1 /* 2 ** $Id: lua.h,v 1.218.1.5 2008/08/06 13:30:12 roberto Exp $ 3 ** Lua - An Extensible Extension Language 4 ** Lua.org, PUC-Rio, Brazil (https://www.lua.org) 5 ** See Copyright Notice at the end of this file 6 */ 7 8 9 #ifndef lua_h 10 #define lua_h 11 12 #include <stdarg.h> 13 #include <stddef.h> 14 15 16 #include "luaconf.h" 17 18 19 #define LUA_VERSION "Lua 5.1" 20 #define LUA_RELEASE "Lua 5.1.4" 21 #define LUA_VERSION_NUM 501 22 #define LUA_COPYRIGHT "Copyright (C) 1994-2008 Lua.org, PUC-Rio" 23 #define LUA_AUTHORS "R. Ierusalimschy, L. H. de Figueiredo & W. Celes" 24 25 26 /* mark for precompiled code (`<esc>Lua') */ 27 #define LUA_SIGNATURE "\033Lua" 28 29 /* option for multiple returns in `lua_pcall' and `lua_call' */ 30 #define LUA_MULTRET (-1) 31 32 33 /* 34 ** pseudo-indices 35 */ 36 #define LUA_REGISTRYINDEX (-10000) 37 #define LUA_ENVIRONINDEX (-10001) 38 #define LUA_GLOBALSINDEX (-10002) 39 #define lua_upvalueindex(i) (LUA_GLOBALSINDEX-(i)) 40 41 42 /* thread status */ 43 #define LUA_OK 0 44 #define LUA_YIELD 1 45 #define LUA_ERRRUN 2 46 #define LUA_ERRSYNTAX 3 47 #define LUA_ERRMEM 4 48 #define LUA_ERRERR 5 49 50 51 typedef struct lua_State lua_State; 52 53 typedef int (*lua_CFunction) (lua_State *L); 54 55 56 /* 57 ** functions that read/write blocks when loading/dumping Lua chunks 58 */ 59 typedef const char * (*lua_Reader) (lua_State *L, void *ud, size_t *sz); 60 61 typedef int (*lua_Writer) (lua_State *L, const void* p, size_t sz, void* ud); 62 63 64 /* 65 ** prototype for memory-allocation functions 66 */ 67 typedef void * (*lua_Alloc) (void *ud, void *ptr, size_t osize, size_t nsize); 68 69 70 /* 71 ** basic types 72 */ 73 #define LUA_TNONE (-1) 74 75 #define LUA_TNIL 0 76 #define LUA_TBOOLEAN 1 77 #define LUA_TLIGHTUSERDATA 2 78 #define LUA_TNUMBER 3 79 #define LUA_TSTRING 4 80 #define LUA_TTABLE 5 81 #define LUA_TFUNCTION 6 82 #define LUA_TUSERDATA 7 83 #define LUA_TTHREAD 8 84 85 86 87 /* minimum Lua stack available to a C function */ 88 #define LUA_MINSTACK 20 89 90 91 /* 92 ** generic extra include file 93 */ 94 #if defined(LUA_USER_H) 95 #include LUA_USER_H 96 #endif 97 98 99 /* type of numbers in Lua */ 100 typedef LUA_NUMBER lua_Number; 101 102 103 /* type for integer functions */ 104 typedef LUA_INTEGER lua_Integer; 105 106 107 108 /* 109 ** state manipulation 110 */ 111 LUA_API lua_State *(lua_newstate) (lua_Alloc f, void *ud); 112 LUA_API void (lua_close) (lua_State *L); 113 LUA_API lua_State *(lua_newthread) (lua_State *L); 114 115 LUA_API lua_CFunction (lua_atpanic) (lua_State *L, lua_CFunction panicf); 116 117 118 /* 119 ** basic stack manipulation 120 */ 121 LUA_API int (lua_gettop) (lua_State *L); 122 LUA_API void (lua_settop) (lua_State *L, int idx); 123 LUA_API void (lua_pushvalue) (lua_State *L, int idx); 124 LUA_API void (lua_remove) (lua_State *L, int idx); 125 LUA_API void (lua_insert) (lua_State *L, int idx); 126 LUA_API void (lua_replace) (lua_State *L, int idx); 127 LUA_API int (lua_checkstack) (lua_State *L, int sz); 128 129 LUA_API void (lua_xmove) (lua_State *from, lua_State *to, int n); 130 131 132 /* 133 ** access functions (stack -> C) 134 */ 135 136 LUA_API int (lua_isnumber) (lua_State *L, int idx); 137 LUA_API int (lua_isstring) (lua_State *L, int idx); 138 LUA_API int (lua_iscfunction) (lua_State *L, int idx); 139 LUA_API int (lua_isuserdata) (lua_State *L, int idx); 140 LUA_API int (lua_type) (lua_State *L, int idx); 141 LUA_API const char *(lua_typename) (lua_State *L, int tp); 142 143 LUA_API int (lua_equal) (lua_State *L, int idx1, int idx2); 144 LUA_API int (lua_rawequal) (lua_State *L, int idx1, int idx2); 145 LUA_API int (lua_lessthan) (lua_State *L, int idx1, int idx2); 146 147 LUA_API lua_Number (lua_tonumber) (lua_State *L, int idx); 148 LUA_API lua_Integer (lua_tointeger) (lua_State *L, int idx); 149 LUA_API int (lua_toboolean) (lua_State *L, int idx); 150 LUA_API const char *(lua_tolstring) (lua_State *L, int idx, size_t *len); 151 LUA_API size_t (lua_objlen) (lua_State *L, int idx); 152 LUA_API lua_CFunction (lua_tocfunction) (lua_State *L, int idx); 153 LUA_API void *(lua_touserdata) (lua_State *L, int idx); 154 LUA_API lua_State *(lua_tothread) (lua_State *L, int idx); 155 LUA_API const void *(lua_topointer) (lua_State *L, int idx); 156 157 158 /* 159 ** push functions (C -> stack) 160 */ 161 LUA_API void (lua_pushnil) (lua_State *L); 162 LUA_API void (lua_pushnumber) (lua_State *L, lua_Number n); 163 LUA_API void (lua_pushinteger) (lua_State *L, lua_Integer n); 164 LUA_API void (lua_pushlstring) (lua_State *L, const char *s, size_t l); 165 LUA_API void (lua_pushstring) (lua_State *L, const char *s); 166 LUA_API const char *(lua_pushvfstring) (lua_State *L, const char *fmt, 167 va_list argp); 168 LUA_API const char *(lua_pushfstring) (lua_State *L, const char *fmt, ...); 169 LUA_API void (lua_pushcclosure) (lua_State *L, lua_CFunction fn, int n); 170 LUA_API void (lua_pushboolean) (lua_State *L, int b); 171 LUA_API void (lua_pushlightuserdata) (lua_State *L, void *p); 172 LUA_API int (lua_pushthread) (lua_State *L); 173 174 175 /* 176 ** get functions (Lua -> stack) 177 */ 178 LUA_API void (lua_gettable) (lua_State *L, int idx); 179 LUA_API void (lua_getfield) (lua_State *L, int idx, const char *k); 180 LUA_API void (lua_rawget) (lua_State *L, int idx); 181 LUA_API void (lua_rawgeti) (lua_State *L, int idx, int n); 182 LUA_API void (lua_createtable) (lua_State *L, int narr, int nrec); 183 LUA_API void *(lua_newuserdata) (lua_State *L, size_t sz); 184 LUA_API int (lua_getmetatable) (lua_State *L, int objindex); 185 LUA_API void (lua_getfenv) (lua_State *L, int idx); 186 187 188 /* 189 ** set functions (stack -> Lua) 190 */ 191 LUA_API void (lua_settable) (lua_State *L, int idx); 192 LUA_API void (lua_setfield) (lua_State *L, int idx, const char *k); 193 LUA_API void (lua_rawset) (lua_State *L, int idx); 194 LUA_API void (lua_rawseti) (lua_State *L, int idx, int n); 195 LUA_API int (lua_setmetatable) (lua_State *L, int objindex); 196 LUA_API int (lua_setfenv) (lua_State *L, int idx); 197 198 199 /* 200 ** `load' and `call' functions (load and run Lua code) 201 */ 202 LUA_API void (lua_call) (lua_State *L, int nargs, int nresults); 203 LUA_API int (lua_pcall) (lua_State *L, int nargs, int nresults, int errfunc); 204 LUA_API int (lua_cpcall) (lua_State *L, lua_CFunction func, void *ud); 205 LUA_API int (lua_load) (lua_State *L, lua_Reader reader, void *dt, 206 const char *chunkname); 207 208 LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data); 209 210 211 /* 212 ** coroutine functions 213 */ 214 LUA_API int (lua_yield) (lua_State *L, int nresults); 215 LUA_API int (lua_resume) (lua_State *L, int narg); 216 LUA_API int (lua_status) (lua_State *L); 217 218 /* 219 ** garbage-collection function and options 220 */ 221 222 #define LUA_GCSTOP 0 223 #define LUA_GCRESTART 1 224 #define LUA_GCCOLLECT 2 225 #define LUA_GCCOUNT 3 226 #define LUA_GCCOUNTB 4 227 #define LUA_GCSTEP 5 228 #define LUA_GCSETPAUSE 6 229 #define LUA_GCSETSTEPMUL 7 230 #define LUA_GCISRUNNING 9 231 232 LUA_API int (lua_gc) (lua_State *L, int what, int data); 233 234 235 /* 236 ** miscellaneous functions 237 */ 238 239 LUA_API int (lua_error) (lua_State *L); 240 241 LUA_API int (lua_next) (lua_State *L, int idx); 242 243 LUA_API void (lua_concat) (lua_State *L, int n); 244 245 LUA_API lua_Alloc (lua_getallocf) (lua_State *L, void **ud); 246 LUA_API void lua_setallocf (lua_State *L, lua_Alloc f, void *ud); 247 248 249 250 /* 251 ** =============================================================== 252 ** some useful macros 253 ** =============================================================== 254 */ 255 256 #define lua_pop(L,n) lua_settop(L, -(n)-1) 257 258 #define lua_newtable(L) lua_createtable(L, 0, 0) 259 260 #define lua_register(L,n,f) (lua_pushcfunction(L, (f)), lua_setglobal(L, (n))) 261 262 #define lua_pushcfunction(L,f) lua_pushcclosure(L, (f), 0) 263 264 #define lua_strlen(L,i) lua_objlen(L, (i)) 265 266 #define lua_isfunction(L,n) (lua_type(L, (n)) == LUA_TFUNCTION) 267 #define lua_istable(L,n) (lua_type(L, (n)) == LUA_TTABLE) 268 #define lua_islightuserdata(L,n) (lua_type(L, (n)) == LUA_TLIGHTUSERDATA) 269 #define lua_isnil(L,n) (lua_type(L, (n)) == LUA_TNIL) 270 #define lua_isboolean(L,n) (lua_type(L, (n)) == LUA_TBOOLEAN) 271 #define lua_isthread(L,n) (lua_type(L, (n)) == LUA_TTHREAD) 272 #define lua_isnone(L,n) (lua_type(L, (n)) == LUA_TNONE) 273 #define lua_isnoneornil(L, n) (lua_type(L, (n)) <= 0) 274 275 #define lua_pushliteral(L, s) \ 276 lua_pushlstring(L, "" s, (sizeof(s)/sizeof(char))-1) 277 278 #define lua_setglobal(L,s) lua_setfield(L, LUA_GLOBALSINDEX, (s)) 279 #define lua_getglobal(L,s) lua_getfield(L, LUA_GLOBALSINDEX, (s)) 280 281 #define lua_tostring(L,i) lua_tolstring(L, (i), NULL) 282 283 284 285 /* 286 ** compatibility macros and functions 287 */ 288 289 #define lua_open() luaL_newstate() 290 291 #define lua_getregistry(L) lua_pushvalue(L, LUA_REGISTRYINDEX) 292 293 #define lua_getgccount(L) lua_gc(L, LUA_GCCOUNT, 0) 294 295 #define lua_Chunkreader lua_Reader 296 #define lua_Chunkwriter lua_Writer 297 298 299 /* hack */ 300 LUA_API void lua_setlevel (lua_State *from, lua_State *to); 301 302 303 /* 304 ** {====================================================================== 305 ** Debug API 306 ** ======================================================================= 307 */ 308 309 310 /* 311 ** Event codes 312 */ 313 #define LUA_HOOKCALL 0 314 #define LUA_HOOKRET 1 315 #define LUA_HOOKLINE 2 316 #define LUA_HOOKCOUNT 3 317 #define LUA_HOOKTAILRET 4 318 319 320 /* 321 ** Event masks 322 */ 323 #define LUA_MASKCALL (1 << LUA_HOOKCALL) 324 #define LUA_MASKRET (1 << LUA_HOOKRET) 325 #define LUA_MASKLINE (1 << LUA_HOOKLINE) 326 #define LUA_MASKCOUNT (1 << LUA_HOOKCOUNT) 327 328 typedef struct lua_Debug lua_Debug; /* activation record */ 329 330 331 /* Functions to be called by the debuger in specific events */ 332 typedef void (*lua_Hook) (lua_State *L, lua_Debug *ar); 333 334 335 LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar); 336 LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar); 337 LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n); 338 LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n); 339 LUA_API const char *lua_getupvalue (lua_State *L, int funcindex, int n); 340 LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n); 341 LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count); 342 LUA_API lua_Hook lua_gethook (lua_State *L); 343 LUA_API int lua_gethookmask (lua_State *L); 344 LUA_API int lua_gethookcount (lua_State *L); 345 346 /* From Lua 5.2. */ 347 LUA_API void *lua_upvalueid (lua_State *L, int idx, int n); 348 LUA_API void lua_upvaluejoin (lua_State *L, int idx1, int n1, int idx2, int n2); 349 LUA_API int lua_loadx (lua_State *L, lua_Reader reader, void *dt, 350 const char *chunkname, const char *mode); 351 LUA_API const lua_Number *lua_version (lua_State *L); 352 LUA_API void lua_copy (lua_State *L, int fromidx, int toidx); 353 LUA_API lua_Number lua_tonumberx (lua_State *L, int idx, int *isnum); 354 LUA_API lua_Integer lua_tointegerx (lua_State *L, int idx, int *isnum); 355 356 /* From Lua 5.3. */ 357 LUA_API int lua_isyieldable (lua_State *L); 358 359 360 struct lua_Debug { 361 int event; 362 const char *name; /* (n) */ 363 const char *namewhat; /* (n) `global', `local', `field', `method' */ 364 const char *what; /* (S) `Lua', `C', `main', `tail' */ 365 const char *source; /* (S) */ 366 int currentline; /* (l) */ 367 int nups; /* (u) number of upvalues */ 368 int linedefined; /* (S) */ 369 int lastlinedefined; /* (S) */ 370 char short_src[LUA_IDSIZE]; /* (S) */ 371 /* private part */ 372 int i_ci; /* active function */ 373 }; 374 375 /* }====================================================================== */ 376 377 378 /****************************************************************************** 379 * Copyright (C) 1994-2008 Lua.org, PUC-Rio. All rights reserved. 380 * 381 * Permission is hereby granted, free of charge, to any person obtaining 382 * a copy of this software and associated documentation files (the 383 * "Software"), to deal in the Software without restriction, including 384 * without limitation the rights to use, copy, modify, merge, publish, 385 * distribute, sublicense, and/or sell copies of the Software, and to 386 * permit persons to whom the Software is furnished to do so, subject to 387 * the following conditions: 388 * 389 * The above copyright notice and this permission notice shall be 390 * included in all copies or substantial portions of the Software. 391 * 392 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 393 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 394 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 395 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 396 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 397 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 398 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 399 ******************************************************************************/ 400 401 402 #endif 403