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 551 552