/*
** $Id: lauxlib.h,v 1.88.1.1 2007/12/27 13:02:25 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"

/* extra error code for `luaL_load' */
#define LUA_ERRFILE (LUA_ERRERR + 1)

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 void(luaL_register)(lua_State* L, const char* libname, const luaL_Reg* l);
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 lua_Integer(luaL_checkinteger)(lua_State* L, int numArg);
LUALIB_API lua_Integer(luaL_optinteger)(lua_State* L, int nArg, lua_Integer 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_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_checkoption)(lua_State* L, int narg, const char* def, const char* const lst[]);

/* pre-defined references */
#define LUA_NOREF (-2)
#define LUA_REFNIL (-1)

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_loadfile)(lua_State* L, const char* filename);
LUALIB_API int(luaL_loadbuffer)(lua_State* L, const char* buff, size_t sz, const char* name);
LUALIB_API int(luaL_loadstring)(lua_State* L, const char* s);

LUALIB_API lua_State*(luaL_newstate)(void);

LUALIB_API const char*(luaL_gsub)(lua_State * L, const char* s, const char* p, const char* r);

LUALIB_API const char*(luaL_findtable)(lua_State * L, int idx, const char* fname, int szhint);

/* From Lua 5.2. */
LUALIB_API int luaL_fileresult(lua_State* L, int stat, const char* fname);
LUALIB_API int luaL_execresult(lua_State* L, int stat);
LUALIB_API int(luaL_loadfilex)(lua_State* L, const char* filename, const char* mode);
LUALIB_API int(luaL_loadbufferx)(lua_State* L, const char* buff, size_t sz, const char* name, const char* mode);
LUALIB_API void luaL_traceback(lua_State* L, lua_State* L1, const char* msg, int level);
LUALIB_API void(luaL_setfuncs)(lua_State* L, const luaL_Reg* l, int nup);
LUALIB_API void(luaL_pushmodule)(lua_State* L, const char* modname, int sizehint);
LUALIB_API void*(luaL_testudata)(lua_State * L, int ud, const char* tname);
LUALIB_API void(luaL_setmetatable)(lua_State* L, const char* tname);

/*
** ===============================================================
** some useful macros
** ===============================================================
*/

#define luaL_argcheck(L, cond, numarg, extramsg) ((void)((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_checkinteger(L, (n)))
#define luaL_optint(L, n, d) ((int)luaL_optinteger(L, (n), (d)))
#define luaL_checklong(L, n) ((long)luaL_checkinteger(L, (n)))
#define luaL_optlong(L, n, d) ((long)luaL_optinteger(L, (n), (d)))

#define luaL_typename(L, i) lua_typename(L, lua_type(L, (i)))

#define luaL_dofile(L, fn) (luaL_loadfile(L, fn) || lua_pcall(L, 0, LUA_MULTRET, 0))

#define luaL_dostring(L, s) (luaL_loadstring(L, s) || lua_pcall(L, 0, LUA_MULTRET, 0))

#define luaL_getmetatable(L, n) (lua_getfield(L, LUA_REGISTRYINDEX, (n)))

#define luaL_opt(L, f, n, d) (lua_isnoneornil(L, (n)) ? (d) : f(L, (n)))

/* From Lua 5.2. */
#define luaL_newlibtable(L, l) lua_createtable(L, 0, sizeof(l) / sizeof((l)[0]) - 1)
#define luaL_newlib(L, l) (luaL_newlibtable(L, l), luaL_setfuncs(L, l, 0))

/*
** {======================================================
** Generic Buffer manipulation
** =======================================================
*/

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_addchar(B, c)                                                                                             \
  ((void)((B)->p < ((B)->buffer + LUAL_BUFFERSIZE) || luaL_prepbuffer(B)), (*(B)->p++ = (char)(c)))

/* compatibility only */
#define luaL_putchar(B, c) luaL_addchar(B, 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);

/* }====================================================== */

#endif