1 /* 2 ** $Id: luaconf.h,v 1.238 2014/12/29 13:27:55 roberto Exp $ 3 ** Configuration file for Lua 4 ** See Copyright Notice in lua.h 5 */ 6 7 8 #ifndef luaconf_h 9 #define luaconf_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 ** {==================================================================== 24 ** System Configuration: macros to adapt (if needed) Lua to some 25 ** particular platform, for instance compiling it with 32-bit numbers or 26 ** restricting it to C89. 27 ** ===================================================================== 28 */ 29 30 /* 31 @@ LUA_32BITS enables Lua with 32-bit integers and 32-bit floats. You 32 ** can also define LUA_32BITS in the make file, but changing here you 33 ** ensure that all software connected to Lua will be compiled with the 34 ** same configuration. 35 */ 36 /* #define LUA_32BITS */ 37 38 39 /* 40 @@ LUA_USE_C89 controls the use of non-ISO-C89 features. 41 ** Define it if you want Lua to avoid the use of a few C99 features 42 ** or Windows-specific features on Windows. 43 */ 44 /* #define LUA_USE_C89 */ 45 46 47 /* 48 ** By default, Lua on Windows use (some) specific Windows features 49 */ 50 #if !defined(LUA_USE_C89) && defined(_WIN32) && !defined(_WIN32_WCE) 51 #define LUA_USE_WINDOWS /* enable goodies for regular Windows */ 52 #endif 53 54 55 #if defined(LUA_USE_WINDOWS) 56 #define LUA_DL_DLL /* enable support for DLL */ 57 #define LUA_USE_C89 /* broadly, Windows is C89 */ 58 #endif 59 60 61 #if defined(LUA_USE_LINUX) 62 #define LUA_USE_POSIX 63 #define LUA_USE_DLOPEN /* needs an extra library: -ldl */ 64 #define LUA_USE_READLINE /* needs some extra libraries */ 65 #endif 66 67 68 #if defined(LUA_USE_MACOSX) 69 #define LUA_USE_POSIX 70 #define LUA_USE_DLOPEN /* MacOS does not need -ldl */ 71 #define LUA_USE_READLINE /* needs an extra library: -lreadline */ 72 #endif 73 74 75 /* 76 @@ LUA_C89_NUMBERS ensures that Lua uses the largest types available for 77 ** C89 ('long' and 'double'); Windows always has '__int64', so it does 78 ** not need to use this case. 79 */ 80 #if defined(LUA_USE_C89) && !defined(LUA_USE_WINDOWS) 81 #define LUA_C89_NUMBERS 82 #endif 83 84 85 86 /* 87 @@ LUAI_BITSINT defines the (minimum) number of bits in an 'int'. 88 */ 89 /* avoid undefined shifts */ 90 #if ((INT_MAX >> 15) >> 15) >= 1 91 #define LUAI_BITSINT 32 92 #else 93 /* 'int' always must have at least 16 bits */ 94 #define LUAI_BITSINT 16 95 #endif 96 97 98 /* 99 @@ LUA_INT_INT / LUA_INT_LONG / LUA_INT_LONGLONG defines the type for 100 ** Lua integers. 101 @@ LUA_REAL_FLOAT / LUA_REAL_DOUBLE / LUA_REAL_LONGDOUBLE defines 102 ** the type for Lua floats. 103 ** Lua should work fine with any mix of these options (if supported 104 ** by your C compiler). The usual configurations are 64-bit integers 105 ** and 'double' (the default), 32-bit integers and 'float' (for 106 ** restricted platforms), and 'long'/'double' (for C compilers not 107 ** compliant with C99, which may not have support for 'long long'). 108 */ 109 110 #if defined(LUA_32BITS) /* { */ 111 /* 112 ** 32-bit integers and 'float' 113 */ 114 #if LUAI_BITSINT >= 32 /* use 'int' if big enough */ 115 #define LUA_INT_INT 116 #else /* otherwise use 'long' */ 117 #define LUA_INT_LONG 118 #endif 119 #define LUA_REAL_FLOAT 120 121 #elif defined(LUA_C89_NUMBERS) /* }{ */ 122 /* 123 ** largest types available for C89 ('long' and 'double') 124 */ 125 #define LUA_INT_LONG 126 #define LUA_REAL_DOUBLE 127 128 #else /* }{ */ 129 /* 130 ** default configuration for 64-bit Lua ('long long' and 'double') 131 */ 132 #define LUA_INT_LONGLONG 133 #define LUA_REAL_DOUBLE 134 135 #endif /* } */ 136 137 /* }================================================================== */ 138 139 140 141 142 /* 143 ** {================================================================== 144 ** Configuration for Paths. 145 ** =================================================================== 146 */ 147 148 /* 149 @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for 150 ** Lua libraries. 151 @@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for 152 ** C libraries. 153 ** CHANGE them if your machine has a non-conventional directory 154 ** hierarchy or if you want to install your libraries in 155 ** non-conventional directories. 156 */ 157 #define LUA_VDIR LUA_VERSION_MAJOR "." LUA_VERSION_MINOR 158 #if defined(_WIN32) /* { */ 159 /* 160 ** In Windows, any exclamation mark ('!') in the path is replaced by the 161 ** path of the directory of the executable file of the current process. 162 */ 163 #define LUA_LDIR "!\\lua\\" 164 #define LUA_CDIR "!\\" 165 #define LUA_SHRDIR "!\\..\\share\\lua\\" LUA_VDIR "\\" 166 #define LUA_PATH_DEFAULT \ 167 LUA_LDIR"?.lua;" LUA_LDIR"?\\init.lua;" \ 168 LUA_CDIR"?.lua;" LUA_CDIR"?\\init.lua;" \ 169 LUA_SHRDIR"?.lua;" LUA_SHRDIR"?\\init.lua;" \ 170 ".\\?.lua;" ".\\?\\init.lua" 171 #define LUA_CPATH_DEFAULT \ 172 LUA_CDIR"?.dll;" \ 173 LUA_CDIR"..\\lib\\lua\\" LUA_VDIR "\\?.dll;" \ 174 LUA_CDIR"loadall.dll;" ".\\?.dll" 175 176 #else /* }{ */ 177 178 #define LUA_ROOT "/usr/local/" 179 #define LUA_LDIR LUA_ROOT "share/lua/" LUA_VDIR "/" 180 #define LUA_CDIR LUA_ROOT "lib/lua/" LUA_VDIR "/" 181 #define LUA_PATH_DEFAULT \ 182 LUA_LDIR"?.lua;" LUA_LDIR"?/init.lua;" \ 183 LUA_CDIR"?.lua;" LUA_CDIR"?/init.lua;" \ 184 "./?.lua;" "./?/init.lua" 185 #define LUA_CPATH_DEFAULT \ 186 LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" "./?.so" 187 #endif /* } */ 188 189 190 /* 191 @@ LUA_DIRSEP is the directory separator (for submodules). 192 ** CHANGE it if your machine does not use "/" as the directory separator 193 ** and is not Windows. (On Windows Lua automatically uses "\".) 194 */ 195 #if defined(_WIN32) 196 #define LUA_DIRSEP "\\" 197 #else 198 #define LUA_DIRSEP "/" 199 #endif 200 201 /* }================================================================== */ 202 203 204 /* 205 ** {================================================================== 206 ** Marks for exported symbols in the C code 207 ** =================================================================== 208 */ 209 210 /* 211 @@ LUA_API is a mark for all core API functions. 212 @@ LUALIB_API is a mark for all auxiliary library functions. 213 @@ LUAMOD_API is a mark for all standard library opening functions. 214 ** CHANGE them if you need to define those functions in some special way. 215 ** For instance, if you want to create one Windows DLL with the core and 216 ** the libraries, you may want to use the following definition (define 217 ** LUA_BUILD_AS_DLL to get it). 218 */ 219 #if defined(LUA_BUILD_AS_DLL) /* { */ 220 221 #if defined(LUA_CORE) || defined(LUA_LIB) /* { */ 222 #define LUA_API __declspec(dllexport) 223 #else /* }{ */ 224 #define LUA_API __declspec(dllimport) 225 #endif /* } */ 226 227 #else /* }{ */ 228 229 #define LUA_API extern 230 231 #endif /* } */ 232 233 234 /* more often than not the libs go together with the core */ 235 #define LUALIB_API LUA_API 236 #define LUAMOD_API LUALIB_API 237 238 239 /* 240 @@ LUAI_FUNC is a mark for all extern functions that are not to be 241 ** exported to outside modules. 242 @@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables 243 ** that are not to be exported to outside modules (LUAI_DDEF for 244 ** definitions and LUAI_DDEC for declarations). 245 ** CHANGE them if you need to mark them in some special way. Elf/gcc 246 ** (versions 3.2 and later) mark them as "hidden" to optimize access 247 ** when Lua is compiled as a shared library. Not all elf targets support 248 ** this attribute. Unfortunately, gcc does not offer a way to check 249 ** whether the target offers that support, and those without support 250 ** give a warning about it. To avoid these warnings, change to the 251 ** default definition. 252 */ 253 #if defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \ 254 defined(__ELF__) /* { */ 255 #define LUAI_FUNC __attribute__((visibility("hidden"))) extern 256 #else /* }{ */ 257 #define LUAI_FUNC extern 258 #endif /* } */ 259 260 #define LUAI_DDEC LUAI_FUNC 261 #define LUAI_DDEF /* empty */ 262 263 /* }================================================================== */ 264 265 266 /* 267 ** {================================================================== 268 ** Compatibility with previous versions 269 ** =================================================================== 270 */ 271 272 /* 273 @@ LUA_COMPAT_5_2 controls other macros for compatibility with Lua 5.2. 274 @@ LUA_COMPAT_5_1 controls other macros for compatibility with Lua 5.1. 275 ** You can define it to get all options, or change specific options 276 ** to fit your specific needs. 277 */ 278 #if defined(LUA_COMPAT_5_2) /* { */ 279 280 /* 281 @@ LUA_COMPAT_MATHLIB controls the presence of several deprecated 282 ** functions in the mathematical library. 283 */ 284 #define LUA_COMPAT_MATHLIB 285 286 /* 287 @@ LUA_COMPAT_BITLIB controls the presence of library 'bit32'. 288 */ 289 #define LUA_COMPAT_BITLIB 290 291 /* 292 @@ LUA_COMPAT_IPAIRS controls the effectiveness of the __ipairs metamethod. 293 */ 294 #define LUA_COMPAT_IPAIRS 295 296 /* 297 @@ LUA_COMPAT_APIINTCASTS controls the presence of macros for 298 ** manipulating other integer types (lua_pushunsigned, lua_tounsigned, 299 ** luaL_checkint, luaL_checklong, etc.) 300 */ 301 #define LUA_COMPAT_APIINTCASTS 302 303 304 /* 305 @@ LUA_COMPAT_FLOATSTRING makes Lua format integral floats without a 306 @@ a float mark ('.0'). 307 ** This macro is not on by default even in compatibility mode, 308 ** because this is not really an incompatibility. 309 */ 310 /* #define LUA_COMPAT_FLOATSTRING */ 311 312 #endif /* } */ 313 314 315 #if defined(LUA_COMPAT_5_1) /* { */ 316 317 /* 318 @@ LUA_COMPAT_UNPACK controls the presence of global 'unpack'. 319 ** You can replace it with 'table.unpack'. 320 */ 321 #define LUA_COMPAT_UNPACK 322 323 /* 324 @@ LUA_COMPAT_LOADERS controls the presence of table 'package.loaders'. 325 ** You can replace it with 'package.searchers'. 326 */ 327 #define LUA_COMPAT_LOADERS 328 329 /* 330 @@ macro 'lua_cpcall' emulates deprecated function lua_cpcall. 331 ** You can call your C function directly (with light C functions). 332 */ 333 #define lua_cpcall(L,f,u) \ 334 (lua_pushcfunction(L, (f)), \ 335 lua_pushlightuserdata(L,(u)), \ 336 lua_pcall(L,1,0,0)) 337 338 339 /* 340 @@ LUA_COMPAT_LOG10 defines the function 'log10' in the math library. 341 ** You can rewrite 'log10(x)' as 'log(x, 10)'. 342 */ 343 #define LUA_COMPAT_LOG10 344 345 /* 346 @@ LUA_COMPAT_LOADSTRING defines the function 'loadstring' in the base 347 ** library. You can rewrite 'loadstring(s)' as 'load(s)'. 348 */ 349 #define LUA_COMPAT_LOADSTRING 350 351 /* 352 @@ LUA_COMPAT_MAXN defines the function 'maxn' in the table library. 353 */ 354 #define LUA_COMPAT_MAXN 355 356 /* 357 @@ The following macros supply trivial compatibility for some 358 ** changes in the API. The macros themselves document how to 359 ** change your code to avoid using them. 360 */ 361 #define lua_strlen(L,i) lua_rawlen(L, (i)) 362 363 #define lua_objlen(L,i) lua_rawlen(L, (i)) 364 365 #define lua_equal(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPEQ) 366 #define lua_lessthan(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPLT) 367 368 /* 369 @@ LUA_COMPAT_MODULE controls compatibility with previous 370 ** module functions 'module' (Lua) and 'luaL_register' (C). 371 */ 372 #define LUA_COMPAT_MODULE 373 374 #endif /* } */ 375 376 /* }================================================================== */ 377 378 379 380 /* 381 ** {================================================================== 382 ** Configuration for Numbers. 383 ** Change these definitions if no predefined LUA_REAL_* / LUA_INT_* 384 ** satisfy your needs. 385 ** =================================================================== 386 */ 387 388 /* 389 @@ LUA_NUMBER is the floating-point type used by Lua. 390 ** 391 @@ LUAI_UACNUMBER is the result of an 'usual argument conversion' 392 @@ over a floating number. 393 ** 394 @@ LUA_NUMBER_FRMLEN is the length modifier for writing floats. 395 @@ LUA_NUMBER_FMT is the format for writing floats. 396 @@ lua_number2str converts a float to a string. 397 ** 398 @@ l_mathop allows the addition of an 'l' or 'f' to all math operations. 399 ** 400 @@ lua_str2number converts a decimal numeric string to a number. 401 */ 402 403 #if defined(LUA_REAL_FLOAT) /* { single float */ 404 405 #define LUA_NUMBER float 406 407 #define LUAI_UACNUMBER double 408 409 #define LUA_NUMBER_FRMLEN "" 410 #define LUA_NUMBER_FMT "%.7g" 411 412 #define l_mathop(op) op##f 413 414 #define lua_str2number(s,p) strtof((s), (p)) 415 416 417 #elif defined(LUA_REAL_LONGDOUBLE) /* }{ long double */ 418 419 #define LUA_NUMBER long double 420 421 #define LUAI_UACNUMBER long double 422 423 #define LUA_NUMBER_FRMLEN "L" 424 #define LUA_NUMBER_FMT "%.19Lg" 425 426 #define l_mathop(op) op##l 427 428 #define lua_str2number(s,p) strtold((s), (p)) 429 430 #elif defined(LUA_REAL_DOUBLE) /* }{ double */ 431 432 #define LUA_NUMBER double 433 434 #define LUAI_UACNUMBER double 435 436 #define LUA_NUMBER_FRMLEN "" 437 #define LUA_NUMBER_FMT "%.14g" 438 439 #define l_mathop(op) op 440 441 #define lua_str2number(s,p) strtod((s), (p)) 442 443 #else /* }{ */ 444 445 #error "numeric real type not defined" 446 447 #endif /* } */ 448 449 450 #define l_floor(x) (l_mathop(floor)(x)) 451 452 #define lua_number2str(s,n) sprintf((s), LUA_NUMBER_FMT, (n)) 453 454 455 /* 456 @@ lua_numbertointeger converts a float number to an integer, or 457 ** returns 0 if float is not within the range of a lua_Integer. 458 ** (The range comparisons are tricky because of rounding. The tests 459 ** here assume a two-complement representation, where MININTEGER always 460 ** has an exact representation as a float; MAXINTEGER may not have one, 461 ** and therefore its conversion to float may have an ill-defined value.) 462 */ 463 #define lua_numbertointeger(n,p) \ 464 ((n) >= (LUA_NUMBER)(LUA_MININTEGER) && \ 465 (n) < -(LUA_NUMBER)(LUA_MININTEGER) && \ 466 (*(p) = (LUA_INTEGER)(n), 1)) 467 468 469 /* 470 @@ The luai_num* macros define the primitive operations over numbers. 471 ** They should work for any size of floating numbers. 472 */ 473 474 /* the following operations need the math library */ 475 #if defined(lobject_c) || defined(lvm_c) 476 #include <math.h> 477 478 /* floor division (defined as 'floor(a/b)') */ 479 #define luai_numidiv(L,a,b) ((void)L, l_mathop(floor)(luai_numdiv(L,a,b))) 480 481 /* 482 ** module: defined as 'a - floor(a/b)*b'; the previous definition gives 483 ** NaN when 'b' is huge, but the result should be 'a'. 'fmod' gives the 484 ** result of 'a - trunc(a/b)*b', and therefore must be corrected when 485 ** 'trunc(a/b) ~= floor(a/b)'. That happens when the division has a 486 ** non-integer negative result, which is equivalent to the test below 487 */ 488 #define luai_nummod(L,a,b,m) \ 489 { (m) = l_mathop(fmod)(a,b); if ((m)*(b) < 0) (m) += (b); } 490 491 /* exponentiation */ 492 #define luai_numpow(L,a,b) ((void)L, l_mathop(pow)(a,b)) 493 494 #endif 495 496 /* these are quite standard operations */ 497 #if defined(LUA_CORE) 498 #define luai_numadd(L,a,b) ((a)+(b)) 499 #define luai_numsub(L,a,b) ((a)-(b)) 500 #define luai_nummul(L,a,b) ((a)*(b)) 501 #define luai_numdiv(L,a,b) ((a)/(b)) 502 #define luai_numunm(L,a) (-(a)) 503 #define luai_numeq(a,b) ((a)==(b)) 504 #define luai_numlt(a,b) ((a)<(b)) 505 #define luai_numle(a,b) ((a)<=(b)) 506 #define luai_numisnan(a) (!luai_numeq((a), (a))) 507 #endif 508 509 510 /* 511 @@ LUA_INTEGER is the integer type used by Lua. 512 ** 513 @@ LUA_UNSIGNED is the unsigned version of LUA_INTEGER. 514 ** 515 @@ LUAI_UACINT is the result of an 'usual argument conversion' 516 @@ over a lUA_INTEGER. 517 @@ LUA_INTEGER_FRMLEN is the length modifier for reading/writing integers. 518 @@ LUA_INTEGER_FMT is the format for writing integers. 519 @@ LUA_MAXINTEGER is the maximum value for a LUA_INTEGER. 520 @@ LUA_MININTEGER is the minimum value for a LUA_INTEGER. 521 @@ lua_integer2str converts an integer to a string. 522 */ 523 524 525 /* The following definitions are good for most cases here */ 526 527 #define LUA_INTEGER_FMT "%" LUA_INTEGER_FRMLEN "d" 528 #define lua_integer2str(s,n) sprintf((s), LUA_INTEGER_FMT, (n)) 529 530 #define LUAI_UACINT LUA_INTEGER 531 532 /* 533 ** use LUAI_UACINT here to avoid problems with promotions (which 534 ** can turn a comparison between unsigneds into a signed comparison) 535 */ 536 #define LUA_UNSIGNED unsigned LUAI_UACINT 537 538 539 /* now the variable definitions */ 540 541 #if defined(LUA_INT_INT) /* { int */ 542 543 #define LUA_INTEGER int 544 #define LUA_INTEGER_FRMLEN "" 545 546 #define LUA_MAXINTEGER INT_MAX 547 #define LUA_MININTEGER INT_MIN 548 549 #elif defined(LUA_INT_LONG) /* }{ long */ 550 551 #define LUA_INTEGER long 552 #define LUA_INTEGER_FRMLEN "l" 553 554 #define LUA_MAXINTEGER LONG_MAX 555 #define LUA_MININTEGER LONG_MIN 556 557 #elif defined(LUA_INT_LONGLONG) /* }{ long long */ 558 559 #if defined(LLONG_MAX) /* { */ 560 /* use ISO C99 stuff */ 561 562 #define LUA_INTEGER long long 563 #define LUA_INTEGER_FRMLEN "ll" 564 565 #define LUA_MAXINTEGER LLONG_MAX 566 #define LUA_MININTEGER LLONG_MIN 567 568 #elif defined(LUA_USE_WINDOWS) /* }{ */ 569 /* in Windows, can use specific Windows types */ 570 571 #define LUA_INTEGER __int64 572 #define LUA_INTEGER_FRMLEN "I64" 573 574 #define LUA_MAXINTEGER _I64_MAX 575 #define LUA_MININTEGER _I64_MIN 576 577 #else /* }{ */ 578 579 #error "Compiler does not support 'long long'. Use option '-DLUA_32BITS' \ 580 or '-DLUA_C89_NUMBERS' (see file 'luaconf.h' for details)" 581 582 #endif /* } */ 583 584 #else /* }{ */ 585 586 #error "numeric integer type not defined" 587 588 #endif /* } */ 589 590 /* }================================================================== */ 591 592 593 /* 594 ** {================================================================== 595 ** Dependencies with C99 596 ** =================================================================== 597 */ 598 599 /* 600 @@ lua_strx2number converts an hexadecimal numeric string to a number. 601 ** In C99, 'strtod' does both conversions. Otherwise, you can 602 ** leave 'lua_strx2number' undefined and Lua will provide its own 603 ** implementation. 604 */ 605 #if !defined(LUA_USE_C89) 606 #define lua_strx2number(s,p) lua_str2number(s,p) 607 #endif 608 609 610 /* 611 @@ LUA_USE_AFORMAT allows '%a'/'%A' specifiers in 'string.format' 612 ** Enable it if the C function 'printf' supports these specifiers. 613 ** (C99 demands it and Windows also supports it.) 614 */ 615 #if !defined(LUA_USE_C89) || defined(LUA_USE_WINDOWS) 616 #define LUA_USE_AFORMAT 617 #endif 618 619 620 /* 621 ** 'strtof' and 'opf' variants for math functions are not valid in 622 ** C89. Otherwise, the macro 'HUGE_VALF' is a good proxy for testing the 623 ** availability of these variants. ('math.h' is already included in 624 ** all files that use these macros.) 625 */ 626 #if defined(LUA_USE_C89) || (defined(HUGE_VAL) && !defined(HUGE_VALF)) 627 #undef l_mathop /* variants not available */ 628 #undef lua_str2number 629 #define l_mathop(op) (lua_Number)op /* no variant */ 630 #define lua_str2number(s,p) ((lua_Number)strtod((s), (p))) 631 #endif 632 633 634 /* 635 @@ LUA_KCONTEXT is the type of the context ('ctx') for continuation 636 ** functions. It must be a numerical type; Lua will use 'intptr_t' if 637 ** available, otherwise it will use 'ptrdiff_t' (the nearest thing to 638 ** 'intptr_t' in C89) 639 */ 640 #define LUA_KCONTEXT ptrdiff_t 641 642 #if !defined(LUA_USE_C89) && defined(__STDC_VERSION__) && \ 643 __STDC_VERSION__ >= 199901L 644 #include <stdint.h> 645 #if defined (INTPTR_MAX) /* even in C99 this type is optional */ 646 #undef LUA_KCONTEXT 647 #define LUA_KCONTEXT intptr_t 648 #endif 649 #endif 650 651 /* }================================================================== */ 652 653 654 /* 655 ** {================================================================== 656 ** Macros that affect the API and must be stable (that is, must be the 657 ** same when you compile Lua and when you compile code that links to 658 ** Lua). You probably do not want/need to change them. 659 ** ===================================================================== 660 */ 661 662 /* 663 @@ LUAI_MAXSTACK limits the size of the Lua stack. 664 ** CHANGE it if you need a different limit. This limit is arbitrary; 665 ** its only purpose is to stop Lua from consuming unlimited stack 666 ** space (and to reserve some numbers for pseudo-indices). 667 */ 668 #if LUAI_BITSINT >= 32 669 #define LUAI_MAXSTACK 1000000 670 #else 671 #define LUAI_MAXSTACK 15000 672 #endif 673 674 /* reserve some space for error handling */ 675 #define LUAI_FIRSTPSEUDOIDX (-LUAI_MAXSTACK - 1000) 676 677 678 /* 679 @@ LUA_EXTRASPACE defines the size of a raw memory area associated with 680 ** a Lua state with very fast access. 681 ** CHANGE it if you need a different size. 682 */ 683 #define LUA_EXTRASPACE (sizeof(void *)) 684 685 686 /* 687 @@ LUA_IDSIZE gives the maximum size for the description of the source 688 @@ of a function in debug information. 689 ** CHANGE it if you want a different size. 690 */ 691 #define LUA_IDSIZE 60 692 693 694 /* 695 @@ LUAI_MAXSHORTLEN is the maximum length for short strings, that is, 696 ** strings that are internalized. (Cannot be smaller than reserved words 697 ** or tags for metamethods, as these strings must be internalized; 698 ** #("function") = 8, #("__newindex") = 10.) 699 */ 700 #define LUAI_MAXSHORTLEN 40 701 702 703 /* 704 @@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system. 705 ** CHANGE it if it uses too much C-stack space. 706 */ 707 #define LUAL_BUFFERSIZE ((int)(0x80 * sizeof(void*) * sizeof(lua_Integer))) 708 709 /* }================================================================== */ 710 711 712 /* 713 @@ LUA_QL describes how error messages quote program elements. 714 ** Lua does not use these macros anymore; they are here for 715 ** compatibility only. 716 */ 717 #define LUA_QL(x) "'" x "'" 718 #define LUA_QS LUA_QL("%s") 719 720 721 722 723 /* =================================================================== */ 724 725 /* 726 ** Local configuration. You can use this space to add your redefinitions 727 ** without modifying the main part of the file. 728 */ 729 730 731 732 733 734 #endif 735 736