1 /* 2 ** $Id: luaconf.h,v 1.176.1.1 2013/04/12 18:48:47 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 #elif defined(SYSLINUX) 101 /* Extensions for converting the Syslinux path into package load paths */ 102 #define LUA_PATH_DEFAULT ".lua" 103 #define LUA_CPATH_DEFAULT ".c32" 104 #else /* }{ */ 105 106 #define LUA_VDIR LUA_VERSION_MAJOR "." LUA_VERSION_MINOR "/" 107 #define LUA_ROOT "/usr/local/" 108 #define LUA_LDIR LUA_ROOT "share/lua/" LUA_VDIR 109 #define LUA_CDIR LUA_ROOT "lib/lua/" LUA_VDIR 110 #define LUA_PATH_DEFAULT \ 111 LUA_LDIR"?.lua;" LUA_LDIR"?/init.lua;" \ 112 LUA_CDIR"?.lua;" LUA_CDIR"?/init.lua;" "./?.lua" 113 #define LUA_CPATH_DEFAULT \ 114 LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" "./?.so" 115 #endif /* } */ 116 117 118 /* 119 @@ LUA_DIRSEP is the directory separator (for submodules). 120 ** CHANGE it if your machine does not use "/" as the directory separator 121 ** and is not Windows. (On Windows Lua automatically uses "\".) 122 */ 123 #if defined(_WIN32) 124 #define LUA_DIRSEP "\\" 125 #else 126 #define LUA_DIRSEP "/" 127 #endif 128 129 130 /* 131 @@ LUA_ENV is the name of the variable that holds the current 132 @@ environment, used to access global names. 133 ** CHANGE it if you do not like this name. 134 */ 135 #define LUA_ENV "_ENV" 136 137 138 /* 139 @@ LUA_API is a mark for all core API functions. 140 @@ LUALIB_API is a mark for all auxiliary library functions. 141 @@ LUAMOD_API is a mark for all standard library opening functions. 142 ** CHANGE them if you need to define those functions in some special way. 143 ** For instance, if you want to create one Windows DLL with the core and 144 ** the libraries, you may want to use the following definition (define 145 ** LUA_BUILD_AS_DLL to get it). 146 */ 147 #if defined(LUA_BUILD_AS_DLL) /* { */ 148 149 #if defined(LUA_CORE) || defined(LUA_LIB) /* { */ 150 #define LUA_API __declspec(dllexport) 151 #else /* }{ */ 152 #define LUA_API __declspec(dllimport) 153 #endif /* } */ 154 155 #else /* }{ */ 156 157 #define LUA_API extern 158 159 #endif /* } */ 160 161 162 /* more often than not the libs go together with the core */ 163 #define LUALIB_API LUA_API 164 #define LUAMOD_API LUALIB_API 165 166 167 /* 168 @@ LUAI_FUNC is a mark for all extern functions that are not to be 169 @* exported to outside modules. 170 @@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables 171 @* that are not to be exported to outside modules (LUAI_DDEF for 172 @* definitions and LUAI_DDEC for declarations). 173 ** CHANGE them if you need to mark them in some special way. Elf/gcc 174 ** (versions 3.2 and later) mark them as "hidden" to optimize access 175 ** when Lua is compiled as a shared library. Not all elf targets support 176 ** this attribute. Unfortunately, gcc does not offer a way to check 177 ** whether the target offers that support, and those without support 178 ** give a warning about it. To avoid these warnings, change to the 179 ** default definition. 180 */ 181 #if defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \ 182 defined(__ELF__) /* { */ 183 #define LUAI_FUNC __attribute__((visibility("hidden"))) extern 184 #define LUAI_DDEC LUAI_FUNC 185 #define LUAI_DDEF /* empty */ 186 187 #else /* }{ */ 188 #define LUAI_FUNC extern 189 #define LUAI_DDEC extern 190 #define LUAI_DDEF /* empty */ 191 #endif /* } */ 192 193 194 195 /* 196 @@ LUA_QL describes how error messages quote program elements. 197 ** CHANGE it if you want a different appearance. 198 */ 199 #define LUA_QL(x) "'" x "'" 200 #define LUA_QS LUA_QL("%s") 201 202 203 /* 204 @@ LUA_IDSIZE gives the maximum size for the description of the source 205 @* of a function in debug information. 206 ** CHANGE it if you want a different size. 207 */ 208 #define LUA_IDSIZE 60 209 210 211 /* 212 @@ luai_writestring/luai_writeline define how 'print' prints its results. 213 ** They are only used in libraries and the stand-alone program. (The #if 214 ** avoids including 'stdio.h' everywhere.) 215 */ 216 #if defined(LUA_LIB) || defined(lua_c) 217 #include <stdio.h> 218 #define luai_writestring(s,l) fwrite((s), sizeof(char), (l), stdout) 219 #define luai_writeline() (luai_writestring("\n", 1), fflush(stdout)) 220 #endif 221 222 /* 223 @@ luai_writestringerror defines how to print error messages. 224 ** (A format string with one argument is enough for Lua...) 225 */ 226 #define luai_writestringerror(s,p) \ 227 (fprintf(stderr, (s), (p)), fflush(stderr)) 228 229 230 /* 231 @@ LUAI_MAXSHORTLEN is the maximum length for short strings, that is, 232 ** strings that are internalized. (Cannot be smaller than reserved words 233 ** or tags for metamethods, as these strings must be internalized; 234 ** #("function") = 8, #("__newindex") = 10.) 235 */ 236 #define LUAI_MAXSHORTLEN 40 237 238 239 240 /* 241 ** {================================================================== 242 ** Compatibility with previous versions 243 ** =================================================================== 244 */ 245 246 /* 247 @@ LUA_COMPAT_ALL controls all compatibility options. 248 ** You can define it to get all options, or change specific options 249 ** to fit your specific needs. 250 */ 251 #if defined(LUA_COMPAT_ALL) /* { */ 252 253 /* 254 @@ LUA_COMPAT_UNPACK controls the presence of global 'unpack'. 255 ** You can replace it with 'table.unpack'. 256 */ 257 #define LUA_COMPAT_UNPACK 258 259 /* 260 @@ LUA_COMPAT_LOADERS controls the presence of table 'package.loaders'. 261 ** You can replace it with 'package.searchers'. 262 */ 263 #define LUA_COMPAT_LOADERS 264 265 /* 266 @@ macro 'lua_cpcall' emulates deprecated function lua_cpcall. 267 ** You can call your C function directly (with light C functions). 268 */ 269 #define lua_cpcall(L,f,u) \ 270 (lua_pushcfunction(L, (f)), \ 271 lua_pushlightuserdata(L,(u)), \ 272 lua_pcall(L,1,0,0)) 273 274 275 /* 276 @@ LUA_COMPAT_LOG10 defines the function 'log10' in the math library. 277 ** You can rewrite 'log10(x)' as 'log(x, 10)'. 278 */ 279 #define LUA_COMPAT_LOG10 280 281 /* 282 @@ LUA_COMPAT_LOADSTRING defines the function 'loadstring' in the base 283 ** library. You can rewrite 'loadstring(s)' as 'load(s)'. 284 */ 285 #define LUA_COMPAT_LOADSTRING 286 287 /* 288 @@ LUA_COMPAT_MAXN defines the function 'maxn' in the table library. 289 */ 290 #define LUA_COMPAT_MAXN 291 292 /* 293 @@ The following macros supply trivial compatibility for some 294 ** changes in the API. The macros themselves document how to 295 ** change your code to avoid using them. 296 */ 297 #define lua_strlen(L,i) lua_rawlen(L, (i)) 298 299 #define lua_objlen(L,i) lua_rawlen(L, (i)) 300 301 #define lua_equal(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPEQ) 302 #define lua_lessthan(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPLT) 303 304 /* 305 @@ LUA_COMPAT_MODULE controls compatibility with previous 306 ** module functions 'module' (Lua) and 'luaL_register' (C). 307 */ 308 #define LUA_COMPAT_MODULE 309 310 #endif /* } */ 311 312 /* }================================================================== */ 313 314 315 316 /* 317 @@ LUAI_BITSINT defines the number of bits in an int. 318 ** CHANGE here if Lua cannot automatically detect the number of bits of 319 ** your machine. Probably you do not need to change this. 320 */ 321 /* avoid overflows in comparison */ 322 #if INT_MAX-20 < 32760 /* { */ 323 #define LUAI_BITSINT 16 324 #elif INT_MAX > 2147483640L /* }{ */ 325 /* int has at least 32 bits */ 326 #define LUAI_BITSINT 32 327 #else /* }{ */ 328 #error "you must define LUA_BITSINT with number of bits in an integer" 329 #endif /* } */ 330 331 332 /* 333 @@ LUA_INT32 is an signed integer with exactly 32 bits. 334 @@ LUAI_UMEM is an unsigned integer big enough to count the total 335 @* memory used by Lua. 336 @@ LUAI_MEM is a signed integer big enough to count the total memory 337 @* used by Lua. 338 ** CHANGE here if for some weird reason the default definitions are not 339 ** good enough for your machine. Probably you do not need to change 340 ** this. 341 */ 342 #if LUAI_BITSINT >= 32 /* { */ 343 #define LUA_INT32 int 344 #define LUAI_UMEM size_t 345 #define LUAI_MEM ptrdiff_t 346 #else /* }{ */ 347 /* 16-bit ints */ 348 #define LUA_INT32 long 349 #define LUAI_UMEM unsigned long 350 #define LUAI_MEM long 351 #endif /* } */ 352 353 354 /* 355 @@ LUAI_MAXSTACK limits the size of the Lua stack. 356 ** CHANGE it if you need a different limit. This limit is arbitrary; 357 ** its only purpose is to stop Lua to consume unlimited stack 358 ** space (and to reserve some numbers for pseudo-indices). 359 */ 360 #if LUAI_BITSINT >= 32 361 #define LUAI_MAXSTACK 1000000 362 #else 363 #define LUAI_MAXSTACK 15000 364 #endif 365 366 /* reserve some space for error handling */ 367 #define LUAI_FIRSTPSEUDOIDX (-LUAI_MAXSTACK - 1000) 368 369 370 371 372 /* 373 @@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system. 374 ** CHANGE it if it uses too much C-stack space. 375 */ 376 #define LUAL_BUFFERSIZE BUFSIZ 377 378 379 380 381 /* 382 ** {================================================================== 383 @@ LUA_NUMBER is the type of numbers in Lua. 384 ** CHANGE the following definitions only if you want to build Lua 385 ** with a number type different from double. You may also need to 386 ** change lua_number2int & lua_number2integer. 387 ** =================================================================== 388 */ 389 390 /* Define LUA_NUMBER_INTEGRAL to produce a system that uses no 391 floating point operations by changing the type of Lua numbers from 392 double to long. It implements division and modulus so that 393 394 x == (x / y) * y + x % y. 395 396 The exponentiation function returns zero for negative exponents. 397 Defining LUA_NUMBER_INTEGRAL also removes the difftime function, 398 and the math module should not be used. The string.format function 399 no longer handles the floating point directives %e, %E, %f, %g, and 400 %G. */ 401 402 #define LUA_NUMBER_INTEGRAL 403 #ifdef LUA_NUMBER_INTEGRAL 404 #define LUA_NUMBER long 405 #else 406 #define LUA_NUMBER_DOUBLE 407 #define LUA_NUMBER double 408 #endif 409 410 /* 411 @@ LUAI_UACNUMBER is the result of an 'usual argument conversion' 412 @* over a number. 413 */ 414 #define LUAI_UACNUMBER LUA_NUMBER 415 416 417 /* 418 @@ LUA_NUMBER_SCAN is the format for reading numbers. 419 @@ LUA_NUMBER_FMT is the format for writing numbers. 420 @@ lua_number2str converts a number to a string. 421 @@ LUAI_MAXNUMBER2STR is maximum size of previous conversion. 422 */ 423 #ifdef LUA_NUMBER_INTEGRAL 424 #define LUA_NUMBER_SCAN "%ld" 425 #define LUA_NUMBER_FMT "%ld" 426 #else 427 #define LUA_NUMBER_SCAN "%lf" 428 #define LUA_NUMBER_FMT "%.14g" 429 #endif 430 #define lua_number2str(s,n) sprintf((s), LUA_NUMBER_FMT, (n)) 431 #define LUAI_MAXNUMBER2STR 32 /* 16 digits, sign, point, and \0 */ 432 433 434 /* 435 @@ l_mathop allows the addition of an 'l' or 'f' to all math operations 436 */ 437 #define l_mathop(x) (x) 438 439 440 /* 441 @@ lua_str2number converts a decimal numeric string to a number. 442 @@ lua_strx2number converts an hexadecimal numeric string to a number. 443 ** In C99, 'strtod' does both conversions. C89, however, has no function 444 ** to convert floating hexadecimal strings to numbers. For these 445 ** systems, you can leave 'lua_strx2number' undefined and Lua will 446 ** provide its own implementation. 447 */ 448 #ifdef LUA_NUMBER_INTEGRAL 449 #define lua_str2number(s,p) strtol((s), (p), 10) 450 #else 451 #define lua_str2number(s,p) strtod((s), (p)) 452 #endif 453 454 #ifdef SYSLINUX 455 #define lua_strx2number(s,p) strtol((s), (p), 16) 456 #endif 457 458 459 /* 460 @@ The luai_num* macros define the primitive operations over numbers. 461 */ 462 463 #ifndef LUA_NUMBER_INTEGRAL 464 /* the following operations need the math library */ 465 #if defined(lobject_c) || defined(lvm_c) 466 #include <math.h> 467 #define luai_nummod(L,a,b) ((a) - l_mathop(floor)((a)/(b))*(b)) 468 #define luai_numpow(L,a,b) (l_mathop(pow)(a,b)) 469 #endif 470 #endif 471 472 /* these are quite standard operations */ 473 #if defined(LUA_CORE) 474 #define luai_numadd(L,a,b) ((a)+(b)) 475 #define luai_numsub(L,a,b) ((a)-(b)) 476 #define luai_nummul(L,a,b) ((a)*(b)) 477 #ifdef LUA_NUMBER_INTEGRAL 478 #define luai_numdiv(L,a,b) \ 479 (-1/2? \ 480 (a)/(b): \ 481 (((a)<0)==((b)<0)||(a)%(b)==0? \ 482 (a)/(b): \ 483 (a)/(b)-1)) 484 #define luai_nummod(L,a,b) \ 485 (-1/2? \ 486 (a)%(b): \ 487 (((a)<0)==((b)<0)||(a)%(b)==0? \ 488 (a)%(b): \ 489 (a)%(b)+(b))) 490 #define luai_lnumdiv(L,a,b) \ 491 ((b)==0? \ 492 (luaG_runerror(L,"divide by zero"),0): \ 493 luai_numdiv(a,b)) 494 #define luai_lnummod(L,a,b) \ 495 ((b)==0? \ 496 (luaG_runerror(L,"modulo by zero"),0): \ 497 luai_nummod(a,b)) 498 LUA_NUMBER luai_ipow(void *L, LUA_NUMBER, LUA_NUMBER); 499 #define luai_numpow(L,a,b) (luai_ipow(L,a,b)) 500 #else 501 #define luai_numdiv(L,a,b) ((a)/(b)) 502 #endif 503 #define luai_numunm(L,a) (-(a)) 504 #define luai_numeq(a,b) ((a)==(b)) 505 #define luai_numlt(L,a,b) ((a)<(b)) 506 #define luai_numle(L,a,b) ((a)<=(b)) 507 #define luai_numisnan(L,a) (!luai_numeq((a), (a))) 508 #endif 509 510 511 512 /* 513 @@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger. 514 ** CHANGE that if ptrdiff_t is not adequate on your machine. (On most 515 ** machines, ptrdiff_t gives a good choice between int or long.) 516 */ 517 #define LUA_INTEGER long 518 /* Changed to long for use with integral Lua numbers. */ 519 520 /* 521 @@ LUA_UNSIGNED is the integral type used by lua_pushunsigned/lua_tounsigned. 522 ** It must have at least 32 bits. 523 */ 524 #define LUA_UNSIGNED unsigned LUA_INT32 525 526 527 528 /* 529 ** Some tricks with doubles 530 */ 531 532 #if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) /* { */ 533 /* 534 ** The next definitions activate some tricks to speed up the 535 ** conversion from doubles to integer types, mainly to LUA_UNSIGNED. 536 ** 537 @@ LUA_MSASMTRICK uses Microsoft assembler to avoid clashes with a 538 ** DirectX idiosyncrasy. 539 ** 540 @@ LUA_IEEE754TRICK uses a trick that should work on any machine 541 ** using IEEE754 with a 32-bit integer type. 542 ** 543 @@ LUA_IEEELL extends the trick to LUA_INTEGER; should only be 544 ** defined when LUA_INTEGER is a 32-bit integer. 545 ** 546 @@ LUA_IEEEENDIAN is the endianness of doubles in your machine 547 ** (0 for little endian, 1 for big endian); if not defined, Lua will 548 ** check it dynamically for LUA_IEEE754TRICK (but not for LUA_NANTRICK). 549 ** 550 @@ LUA_NANTRICK controls the use of a trick to pack all types into 551 ** a single double value, using NaN values to represent non-number 552 ** values. The trick only works on 32-bit machines (ints and pointers 553 ** are 32-bit values) with numbers represented as IEEE 754-2008 doubles 554 ** with conventional endianess (12345678 or 87654321), in CPUs that do 555 ** not produce signaling NaN values (all NaNs are quiet). 556 */ 557 558 /* Microsoft compiler on a Pentium (32 bit) ? */ 559 #if defined(LUA_WIN) && defined(_MSC_VER) && defined(_M_IX86) /* { */ 560 561 #define LUA_MSASMTRICK 562 #define LUA_IEEEENDIAN 0 563 #define LUA_NANTRICK 564 565 566 /* pentium 32 bits? */ 567 #elif defined(__i386__) || defined(__i386) || defined(__X86__) /* }{ */ 568 569 #define LUA_IEEE754TRICK 570 #define LUA_IEEELL 571 #define LUA_IEEEENDIAN 0 572 #define LUA_NANTRICK 573 574 /* pentium 64 bits? */ 575 #elif defined(__x86_64) /* }{ */ 576 577 #define LUA_IEEE754TRICK 578 #define LUA_IEEEENDIAN 0 579 580 #elif defined(__POWERPC__) || defined(__ppc__) /* }{ */ 581 582 #define LUA_IEEE754TRICK 583 #define LUA_IEEEENDIAN 1 584 585 #else /* }{ */ 586 587 /* assume IEEE754 and a 32-bit integer type */ 588 #define LUA_IEEE754TRICK 589 590 #endif /* } */ 591 592 #endif /* } */ 593 594 /* }================================================================== */ 595 596 597 598 599 /* =================================================================== */ 600 601 /* 602 ** Local configuration. You can use this space to add your redefinitions 603 ** without modifying the main part of the file. 604 */ 605 606 607 608 #endif 609 610
