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1 /*
2 ** $Id: luaconf.h,v 1.176 2013/03/16 21:10:18 roberto Exp $
3 ** Configuration file for Lua
4 ** See Copyright Notice in lua.h
5 */
6
7
8 #ifndef lconfig_h
9 #define lconfig_h
10
11 #include <limits.h>
12 #include <stddef.h>
13
14
15 /*
16 ** ==================================================================
17 ** Search for "@@" to find all configurable definitions.
18 ** ===================================================================
19 */
20
21
22 /*
23 @@ LUA_ANSI controls the use of non-ansi features.
24 ** CHANGE it (define it) if you want Lua to avoid the use of any
25 ** non-ansi feature or library.
26 */
27 #if !defined(LUA_ANSI) && defined(__STRICT_ANSI__)
28 #define LUA_ANSI
29 #endif
30
31
32 #if !defined(LUA_ANSI) && defined(_WIN32) && !defined(_WIN32_WCE)
33 #define LUA_WIN /* enable goodies for regular Windows platforms */
34 #endif
35
36 #if defined(LUA_WIN)
37 #define LUA_DL_DLL
38 #define LUA_USE_AFORMAT /* assume 'printf' handles 'aA' specifiers */
39 #endif
40
41
42
43 #if defined(LUA_USE_LINUX)
44 #define LUA_USE_POSIX
45 #define LUA_USE_DLOPEN /* needs an extra library: -ldl */
46 #define LUA_USE_READLINE /* needs some extra libraries */
47 #define LUA_USE_STRTODHEX /* assume 'strtod' handles hex formats */
48 #define LUA_USE_AFORMAT /* assume 'printf' handles 'aA' specifiers */
49 #define LUA_USE_LONGLONG /* assume support for long long */
50 #endif
51
52 #if defined(LUA_USE_MACOSX)
53 #define LUA_USE_POSIX
54 #define LUA_USE_DLOPEN /* does not need -ldl */
55 #define LUA_USE_READLINE /* needs an extra library: -lreadline */
56 #define LUA_USE_STRTODHEX /* assume 'strtod' handles hex formats */
57 #define LUA_USE_AFORMAT /* assume 'printf' handles 'aA' specifiers */
58 #define LUA_USE_LONGLONG /* assume support for long long */
59 #endif
60
61
62
63 /*
64 @@ LUA_USE_POSIX includes all functionality listed as X/Open System
65 @* Interfaces Extension (XSI).
66 ** CHANGE it (define it) if your system is XSI compatible.
67 */
68 #if defined(LUA_USE_POSIX)
69 #define LUA_USE_MKSTEMP
70 #define LUA_USE_ISATTY
71 #define LUA_USE_POPEN
72 #define LUA_USE_ULONGJMP
73 #define LUA_USE_GMTIME_R
74 #endif
75
76
77
78 /*
79 @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
80 @* Lua libraries.
81 @@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for
82 @* C libraries.
83 ** CHANGE them if your machine has a non-conventional directory
84 ** hierarchy or if you want to install your libraries in
85 ** non-conventional directories.
86 */
87 #if defined(_WIN32) /* { */
88 /*
89 ** In Windows, any exclamation mark ('!') in the path is replaced by the
90 ** path of the directory of the executable file of the current process.
91 */
92 #define LUA_LDIR "!\\lua\\"
93 #define LUA_CDIR "!\\"
94 #define LUA_PATH_DEFAULT \
95 LUA_LDIR"?.lua;" LUA_LDIR"?\\init.lua;" \
96 LUA_CDIR"?.lua;" LUA_CDIR"?\\init.lua;" ".\\?.lua"
97 #define LUA_CPATH_DEFAULT \
98 LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll;" ".\\?.dll"
99
100 #else /* }{ */
101
102 #define LUA_VDIR LUA_VERSION_MAJOR "." LUA_VERSION_MINOR "/"
103 #define LUA_ROOT "/usr/local/"
104 #define LUA_LDIR LUA_ROOT "share/lua/" LUA_VDIR
105 #define LUA_CDIR LUA_ROOT "lib/lua/" LUA_VDIR
106 #define LUA_PATH_DEFAULT \
107 LUA_LDIR"?.lua;" LUA_LDIR"?/init.lua;" \
108 LUA_CDIR"?.lua;" LUA_CDIR"?/init.lua;" "./?.lua"
109 #define LUA_CPATH_DEFAULT \
110 LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" "./?.so"
111 #endif /* } */
112
113
114 /*
115 @@ LUA_DIRSEP is the directory separator (for submodules).
116 ** CHANGE it if your machine does not use "/" as the directory separator
117 ** and is not Windows. (On Windows Lua automatically uses "\".)
118 */
119 #if defined(_WIN32)
120 #define LUA_DIRSEP "\\"
121 #else
122 #define LUA_DIRSEP "/"
123 #endif
124
125
126 /*
127 @@ LUA_ENV is the name of the variable that holds the current
128 @@ environment, used to access global names.
129 ** CHANGE it if you do not like this name.
130 */
131 #define LUA_ENV "_ENV"
132
133
134 /*
135 @@ LUA_API is a mark for all core API functions.
136 @@ LUALIB_API is a mark for all auxiliary library functions.
137 @@ LUAMOD_API is a mark for all standard library opening functions.
138 ** CHANGE them if you need to define those functions in some special way.
139 ** For instance, if you want to create one Windows DLL with the core and
140 ** the libraries, you may want to use the following definition (define
141 ** LUA_BUILD_AS_DLL to get it).
142 */
143 #if defined(LUA_BUILD_AS_DLL) /* { */
144
145 #if defined(LUA_CORE) || defined(LUA_LIB) /* { */
146 #define LUA_API __declspec(dllexport)
147 #else /* }{ */
148 #define LUA_API __declspec(dllimport)
149 #endif /* } */
150
151 #else /* }{ */
152
153 #define LUA_API extern
154
155 #endif /* } */
156
157
158 /* more often than not the libs go together with the core */
159 #define LUALIB_API LUA_API
160 #define LUAMOD_API LUALIB_API
161
162
163 /*
164 @@ LUAI_FUNC is a mark for all extern functions that are not to be
165 @* exported to outside modules.
166 @@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables
167 @* that are not to be exported to outside modules (LUAI_DDEF for
168 @* definitions and LUAI_DDEC for declarations).
169 ** CHANGE them if you need to mark them in some special way. Elf/gcc
170 ** (versions 3.2 and later) mark them as "hidden" to optimize access
171 ** when Lua is compiled as a shared library. Not all elf targets support
172 ** this attribute. Unfortunately, gcc does not offer a way to check
173 ** whether the target offers that support, and those without support
174 ** give a warning about it. To avoid these warnings, change to the
175 ** default definition.
176 */
177 #if defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
178 defined(__ELF__) /* { */
179 #define LUAI_FUNC __attribute__((visibility("hidden"))) extern
180 #define LUAI_DDEC LUAI_FUNC
181 #define LUAI_DDEF /* empty */
182
183 #else /* }{ */
184 #define LUAI_FUNC extern
185 #define LUAI_DDEC extern
186 #define LUAI_DDEF /* empty */
187 #endif /* } */
188
189
190
191 /*
192 @@ LUA_QL describes how error messages quote program elements.
193 ** CHANGE it if you want a different appearance.
194 */
195 #define LUA_QL(x) "'" x "'"
196 #define LUA_QS LUA_QL("%s")
197
198
199 /*
200 @@ LUA_IDSIZE gives the maximum size for the description of the source
201 @* of a function in debug information.
202 ** CHANGE it if you want a different size.
203 */
204 #define LUA_IDSIZE 60
205
206
207 /*
208 @@ luai_writestring/luai_writeline define how 'print' prints its results.
209 ** They are only used in libraries and the stand-alone program. (The #if
210 ** avoids including 'stdio.h' everywhere.)
211 */
212 #if defined(LUA_LIB) || defined(lua_c)
213 #include <stdio.h>
214 #define luai_writestring(s,l) fwrite((s), sizeof(char), (l), stdout)
215 #define luai_writeline() (luai_writestring("\n", 1), fflush(stdout))
216 #endif
217
218 /*
219 @@ luai_writestringerror defines how to print error messages.
220 ** (A format string with one argument is enough for Lua...)
221 */
222 #define luai_writestringerror(s,p) \
223 (fprintf(stderr, (s), (p)), fflush(stderr))
224
225
226 /*
227 @@ LUAI_MAXSHORTLEN is the maximum length for short strings, that is,
228 ** strings that are internalized. (Cannot be smaller than reserved words
229 ** or tags for metamethods, as these strings must be internalized;
230 ** #("function") = 8, #("__newindex") = 10.)
231 */
232 #define LUAI_MAXSHORTLEN 40
233
234
235
236 /*
237 ** {==================================================================
238 ** Compatibility with previous versions
239 ** ===================================================================
240 */
241
242 /*
243 @@ LUA_COMPAT_ALL controls all compatibility options.
244 ** You can define it to get all options, or change specific options
245 ** to fit your specific needs.
246 */
247 #if defined(LUA_COMPAT_ALL) /* { */
248
249 /*
250 @@ LUA_COMPAT_UNPACK controls the presence of global 'unpack'.
251 ** You can replace it with 'table.unpack'.
252 */
253 #define LUA_COMPAT_UNPACK
254
255 /*
256 @@ LUA_COMPAT_LOADERS controls the presence of table 'package.loaders'.
257 ** You can replace it with 'package.searchers'.
258 */
259 #define LUA_COMPAT_LOADERS
260
261 /*
262 @@ macro 'lua_cpcall' emulates deprecated function lua_cpcall.
263 ** You can call your C function directly (with light C functions).
264 */
265 #define lua_cpcall(L,f,u) \
266 (lua_pushcfunction(L, (f)), \
267 lua_pushlightuserdata(L,(u)), \
268 lua_pcall(L,1,0,0))
269
270
271 /*
272 @@ LUA_COMPAT_LOG10 defines the function 'log10' in the math library.
273 ** You can rewrite 'log10(x)' as 'log(x, 10)'.
274 */
275 #define LUA_COMPAT_LOG10
276
277 /*
278 @@ LUA_COMPAT_LOADSTRING defines the function 'loadstring' in the base
279 ** library. You can rewrite 'loadstring(s)' as 'load(s)'.
280 */
281 #define LUA_COMPAT_LOADSTRING
282
283 /*
284 @@ LUA_COMPAT_MAXN defines the function 'maxn' in the table library.
285 */
286 #define LUA_COMPAT_MAXN
287
288 /*
289 @@ The following macros supply trivial compatibility for some
290 ** changes in the API. The macros themselves document how to
291 ** change your code to avoid using them.
292 */
293 #define lua_strlen(L,i) lua_rawlen(L, (i))
294
295 #define lua_objlen(L,i) lua_rawlen(L, (i))
296
297 #define lua_equal(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPEQ)
298 #define lua_lessthan(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPLT)
299
300 /*
301 @@ LUA_COMPAT_MODULE controls compatibility with previous
302 ** module functions 'module' (Lua) and 'luaL_register' (C).
303 */
304 #define LUA_COMPAT_MODULE
305
306 #endif /* } */
307
308 /* }================================================================== */
309
310
311
312 /*
313 @@ LUAI_BITSINT defines the number of bits in an int.
314 ** CHANGE here if Lua cannot automatically detect the number of bits of
315 ** your machine. Probably you do not need to change this.
316 */
317 /* avoid overflows in comparison */
318 #if INT_MAX-20 < 32760 /* { */
319 #define LUAI_BITSINT 16
320 #elif INT_MAX > 2147483640L /* }{ */
321 /* int has at least 32 bits */
322 #define LUAI_BITSINT 32
323 #else /* }{ */
324 #error "you must define LUA_BITSINT with number of bits in an integer"
325 #endif /* } */
326
327
328 /*
329 @@ LUA_INT32 is an signed integer with exactly 32 bits.
330 @@ LUAI_UMEM is an unsigned integer big enough to count the total
331 @* memory used by Lua.
332 @@ LUAI_MEM is a signed integer big enough to count the total memory
333 @* used by Lua.
334 ** CHANGE here if for some weird reason the default definitions are not
335 ** good enough for your machine. Probably you do not need to change
336 ** this.
337 */
338 #if LUAI_BITSINT >= 32 /* { */
339 #define LUA_INT32 int
340 #define LUAI_UMEM size_t
341 #define LUAI_MEM ptrdiff_t
342 #else /* }{ */
343 /* 16-bit ints */
344 #define LUA_INT32 long
345 #define LUAI_UMEM unsigned long
346 #define LUAI_MEM long
347 #endif /* } */
348
349
350 /*
351 @@ LUAI_MAXSTACK limits the size of the Lua stack.
352 ** CHANGE it if you need a different limit. This limit is arbitrary;
353 ** its only purpose is to stop Lua to consume unlimited stack
354 ** space (and to reserve some numbers for pseudo-indices).
355 */
356 #if LUAI_BITSINT >= 32
357 #define LUAI_MAXSTACK 1000000
358 #else
359 #define LUAI_MAXSTACK 15000
360 #endif
361
362 /* reserve some space for error handling */
363 #define LUAI_FIRSTPSEUDOIDX (-LUAI_MAXSTACK - 1000)
364
365
366
367
368 /*
369 @@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
370 ** CHANGE it if it uses too much C-stack space.
371 */
372 #define LUAL_BUFFERSIZE BUFSIZ
373
374
375
376
377 /*
378 ** {==================================================================
379 @@ LUA_NUMBER is the type of numbers in Lua.
380 ** CHANGE the following definitions only if you want to build Lua
381 ** with a number type different from double. You may also need to
382 ** change lua_number2int & lua_number2integer.
383 ** ===================================================================
384 */
385
386 #define LUA_NUMBER_DOUBLE
387 #define LUA_NUMBER double
388
389 /*
390 @@ LUAI_UACNUMBER is the result of an 'usual argument conversion'
391 @* over a number.
392 */
393 #define LUAI_UACNUMBER double
394
395
396 /*
397 @@ LUA_NUMBER_SCAN is the format for reading numbers.
398 @@ LUA_NUMBER_FMT is the format for writing numbers.
399 @@ lua_number2str converts a number to a string.
400 @@ LUAI_MAXNUMBER2STR is maximum size of previous conversion.
401 */
402 #define LUA_NUMBER_SCAN "%lf"
403 #define LUA_NUMBER_FMT "%.14g"
404 #define lua_number2str(s,n) sprintf((s), LUA_NUMBER_FMT, (n))
405 #define LUAI_MAXNUMBER2STR 32 /* 16 digits, sign, point, and \0 */
406
407
408 /*
409 @@ l_mathop allows the addition of an 'l' or 'f' to all math operations
410 */
411 #define l_mathop(x) (x)
412
413
414 /*
415 @@ lua_str2number converts a decimal numeric string to a number.
416 @@ lua_strx2number converts an hexadecimal numeric string to a number.
417 ** In C99, 'strtod' does both conversions. C89, however, has no function
418 ** to convert floating hexadecimal strings to numbers. For these
419 ** systems, you can leave 'lua_strx2number' undefined and Lua will
420 ** provide its own implementation.
421 */
422 #define lua_str2number(s,p) strtod((s), (p))
423
424 #if defined(LUA_USE_STRTODHEX)
425 #define lua_strx2number(s,p) strtod((s), (p))
426 #endif
427
428
429 /*
430 @@ The luai_num* macros define the primitive operations over numbers.
431 */
432
433 /* the following operations need the math library */
434 #if defined(lobject_c) || defined(lvm_c)
435 #include <math.h>
436 #define luai_nummod(L,a,b) ((a) - l_mathop(floor)((a)/(b))*(b))
437 #define luai_numpow(L,a,b) (l_mathop(pow)(a,b))
438 #endif
439
440 /* these are quite standard operations */
441 #if defined(LUA_CORE)
442 #define luai_numadd(L,a,b) ((a)+(b))
443 #define luai_numsub(L,a,b) ((a)-(b))
444 #define luai_nummul(L,a,b) ((a)*(b))
445 #define luai_numdiv(L,a,b) ((a)/(b))
446 #define luai_numunm(L,a) (-(a))
447 #define luai_numeq(a,b) ((a)==(b))
448 #define luai_numlt(L,a,b) ((a)<(b))
449 #define luai_numle(L,a,b) ((a)<=(b))
450 #define luai_numisnan(L,a) (!luai_numeq((a), (a)))
451 #endif
452
453
454
455 /*
456 @@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger.
457 ** CHANGE that if ptrdiff_t is not adequate on your machine. (On most
458 ** machines, ptrdiff_t gives a good choice between int or long.)
459 */
460 #define LUA_INTEGER ptrdiff_t
461
462 /*
463 @@ LUA_UNSIGNED is the integral type used by lua_pushunsigned/lua_tounsigned.
464 ** It must have at least 32 bits.
465 */
466 #define LUA_UNSIGNED unsigned LUA_INT32
467
468
469
470 /*
471 ** Some tricks with doubles
472 */
473
474 #if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) /* { */
475 /*
476 ** The next definitions activate some tricks to speed up the
477 ** conversion from doubles to integer types, mainly to LUA_UNSIGNED.
478 **
479 @@ LUA_MSASMTRICK uses Microsoft assembler to avoid clashes with a
480 ** DirectX idiosyncrasy.
481 **
482 @@ LUA_IEEE754TRICK uses a trick that should work on any machine
483 ** using IEEE754 with a 32-bit integer type.
484 **
485 @@ LUA_IEEELL extends the trick to LUA_INTEGER; should only be
486 ** defined when LUA_INTEGER is a 32-bit integer.
487 **
488 @@ LUA_IEEEENDIAN is the endianness of doubles in your machine
489 ** (0 for little endian, 1 for big endian); if not defined, Lua will
490 ** check it dynamically for LUA_IEEE754TRICK (but not for LUA_NANTRICK).
491 **
492 @@ LUA_NANTRICK controls the use of a trick to pack all types into
493 ** a single double value, using NaN values to represent non-number
494 ** values. The trick only works on 32-bit machines (ints and pointers
495 ** are 32-bit values) with numbers represented as IEEE 754-2008 doubles
496 ** with conventional endianess (12345678 or 87654321), in CPUs that do
497 ** not produce signaling NaN values (all NaNs are quiet).
498 */
499
500 /* Microsoft compiler on a Pentium (32 bit) ? */
501 #if defined(LUA_WIN) && defined(_MSC_VER) && defined(_M_IX86) /* { */
502
503 #define LUA_MSASMTRICK
504 #define LUA_IEEEENDIAN 0
505 #define LUA_NANTRICK
506
507
508 /* pentium 32 bits? */
509 #elif defined(__i386__) || defined(__i386) || defined(__X86__) /* }{ */
510
511 #define LUA_IEEE754TRICK
512 #define LUA_IEEELL
513 #define LUA_IEEEENDIAN 0
514 #define LUA_NANTRICK
515
516 /* pentium 64 bits? */
517 #elif defined(__x86_64) /* }{ */
518
519 #define LUA_IEEE754TRICK
520 #define LUA_IEEEENDIAN 0
521
522 #elif defined(__POWERPC__) || defined(__ppc__) /* }{ */
523
524 #define LUA_IEEE754TRICK
525 #define LUA_IEEEENDIAN 1
526
527 #else /* }{ */
528
529 /* assume IEEE754 and a 32-bit integer type */
530 #define LUA_IEEE754TRICK
531
532 #endif /* } */
533
534 #endif /* } */
535
536 /* }================================================================== */
537
538
539
540
541 /* =================================================================== */
542
543 /*
544 ** Local configuration. You can use this space to add your redefinitions
545 ** without modifying the main part of the file.
546 */
547
548
549
550 #endif
551
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