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