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| 1 /* |
| 2 ** $Id: lauxlib.h,v 1.120 2011/11/29 15:55:08 roberto Exp $ |
| 3 ** Auxiliary functions for building Lua libraries |
| 4 ** See Copyright Notice in lua.h |
| 5 */ |
| 6 |
| 7 |
| 8 #ifndef lauxlib_h |
| 9 #define lauxlib_h |
| 10 |
| 11 |
| 12 #include <stddef.h> |
| 13 #include <stdio.h> |
| 14 |
| 15 #include "lua.h" |
| 16 |
| 17 |
| 18 |
| 19 /* extra error code for `luaL_load' */ |
| 20 #define LUA_ERRFILE (LUA_ERRERR+1) |
| 21 |
| 22 |
| 23 typedef struct luaL_Reg { |
| 24 const char *name; |
| 25 lua_CFunction func; |
| 26 } luaL_Reg; |
| 27 |
| 28 |
| 29 LUALIB_API void (luaL_checkversion_) (lua_State *L, lua_Number ver); |
| 30 #define luaL_checkversion(L) luaL_checkversion_(L, LUA_VERSION_NUM) |
| 31 |
| 32 LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e); |
| 33 LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e); |
| 34 LUALIB_API const char *(luaL_tolstring) (lua_State *L, int idx, size_t *len); |
| 35 LUALIB_API int (luaL_argerror) (lua_State *L, int numarg, const char *extramsg); |
| 36 LUALIB_API const char *(luaL_checklstring) (lua_State *L, int numArg, |
| 37 size_t *l); |
| 38 LUALIB_API const char *(luaL_optlstring) (lua_State *L, int numArg, |
| 39 const char *def, size_t *l); |
| 40 LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int numArg); |
| 41 LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int nArg, lua_Number def); |
| 42 |
| 43 LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int numArg); |
| 44 LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int nArg, |
| 45 lua_Integer def); |
| 46 LUALIB_API lua_Unsigned (luaL_checkunsigned) (lua_State *L, int numArg); |
| 47 LUALIB_API lua_Unsigned (luaL_optunsigned) (lua_State *L, int numArg, |
| 48 lua_Unsigned def); |
| 49 |
| 50 LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg); |
| 51 LUALIB_API void (luaL_checktype) (lua_State *L, int narg, int t); |
| 52 LUALIB_API void (luaL_checkany) (lua_State *L, int narg); |
| 53 |
| 54 LUALIB_API int (luaL_newmetatable) (lua_State *L, const char *tname); |
| 55 LUALIB_API void (luaL_setmetatable) (lua_State *L, const char *tname); |
| 56 LUALIB_API void *(luaL_testudata) (lua_State *L, int ud, const char *tname); |
| 57 LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname); |
| 58 |
| 59 LUALIB_API void (luaL_where) (lua_State *L, int lvl); |
| 60 LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...); |
| 61 |
| 62 LUALIB_API int (luaL_checkoption) (lua_State *L, int narg, const char *def, |
| 63 const char *const lst[]); |
| 64 |
| 65 LUALIB_API int (luaL_fileresult) (lua_State *L, int stat, const char *fname); |
| 66 LUALIB_API int (luaL_execresult) (lua_State *L, int stat); |
| 67 |
| 68 /* pre-defined references */ |
| 69 #define LUA_NOREF (-2) |
| 70 #define LUA_REFNIL (-1) |
| 71 |
| 72 LUALIB_API int (luaL_ref) (lua_State *L, int t); |
| 73 LUALIB_API void (luaL_unref) (lua_State *L, int t, int ref); |
| 74 |
| 75 LUALIB_API int (luaL_loadfilex) (lua_State *L, const char *filename, |
| 76 const char *mode); |
| 77 |
| 78 #define luaL_loadfile(L,f) luaL_loadfilex(L,f,NULL) |
| 79 |
| 80 LUALIB_API int (luaL_loadbufferx) (lua_State *L, const char *buff, size_t sz, |
| 81 const char *name, const char *mode); |
| 82 LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s); |
| 83 |
| 84 LUALIB_API lua_State *(luaL_newstate) (void); |
| 85 |
| 86 LUALIB_API int (luaL_len) (lua_State *L, int idx); |
| 87 |
| 88 LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p, |
| 89 const char *r); |
| 90 |
| 91 LUALIB_API void (luaL_setfuncs) (lua_State *L, const luaL_Reg *l, int nup); |
| 92 |
| 93 LUALIB_API int (luaL_getsubtable) (lua_State *L, int idx, const char *fname); |
| 94 |
| 95 LUALIB_API void (luaL_traceback) (lua_State *L, lua_State *L1, |
| 96 const char *msg, int level); |
| 97 |
| 98 LUALIB_API void (luaL_requiref) (lua_State *L, const char *modname, |
| 99 lua_CFunction openf, int glb); |
| 100 |
| 101 /* |
| 102 ** =============================================================== |
| 103 ** some useful macros |
| 104 ** =============================================================== |
| 105 */ |
| 106 |
| 107 |
| 108 #define luaL_newlibtable(L,l) \ |
| 109 lua_createtable(L, 0, sizeof(l)/sizeof((l)[0]) - 1) |
| 110 |
| 111 #define luaL_newlib(L,l) (luaL_newlibtable(L,l), luaL_setfuncs(L,l,0)) |
| 112 |
| 113 #define luaL_argcheck(L, cond,numarg,extramsg) \ |
| 114 ((void)((cond) || luaL_argerror(L, (numarg), (extramsg)))) |
| 115 #define luaL_checkstring(L,n) (luaL_checklstring(L, (n), NULL)) |
| 116 #define luaL_optstring(L,n,d) (luaL_optlstring(L, (n), (d), NULL)) |
| 117 #define luaL_checkint(L,n) ((int)luaL_checkinteger(L, (n))) |
| 118 #define luaL_optint(L,n,d) ((int)luaL_optinteger(L, (n), (d))) |
| 119 #define luaL_checklong(L,n) ((long)luaL_checkinteger(L, (n))) |
| 120 #define luaL_optlong(L,n,d) ((long)luaL_optinteger(L, (n), (d))) |
| 121 |
| 122 #define luaL_typename(L,i) lua_typename(L, lua_type(L,(i))) |
| 123 |
| 124 #define luaL_dofile(L, fn) \ |
| 125 (luaL_loadfile(L, fn) || lua_pcall(L, 0, LUA_MULTRET, 0)) |
| 126 |
| 127 #define luaL_dostring(L, s) \ |
| 128 (luaL_loadstring(L, s) || lua_pcall(L, 0, LUA_MULTRET, 0)) |
| 129 |
| 130 #define luaL_getmetatable(L,n) (lua_getfield(L, LUA_REGISTRYINDEX, (n))) |
| 131 |
| 132 #define luaL_opt(L,f,n,d) (lua_isnoneornil(L,(n)) ? (d) : f(L,(n))) |
| 133 |
| 134 #define luaL_loadbuffer(L,s,sz,n) luaL_loadbufferx(L,s,sz,n,NULL) |
| 135 |
| 136 |
| 137 /* |
| 138 ** {====================================================== |
| 139 ** Generic Buffer manipulation |
| 140 ** ======================================================= |
| 141 */ |
| 142 |
| 143 typedef struct luaL_Buffer { |
| 144 char *b; /* buffer address */ |
| 145 size_t size; /* buffer size */ |
| 146 size_t n; /* number of characters in buffer */ |
| 147 lua_State *L; |
| 148 char initb[LUAL_BUFFERSIZE]; /* initial buffer */ |
| 149 } luaL_Buffer; |
| 150 |
| 151 |
| 152 #define luaL_addchar(B,c) \ |
| 153 ((void)((B)->n < (B)->size || luaL_prepbuffsize((B), 1)), \ |
| 154 ((B)->b[(B)->n++] = (c))) |
| 155 |
| 156 #define luaL_addsize(B,s) ((B)->n += (s)) |
| 157 |
| 158 LUALIB_API void (luaL_buffinit) (lua_State *L, luaL_Buffer *B); |
| 159 LUALIB_API char *(luaL_prepbuffsize) (luaL_Buffer *B, size_t sz); |
| 160 LUALIB_API void (luaL_addlstring) (luaL_Buffer *B, const char *s, size_t l); |
| 161 LUALIB_API void (luaL_addstring) (luaL_Buffer *B, const char *s); |
| 162 LUALIB_API void (luaL_addvalue) (luaL_Buffer *B); |
| 163 LUALIB_API void (luaL_pushresult) (luaL_Buffer *B); |
| 164 LUALIB_API void (luaL_pushresultsize) (luaL_Buffer *B, size_t sz); |
| 165 LUALIB_API char *(luaL_buffinitsize) (lua_State *L, luaL_Buffer *B, size_t sz); |
| 166 |
| 167 #define luaL_prepbuffer(B) luaL_prepbuffsize(B, LUAL_BUFFERSIZE) |
| 168 |
| 169 /* }====================================================== */ |
| 170 |
| 171 |
| 172 |
| 173 /* |
| 174 ** {====================================================== |
| 175 ** File handles for IO library |
| 176 ** ======================================================= |
| 177 */ |
| 178 |
| 179 /* |
| 180 ** A file handle is a userdata with metatable 'LUA_FILEHANDLE' and |
| 181 ** initial structure 'luaL_Stream' (it may contain other fields |
| 182 ** after that initial structure). |
| 183 */ |
| 184 |
| 185 #define LUA_FILEHANDLE "FILE*" |
| 186 |
| 187 |
| 188 typedef struct luaL_Stream { |
| 189 FILE *f; /* stream (NULL for incompletely created streams) */ |
| 190 lua_CFunction closef; /* to close stream (NULL for closed streams) */ |
| 191 } luaL_Stream; |
| 192 |
| 193 /* }====================================================== */ |
| 194 |
| 195 |
| 196 |
| 197 /* compatibility with old module system */ |
| 198 #if defined(LUA_COMPAT_MODULE) |
| 199 |
| 200 LUALIB_API void (luaL_pushmodule) (lua_State *L, const char *modname, |
| 201 int sizehint); |
| 202 LUALIB_API void (luaL_openlib) (lua_State *L, const char *libname, |
| 203 const luaL_Reg *l, int nup); |
| 204 |
| 205 #define luaL_register(L,n,l) (luaL_openlib(L,(n),(l),0)) |
| 206 |
| 207 #endif |
| 208 |
| 209 |
| 210 #endif |
| 211 |
| 212 |
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