h>
#include <lauxlib.h>
#include <wx/msgdlg.h>
@ -93,13 +94,89 @@ namespace Automation4 {
#endif
// LuaScriptReader
struct LuaScriptReader {
FILE *f;
bool first;
char *databuf;
static const size_t bufsize = 512;
LuaScriptReader(const wxString &filename)
{
#ifdef WIN32
f = _tfopen(filename.c_str(), _T("rb"));
#else
f = fopen(filename.c_str(), _T("rb"));
#endif
first = true;
databuf = new char[bufsize];
}
~LuaScriptReader()
{
if (databuf)
delete databuf;
fclose(f);
}
static const char* reader_func(lua_State *L, void *data, size_t *size)
{
LuaScriptReader *self = (LuaScriptReader*)(data);
unsigned char *b = (unsigned char *)self->databuf;
FILE *f = self->f;
if (feof(f)) {
*size = 0;
return 0;
}
if (self->first) {
// check if file is sensible and maybe skip bom
if ((*size = fread(b, 1, 4, f)) == 4) {
if (b[0] == 0xEF && b[1] == 0xBB && b[2] == 0xBF) {
// got an utf8 file with bom
// nothing further to do, already skipped the bom
fseek(f, -1, SEEK_CUR);
} else {
// oops, not utf8 with bom
// check if there is some other BOM in place and complain if there is...
if ((b[0] == 0xFF && b[1] == 0xFE && b[2] == 0x00 && b[3] == 0x00) || // utf32be
(b[0] == 0x00 && b[1] == 0x00 && b[2] == 0xFE && b[3] == 0xFF) || // utf32le
(b[0] == 0xFF && b[1] == 0xFE) || // utf16be
(b[0] == 0xFE && b[1] == 0xFF) || // utf16le
(b[0] == 0x2B && b[1] == 0x2F && b[2] == 0x76) || // utf7
(b[0] == 0x00 && b[2] == 0x00) || // looks like utf16be
(b[1] == 0x00 && b[3] == 0x00)) { // looks like utf16le
throw _T("The script file uses an unsupported character set. Only UTF-8 is supported.");
}
// assume utf8 without bom, and rewind file
fseek(f, 0, SEEK_SET);
}
} else {
// hmm, rather short file this...
// doesn't have a bom, assume it's just ascii/utf8 without bom
return self->databuf; // *size is already set
}
self->first = false;
}
*size = fread(b, 1, bufsize, f);
return self->databuf;
}
};
// LuaScript
LuaScript::LuaScript(const wxString &filename)
: Script(filename)
, L(0)
{
Create();
try {
Create();
}
catch (wxChar *e) {
description = e;
}
}
LuaScript::~LuaScript()
@ -160,7 +237,9 @@ namespace Automation4 {
_stackcheck.check(0);
// load user script
if (luaL_loadfile(L, GetFilename().mb_str(wxConvUTF8))) {
LuaScriptReader script_reader(GetFilename());
if (lua_load(L, script_reader.reader_func, &script_reader, GetFilename().mb_str(wxConvUTF8))) {
//if (luaL_loadfile(L, GetFilename().mb_str(wxConvUTF8))) {
wxString *err = new wxString(lua_tostring(L, -1), wxConvUTF8);
err->Prepend(_T("An error occurred loading the Lua script file \"") + GetFilename() + _T("\":\n\n"));
throw err->c_str();