1 /* $FreeBSD$ */ 2 /* 3 ** $Id: luaconf.h,v 1.259.1.1 2017/04/19 17:29:57 roberto Exp $ 4 ** Configuration file for Lua 5 ** See Copyright Notice in lua.h 6 */ 7 8 9 #ifndef luaconf_h 10 #define luaconf_h 11 12 #include <limits.h> 13 #include <stddef.h> 14 15 16 /* 17 ** =================================================================== 18 ** Search for "@@" to find all configurable definitions. 19 ** =================================================================== 20 */ 21 22 23 /* 24 ** {==================================================================== 25 ** System Configuration: macros to adapt (if needed) Lua to some 26 ** particular platform, for instance compiling it with 32-bit numbers or 27 ** restricting it to C89. 28 ** ===================================================================== 29 */ 30 31 /* 32 @@ LUA_32BITS enables Lua with 32-bit integers and 32-bit floats. You 33 ** can also define LUA_32BITS in the make file, but changing here you 34 ** ensure that all software connected to Lua will be compiled with the 35 ** same configuration. 36 */ 37 /* #define LUA_32BITS */ 38 39 40 /* 41 @@ LUA_USE_C89 controls the use of non-ISO-C89 features. 42 ** Define it if you want Lua to avoid the use of a few C99 features 43 ** or Windows-specific features on Windows. 44 */ 45 /* #define LUA_USE_C89 */ 46 47 48 /* 49 ** By default, Lua on Windows use (some) specific Windows features 50 */ 51 #if !defined(LUA_USE_C89) && defined(_WIN32) && !defined(_WIN32_WCE) 52 #define LUA_USE_WINDOWS /* enable goodies for regular Windows */ 53 #endif 54 55 56 #if defined(LUA_USE_WINDOWS) 57 #define LUA_DL_DLL /* enable support for DLL */ 58 #define LUA_USE_C89 /* broadly, Windows is C89 */ 59 #endif 60 61 62 #if defined(LUA_USE_LINUX) 63 #define LUA_USE_POSIX 64 #define LUA_USE_DLOPEN /* needs an extra library: -ldl */ 65 #define LUA_USE_READLINE /* needs some extra libraries */ 66 #endif 67 68 69 #if defined(LUA_USE_MACOSX) 70 #define LUA_USE_POSIX 71 #define LUA_USE_DLOPEN /* MacOS does not need -ldl */ 72 #define LUA_USE_READLINE /* needs an extra library: -lreadline */ 73 #endif 74 75 /* Local modifications: need io.popen */ 76 #ifdef __FreeBSD__ 77 #define LUA_USE_POSIX 78 #ifndef BOOTSTRAPPING 79 #define LUA_USE_DLOPEN 80 #endif 81 #endif 82 83 /* 84 @@ LUA_C89_NUMBERS ensures that Lua uses the largest types available for 85 ** C89 ('long' and 'double'); Windows always has '__int64', so it does 86 ** not need to use this case. 87 */ 88 #if defined(LUA_USE_C89) && !defined(LUA_USE_WINDOWS) 89 #define LUA_C89_NUMBERS 90 #endif 91 92 93 94 /* 95 @@ LUAI_BITSINT defines the (minimum) number of bits in an 'int'. 96 */ 97 /* avoid undefined shifts */ 98 #if ((INT_MAX >> 15) >> 15) >= 1 99 #define LUAI_BITSINT 32 100 #else 101 /* 'int' always must have at least 16 bits */ 102 #define LUAI_BITSINT 16 103 #endif 104 105 106 /* 107 @@ LUA_INT_TYPE defines the type for Lua integers. 108 @@ LUA_FLOAT_TYPE defines the type for Lua floats. 109 ** Lua should work fine with any mix of these options (if supported 110 ** by your C compiler). The usual configurations are 64-bit integers 111 ** and 'double' (the default), 32-bit integers and 'float' (for 112 ** restricted platforms), and 'long'/'double' (for C compilers not 113 ** compliant with C99, which may not have support for 'long long'). 114 */ 115 116 /* predefined options for LUA_INT_TYPE */ 117 #define LUA_INT_INT 1 118 #define LUA_INT_LONG 2 119 #define LUA_INT_LONGLONG 3 120 121 /* predefined options for LUA_FLOAT_TYPE */ 122 #define LUA_FLOAT_FLOAT 1 123 #define LUA_FLOAT_DOUBLE 2 124 #define LUA_FLOAT_LONGDOUBLE 3 125 126 #if defined(LUA_32BITS) /* { */ 127 /* 128 ** 32-bit integers and 'float' 129 */ 130 #if LUAI_BITSINT >= 32 /* use 'int' if big enough */ 131 #define LUA_INT_TYPE LUA_INT_INT 132 #else /* otherwise use 'long' */ 133 #define LUA_INT_TYPE LUA_INT_LONG 134 #endif 135 #define LUA_FLOAT_TYPE LUA_FLOAT_FLOAT 136 137 #elif defined(LUA_C89_NUMBERS) /* }{ */ 138 /* 139 ** largest types available for C89 ('long' and 'double') 140 */ 141 #define LUA_INT_TYPE LUA_INT_LONG 142 #define LUA_FLOAT_TYPE LUA_FLOAT_DOUBLE 143 144 #endif /* } */ 145 146 147 /* 148 ** default configuration for 64-bit Lua ('long long' and 'double') 149 */ 150 #if !defined(LUA_INT_TYPE) 151 #define LUA_INT_TYPE LUA_INT_LONGLONG 152 #endif 153 154 #if !defined(LUA_FLOAT_TYPE) 155 #define LUA_FLOAT_TYPE LUA_FLOAT_DOUBLE 156 #endif 157 158 /* }================================================================== */ 159 160 161 162 163 /* 164 ** {================================================================== 165 ** Configuration for Paths. 166 ** =================================================================== 167 */ 168 169 /* 170 ** LUA_PATH_SEP is the character that separates templates in a path. 171 ** LUA_PATH_MARK is the string that marks the substitution points in a 172 ** template. 173 ** LUA_EXEC_DIR in a Windows path is replaced by the executable's 174 ** directory. 175 */ 176 #define LUA_PATH_SEP ";" 177 #define LUA_PATH_MARK "?" 178 #define LUA_EXEC_DIR "!" 179 180 181 /* 182 @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for 183 ** Lua libraries. 184 @@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for 185 ** C libraries. 186 ** CHANGE them if your machine has a non-conventional directory 187 ** hierarchy or if you want to install your libraries in 188 ** non-conventional directories. 189 */ 190 #define LUA_VDIR LUA_VERSION_MAJOR "." LUA_VERSION_MINOR 191 #if defined(_WIN32) /* { */ 192 /* 193 ** In Windows, any exclamation mark ('!') in the path is replaced by the 194 ** path of the directory of the executable file of the current process. 195 */ 196 #define LUA_LDIR "!\\lua\\" 197 #define LUA_CDIR "!\\" 198 #define LUA_SHRDIR "!\\..\\share\\lua\\" LUA_VDIR "\\" 199 #define LUA_PATH_DEFAULT \ 200 LUA_LDIR"?.lua;" LUA_LDIR"?\\init.lua;" \ 201 LUA_CDIR"?.lua;" LUA_CDIR"?\\init.lua;" \ 202 LUA_SHRDIR"?.lua;" LUA_SHRDIR"?\\init.lua;" \ 203 ".\\?.lua;" ".\\?\\init.lua" 204 #define LUA_CPATH_DEFAULT \ 205 LUA_CDIR"?.dll;" \ 206 LUA_CDIR"..\\lib\\lua\\" LUA_VDIR "\\?.dll;" \ 207 LUA_CDIR"loadall.dll;" ".\\?.dll" 208 209 #else /* }{ */ 210 211 #define LUA_ROOT "/usr/" 212 #define LUA_LDIR LUA_ROOT "share/flua/" 213 #define LUA_CDIR LUA_ROOT "lib/flua/" 214 #if !defined(LUA_PATH_DEFAULT) 215 #define LUA_PATH_DEFAULT \ 216 LUA_LDIR"?.lua;" LUA_LDIR"?/init.lua;" \ 217 LUA_CDIR"?.lua;" LUA_CDIR"?/init.lua;" \ 218 "./?.lua;" "./?/init.lua" 219 #endif 220 #if !defined(LUA_CPATH_DEFAULT) 221 #define LUA_CPATH_DEFAULT \ 222 LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" "./?.so" 223 #endif 224 #endif /* } */ 225 226 227 /* 228 @@ LUA_DIRSEP is the directory separator (for submodules). 229 ** CHANGE it if your machine does not use "/" as the directory separator 230 ** and is not Windows. (On Windows Lua automatically uses "\".) 231 */ 232 #if defined(_WIN32) 233 #define LUA_DIRSEP "\\" 234 #else 235 #define LUA_DIRSEP "/" 236 #endif 237 238 /* }================================================================== */ 239 240 241 /* 242 ** {================================================================== 243 ** Marks for exported symbols in the C code 244 ** =================================================================== 245 */ 246 247 /* 248 @@ LUA_API is a mark for all core API functions. 249 @@ LUALIB_API is a mark for all auxiliary library functions. 250 @@ LUAMOD_API is a mark for all standard library opening functions. 251 ** CHANGE them if you need to define those functions in some special way. 252 ** For instance, if you want to create one Windows DLL with the core and 253 ** the libraries, you may want to use the following definition (define 254 ** LUA_BUILD_AS_DLL to get it). 255 */ 256 #if defined(LUA_BUILD_AS_DLL) /* { */ 257 258 #if defined(LUA_CORE) || defined(LUA_LIB) /* { */ 259 #define LUA_API __declspec(dllexport) 260 #else /* }{ */ 261 #define LUA_API __declspec(dllimport) 262 #endif /* } */ 263 264 #else /* }{ */ 265 266 #define LUA_API extern 267 268 #endif /* } */ 269 270 271 /* more often than not the libs go together with the core */ 272 #define LUALIB_API LUA_API 273 #define LUAMOD_API LUALIB_API 274 275 276 /* 277 @@ LUAI_FUNC is a mark for all extern functions that are not to be 278 ** exported to outside modules. 279 @@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables 280 ** that are not to be exported to outside modules (LUAI_DDEF for 281 ** definitions and LUAI_DDEC for declarations). 282 ** CHANGE them if you need to mark them in some special way. Elf/gcc 283 ** (versions 3.2 and later) mark them as "hidden" to optimize access 284 ** when Lua is compiled as a shared library. Not all elf targets support 285 ** this attribute. Unfortunately, gcc does not offer a way to check 286 ** whether the target offers that support, and those without support 287 ** give a warning about it. To avoid these warnings, change to the 288 ** default definition. 289 */ 290 #if defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \ 291 defined(__ELF__) /* { */ 292 #define LUAI_FUNC __attribute__((visibility("hidden"))) extern 293 #else /* }{ */ 294 #define LUAI_FUNC extern 295 #endif /* } */ 296 297 #define LUAI_DDEC LUAI_FUNC 298 #define LUAI_DDEF /* empty */ 299 300 /* }================================================================== */ 301 302 303 /* 304 ** {================================================================== 305 ** Compatibility with previous versions 306 ** =================================================================== 307 */ 308 309 /* 310 @@ LUA_COMPAT_5_2 controls other macros for compatibility with Lua 5.2. 311 @@ LUA_COMPAT_5_1 controls other macros for compatibility with Lua 5.1. 312 ** You can define it to get all options, or change specific options 313 ** to fit your specific needs. 314 */ 315 #if defined(LUA_COMPAT_5_2) /* { */ 316 317 /* 318 @@ LUA_COMPAT_MATHLIB controls the presence of several deprecated 319 ** functions in the mathematical library. 320 */ 321 #define LUA_COMPAT_MATHLIB 322 323 /* 324 @@ LUA_COMPAT_BITLIB controls the presence of library 'bit32'. 325 */ 326 #define LUA_COMPAT_BITLIB 327 328 /* 329 @@ LUA_COMPAT_IPAIRS controls the effectiveness of the __ipairs metamethod. 330 */ 331 #define LUA_COMPAT_IPAIRS 332 333 /* 334 @@ LUA_COMPAT_APIINTCASTS controls the presence of macros for 335 ** manipulating other integer types (lua_pushunsigned, lua_tounsigned, 336 ** luaL_checkint, luaL_checklong, etc.) 337 */ 338 #define LUA_COMPAT_APIINTCASTS 339 340 #endif /* } */ 341 342 343 #if defined(LUA_COMPAT_5_1) /* { */ 344 345 /* Incompatibilities from 5.2 -> 5.3 */ 346 #define LUA_COMPAT_MATHLIB 347 #define LUA_COMPAT_APIINTCASTS 348 349 /* 350 @@ LUA_COMPAT_UNPACK controls the presence of global 'unpack'. 351 ** You can replace it with 'table.unpack'. 352 */ 353 #define LUA_COMPAT_UNPACK 354 355 /* 356 @@ LUA_COMPAT_LOADERS controls the presence of table 'package.loaders'. 357 ** You can replace it with 'package.searchers'. 358 */ 359 #define LUA_COMPAT_LOADERS 360 361 /* 362 @@ macro 'lua_cpcall' emulates deprecated function lua_cpcall. 363 ** You can call your C function directly (with light C functions). 364 */ 365 #define lua_cpcall(L,f,u) \ 366 (lua_pushcfunction(L, (f)), \ 367 lua_pushlightuserdata(L,(u)), \ 368 lua_pcall(L,1,0,0)) 369 370 371 /* 372 @@ LUA_COMPAT_LOG10 defines the function 'log10' in the math library. 373 ** You can rewrite 'log10(x)' as 'log(x, 10)'. 374 */ 375 #define LUA_COMPAT_LOG10 376 377 /* 378 @@ LUA_COMPAT_LOADSTRING defines the function 'loadstring' in the base 379 ** library. You can rewrite 'loadstring(s)' as 'load(s)'. 380 */ 381 #define LUA_COMPAT_LOADSTRING 382 383 /* 384 @@ LUA_COMPAT_MAXN defines the function 'maxn' in the table library. 385 */ 386 #define LUA_COMPAT_MAXN 387 388 /* 389 @@ The following macros supply trivial compatibility for some 390 ** changes in the API. The macros themselves document how to 391 ** change your code to avoid using them. 392 */ 393 #define lua_strlen(L,i) lua_rawlen(L, (i)) 394 395 #define lua_objlen(L,i) lua_rawlen(L, (i)) 396 397 #define lua_equal(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPEQ) 398 #define lua_lessthan(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPLT) 399 400 /* 401 @@ LUA_COMPAT_MODULE controls compatibility with previous 402 ** module functions 'module' (Lua) and 'luaL_register' (C). 403 */ 404 #define LUA_COMPAT_MODULE 405 406 #endif /* } */ 407 408 409 /* 410 @@ LUA_COMPAT_FLOATSTRING makes Lua format integral floats without a 411 @@ a float mark ('.0'). 412 ** This macro is not on by default even in compatibility mode, 413 ** because this is not really an incompatibility. 414 */ 415 /* #define LUA_COMPAT_FLOATSTRING */ 416 417 /* }================================================================== */ 418 419 420 421 /* 422 ** {================================================================== 423 ** Configuration for Numbers. 424 ** Change these definitions if no predefined LUA_FLOAT_* / LUA_INT_* 425 ** satisfy your needs. 426 ** =================================================================== 427 */ 428 429 /* 430 @@ LUA_NUMBER is the floating-point type used by Lua. 431 @@ LUAI_UACNUMBER is the result of a 'default argument promotion' 432 @@ over a floating number. 433 @@ l_mathlim(x) corrects limit name 'x' to the proper float type 434 ** by prefixing it with one of FLT/DBL/LDBL. 435 @@ LUA_NUMBER_FRMLEN is the length modifier for writing floats. 436 @@ LUA_NUMBER_FMT is the format for writing floats. 437 @@ lua_number2str converts a float to a string. 438 @@ l_mathop allows the addition of an 'l' or 'f' to all math operations. 439 @@ l_floor takes the floor of a float. 440 @@ lua_str2number converts a decimal numeric string to a number. 441 */ 442 443 444 /* The following definitions are good for most cases here */ 445 446 #define l_floor(x) (l_mathop(floor)(x)) 447 448 #define lua_number2str(s,sz,n) \ 449 l_sprintf((s), sz, LUA_NUMBER_FMT, (LUAI_UACNUMBER)(n)) 450 451 /* 452 @@ lua_numbertointeger converts a float number to an integer, or 453 ** returns 0 if float is not within the range of a lua_Integer. 454 ** (The range comparisons are tricky because of rounding. The tests 455 ** here assume a two-complement representation, where MININTEGER always 456 ** has an exact representation as a float; MAXINTEGER may not have one, 457 ** and therefore its conversion to float may have an ill-defined value.) 458 */ 459 #define lua_numbertointeger(n,p) \ 460 ((n) >= (LUA_NUMBER)(LUA_MININTEGER) && \ 461 (n) < -(LUA_NUMBER)(LUA_MININTEGER) && \ 462 (*(p) = (LUA_INTEGER)(n), 1)) 463 464 465 /* now the variable definitions */ 466 467 #if LUA_FLOAT_TYPE == LUA_FLOAT_FLOAT /* { single float */ 468 469 #define LUA_NUMBER float 470 471 #define l_mathlim(n) (FLT_##n) 472 473 #define LUAI_UACNUMBER double 474 475 #define LUA_NUMBER_FRMLEN "" 476 #define LUA_NUMBER_FMT "%.7g" 477 478 #define l_mathop(op) op##f 479 480 #define lua_str2number(s,p) strtof((s), (p)) 481 482 483 #elif LUA_FLOAT_TYPE == LUA_FLOAT_LONGDOUBLE /* }{ long double */ 484 485 #define LUA_NUMBER long double 486 487 #define l_mathlim(n) (LDBL_##n) 488 489 #define LUAI_UACNUMBER long double 490 491 #define LUA_NUMBER_FRMLEN "L" 492 #define LUA_NUMBER_FMT "%.19Lg" 493 494 #define l_mathop(op) op##l 495 496 #define lua_str2number(s,p) strtold((s), (p)) 497 498 #elif LUA_FLOAT_TYPE == LUA_FLOAT_DOUBLE /* }{ double */ 499 500 #define LUA_NUMBER double 501 502 #define l_mathlim(n) (DBL_##n) 503 504 #define LUAI_UACNUMBER double 505 506 #define LUA_NUMBER_FRMLEN "" 507 #define LUA_NUMBER_FMT "%.14g" 508 509 #define l_mathop(op) op 510 511 #define lua_str2number(s,p) strtod((s), (p)) 512 513 #else /* }{ */ 514 515 #error "numeric float type not defined" 516 517 #endif /* } */ 518 519 520 521 /* 522 @@ LUA_INTEGER is the integer type used by Lua. 523 ** 524 @@ LUA_UNSIGNED is the unsigned version of LUA_INTEGER. 525 ** 526 @@ LUAI_UACINT is the result of a 'default argument promotion' 527 @@ over a lUA_INTEGER. 528 @@ LUA_INTEGER_FRMLEN is the length modifier for reading/writing integers. 529 @@ LUA_INTEGER_FMT is the format for writing integers. 530 @@ LUA_MAXINTEGER is the maximum value for a LUA_INTEGER. 531 @@ LUA_MININTEGER is the minimum value for a LUA_INTEGER. 532 @@ lua_integer2str converts an integer to a string. 533 */ 534 535 536 /* The following definitions are good for most cases here */ 537 538 #define LUA_INTEGER_FMT "%" LUA_INTEGER_FRMLEN "d" 539 540 #define LUAI_UACINT LUA_INTEGER 541 542 #define lua_integer2str(s,sz,n) \ 543 l_sprintf((s), sz, LUA_INTEGER_FMT, (LUAI_UACINT)(n)) 544 545 /* 546 ** use LUAI_UACINT here to avoid problems with promotions (which 547 ** can turn a comparison between unsigneds into a signed comparison) 548 */ 549 #define LUA_UNSIGNED unsigned LUAI_UACINT 550 551 552 /* now the variable definitions */ 553 554 #if LUA_INT_TYPE == LUA_INT_INT /* { int */ 555 556 #define LUA_INTEGER int 557 #define LUA_INTEGER_FRMLEN "" 558 559 #define LUA_MAXINTEGER INT_MAX 560 #define LUA_MININTEGER INT_MIN 561 562 #elif LUA_INT_TYPE == LUA_INT_LONG /* }{ long */ 563 564 #define LUA_INTEGER long 565 #define LUA_INTEGER_FRMLEN "l" 566 567 #define LUA_MAXINTEGER LONG_MAX 568 #define LUA_MININTEGER LONG_MIN 569 570 #elif LUA_INT_TYPE == LUA_INT_LONGLONG /* }{ long long */ 571 572 /* use presence of macro LLONG_MAX as proxy for C99 compliance */ 573 #if defined(LLONG_MAX) /* { */ 574 /* use ISO C99 stuff */ 575 576 #define LUA_INTEGER long long 577 #define LUA_INTEGER_FRMLEN "ll" 578 579 #define LUA_MAXINTEGER LLONG_MAX 580 #define LUA_MININTEGER LLONG_MIN 581 582 #elif defined(LUA_USE_WINDOWS) /* }{ */ 583 /* in Windows, can use specific Windows types */ 584 585 #define LUA_INTEGER __int64 586 #define LUA_INTEGER_FRMLEN "I64" 587 588 #define LUA_MAXINTEGER _I64_MAX 589 #define LUA_MININTEGER _I64_MIN 590 591 #else /* }{ */ 592 593 #error "Compiler does not support 'long long'. Use option '-DLUA_32BITS' \ 594 or '-DLUA_C89_NUMBERS' (see file 'luaconf.h' for details)" 595 596 #endif /* } */ 597 598 #else /* }{ */ 599 600 #error "numeric integer type not defined" 601 602 #endif /* } */ 603 604 /* }================================================================== */ 605 606 607 /* 608 ** {================================================================== 609 ** Dependencies with C99 and other C details 610 ** =================================================================== 611 */ 612 613 /* 614 @@ l_sprintf is equivalent to 'snprintf' or 'sprintf' in C89. 615 ** (All uses in Lua have only one format item.) 616 */ 617 #if !defined(LUA_USE_C89) 618 #define l_sprintf(s,sz,f,i) snprintf(s,sz,f,i) 619 #else 620 #define l_sprintf(s,sz,f,i) ((void)(sz), sprintf(s,f,i)) 621 #endif 622 623 624 /* 625 @@ lua_strx2number converts an hexadecimal numeric string to a number. 626 ** In C99, 'strtod' does that conversion. Otherwise, you can 627 ** leave 'lua_strx2number' undefined and Lua will provide its own 628 ** implementation. 629 */ 630 #if !defined(LUA_USE_C89) 631 #define lua_strx2number(s,p) lua_str2number(s,p) 632 #endif 633 634 635 /* 636 @@ lua_pointer2str converts a pointer to a readable string in a 637 ** non-specified way. 638 */ 639 #define lua_pointer2str(buff,sz,p) l_sprintf(buff,sz,"%p",p) 640 641 642 /* 643 @@ lua_number2strx converts a float to an hexadecimal numeric string. 644 ** In C99, 'sprintf' (with format specifiers '%a'/'%A') does that. 645 ** Otherwise, you can leave 'lua_number2strx' undefined and Lua will 646 ** provide its own implementation. 647 */ 648 #if !defined(LUA_USE_C89) 649 #define lua_number2strx(L,b,sz,f,n) \ 650 ((void)L, l_sprintf(b,sz,f,(LUAI_UACNUMBER)(n))) 651 #endif 652 653 654 /* 655 ** 'strtof' and 'opf' variants for math functions are not valid in 656 ** C89. Otherwise, the macro 'HUGE_VALF' is a good proxy for testing the 657 ** availability of these variants. ('math.h' is already included in 658 ** all files that use these macros.) 659 */ 660 #if defined(LUA_USE_C89) || (defined(HUGE_VAL) && !defined(HUGE_VALF)) 661 #undef l_mathop /* variants not available */ 662 #undef lua_str2number 663 #define l_mathop(op) (lua_Number)op /* no variant */ 664 #define lua_str2number(s,p) ((lua_Number)strtod((s), (p))) 665 #endif 666 667 668 /* 669 @@ LUA_KCONTEXT is the type of the context ('ctx') for continuation 670 ** functions. It must be a numerical type; Lua will use 'intptr_t' if 671 ** available, otherwise it will use 'ptrdiff_t' (the nearest thing to 672 ** 'intptr_t' in C89) 673 */ 674 #define LUA_KCONTEXT ptrdiff_t 675 676 #if !defined(LUA_USE_C89) && defined(__STDC_VERSION__) && \ 677 __STDC_VERSION__ >= 199901L 678 #include <stdint.h> 679 #if defined(INTPTR_MAX) /* even in C99 this type is optional */ 680 #undef LUA_KCONTEXT 681 #define LUA_KCONTEXT intptr_t 682 #endif 683 #endif 684 685 686 /* 687 @@ lua_getlocaledecpoint gets the locale "radix character" (decimal point). 688 ** Change that if you do not want to use C locales. (Code using this 689 ** macro must include header 'locale.h'.) 690 */ 691 #if !defined(lua_getlocaledecpoint) 692 #define lua_getlocaledecpoint() (localeconv()->decimal_point[0]) 693 #endif 694 695 /* }================================================================== */ 696 697 698 /* 699 ** {================================================================== 700 ** Language Variations 701 ** ===================================================================== 702 */ 703 704 /* 705 @@ LUA_NOCVTN2S/LUA_NOCVTS2N control how Lua performs some 706 ** coercions. Define LUA_NOCVTN2S to turn off automatic coercion from 707 ** numbers to strings. Define LUA_NOCVTS2N to turn off automatic 708 ** coercion from strings to numbers. 709 */ 710 /* #define LUA_NOCVTN2S */ 711 /* #define LUA_NOCVTS2N */ 712 713 714 /* 715 @@ LUA_USE_APICHECK turns on several consistency checks on the C API. 716 ** Define it as a help when debugging C code. 717 */ 718 #if defined(LUA_USE_APICHECK) 719 #include <assert.h> 720 #define luai_apicheck(l,e) assert(e) 721 #endif 722 723 /* }================================================================== */ 724 725 726 /* 727 ** {================================================================== 728 ** Macros that affect the API and must be stable (that is, must be the 729 ** same when you compile Lua and when you compile code that links to 730 ** Lua). You probably do not want/need to change them. 731 ** ===================================================================== 732 */ 733 734 /* 735 @@ LUAI_MAXSTACK limits the size of the Lua stack. 736 ** CHANGE it if you need a different limit. This limit is arbitrary; 737 ** its only purpose is to stop Lua from consuming unlimited stack 738 ** space (and to reserve some numbers for pseudo-indices). 739 */ 740 #if LUAI_BITSINT >= 32 741 #define LUAI_MAXSTACK 1000000 742 #else 743 #define LUAI_MAXSTACK 15000 744 #endif 745 746 747 /* 748 @@ LUA_EXTRASPACE defines the size of a raw memory area associated with 749 ** a Lua state with very fast access. 750 ** CHANGE it if you need a different size. 751 */ 752 #define LUA_EXTRASPACE (sizeof(void *)) 753 754 755 /* 756 @@ LUA_IDSIZE gives the maximum size for the description of the source 757 @@ of a function in debug information. 758 ** CHANGE it if you want a different size. 759 */ 760 #define LUA_IDSIZE 60 761 762 763 /* 764 @@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system. 765 ** CHANGE it if it uses too much C-stack space. (For long double, 766 ** 'string.format("%.99f", -1e4932)' needs 5034 bytes, so a 767 ** smaller buffer would force a memory allocation for each call to 768 ** 'string.format'.) 769 */ 770 #if LUA_FLOAT_TYPE == LUA_FLOAT_LONGDOUBLE 771 #define LUAL_BUFFERSIZE 8192 772 #else 773 #define LUAL_BUFFERSIZE ((int)(0x80 * sizeof(void*) * sizeof(lua_Integer))) 774 #endif 775 776 /* }================================================================== */ 777 778 779 /* 780 @@ LUA_QL describes how error messages quote program elements. 781 ** Lua does not use these macros anymore; they are here for 782 ** compatibility only. 783 */ 784 #define LUA_QL(x) "'" x "'" 785 #define LUA_QS LUA_QL("%s") 786 787 788 789 790 /* =================================================================== */ 791 792 /* 793 ** Local configuration. You can use this space to add your redefinitions 794 ** without modifying the main part of the file. 795 */ 796 797 798 799 800 801 #endif 802 803