/*
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** $Id: lauxlib.h,v 1.88.1.1 2007/12/27 13:02:25 roberto Exp $
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** Auxiliary functions for building Lua libraries
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** See Copyright Notice in lua.h
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*/
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#ifndef lauxlib_h
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#define lauxlib_h
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#include <stddef.h>
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#include <stdio.h>
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#include "lua.h"
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#if defined(LUA_COMPAT_GETN)
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LUALIB_API int (luaL_getn) (lua_State *L, int t);
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LUALIB_API void (luaL_setn) (lua_State *L, int t, int n);
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#else
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#define luaL_getn(L,i) ((int)lua_objlen(L, i))
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#define luaL_setn(L,i,j) ((void)0) /* no op! */
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#endif
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#if defined(LUA_COMPAT_OPENLIB)
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#define luaI_openlib luaL_openlib
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#endif
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/* extra error code for `luaL_load' */
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#define LUA_ERRFILE (LUA_ERRERR+1)
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typedef struct luaL_Reg {
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const char *name;
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lua_CFunction func;
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} luaL_Reg;
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LUALIB_API void (luaI_openlib) (lua_State *L, const char *libname,
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const luaL_Reg *l, int nup);
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LUALIB_API void (luaL_register) (lua_State *L, const char *libname,
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const luaL_Reg *l);
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LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e);
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LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e);
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LUALIB_API int (luaL_typerror) (lua_State *L, int narg, const char *tname);
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LUALIB_API int (luaL_argerror) (lua_State *L, int numarg, const char *extramsg);
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LUALIB_API const char *(luaL_checklstring) (lua_State *L, int numArg,
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size_t *l);
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LUALIB_API const char *(luaL_optlstring) (lua_State *L, int numArg,
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const char *def, size_t *l);
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LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int numArg);
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LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int nArg, lua_Number def);
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LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int numArg);
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LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int nArg,
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lua_Integer def);
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LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg);
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LUALIB_API void (luaL_checktype) (lua_State *L, int narg, int t);
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LUALIB_API void (luaL_checkany) (lua_State *L, int narg);
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LUALIB_API int (luaL_newmetatable) (lua_State *L, const char *tname);
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LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname);
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LUALIB_API void (luaL_where) (lua_State *L, int lvl);
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LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...);
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LUALIB_API int (luaL_checkoption) (lua_State *L, int narg, const char *def,
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const char *const lst[]);
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LUALIB_API int (luaL_ref) (lua_State *L, int t);
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LUALIB_API void (luaL_unref) (lua_State *L, int t, int ref);
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LUALIB_API int (luaL_loadfile) (lua_State *L, const char *filename);
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LUALIB_API int (luaL_loadbuffer) (lua_State *L, const char *buff, size_t sz,
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const char *name);
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LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s);
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LUALIB_API lua_State *(luaL_newstate) (void);
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LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p,
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const char *r);
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LUALIB_API const char *(luaL_findtable) (lua_State *L, int idx,
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const char *fname, int szhint);
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/*
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** ===============================================================
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** some useful macros
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** ===============================================================
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*/
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#define luaL_argcheck(L, cond,numarg,extramsg) \
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((void)((cond) || luaL_argerror(L, (numarg), (extramsg))))
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#define luaL_checkstring(L,n) (luaL_checklstring(L, (n), NULL))
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#define luaL_optstring(L,n,d) (luaL_optlstring(L, (n), (d), NULL))
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#define luaL_checkint(L,n) ((int)luaL_checkinteger(L, (n)))
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#define luaL_optint(L,n,d) ((int)luaL_optinteger(L, (n), (d)))
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#define luaL_checklong(L,n) ((long)luaL_checkinteger(L, (n)))
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#define luaL_optlong(L,n,d) ((long)luaL_optinteger(L, (n), (d)))
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#define luaL_typename(L,i) lua_typename(L, lua_type(L,(i)))
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#define luaL_dofile(L, fn) \
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(luaL_loadfile(L, fn) || lua_pcall(L, 0, LUA_MULTRET, 0))
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#define luaL_dostring(L, s) \
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(luaL_loadstring(L, s) || lua_pcall(L, 0, LUA_MULTRET, 0))
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#define luaL_getmetatable(L,n) (lua_getfield(L, LUA_REGISTRYINDEX, (n)))
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#define luaL_opt(L,f,n,d) (lua_isnoneornil(L,(n)) ? (d) : f(L,(n)))
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/*
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** {======================================================
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** Generic Buffer manipulation
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** =======================================================
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*/
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typedef struct luaL_Buffer {
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char *p; /* current position in buffer */
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int lvl; /* number of strings in the stack (level) */
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lua_State *L;
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char buffer[LUAL_BUFFERSIZE];
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} luaL_Buffer;
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#define luaL_addchar(B,c) \
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((void)((B)->p < ((B)->buffer+LUAL_BUFFERSIZE) || luaL_prepbuffer(B)), \
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(*(B)->p++ = (char)(c)))
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/* compatibility only */
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#define luaL_putchar(B,c) luaL_addchar(B,c)
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#define luaL_addsize(B,n) ((B)->p += (n))
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LUALIB_API void (luaL_buffinit) (lua_State *L, luaL_Buffer *B);
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LUALIB_API char *(luaL_prepbuffer) (luaL_Buffer *B);
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LUALIB_API void (luaL_addlstring) (luaL_Buffer *B, const char *s, size_t l);
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LUALIB_API void (luaL_addstring) (luaL_Buffer *B, const char *s);
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LUALIB_API void (luaL_addvalue) (luaL_Buffer *B);
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LUALIB_API void (luaL_pushresult) (luaL_Buffer *B);
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/* }====================================================== */
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/* compatibility with ref system */
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/* pre-defined references */
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#define LUA_NOREF (-2)
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#define LUA_REFNIL (-1)
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#define lua_ref(L,lock) ((lock) ? luaL_ref(L, LUA_REGISTRYINDEX) : \
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(lua_pushstring(L, "unlocked references are obsolete"), lua_error(L), 0))
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#define lua_unref(L,ref) luaL_unref(L, LUA_REGISTRYINDEX, (ref))
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#define lua_getref(L,ref) lua_rawgeti(L, LUA_REGISTRYINDEX, (ref))
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#define luaL_reg luaL_Reg
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#endif
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