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ba8b5c17 1/*
2** $Id: lua.h,v 1.285 2013/03/15 13:04:22 roberto Exp $
3** Lua - A Scripting Language
4** Lua.org, PUC-Rio, Brazil (http://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_MAJOR "5"
20#define LUA_VERSION_MINOR "2"
21#define LUA_VERSION_NUM 502
22#define LUA_VERSION_RELEASE "2"
23
24#define LUA_VERSION "Lua " LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
25#define LUA_RELEASE LUA_VERSION "." LUA_VERSION_RELEASE
26#define LUA_COPYRIGHT LUA_RELEASE " Copyright (C) 1994-2013 Lua.org, PUC-Rio"
27#define LUA_AUTHORS "R. Ierusalimschy, L. H. de Figueiredo, W. Celes"
28
29
30/* mark for precompiled code ('<esc>Lua') */
31#define LUA_SIGNATURE "\033Lua"
32
33/* option for multiple returns in 'lua_pcall' and 'lua_call' */
34#define LUA_MULTRET (-1)
35
36
37/*
38** pseudo-indices
39*/
40#define LUA_REGISTRYINDEX LUAI_FIRSTPSEUDOIDX
41#define lua_upvalueindex(i) (LUA_REGISTRYINDEX - (i))
42
43
44/* thread status */
45#define LUA_OK 0
46#define LUA_YIELD 1
47#define LUA_ERRRUN 2
48#define LUA_ERRSYNTAX 3
49#define LUA_ERRMEM 4
50#define LUA_ERRGCMM 5
51#define LUA_ERRERR 6
52
53
54typedef struct lua_State lua_State;
55
56typedef int (*lua_CFunction) (lua_State *L);
57
58
59/*
60** functions that read/write blocks when loading/dumping Lua chunks
61*/
62typedef const char * (*lua_Reader) (lua_State *L, void *ud, size_t *sz);
63
64typedef int (*lua_Writer) (lua_State *L, const void* p, size_t sz, void* ud);
65
66
67/*
68** prototype for memory-allocation functions
69*/
70typedef void * (*lua_Alloc) (void *ud, void *ptr, size_t osize, size_t nsize);
71
72
73/*
74** basic types
75*/
76#define LUA_TNONE (-1)
77
78#define LUA_TNIL 0
79#define LUA_TBOOLEAN 1
80#define LUA_TLIGHTUSERDATA 2
81#define LUA_TNUMBER 3
82#define LUA_TSTRING 4
83#define LUA_TTABLE 5
84#define LUA_TFUNCTION 6
85#define LUA_TUSERDATA 7
86#define LUA_TTHREAD 8
87
88#define LUA_NUMTAGS 9
89
90
91
92/* minimum Lua stack available to a C function */
93#define LUA_MINSTACK 20
94
95
96/* predefined values in the registry */
97#define LUA_RIDX_MAINTHREAD 1
98#define LUA_RIDX_GLOBALS 2
99#define LUA_RIDX_LAST LUA_RIDX_GLOBALS
100
101
102/* type of numbers in Lua */
103typedef LUA_NUMBER lua_Number;
104
105
106/* type for integer functions */
107typedef LUA_INTEGER lua_Integer;
108
109/* unsigned integer type */
110typedef LUA_UNSIGNED lua_Unsigned;
111
112
113
114/*
115** generic extra include file
116*/
117#if defined(LUA_USER_H)
118#include LUA_USER_H
119#endif
120
121
122/*
123** RCS ident string
124*/
125extern const char lua_ident[];
126
127
128/*
129** state manipulation
130*/
131LUA_API lua_State *(lua_newstate) (lua_Alloc f, void *ud);
132LUA_API void (lua_close) (lua_State *L);
133LUA_API lua_State *(lua_newthread) (lua_State *L);
134
135LUA_API lua_CFunction (lua_atpanic) (lua_State *L, lua_CFunction panicf);
136
137
138LUA_API const lua_Number *(lua_version) (lua_State *L);
139
140
141/*
142** basic stack manipulation
143*/
144LUA_API int (lua_absindex) (lua_State *L, int idx);
145LUA_API int (lua_gettop) (lua_State *L);
146LUA_API void (lua_settop) (lua_State *L, int idx);
147LUA_API void (lua_pushvalue) (lua_State *L, int idx);
148LUA_API void (lua_remove) (lua_State *L, int idx);
149LUA_API void (lua_insert) (lua_State *L, int idx);
150LUA_API void (lua_replace) (lua_State *L, int idx);
151LUA_API void (lua_copy) (lua_State *L, int fromidx, int toidx);
152LUA_API int (lua_checkstack) (lua_State *L, int sz);
153
154LUA_API void (lua_xmove) (lua_State *from, lua_State *to, int n);
155
156
157/*
158** access functions (stack -> C)
159*/
160
161LUA_API int (lua_isnumber) (lua_State *L, int idx);
162LUA_API int (lua_isstring) (lua_State *L, int idx);
163LUA_API int (lua_iscfunction) (lua_State *L, int idx);
164LUA_API int (lua_isuserdata) (lua_State *L, int idx);
165LUA_API int (lua_type) (lua_State *L, int idx);
166LUA_API const char *(lua_typename) (lua_State *L, int tp);
167
168LUA_API lua_Number (lua_tonumberx) (lua_State *L, int idx, int *isnum);
169LUA_API lua_Integer (lua_tointegerx) (lua_State *L, int idx, int *isnum);
170LUA_API lua_Unsigned (lua_tounsignedx) (lua_State *L, int idx, int *isnum);
171LUA_API int (lua_toboolean) (lua_State *L, int idx);
172LUA_API const char *(lua_tolstring) (lua_State *L, int idx, size_t *len);
173LUA_API size_t (lua_rawlen) (lua_State *L, int idx);
174LUA_API lua_CFunction (lua_tocfunction) (lua_State *L, int idx);
175LUA_API void *(lua_touserdata) (lua_State *L, int idx);
176LUA_API lua_State *(lua_tothread) (lua_State *L, int idx);
177LUA_API const void *(lua_topointer) (lua_State *L, int idx);
178
179
180/*
181** Comparison and arithmetic functions
182*/
183
184#define LUA_OPADD 0 /* ORDER TM */
185#define LUA_OPSUB 1
186#define LUA_OPMUL 2
187#define LUA_OPDIV 3
188#define LUA_OPMOD 4
189#define LUA_OPPOW 5
190#define LUA_OPUNM 6
191
192LUA_API void (lua_arith) (lua_State *L, int op);
193
194#define LUA_OPEQ 0
195#define LUA_OPLT 1
196#define LUA_OPLE 2
197
198LUA_API int (lua_rawequal) (lua_State *L, int idx1, int idx2);
199LUA_API int (lua_compare) (lua_State *L, int idx1, int idx2, int op);
200
201
202/*
203** push functions (C -> stack)
204*/
205LUA_API void (lua_pushnil) (lua_State *L);
206LUA_API void (lua_pushnumber) (lua_State *L, lua_Number n);
207LUA_API void (lua_pushinteger) (lua_State *L, lua_Integer n);
208LUA_API void (lua_pushunsigned) (lua_State *L, lua_Unsigned n);
209LUA_API const char *(lua_pushlstring) (lua_State *L, const char *s, size_t l);
210LUA_API const char *(lua_pushstring) (lua_State *L, const char *s);
211LUA_API const char *(lua_pushvfstring) (lua_State *L, const char *fmt,
212 va_list argp);
213LUA_API const char *(lua_pushfstring) (lua_State *L, const char *fmt, ...);
214LUA_API void (lua_pushcclosure) (lua_State *L, lua_CFunction fn, int n);
215LUA_API void (lua_pushboolean) (lua_State *L, int b);
216LUA_API void (lua_pushlightuserdata) (lua_State *L, void *p);
217LUA_API int (lua_pushthread) (lua_State *L);
218
219
220/*
221** get functions (Lua -> stack)
222*/
223LUA_API void (lua_getglobal) (lua_State *L, const char *var);
224LUA_API void (lua_gettable) (lua_State *L, int idx);
225LUA_API void (lua_getfield) (lua_State *L, int idx, const char *k);
226LUA_API void (lua_rawget) (lua_State *L, int idx);
227LUA_API void (lua_rawgeti) (lua_State *L, int idx, int n);
228LUA_API void (lua_rawgetp) (lua_State *L, int idx, const void *p);
229LUA_API void (lua_createtable) (lua_State *L, int narr, int nrec);
230LUA_API void *(lua_newuserdata) (lua_State *L, size_t sz);
231LUA_API int (lua_getmetatable) (lua_State *L, int objindex);
232LUA_API void (lua_getuservalue) (lua_State *L, int idx);
233
234
235/*
236** set functions (stack -> Lua)
237*/
238LUA_API void (lua_setglobal) (lua_State *L, const char *var);
239LUA_API void (lua_settable) (lua_State *L, int idx);
240LUA_API void (lua_setfield) (lua_State *L, int idx, const char *k);
241LUA_API void (lua_rawset) (lua_State *L, int idx);
242LUA_API void (lua_rawseti) (lua_State *L, int idx, int n);
243LUA_API void (lua_rawsetp) (lua_State *L, int idx, const void *p);
244LUA_API int (lua_setmetatable) (lua_State *L, int objindex);
245LUA_API void (lua_setuservalue) (lua_State *L, int idx);
246
247
248/*
249** 'load' and 'call' functions (load and run Lua code)
250*/
251LUA_API void (lua_callk) (lua_State *L, int nargs, int nresults, int ctx,
252 lua_CFunction k);
253#define lua_call(L,n,r) lua_callk(L, (n), (r), 0, NULL)
254
255LUA_API int (lua_getctx) (lua_State *L, int *ctx);
256
257LUA_API int (lua_pcallk) (lua_State *L, int nargs, int nresults, int errfunc,
258 int ctx, lua_CFunction k);
259#define lua_pcall(L,n,r,f) lua_pcallk(L, (n), (r), (f), 0, NULL)
260
261LUA_API int (lua_load) (lua_State *L, lua_Reader reader, void *dt,
262 const char *chunkname,
263 const char *mode);
264
265LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data);
266
267
268/*
269** coroutine functions
270*/
271LUA_API int (lua_yieldk) (lua_State *L, int nresults, int ctx,
272 lua_CFunction k);
273#define lua_yield(L,n) lua_yieldk(L, (n), 0, NULL)
274LUA_API int (lua_resume) (lua_State *L, lua_State *from, int narg);
275LUA_API int (lua_status) (lua_State *L);
276
277/*
278** garbage-collection function and options
279*/
280
281#define LUA_GCSTOP 0
282#define LUA_GCRESTART 1
283#define LUA_GCCOLLECT 2
284#define LUA_GCCOUNT 3
285#define LUA_GCCOUNTB 4
286#define LUA_GCSTEP 5
287#define LUA_GCSETPAUSE 6
288#define LUA_GCSETSTEPMUL 7
289#define LUA_GCSETMAJORINC 8
290#define LUA_GCISRUNNING 9
291#define LUA_GCGEN 10
292#define LUA_GCINC 11
293
294LUA_API int (lua_gc) (lua_State *L, int what, int data);
295
296
297/*
298** miscellaneous functions
299*/
300
301LUA_API int (lua_error) (lua_State *L);
302
303LUA_API int (lua_next) (lua_State *L, int idx);
304
305LUA_API void (lua_concat) (lua_State *L, int n);
306LUA_API void (lua_len) (lua_State *L, int idx);
307
308LUA_API lua_Alloc (lua_getallocf) (lua_State *L, void **ud);
309LUA_API void (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud);
310
311
312
313/*
314** ===============================================================
315** some useful macros
316** ===============================================================
317*/
318
319#define lua_tonumber(L,i) lua_tonumberx(L,i,NULL)
320#define lua_tointeger(L,i) lua_tointegerx(L,i,NULL)
321#define lua_tounsigned(L,i) lua_tounsignedx(L,i,NULL)
322
323#define lua_pop(L,n) lua_settop(L, -(n)-1)
324
325#define lua_newtable(L) lua_createtable(L, 0, 0)
326
327#define lua_register(L,n,f) (lua_pushcfunction(L, (f)), lua_setglobal(L, (n)))
328
329#define lua_pushcfunction(L,f) lua_pushcclosure(L, (f), 0)
330
331#define lua_isfunction(L,n) (lua_type(L, (n)) == LUA_TFUNCTION)
332#define lua_istable(L,n) (lua_type(L, (n)) == LUA_TTABLE)
333#define lua_islightuserdata(L,n) (lua_type(L, (n)) == LUA_TLIGHTUSERDATA)
334#define lua_isnil(L,n) (lua_type(L, (n)) == LUA_TNIL)
335#define lua_isboolean(L,n) (lua_type(L, (n)) == LUA_TBOOLEAN)
336#define lua_isthread(L,n) (lua_type(L, (n)) == LUA_TTHREAD)
337#define lua_isnone(L,n) (lua_type(L, (n)) == LUA_TNONE)
338#define lua_isnoneornil(L, n) (lua_type(L, (n)) <= 0)
339
340#define lua_pushliteral(L, s) \
341 lua_pushlstring(L, "" s, (sizeof(s)/sizeof(char))-1)
342
343#define lua_pushglobaltable(L) \
344 lua_rawgeti(L, LUA_REGISTRYINDEX, LUA_RIDX_GLOBALS)
345
346#define lua_tostring(L,i) lua_tolstring(L, (i), NULL)
347
348
349
350/*
351** {======================================================================
352** Debug API
353** =======================================================================
354*/
355
356
357/*
358** Event codes
359*/
360#define LUA_HOOKCALL 0
361#define LUA_HOOKRET 1
362#define LUA_HOOKLINE 2
363#define LUA_HOOKCOUNT 3
364#define LUA_HOOKTAILCALL 4
365
366
367/*
368** Event masks
369*/
370#define LUA_MASKCALL (1 << LUA_HOOKCALL)
371#define LUA_MASKRET (1 << LUA_HOOKRET)
372#define LUA_MASKLINE (1 << LUA_HOOKLINE)
373#define LUA_MASKCOUNT (1 << LUA_HOOKCOUNT)
374
375typedef struct lua_Debug lua_Debug; /* activation record */
376
377
378/* Functions to be called by the debugger in specific events */
379typedef void (*lua_Hook) (lua_State *L, lua_Debug *ar);
380
381
382LUA_API int (lua_getstack) (lua_State *L, int level, lua_Debug *ar);
383LUA_API int (lua_getinfo) (lua_State *L, const char *what, lua_Debug *ar);
384LUA_API const char *(lua_getlocal) (lua_State *L, const lua_Debug *ar, int n);
385LUA_API const char *(lua_setlocal) (lua_State *L, const lua_Debug *ar, int n);
386LUA_API const char *(lua_getupvalue) (lua_State *L, int funcindex, int n);
387LUA_API const char *(lua_setupvalue) (lua_State *L, int funcindex, int n);
388
389LUA_API void *(lua_upvalueid) (lua_State *L, int fidx, int n);
390LUA_API void (lua_upvaluejoin) (lua_State *L, int fidx1, int n1,
391 int fidx2, int n2);
392
393LUA_API int (lua_sethook) (lua_State *L, lua_Hook func, int mask, int count);
394LUA_API lua_Hook (lua_gethook) (lua_State *L);
395LUA_API int (lua_gethookmask) (lua_State *L);
396LUA_API int (lua_gethookcount) (lua_State *L);
397
398
399struct lua_Debug {
400 int event;
401 const char *name; /* (n) */
402 const char *namewhat; /* (n) 'global', 'local', 'field', 'method' */
403 const char *what; /* (S) 'Lua', 'C', 'main', 'tail' */
404 const char *source; /* (S) */
405 int currentline; /* (l) */
406 int linedefined; /* (S) */
407 int lastlinedefined; /* (S) */
408 unsigned char nups; /* (u) number of upvalues */
409 unsigned char nparams;/* (u) number of parameters */
410 char isvararg; /* (u) */
411 char istailcall; /* (t) */
412 char short_src[LUA_IDSIZE]; /* (S) */
413 /* private part */
414 struct CallInfo *i_ci; /* active function */
415};
416
417/* }====================================================================== */
418
419
420/******************************************************************************
421* Copyright (C) 1994-2013 Lua.org, PUC-Rio.
422*
423* Permission is hereby granted, free of charge, to any person obtaining
424* a copy of this software and associated documentation files (the
425* "Software"), to deal in the Software without restriction, including
426* without limitation the rights to use, copy, modify, merge, publish,
427* distribute, sublicense, and/or sell copies of the Software, and to
428* permit persons to whom the Software is furnished to do so, subject to
429* the following conditions:
430*
431* The above copyright notice and this permission notice shall be
432* included in all copies or substantial portions of the Software.
433*
434* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
435* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
436* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
437* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
438* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
439* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
440* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
441******************************************************************************/
442
443
444#endif
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