2 ** $Id: lua.h,v 1.218.1.7 2012/01/13 20:36:20 roberto Exp $
3 ** Lua - An Extensible Extension Language
4 ** Lua.org, PUC-Rio, Brazil (http://www.lua.org)
5 ** See Copyright Notice at the end of this file
17 #if defined(LUA_CORE) || defined(LUA_LIB) || defined(lua_c)
18 # include "luaconf_internal.h"
22 #define LUA_VERSION "Lua 5.1"
23 #define LUA_RELEASE "Lua 5.1.5"
24 #define LUA_VERSION_NUM 501
25 #define LUA_COPYRIGHT "Copyright (C) 1994-2012 Lua.org, PUC-Rio" " (" LUA_LNUM ")"
26 #define LUA_AUTHORS "R. Ierusalimschy, L. H. de Figueiredo & W. Celes"
29 /* mark for precompiled code (`<esc>Lua') */
30 #define LUA_SIGNATURE "\033Lua"
32 /* option for multiple returns in `lua_pcall' and `lua_call' */
33 #define LUA_MULTRET (-1)
39 #define LUA_REGISTRYINDEX (-10000)
40 #define LUA_ENVIRONINDEX (-10001)
41 #define LUA_GLOBALSINDEX (-10002)
42 #define lua_upvalueindex(i) (LUA_GLOBALSINDEX-(i))
45 /* thread status; 0 is OK */
48 #define LUA_ERRSYNTAX 3
53 typedef struct lua_State lua_State;
55 typedef int (*lua_CFunction) (lua_State *L);
59 ** functions that read/write blocks when loading/dumping Lua chunks
61 typedef const char * (*lua_Reader) (lua_State *L, void *ud, size_t *sz);
63 typedef int (*lua_Writer) (lua_State *L, const void* p, size_t sz, void* ud);
67 ** prototype for memory-allocation functions
69 typedef void * (*lua_Alloc) (void *ud, void *ptr, size_t osize, size_t nsize);
75 #define LUA_TNONE (-1)
77 /* LUA_TINT is an internal type, not visible to applications. There are many
78 * potential values where it can be tweaked to (code autoadjusts to these):
80 * -2: not 'usual' type value; good since 'LUA_TINT' is not part of the API
81 * LUA_TNUMBER+1: shifts other type values upwards, breaking binary compatibility
82 * not acceptable for 5.1, maybe 5.2 onwards?
83 * 9: greater than existing (5.1) type values.
84 * -13 (0xff..f3) or 0x13: 'ttisnumber()' and 'ttype_ext()' can be reduced to
85 * bitmask operation instead of conditional (may be good for pipelined processors)
87 #if defined(LNUM_INT32) || defined(LNUM_INT64)
88 # define LUA_TINT (-2)
92 #define LUA_TBOOLEAN 1
93 #define LUA_TLIGHTUSERDATA 2
97 #define LUA_TFUNCTION 6
98 #define LUA_TUSERDATA 7
103 /* minimum Lua stack available to a C function */
104 #define LUA_MINSTACK 20
108 ** generic extra include file
110 #if defined(LUA_USER_H)
115 /* type of numbers in Lua */
116 typedef LUA_NUMBER lua_Number;
119 /* type for integer functions */
120 typedef LUA_INTEGER lua_Integer;
125 ** state manipulation
127 LUA_API lua_State *(lua_newstate) (lua_Alloc f, void *ud);
128 LUA_API void (lua_close) (lua_State *L);
129 LUA_API lua_State *(lua_newthread) (lua_State *L);
131 LUA_API lua_CFunction (lua_atpanic) (lua_State *L, lua_CFunction panicf);
135 ** basic stack manipulation
137 LUA_API int (lua_gettop) (lua_State *L);
138 LUA_API void (lua_settop) (lua_State *L, int idx);
139 LUA_API void (lua_pushvalue) (lua_State *L, int idx);
140 LUA_API void (lua_remove) (lua_State *L, int idx);
141 LUA_API void (lua_insert) (lua_State *L, int idx);
142 LUA_API void (lua_replace) (lua_State *L, int idx);
143 LUA_API int (lua_checkstack) (lua_State *L, int sz);
145 LUA_API void (lua_xmove) (lua_State *from, lua_State *to, int n);
149 ** access functions (stack -> C)
152 LUA_API int (lua_isnumber) (lua_State *L, int idx);
153 LUA_API int (lua_isstring) (lua_State *L, int idx);
154 LUA_API int (lua_iscfunction) (lua_State *L, int idx);
155 LUA_API int (lua_isuserdata) (lua_State *L, int idx);
156 LUA_API int (lua_type) (lua_State *L, int idx);
157 LUA_API const char *(lua_typename) (lua_State *L, int tp);
159 LUA_API int (lua_isinteger) (lua_State *L, int idx);
161 LUA_API int (lua_equal) (lua_State *L, int idx1, int idx2);
162 LUA_API int (lua_rawequal) (lua_State *L, int idx1, int idx2);
163 LUA_API int (lua_lessthan) (lua_State *L, int idx1, int idx2);
165 LUA_API lua_Number (lua_tonumber) (lua_State *L, int idx);
166 LUA_API lua_Integer (lua_tointeger) (lua_State *L, int idx);
167 LUA_API int (lua_toboolean) (lua_State *L, int idx);
168 LUA_API const char *(lua_tolstring) (lua_State *L, int idx, size_t *len);
169 LUA_API size_t (lua_objlen) (lua_State *L, int idx);
170 LUA_API lua_CFunction (lua_tocfunction) (lua_State *L, int idx);
171 LUA_API void *(lua_touserdata) (lua_State *L, int idx);
172 LUA_API lua_State *(lua_tothread) (lua_State *L, int idx);
173 LUA_API const void *(lua_topointer) (lua_State *L, int idx);
177 ** push functions (C -> stack)
179 LUA_API void (lua_pushnil) (lua_State *L);
180 LUA_API void (lua_pushnumber) (lua_State *L, lua_Number n);
181 LUA_API void (lua_pushinteger) (lua_State *L, lua_Integer n);
182 LUA_API void (lua_pushlstring) (lua_State *L, const char *s, size_t l);
183 LUA_API void (lua_pushstring) (lua_State *L, const char *s);
184 LUA_API const char *(lua_pushvfstring) (lua_State *L, const char *fmt,
186 LUA_API const char *(lua_pushfstring) (lua_State *L, const char *fmt, ...);
187 LUA_API void (lua_pushcclosure) (lua_State *L, lua_CFunction fn, int n);
188 LUA_API void (lua_pushboolean) (lua_State *L, int b);
189 LUA_API void (lua_pushlightuserdata) (lua_State *L, void *p);
190 LUA_API int (lua_pushthread) (lua_State *L);
194 ** get functions (Lua -> stack)
196 LUA_API void (lua_gettable) (lua_State *L, int idx);
197 LUA_API void (lua_getfield) (lua_State *L, int idx, const char *k);
198 LUA_API void (lua_rawget) (lua_State *L, int idx);
199 LUA_API void (lua_rawgeti) (lua_State *L, int idx, int n);
200 LUA_API void (lua_createtable) (lua_State *L, int narr, int nrec);
201 LUA_API void *(lua_newuserdata) (lua_State *L, size_t sz);
202 LUA_API int (lua_getmetatable) (lua_State *L, int objindex);
203 LUA_API void (lua_getfenv) (lua_State *L, int idx);
207 ** set functions (stack -> Lua)
209 LUA_API void (lua_settable) (lua_State *L, int idx);
210 LUA_API void (lua_setfield) (lua_State *L, int idx, const char *k);
211 LUA_API void (lua_rawset) (lua_State *L, int idx);
212 LUA_API void (lua_rawseti) (lua_State *L, int idx, int n);
213 LUA_API int (lua_setmetatable) (lua_State *L, int objindex);
214 LUA_API int (lua_setfenv) (lua_State *L, int idx);
218 ** `load' and `call' functions (load and run Lua code)
220 LUA_API void (lua_call) (lua_State *L, int nargs, int nresults);
221 LUA_API int (lua_pcall) (lua_State *L, int nargs, int nresults, int errfunc);
222 LUA_API int (lua_cpcall) (lua_State *L, lua_CFunction func, void *ud);
223 LUA_API int (lua_load) (lua_State *L, lua_Reader reader, void *dt,
224 const char *chunkname);
226 LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data);
230 ** coroutine functions
232 LUA_API int (lua_yield) (lua_State *L, int nresults);
233 LUA_API int (lua_resume) (lua_State *L, int narg);
234 LUA_API int (lua_status) (lua_State *L);
237 ** garbage-collection function and options
241 #define LUA_GCRESTART 1
242 #define LUA_GCCOLLECT 2
243 #define LUA_GCCOUNT 3
244 #define LUA_GCCOUNTB 4
246 #define LUA_GCSETPAUSE 6
247 #define LUA_GCSETSTEPMUL 7
249 LUA_API int (lua_gc) (lua_State *L, int what, int data);
253 ** miscellaneous functions
256 LUA_API int (lua_error) (lua_State *L);
258 LUA_API int (lua_next) (lua_State *L, int idx);
260 LUA_API void (lua_concat) (lua_State *L, int n);
262 LUA_API lua_Alloc (lua_getallocf) (lua_State *L, void **ud);
263 LUA_API void lua_setallocf (lua_State *L, lua_Alloc f, void *ud);
267 * It is unnecessary to break Lua C API 'lua_tonumber()' compatibility, just
268 * because the Lua number type is complex. Most C modules would use scalars
269 * only. We'll introduce new 'lua_tocomplex' and 'lua_pushcomplex' for when
270 * the module really wants to use them.
274 typedef LUA_NUMBER complex lua_Complex;
275 LUA_API lua_Complex (lua_tocomplex) (lua_State *L, int idx);
276 LUA_API void (lua_pushcomplex) (lua_State *L, lua_Complex v);
281 ** ===============================================================
282 ** some useful macros
283 ** ===============================================================
286 #define lua_pop(L,n) lua_settop(L, -(n)-1)
288 #define lua_newtable(L) lua_createtable(L, 0, 0)
290 #define lua_register(L,n,f) (lua_pushcfunction(L, (f)), lua_setglobal(L, (n)))
292 #define lua_pushcfunction(L,f) lua_pushcclosure(L, (f), 0)
294 #define lua_strlen(L,i) lua_objlen(L, (i))
296 #define lua_isfunction(L,n) (lua_type(L, (n)) == LUA_TFUNCTION)
297 #define lua_istable(L,n) (lua_type(L, (n)) == LUA_TTABLE)
298 #define lua_islightuserdata(L,n) (lua_type(L, (n)) == LUA_TLIGHTUSERDATA)
299 #define lua_isnil(L,n) (lua_type(L, (n)) == LUA_TNIL)
300 #define lua_isboolean(L,n) (lua_type(L, (n)) == LUA_TBOOLEAN)
301 #define lua_isthread(L,n) (lua_type(L, (n)) == LUA_TTHREAD)
302 #define lua_isnone(L,n) (lua_type(L, (n)) == LUA_TNONE)
305 # define lua_isnoneornil(L, n) ( (lua_type(L,(n)) <= 0) && (lua_type(L,(n)) != LUA_TINT) )
307 # define lua_isnoneornil(L, n) (lua_type(L, (n)) <= 0)
310 #define lua_pushliteral(L, s) \
311 lua_pushlstring(L, "" s, (sizeof(s)/sizeof(char))-1)
313 #define lua_setglobal(L,s) lua_setfield(L, LUA_GLOBALSINDEX, (s))
314 #define lua_getglobal(L,s) lua_getfield(L, LUA_GLOBALSINDEX, (s))
316 #define lua_tostring(L,i) lua_tolstring(L, (i), NULL)
321 ** compatibility macros and functions
324 #define lua_open() luaL_newstate()
326 #define lua_getregistry(L) lua_pushvalue(L, LUA_REGISTRYINDEX)
328 #define lua_getgccount(L) lua_gc(L, LUA_GCCOUNT, 0)
330 #define lua_Chunkreader lua_Reader
331 #define lua_Chunkwriter lua_Writer
335 LUA_API void lua_setlevel (lua_State *from, lua_State *to);
339 ** {======================================================================
341 ** =======================================================================
348 #define LUA_HOOKCALL 0
349 #define LUA_HOOKRET 1
350 #define LUA_HOOKLINE 2
351 #define LUA_HOOKCOUNT 3
352 #define LUA_HOOKTAILRET 4
358 #define LUA_MASKCALL (1 << LUA_HOOKCALL)
359 #define LUA_MASKRET (1 << LUA_HOOKRET)
360 #define LUA_MASKLINE (1 << LUA_HOOKLINE)
361 #define LUA_MASKCOUNT (1 << LUA_HOOKCOUNT)
363 typedef struct lua_Debug lua_Debug; /* activation record */
366 /* Functions to be called by the debuger in specific events */
367 typedef void (*lua_Hook) (lua_State *L, lua_Debug *ar);
370 LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar);
371 LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar);
372 LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n);
373 LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n);
374 LUA_API const char *lua_getupvalue (lua_State *L, int funcindex, int n);
375 LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n);
377 LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count);
378 LUA_API lua_Hook lua_gethook (lua_State *L);
379 LUA_API int lua_gethookmask (lua_State *L);
380 LUA_API int lua_gethookcount (lua_State *L);
385 const char *name; /* (n) */
386 const char *namewhat; /* (n) `global', `local', `field', `method' */
387 const char *what; /* (S) `Lua', `C', `main', `tail' */
388 const char *source; /* (S) */
389 int currentline; /* (l) */
390 int nups; /* (u) number of upvalues */
391 int linedefined; /* (S) */
392 int lastlinedefined; /* (S) */
393 char short_src[LUA_IDSIZE]; /* (S) */
395 int i_ci; /* active function */
398 /* }====================================================================== */
401 /******************************************************************************
402 * Copyright (C) 1994-2012 Lua.org, PUC-Rio. All rights reserved.
404 * Permission is hereby granted, free of charge, to any person obtaining
405 * a copy of this software and associated documentation files (the
406 * "Software"), to deal in the Software without restriction, including
407 * without limitation the rights to use, copy, modify, merge, publish,
408 * distribute, sublicense, and/or sell copies of the Software, and to
409 * permit persons to whom the Software is furnished to do so, subject to
410 * the following conditions:
412 * The above copyright notice and this permission notice shall be
413 * included in all copies or substantial portions of the Software.
415 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
416 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
417 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
418 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
419 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
420 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
421 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
422 ******************************************************************************/