Editando: lauxlib.h
/* ** $Id: lauxlib.h,v 1.131 2016/12/06 14:54:31 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_loadfilex' */ #define LUA_ERRFILE (LUA_ERRERR+1) /* key, in the registry, for table of loaded modules */ #define LUA_LOADED_TABLE "_LOADED" /* key, in the registry, for table of preloaded loaders */ #define LUA_PRELOAD_TABLE "_PRELOAD" typedef struct luaL_Reg { const char *name; lua_CFunction func; } luaL_Reg; #define LUAL_NUMSIZES (sizeof(lua_Integer)*16 + sizeof(lua_Number)) LUALIB_API void (luaL_checkversion_) (lua_State *L, lua_Number ver, size_t sz); #define luaL_checkversion(L) \ luaL_checkversion_(L, LUA_VERSION_NUM, LUAL_NUMSIZES) 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 const char *(luaL_tolstring) (lua_State *L, int idx, size_t *len); LUALIB_API int (luaL_argerror) (lua_State *L, int arg, const char *extramsg); LUALIB_API const char *(luaL_checklstring) (lua_State *L, int arg, size_t *l); LUALIB_API const char *(luaL_optlstring) (lua_State *L, int arg, const char *def, size_t *l); LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int arg); LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int arg, lua_Number def); LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int arg); LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int arg, 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 arg, int t); LUALIB_API void (luaL_checkany) (lua_State *L, int arg); LUALIB_API int (luaL_newmetatable) (lua_State *L, const char *tname); LUALIB_API void (luaL_setmetatable) (lua_State *L, const char *tname); LUALIB_API void *(luaL_testudata) (lua_State *L, int ud, 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 arg, const char *def, const char *const lst[]); LUALIB_API int (luaL_fileresult) (lua_State *L, int stat, const char *fname); LUALIB_API int (luaL_execresult) (lua_State *L, int stat); /* predefined 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_loadfilex) (lua_State *L, const char *filename, const char *mode); #define luaL_loadfile(L,f) luaL_loadfilex(L,f,NULL) LUALIB_API int (luaL_loadbufferx) (lua_State *L, const char *buff, size_t sz, const char *name, const char *mode); LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s); LUALIB_API lua_State *(luaL_newstate) (void); LUALIB_API lua_Integer (luaL_len) (lua_State *L, int idx); LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p, const char *r); LUALIB_API void (luaL_setfuncs) (lua_State *L, const luaL_Reg *l, int nup); LUALIB_API int (luaL_getsubtable) (lua_State *L, int idx, const char *fname); LUALIB_API void (luaL_traceback) (lua_State *L, lua_State *L1, const char *msg, int level); LUALIB_API void (luaL_requiref) (lua_State *L, const char *modname, lua_CFunction openf, int glb); /* ** =============================================================== ** some useful macros ** =============================================================== */ #define luaL_newlibtable(L,l) \ lua_createtable(L, 0, sizeof(l)/sizeof((l)[0]) - 1) #define luaL_newlib(L,l) \ (luaL_checkversion(L), luaL_newlibtable(L,l), luaL_setfuncs(L,l,0)) #define luaL_argcheck(L, cond,arg,extramsg) \ ((void)((cond) || luaL_argerror(L, (arg), (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_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))) #define luaL_loadbuffer(L,s,sz,n) luaL_loadbufferx(L,s,sz,n,NULL) /* ** {====================================================== ** Generic Buffer manipulation ** ======================================================= */ typedef struct luaL_Buffer { char *b; /* buffer address */ size_t size; /* buffer size */ size_t n; /* number of characters in buffer */ lua_State *L; char initb[LUAL_BUFFERSIZE]; /* initial buffer */ } luaL_Buffer; #define luaL_addchar(B,c) \ ((void)((B)->n < (B)->size || luaL_prepbuffsize((B), 1)), \ ((B)->b[(B)->n++] = (c))) #define luaL_addsize(B,s) ((B)->n += (s)) LUALIB_API void (luaL_buffinit) (lua_State *L, luaL_Buffer *B); LUALIB_API char *(luaL_prepbuffsize) (luaL_Buffer *B, size_t sz); 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); LUALIB_API void (luaL_pushresultsize) (luaL_Buffer *B, size_t sz); LUALIB_API char *(luaL_buffinitsize) (lua_State *L, luaL_Buffer *B, size_t sz); #define luaL_prepbuffer(B) luaL_prepbuffsize(B, LUAL_BUFFERSIZE) /* }====================================================== */ /* ** {====================================================== ** File handles for IO library ** ======================================================= */ /* ** A file handle is a userdata with metatable 'LUA_FILEHANDLE' and ** initial structure 'luaL_Stream' (it may contain other fields ** after that initial structure). */ #define LUA_FILEHANDLE "FILE*" typedef struct luaL_Stream { FILE *f; /* stream (NULL for incompletely created streams) */ lua_CFunction closef; /* to close stream (NULL for closed streams) */ } luaL_Stream; /* }====================================================== */ /* compatibility with old module system */ #if defined(LUA_COMPAT_MODULE) LUALIB_API void (luaL_pushmodule) (lua_State *L, const char *modname, int sizehint); LUALIB_API void (luaL_openlib) (lua_State *L, const char *libname, const luaL_Reg *l, int nup); #define luaL_register(L,n,l) (luaL_openlib(L,(n),(l),0)) #endif /* ** {================================================================== ** "Abstraction Layer" for basic report of messages and errors ** =================================================================== */ /* print a string */ #if !defined(lua_writestring) #define lua_writestring(s,l) fwrite((s), sizeof(char), (l), stdout) #endif /* print a newline and flush the output */ #if !defined(lua_writeline) #define lua_writeline() (lua_writestring("\n", 1), fflush(stdout)) #endif /* print an error message */ #if !defined(lua_writestringerror) #define lua_writestringerror(s,p) \ (fprintf(stderr, (s), (p)), fflush(stderr)) #endif /* }================================================================== */ /* ** {============================================================ ** Compatibility with deprecated conversions ** ============================================================= */ #if defined(LUA_COMPAT_APIINTCASTS) #define luaL_checkunsigned(L,a) ((lua_Unsigned)luaL_checkinteger(L,a)) #define luaL_optunsigned(L,a,d) \ ((lua_Unsigned)luaL_optinteger(L,a,(lua_Integer)(d))) #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))) #endif /* }============================================================ */ #endif
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