lua/lauxlib.h

101 lines
2.9 KiB
C

/*
** $Id: lauxlib.h,v 1.30 2000/10/30 12:38:50 roberto Exp roberto $
** 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"
#ifndef LUALIB_API
#define LUALIB_API extern
#endif
struct luaL_reg {
const char *name;
lua_CFunction func;
};
LUALIB_API void luaL_openlib (lua_State *L, const struct luaL_reg *l, int n);
LUALIB_API void luaL_argerror (lua_State *L, int numarg, const char *extramsg);
LUALIB_API const char *luaL_check_lstr (lua_State *L, int numArg, size_t *len);
LUALIB_API const char *luaL_opt_lstr (lua_State *L, int numArg, const char *def, size_t *len);
LUALIB_API lua_Number luaL_check_number (lua_State *L, int numArg);
LUALIB_API lua_Number luaL_opt_number (lua_State *L, int nArg, lua_Number def);
LUALIB_API void luaL_checkstack (lua_State *L, int space, 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 void luaL_verror (lua_State *L, const char *fmt, ...);
LUALIB_API int luaL_findstring (const char *name, const char *const list[]);
/*
** ===============================================================
** some useful macros
** ===============================================================
*/
#define luaL_arg_check(L, cond,numarg,extramsg) if (!(cond)) \
luaL_argerror(L, numarg,extramsg)
#define luaL_check_string(L,n) (luaL_check_lstr(L, (n), NULL))
#define luaL_opt_string(L,n,d) (luaL_opt_lstr(L, (n), (d), NULL))
#define luaL_check_int(L,n) ((int)luaL_check_number(L, n))
#define luaL_check_long(L,n) ((long)luaL_check_number(L, n))
#define luaL_opt_int(L,n,d) ((int)luaL_opt_number(L, n,d))
#define luaL_opt_long(L,n,d) ((long)luaL_opt_number(L, n,d))
#define luaL_openl(L,a) luaL_openlib(L, a, (sizeof(a)/sizeof(a[0])))
/*
** {======================================================
** Generic Buffer manipulation
** =======================================================
*/
#ifndef LUAL_BUFFERSIZE
#define LUAL_BUFFERSIZE BUFSIZ
#endif
typedef struct luaL_Buffer {
char *p; /* current position in buffer */
int level;
lua_State *L;
char buffer[LUAL_BUFFERSIZE];
} luaL_Buffer;
#define luaL_putchar(B,c) \
((void)((B)->p < &(B)->buffer[LUAL_BUFFERSIZE] || luaL_prepbuffer(B)), \
(*(B)->p++ = (char)(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