forked from mia/Aegisub
9492192b73
In preparation for switching to LuaJIT, which doesn't support PUC Lua's thing of using C++ exceptions for lua_error. Requires replacing all uses of lua_error (and things calling lua_error) with custom versions that throw an exception instead and adding an exception -> lua error wrapper at all C++ -> Lua boundaries.
105 lines
2 KiB
C
105 lines
2 KiB
C
/*
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* luabins.c
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* Luabins Lua module code
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* See copyright notice in luabins.h
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*/
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#include "luaheaders.h"
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#include "luabins.h"
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#include "saveload.h"
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/*
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* On success returns data string.
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* On failure returns nil and error message.
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*/
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static int l_save(lua_State * L)
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{
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int error = luabins_save(L, 1, lua_gettop(L));
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if (error == 0)
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{
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return 1;
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}
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lua_pushnil(L);
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lua_replace(L, -3); /* Put nil before error message on stack */
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return 2;
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}
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/*
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* On success returns true and loaded data tuple.
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* On failure returns nil and error message.
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*/
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static int l_load(lua_State * L)
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{
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int count = 0;
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int error = 0;
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size_t len = 0;
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const unsigned char * data = (const unsigned char *)luaL_checklstring(
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L, 1, &len
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);
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lua_pushboolean(L, 1);
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error = luabins_load(L, data, len, &count);
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if (error == 0)
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{
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return count + 1;
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}
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lua_pushnil(L);
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lua_replace(L, -3); /* Put nil before error message on stack */
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return 2;
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}
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/* luabins Lua module API */
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static const struct luaL_reg R[] =
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{
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{ "save", l_save },
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{ "load", l_load },
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{ NULL, NULL }
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};
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#ifdef __cplusplus
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extern "C" {
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#endif
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LUALIB_API int luaopen_luabins(lua_State * L)
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{
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/*
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* Compile-time checks for size constants.
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* Consult PORTABILITY WARNING in saveload.h before changing constants.
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*/
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/* int is too small on your platform, fix LUABINS_LINT */
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luabins_static_assert(sizeof(int) >= LUABINS_LINT);
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/* size_t is too small on your platform, fix LUABINS_LSIZET */
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luabins_static_assert(sizeof(size_t) >= LUABINS_LSIZET);
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/* unexpected lua_Number size, fix LUABINS_LNUMBER */
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luabins_static_assert(sizeof(lua_Number) == LUABINS_LNUMBER);
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/*
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* Register module
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*/
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luaL_register(L, "luabins", R);
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/*
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* Register module information
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*/
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lua_pushliteral(L, LUABINS_VERSION);
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lua_setfield(L, -2, "_VERSION");
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lua_pushliteral(L, LUABINS_COPYRIGHT);
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lua_setfield(L, -2, "_COPYRIGHT");
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lua_pushliteral(L, LUABINS_DESCRIPTION);
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lua_setfield(L, -2, "_DESCRIPTION");
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return 1;
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}
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#ifdef __cplusplus
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}
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#endif
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