mirror of
https://github.com/lunarmodules/lua-iconv.git
synced 2025-06-22 20:24:36 +02:00
124 lines
2.7 KiB
C
124 lines
2.7 KiB
C
/*
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* luaiconv - Performs character set conversions in Lua
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* (c) 2005 Alexandre Erwin Ittner <aittner@netuno.com.br>
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*
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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*
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* $Id$
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*
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*/
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#include <lua.h>
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#include <lauxlib.h>
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#include <stdlib.h>
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#include <iconv.h>
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#define LIB_NAME "iconv"
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#define ICONV_TYPENAME "iconv_t"
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#define getstring luaL_checkstring
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#define getostring(L, i) luaL_optstring(L, i, NULL)
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static void push_iconv_t(lua_State *L, iconv_t cd)
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{
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lua_boxpointer(L, cd);
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luaL_getmetatable(L, ICONV_TYPENAME);
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lua_setmetatable(L, -2);
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}
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static iconv_t get_iconv_t(lua_State *L, int i)
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{
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if(luaL_checkudata(L, i, ICONV_TYPENAME) != NULL)
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{
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iconv_t cd = lua_unboxpointer(L, i);
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if(cd == (iconv_t) NULL)
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luaL_error(L, "attempt to use an invalid " ICONV_TYPENAME);
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return cd;
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}
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luaL_typerror(L, i, ICONV_TYPENAME);
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return NULL;
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}
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static int Linconv_open(lua_State *L)
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{
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const char *fromcode = getstring(L, 1);
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const char *tocode = getstring(L, 2);
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iconv_t cd = iconv_open(tocode, fromcode);
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if(cd != (iconv_t)(-1))
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push_iconv_t(L, cd); /* ok */
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else
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lua_pushnil(L); /* erro */
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return 1;
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}
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static int Liconv_close(lua_State *L)
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{
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iconv_t cd = get_iconv_t(L, 1);
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if(iconv_close(cd) == 0)
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lua_pushboolean(L, 1); /* ok */
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else
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lua_pushnil(L); /* erro */
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return 1;
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}
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static const luaL_reg inconvFuncs[] =
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{
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{ "open", Linconv_open },
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{ "new", Linconv_open },
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{ "iconv", Linconv_open },
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{ NULL, NULL }
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};
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static const luaL_reg iconvMT[] =
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{
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{ "__gc", Liconv_close },
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{ NULL, NULL }
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};
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int luaopen_iconv(lua_State *L)
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{
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luaL_openlib(L, LIB_NAME, inconvFuncs, 0);
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lua_pushliteral(L, "metatable"); /* metatable */
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luaL_newmetatable(L, ICONV_TYPENAME);
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lua_pushliteral(L, "__index");
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lua_pushvalue(L, -4);
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lua_settable(L, -3);
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luaL_openlib(L, NULL, iconvMT, 0);
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lua_settable(L, -3);
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return 0;
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}
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