1 /* 2 ** $Id: luaconf.h $ 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 ** General Configuration File for Lua 18 ** 19 ** Some definitions here can be changed externally, through the 20 ** compiler (e.g., with '-D' options). Those are protected by 21 ** '#if !defined' guards. However, several other definitions should 22 ** be changed directly here, either because they affect the Lua 23 ** ABI (by making the changes here, you ensure that all software 24 ** connected to Lua, such as C libraries, will be compiled with the 25 ** same configuration); or because they are seldom changed. 26 ** 27 ** Search for "@@" to find all configurable definitions. 28 ** =================================================================== 29 */ 30 31 32 /* 33 ** {==================================================================== 34 ** System Configuration: macros to adapt (if needed) Lua to some 35 ** particular platform, for instance restricting it to C89. 36 ** ===================================================================== 37 */ 38 39 /* 40 @@ LUAI_MAXCSTACK defines the maximum depth for nested calls and 41 ** also limits the maximum depth of other recursive algorithms in 42 ** the implementation, such as syntactic analysis. A value too 43 ** large may allow the interpreter to crash (C-stack overflow). 44 ** The default value seems ok for regular machines, but may be 45 ** too high for restricted hardware. 46 ** The test file 'cstack.lua' may help finding a good limit. 47 ** (It will crash with a limit too high.) 48 */ 49 #if !defined(LUAI_MAXCSTACK) 50 #define LUAI_MAXCSTACK 2000 51 #endif 52 53 54 /* 55 @@ LUA_USE_C89 controls the use of non-ISO-C89 features. 56 ** Define it if you want Lua to avoid the use of a few C99 features 57 ** or Windows-specific features on Windows. 58 */ 59 /* #define LUA_USE_C89 */ 60 61 62 /* 63 ** By default, Lua on Windows use (some) specific Windows features 64 */ 65 #if !defined(LUA_USE_C89) && defined(_WIN32) && !defined(_WIN32_WCE) 66 #define LUA_USE_WINDOWS /* enable goodies for regular Windows */ 67 #endif 68 69 70 #if defined(LUA_USE_WINDOWS) 71 #define LUA_DL_DLL /* enable support for DLL */ 72 #define LUA_USE_C89 /* broadly, Windows is C89 */ 73 #endif 74 75 76 #if defined(LUA_USE_LINUX) 77 #define LUA_USE_POSIX 78 #define LUA_USE_DLOPEN /* needs an extra library: -ldl */ 79 #endif 80 81 82 #if defined(LUA_USE_MACOSX) 83 #define LUA_USE_POSIX 84 #define LUA_USE_DLOPEN /* MacOS does not need -ldl */ 85 #endif 86 87 88 /* 89 @@ LUAI_IS32INT is true iff 'int' has (at least) 32 bits. 90 */ 91 #define LUAI_IS32INT ((UINT_MAX >> 30) >= 3) 92 93 /* }================================================================== */ 94 95 96 97 /* 98 ** {================================================================== 99 ** Configuration for Number types. 100 ** =================================================================== 101 */ 102 103 /* 104 @@ LUA_32BITS enables Lua with 32-bit integers and 32-bit floats. 105 */ 106 /* #define LUA_32BITS */ 107 108 109 /* 110 @@ LUA_C89_NUMBERS ensures that Lua uses the largest types available for 111 ** C89 ('long' and 'double'); Windows always has '__int64', so it does 112 ** not need to use this case. 113 */ 114 #if defined(LUA_USE_C89) && !defined(LUA_USE_WINDOWS) 115 #define LUA_C89_NUMBERS 116 #endif 117 118 119 /* 120 @@ LUA_INT_TYPE defines the type for Lua integers. 121 @@ LUA_FLOAT_TYPE defines the type for Lua floats. 122 ** Lua should work fine with any mix of these options supported 123 ** by your C compiler. The usual configurations are 64-bit integers 124 ** and 'double' (the default), 32-bit integers and 'float' (for 125 ** restricted platforms), and 'long'/'double' (for C compilers not 126 ** compliant with C99, which may not have support for 'long long'). 127 */ 128 129 /* predefined options for LUA_INT_TYPE */ 130 #define LUA_INT_INT 1 131 #define LUA_INT_LONG 2 132 #define LUA_INT_LONGLONG 3 133 134 /* predefined options for LUA_FLOAT_TYPE */ 135 #define LUA_FLOAT_FLOAT 1 136 #define LUA_FLOAT_DOUBLE 2 137 #define LUA_FLOAT_LONGDOUBLE 3 138 139 #if defined(LUA_32BITS) /* { */ 140 /* 141 ** 32-bit integers and 'float' 142 */ 143 #if LUAI_IS32INT /* use 'int' if big enough */ 144 #define LUA_INT_TYPE LUA_INT_INT 145 #else /* otherwise use 'long' */ 146 #define LUA_INT_TYPE LUA_INT_LONG 147 #endif 148 #define LUA_FLOAT_TYPE LUA_FLOAT_FLOAT 149 150 #elif defined(LUA_C89_NUMBERS) /* }{ */ 151 /* 152 ** largest types available for C89 ('long' and 'double') 153 */ 154 #define LUA_INT_TYPE LUA_INT_LONG 155 #define LUA_FLOAT_TYPE LUA_FLOAT_DOUBLE 156 157 #endif /* } */ 158 159 160 /* 161 ** default configuration for 64-bit Lua ('long long' and 'double') 162 */ 163 #if !defined(LUA_INT_TYPE) 164 #define LUA_INT_TYPE LUA_INT_LONGLONG 165 #endif 166 167 #if !defined(LUA_FLOAT_TYPE) 168 #define LUA_FLOAT_TYPE LUA_FLOAT_DOUBLE 169 #endif 170 171 /* }================================================================== */ 172 173 174 175 /* 176 ** {================================================================== 177 ** Configuration for Paths. 178 ** =================================================================== 179 */ 180 181 /* 182 ** LUA_PATH_SEP is the character that separates templates in a path. 183 ** LUA_PATH_MARK is the string that marks the substitution points in a 184 ** template. 185 ** LUA_EXEC_DIR in a Windows path is replaced by the executable's 186 ** directory. 187 */ 188 #define LUA_PATH_SEP ";" 189 #define LUA_PATH_MARK "?" 190 #define LUA_EXEC_DIR "!" 191 192 193 /* 194 @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for 195 ** Lua libraries. 196 @@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for 197 ** C libraries. 198 ** CHANGE them if your machine has a non-conventional directory 199 ** hierarchy or if you want to install your libraries in 200 ** non-conventional directories. 201 */ 202 203 #define LUA_VDIR LUA_VERSION_MAJOR "." LUA_VERSION_MINOR 204 #if defined(_WIN32) /* { */ 205 /* 206 ** In Windows, any exclamation mark ('!') in the path is replaced by the 207 ** path of the directory of the executable file of the current process. 208 */ 209 #define LUA_LDIR "!\\lua\\" 210 #define LUA_CDIR "!\\" 211 #define LUA_SHRDIR "!\\..\\share\\lua\\" LUA_VDIR "\\" 212 213 #if !defined(LUA_PATH_DEFAULT) 214 #define LUA_PATH_DEFAULT \ 215 LUA_LDIR"?.lua;" LUA_LDIR"?\\init.lua;" \ 216 LUA_CDIR"?.lua;" LUA_CDIR"?\\init.lua;" \ 217 LUA_SHRDIR"?.lua;" LUA_SHRDIR"?\\init.lua;" \ 218 ".\\?.lua;" ".\\?\\init.lua" 219 #endif 220 221 #if !defined(LUA_CPATH_DEFAULT) 222 #define LUA_CPATH_DEFAULT \ 223 LUA_CDIR"?.dll;" \ 224 LUA_CDIR"..\\lib\\lua\\" LUA_VDIR "\\?.dll;" \ 225 LUA_CDIR"loadall.dll;" ".\\?.dll" 226 #endif 227 228 #else /* }{ */ 229 230 #define LUA_ROOT "/usr/local/" 231 #define LUA_LDIR LUA_ROOT "share/lua/" LUA_VDIR "/" 232 #define LUA_CDIR LUA_ROOT "lib/lua/" LUA_VDIR "/" 233 234 #if !defined(LUA_PATH_DEFAULT) 235 #define LUA_PATH_DEFAULT \ 236 LUA_LDIR"?.lua;" LUA_LDIR"?/init.lua;" \ 237 LUA_CDIR"?.lua;" LUA_CDIR"?/init.lua;" \ 238 "./?.lua;" "./?/init.lua" 239 #endif 240 241 #if !defined(LUA_CPATH_DEFAULT) 242 #define LUA_CPATH_DEFAULT \ 243 LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" "./?.so" 244 #endif 245 246 #endif /* } */ 247 248 249 /* 250 @@ LUA_DIRSEP is the directory separator (for submodules). 251 ** CHANGE it if your machine does not use "/" as the directory separator 252 ** and is not Windows. (On Windows Lua automatically uses "\".) 253 */ 254 #if !defined(LUA_DIRSEP) 255 256 #if defined(_WIN32) 257 #define LUA_DIRSEP "\\" 258 #else 259 #define LUA_DIRSEP "/" 260 #endif 261 262 #endif 263 264 /* }================================================================== */ 265 266 267 /* 268 ** {================================================================== 269 ** Marks for exported symbols in the C code 270 ** =================================================================== 271 */ 272 273 /* 274 @@ LUA_API is a mark for all core API functions. 275 @@ LUALIB_API is a mark for all auxiliary library functions. 276 @@ LUAMOD_API is a mark for all standard library opening functions. 277 ** CHANGE them if you need to define those functions in some special way. 278 ** For instance, if you want to create one Windows DLL with the core and 279 ** the libraries, you may want to use the following definition (define 280 ** LUA_BUILD_AS_DLL to get it). 281 */ 282 #if defined(LUA_BUILD_AS_DLL) /* { */ 283 284 #if defined(LUA_CORE) || defined(LUA_LIB) /* { */ 285 #define LUA_API __declspec(dllexport) 286 #else /* }{ */ 287 #define LUA_API __declspec(dllimport) 288 #endif /* } */ 289 290 #else /* }{ */ 291 292 #define LUA_API extern 293 294 #endif /* } */ 295 296 297 /* 298 ** More often than not the libs go together with the core. 299 */ 300 #define LUALIB_API LUA_API 301 #define LUAMOD_API LUA_API 302 303 304 /* 305 @@ LUAI_FUNC is a mark for all extern functions that are not to be 306 ** exported to outside modules. 307 @@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables, 308 ** none of which to be exported to outside modules (LUAI_DDEF for 309 ** definitions and LUAI_DDEC for declarations). 310 ** CHANGE them if you need to mark them in some special way. Elf/gcc 311 ** (versions 3.2 and later) mark them as "hidden" to optimize access 312 ** when Lua is compiled as a shared library. Not all elf targets support 313 ** this attribute. Unfortunately, gcc does not offer a way to check 314 ** whether the target offers that support, and those without support 315 ** give a warning about it. To avoid these warnings, change to the 316 ** default definition. 317 */ 318 #if defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \ 319 defined(__ELF__) /* { */ 320 #define LUAI_FUNC __attribute__((visibility("internal"))) extern 321 #else /* }{ */ 322 #define LUAI_FUNC extern 323 #endif /* } */ 324 325 #define LUAI_DDEC(dec) LUAI_FUNC dec 326 #define LUAI_DDEF /* empty */ 327 328 /* }================================================================== */ 329 330 331 /* 332 ** {================================================================== 333 ** Compatibility with previous versions 334 ** =================================================================== 335 */ 336 337 /* 338 @@ LUA_COMPAT_5_3 controls other macros for compatibility with Lua 5.3. 339 ** You can define it to get all options, or change specific options 340 ** to fit your specific needs. 341 */ 342 #if defined(LUA_COMPAT_5_3) /* { */ 343 344 /* 345 @@ LUA_COMPAT_MATHLIB controls the presence of several deprecated 346 ** functions in the mathematical library. 347 ** (These functions were already officially removed in 5.3; 348 ** nevertheless they are still available here.) 349 */ 350 #define LUA_COMPAT_MATHLIB 351 352 /* 353 @@ LUA_COMPAT_APIINTCASTS controls the presence of macros for 354 ** manipulating other integer types (lua_pushunsigned, lua_tounsigned, 355 ** luaL_checkint, luaL_checklong, etc.) 356 ** (These macros were also officially removed in 5.3, but they are still 357 ** available here.) 358 */ 359 #define LUA_COMPAT_APIINTCASTS 360 361 362 /* 363 @@ LUA_COMPAT_LT_LE controls the emulation of the '__le' metamethod 364 ** using '__lt'. 365 */ 366 #define LUA_COMPAT_LT_LE 367 368 369 /* 370 @@ The following macros supply trivial compatibility for some 371 ** changes in the API. The macros themselves document how to 372 ** change your code to avoid using them. 373 ** (Once more, these macros were officially removed in 5.3, but they are 374 ** still available here.) 375 */ 376 #define lua_strlen(L,i) lua_rawlen(L, (i)) 377 378 #define lua_objlen(L,i) lua_rawlen(L, (i)) 379 380 #define lua_equal(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPEQ) 381 #define lua_lessthan(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPLT) 382 383 #endif /* } */ 384 385 /* }================================================================== */ 386 387 388 389 /* 390 ** {================================================================== 391 ** Configuration for Numbers. 392 ** Change these definitions if no predefined LUA_FLOAT_* / LUA_INT_* 393 ** satisfy your needs. 394 ** =================================================================== 395 */ 396 397 /* 398 @@ LUA_NUMBER is the floating-point type used by Lua. 399 @@ LUAI_UACNUMBER is the result of a 'default argument promotion' 400 @@ over a floating number. 401 @@ l_floatatt(x) corrects float attribute 'x' to the proper float type 402 ** by prefixing it with one of FLT/DBL/LDBL. 403 @@ LUA_NUMBER_FRMLEN is the length modifier for writing floats. 404 @@ LUA_NUMBER_FMT is the format for writing floats. 405 @@ lua_number2str converts a float to a string. 406 @@ l_mathop allows the addition of an 'l' or 'f' to all math operations. 407 @@ l_floor takes the floor of a float. 408 @@ lua_str2number converts a decimal numeral to a number. 409 */ 410 411 412 /* The following definitions are good for most cases here */ 413 414 #define l_floor(x) (l_mathop(floor)(x)) 415 416 #define lua_number2str(s,sz,n) \ 417 l_sprintf((s), sz, LUA_NUMBER_FMT, (LUAI_UACNUMBER)(n)) 418 419 /* 420 @@ lua_numbertointeger converts a float number with an integral value 421 ** to an integer, or returns 0 if float is not within the range of 422 ** a lua_Integer. (The range comparisons are tricky because of 423 ** rounding. The tests here assume a two-complement representation, 424 ** where MININTEGER always has an exact representation as a float; 425 ** MAXINTEGER may not have one, and therefore its conversion to float 426 ** may have an ill-defined value.) 427 */ 428 #define lua_numbertointeger(n,p) \ 429 ((n) >= (LUA_NUMBER)(LUA_MININTEGER) && \ 430 (n) < -(LUA_NUMBER)(LUA_MININTEGER) && \ 431 (*(p) = (LUA_INTEGER)(n), 1)) 432 433 434 /* now the variable definitions */ 435 436 #if LUA_FLOAT_TYPE == LUA_FLOAT_FLOAT /* { single float */ 437 438 #define LUA_NUMBER float 439 440 #define l_floatatt(n) (FLT_##n) 441 442 #define LUAI_UACNUMBER double 443 444 #define LUA_NUMBER_FRMLEN "" 445 #define LUA_NUMBER_FMT "%.7g" 446 447 #define l_mathop(op) op##f 448 449 #define lua_str2number(s,p) strtof((s), (p)) 450 451 452 #elif LUA_FLOAT_TYPE == LUA_FLOAT_LONGDOUBLE /* }{ long double */ 453 454 #define LUA_NUMBER long double 455 456 #define l_floatatt(n) (LDBL_##n) 457 458 #define LUAI_UACNUMBER long double 459 460 #define LUA_NUMBER_FRMLEN "L" 461 #define LUA_NUMBER_FMT "%.19Lg" 462 463 #define l_mathop(op) op##l 464 465 #define lua_str2number(s,p) strtold((s), (p)) 466 467 #elif LUA_FLOAT_TYPE == LUA_FLOAT_DOUBLE /* }{ double */ 468 469 #define LUA_NUMBER double 470 471 #define l_floatatt(n) (DBL_##n) 472 473 #define LUAI_UACNUMBER double 474 475 #define LUA_NUMBER_FRMLEN "" 476 #define LUA_NUMBER_FMT "%.14g" 477 478 #define l_mathop(op) op 479 480 #define lua_str2number(s,p) strtod((s), (p)) 481 482 #else /* }{ */ 483 484 #error "numeric float type not defined" 485 486 #endif /* } */ 487 488 489 490 /* 491 @@ LUA_INTEGER is the integer type used by Lua. 492 ** 493 @@ LUA_UNSIGNED is the unsigned version of LUA_INTEGER. 494 ** 495 @@ LUAI_UACINT is the result of a 'default argument promotion' 496 @@ over a LUA_INTEGER. 497 @@ LUA_INTEGER_FRMLEN is the length modifier for reading/writing integers. 498 @@ LUA_INTEGER_FMT is the format for writing integers. 499 @@ LUA_MAXINTEGER is the maximum value for a LUA_INTEGER. 500 @@ LUA_MININTEGER is the minimum value for a LUA_INTEGER. 501 @@ LUA_MAXUNSIGNED is the maximum value for a LUA_UNSIGNED. 502 @@ LUA_UNSIGNEDBITS is the number of bits in a LUA_UNSIGNED. 503 @@ lua_integer2str converts an integer to a string. 504 */ 505 506 507 /* The following definitions are good for most cases here */ 508 509 #define LUA_INTEGER_FMT "%" LUA_INTEGER_FRMLEN "d" 510 511 #define LUAI_UACINT LUA_INTEGER 512 513 #define lua_integer2str(s,sz,n) \ 514 l_sprintf((s), sz, LUA_INTEGER_FMT, (LUAI_UACINT)(n)) 515 516 /* 517 ** use LUAI_UACINT here to avoid problems with promotions (which 518 ** can turn a comparison between unsigneds into a signed comparison) 519 */ 520 #define LUA_UNSIGNED unsigned LUAI_UACINT 521 522 523 #define LUA_UNSIGNEDBITS (sizeof(LUA_UNSIGNED) * CHAR_BIT) 524 525 526 /* now the variable definitions */ 527 528 #if LUA_INT_TYPE == LUA_INT_INT /* { int */ 529 530 #define LUA_INTEGER int 531 #define LUA_INTEGER_FRMLEN "" 532 533 #define LUA_MAXINTEGER INT_MAX 534 #define LUA_MININTEGER INT_MIN 535 536 #define LUA_MAXUNSIGNED UINT_MAX 537 538 #elif LUA_INT_TYPE == LUA_INT_LONG /* }{ long */ 539 540 #define LUA_INTEGER long 541 #define LUA_INTEGER_FRMLEN "l" 542 543 #define LUA_MAXINTEGER LONG_MAX 544 #define LUA_MININTEGER LONG_MIN 545 546 #define LUA_MAXUNSIGNED ULONG_MAX 547 548 #elif LUA_INT_TYPE == LUA_INT_LONGLONG /* }{ long long */ 549 550 /* use presence of macro LLONG_MAX as proxy for C99 compliance */ 551 #if defined(LLONG_MAX) /* { */ 552 /* use ISO C99 stuff */ 553 554 #define LUA_INTEGER long long 555 #define LUA_INTEGER_FRMLEN "ll" 556 557 #define LUA_MAXINTEGER LLONG_MAX 558 #define LUA_MININTEGER LLONG_MIN 559 560 #define LUA_MAXUNSIGNED ULLONG_MAX 561 562 #elif defined(LUA_USE_WINDOWS) /* }{ */ 563 /* in Windows, can use specific Windows types */ 564 565 #define LUA_INTEGER __int64 566 #define LUA_INTEGER_FRMLEN "I64" 567 568 #define LUA_MAXINTEGER _I64_MAX 569 #define LUA_MININTEGER _I64_MIN 570 571 #define LUA_MAXUNSIGNED _UI64_MAX 572 573 #else /* }{ */ 574 575 #error "Compiler does not support 'long long'. Use option '-DLUA_32BITS' \ 576 or '-DLUA_C89_NUMBERS' (see file 'luaconf.h' for details)" 577 578 #endif /* } */ 579 580 #else /* }{ */ 581 582 #error "numeric integer type not defined" 583 584 #endif /* } */ 585 586 /* }================================================================== */ 587 588 589 /* 590 ** {================================================================== 591 ** Dependencies with C99 and other C details 592 ** =================================================================== 593 */ 594 595 /* 596 @@ l_sprintf is equivalent to 'snprintf' or 'sprintf' in C89. 597 ** (All uses in Lua have only one format item.) 598 */ 599 #if !defined(LUA_USE_C89) 600 #define l_sprintf(s,sz,f,i) snprintf(s,sz,f,i) 601 #else 602 #define l_sprintf(s,sz,f,i) ((void)(sz), sprintf(s,f,i)) 603 #endif 604 605 606 /* 607 @@ lua_strx2number converts a hexadecimal numeral to a number. 608 ** In C99, 'strtod' does that conversion. Otherwise, you can 609 ** leave 'lua_strx2number' undefined and Lua will provide its own 610 ** implementation. 611 */ 612 #if !defined(LUA_USE_C89) 613 #define lua_strx2number(s,p) lua_str2number(s,p) 614 #endif 615 616 617 /* 618 @@ lua_pointer2str converts a pointer to a readable string in a 619 ** non-specified way. 620 */ 621 #define lua_pointer2str(buff,sz,p) l_sprintf(buff,sz,"%p",p) 622 623 624 /* 625 @@ lua_number2strx converts a float to a hexadecimal numeral. 626 ** In C99, 'sprintf' (with format specifiers '%a'/'%A') does that. 627 ** Otherwise, you can leave 'lua_number2strx' undefined and Lua will 628 ** provide its own implementation. 629 */ 630 #if !defined(LUA_USE_C89) 631 #define lua_number2strx(L,b,sz,f,n) \ 632 ((void)L, l_sprintf(b,sz,f,(LUAI_UACNUMBER)(n))) 633 #endif 634 635 636 /* 637 ** 'strtof' and 'opf' variants for math functions are not valid in 638 ** C89. Otherwise, the macro 'HUGE_VALF' is a good proxy for testing the 639 ** availability of these variants. ('math.h' is already included in 640 ** all files that use these macros.) 641 */ 642 #if defined(LUA_USE_C89) || (defined(HUGE_VAL) && !defined(HUGE_VALF)) 643 #undef l_mathop /* variants not available */ 644 #undef lua_str2number 645 #define l_mathop(op) (lua_Number)op /* no variant */ 646 #define lua_str2number(s,p) ((lua_Number)strtod((s), (p))) 647 #endif 648 649 650 /* 651 @@ LUA_KCONTEXT is the type of the context ('ctx') for continuation 652 ** functions. It must be a numerical type; Lua will use 'intptr_t' if 653 ** available, otherwise it will use 'ptrdiff_t' (the nearest thing to 654 ** 'intptr_t' in C89) 655 */ 656 #define LUA_KCONTEXT ptrdiff_t 657 658 #if !defined(LUA_USE_C89) && defined(__STDC_VERSION__) && \ 659 __STDC_VERSION__ >= 199901L 660 #include <stdint.h> 661 #if defined(INTPTR_MAX) /* even in C99 this type is optional */ 662 #undef LUA_KCONTEXT 663 #define LUA_KCONTEXT intptr_t 664 #endif 665 #endif 666 667 668 /* 669 @@ lua_getlocaledecpoint gets the locale "radix character" (decimal point). 670 ** Change that if you do not want to use C locales. (Code using this 671 ** macro must include the header 'locale.h'.) 672 */ 673 #if !defined(lua_getlocaledecpoint) 674 #define lua_getlocaledecpoint() (localeconv()->decimal_point[0]) 675 #endif 676 677 /* }================================================================== */ 678 679 680 /* 681 ** {================================================================== 682 ** Language Variations 683 ** ===================================================================== 684 */ 685 686 /* 687 @@ LUA_NOCVTN2S/LUA_NOCVTS2N control how Lua performs some 688 ** coercions. Define LUA_NOCVTN2S to turn off automatic coercion from 689 ** numbers to strings. Define LUA_NOCVTS2N to turn off automatic 690 ** coercion from strings to numbers. 691 */ 692 /* #define LUA_NOCVTN2S */ 693 /* #define LUA_NOCVTS2N */ 694 695 696 /* 697 @@ LUA_USE_APICHECK turns on several consistency checks on the C API. 698 ** Define it as a help when debugging C code. 699 */ 700 #if defined(LUA_USE_APICHECK) 701 #include <assert.h> 702 #define luai_apicheck(l,e) assert(e) 703 #endif 704 705 /* }================================================================== */ 706 707 708 /* 709 ** {================================================================== 710 ** Macros that affect the API and must be stable (that is, must be the 711 ** same when you compile Lua and when you compile code that links to 712 ** Lua). 713 ** ===================================================================== 714 */ 715 716 /* 717 @@ LUAI_MAXSTACK limits the size of the Lua stack. 718 ** CHANGE it if you need a different limit. This limit is arbitrary; 719 ** its only purpose is to stop Lua from consuming unlimited stack 720 ** space (and to reserve some numbers for pseudo-indices). 721 ** (It must fit into max(size_t)/32.) 722 */ 723 #if LUAI_IS32INT 724 #define LUAI_MAXSTACK 1000000 725 #else 726 #define LUAI_MAXSTACK 15000 727 #endif 728 729 730 /* 731 @@ LUA_EXTRASPACE defines the size of a raw memory area associated with 732 ** a Lua state with very fast access. 733 ** CHANGE it if you need a different size. 734 */ 735 #define LUA_EXTRASPACE (sizeof(void *)) 736 737 738 /* 739 @@ LUA_IDSIZE gives the maximum size for the description of the source 740 @@ of a function in debug information. 741 ** CHANGE it if you want a different size. 742 */ 743 #define LUA_IDSIZE 60 744 745 746 /* 747 @@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system. 748 */ 749 #define LUAL_BUFFERSIZE ((int)(16 * sizeof(void*) * sizeof(lua_Number))) 750 751 752 /* 753 @@ LUAI_MAXALIGN defines fields that, when used in a union, ensure 754 ** maximum alignment for the other items in that union. 755 */ 756 #define LUAI_MAXALIGN lua_Number n; double u; void *s; lua_Integer i; long l 757 758 /* }================================================================== */ 759 760 761 762 763 764 /* =================================================================== */ 765 766 /* 767 ** Local configuration. You can use this space to add your redefinitions 768 ** without modifying the main part of the file. 769 */ 770 771 772 773 774 775 #endif 776 777