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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 */

8 #ifndef lconfig_h

9 #define lconfig_h

11 #include <limits.h>

12 #include <stddef.h>

15 /*

16 ** ==================================================================

17 ** Search for "@@" to find all configurable definitions.

18 ** ===================================================================

19 */

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

32 #if !defined(LUA_ANSI) && defined(_WIN32) && !defined(_WIN32_WCE)

33 #define LUA_WIN /* enable goodies for regular Windows platforms */

34 #endif

36 #if defined(LUA_WIN)

37 #define LUA_DL_DLL

38 #define LUA_USE_AFORMAT /* assume 'printf' handles 'aA' specifiers */

39 #endif

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

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

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

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 */

 #define LUA_LDIR        "!\\lua\\"

 #define LUA_CDIR        "!\\"

94 #define LUA_PATH_DEFAULT \

                 LUA_LDIR"?.lua;"  LUA_LDIR"?\\init.lua;" \

                 LUA_CDIR"?.lua;"  LUA_CDIR"?\\init.lua;" ".\\?.lua"

97 #define LUA_CPATH_DEFAULT \

                 LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll;" ".\\?.dll"

100 #else /* }{ */

101

 #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 \

                 LUA_LDIR"?.lua;"  LUA_LDIR"?/init.lua;" \

                 LUA_CDIR"?.lua;"  LUA_CDIR"?/init.lua;" "./?.lua"

109 #define LUA_CPATH_DEFAULT \

                 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)

 #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 */

 #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)

 #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)

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

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 /* }================================================================== */

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 */

550 #endif