/* ** $Id: luaconf.h,v 1.115 2009/11/19 19:06:52 roberto Exp roberto $ ** Configuration file for Lua ** See Copyright Notice in lua.h */ #ifndef lconfig_h #define lconfig_h #include #include /* ** ================================================================== ** Search for "@@" to find all configurable definitions. ** =================================================================== */ /* @@ LUA_ANSI controls the use of non-ansi features. ** CHANGE it (define it) if you want Lua to avoid the use of any ** non-ansi feature or library. */ #if !defined(LUA_ANSI) && defined(__STRICT_ANSI__) #define LUA_ANSI #endif #if !defined(LUA_ANSI) && defined(_WIN32) #define LUA_WIN #endif #if defined(LUA_WIN) #include #endif #if defined(LUA_USE_LINUX) #define LUA_USE_POSIX #define LUA_USE_DLOPEN /* needs an extra library: -ldl */ #define LUA_USE_READLINE /* needs some extra libraries */ #endif #if defined(LUA_USE_MACOSX) #define LUA_USE_POSIX #define LUA_DL_DYLD /* does not need extra library */ #endif /* @@ LUA_USE_POSIX includes all functionallity listed as X/Open System @* Interfaces Extension (XSI). ** CHANGE it (define it) if your system is XSI compatible. */ #if defined(LUA_USE_POSIX) #define LUA_USE_MKSTEMP #define LUA_USE_ISATTY #define LUA_USE_POPEN #define LUA_USE_ULONGJMP #endif /* @@ LUA_PATH and LUA_CPATH are the names of the environment variables that @* Lua check to set its paths. @@ LUA_INIT is the name of the environment variable that Lua @* checks for initialization code. ** CHANGE them if you want different names. */ #define LUA_PATH "LUA_PATH" #define LUA_CPATH "LUA_CPATH" #define LUA_INIT "LUA_INIT" /* @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for @* Lua libraries. @@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for @* C libraries. ** CHANGE them if your machine has a non-conventional directory ** hierarchy or if you want to install your libraries in ** non-conventional directories. */ #if defined(_WIN32) /* ** In Windows, any exclamation mark ('!') in the path is replaced by the ** path of the directory of the executable file of the current process. */ #define LUA_LDIR "!\\lua\\" #define LUA_CDIR "!\\" #define LUA_PATH_DEFAULT \ LUA_LDIR"?.lua;" LUA_LDIR"?\\init.lua;" \ LUA_CDIR"?.lua;" LUA_CDIR"?\\init.lua;" ".\\?.lua" #define LUA_CPATH_DEFAULT \ LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll;" ".\\?.dll" #else #define LUA_ROOT "/usr/local/" #define LUA_LDIR LUA_ROOT "share/lua/5.1/" #define LUA_CDIR LUA_ROOT "lib/lua/5.1/" #define LUA_PATH_DEFAULT \ LUA_LDIR"?.lua;" LUA_LDIR"?/init.lua;" \ LUA_CDIR"?.lua;" LUA_CDIR"?/init.lua;" "./?.lua" #define LUA_CPATH_DEFAULT \ LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" "./?.so" #endif /* @@ LUA_DIRSEP is the directory separator (for submodules). ** CHANGE it if your machine does not use "/" as the directory separator ** and is not Windows. (On Windows Lua automatically uses "\".) */ #if defined(_WIN32) #define LUA_DIRSEP "\\" #else #define LUA_DIRSEP "/" #endif /* @@ LUA_PATHSEP is the character that separates templates in a path. @@ LUA_PATH_MARK is the string that marks the substitution points in a @* template. @@ LUA_EXECDIR in a Windows path is replaced by the executable's @* directory. @@ LUA_IGMARK is a mark to ignore all before it when bulding the @* luaopen_ function name. ** CHANGE them if for some reason your system cannot use those ** characters. (E.g., if one of those characters is a common character ** in file/directory names.) Probably you do not need to change them. */ #define LUA_PATHSEP ";" #define LUA_PATH_MARK "?" #define LUA_EXECDIR "!" #define LUA_IGMARK "-" /* @@ LUA_API is a mark for all core API functions. @@ LUALIB_API is a mark for all auxiliary library functions. @@ LUAMOD_API is a mark for all standard library opening functions. ** CHANGE them if you need to define those functions in some special way. ** For instance, if you want to create one Windows DLL with the core and ** the libraries, you may want to use the following definition (define ** LUA_BUILD_AS_DLL to get it). */ #if defined(LUA_BUILD_AS_DLL) #if defined(LUA_CORE) || defined(LUA_LIB) #define LUA_API __declspec(dllexport) #else #define LUA_API __declspec(dllimport) #endif #else #define LUA_API extern #endif /* more often than not the libs go together with the core */ #define LUALIB_API LUA_API #define LUAMOD_API LUALIB_API /* @@ LUAI_FUNC is a mark for all extern functions that are not to be @* exported to outside modules. @@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables @* that are not to be exported to outside modules (LUAI_DDEF for @* definitions and LUAI_DDEC for declarations). ** CHANGE them if you need to mark them in some special way. Elf/gcc ** (versions 3.2 and later) mark them as "hidden" to optimize access ** when Lua is compiled as a shared library. Not all elf targets support ** this attribute. Unfortunately, gcc does not offer a way to check ** whether the target offers that support, and those without support ** give a warning about it. To avoid these warnings, change to the ** default definition. */ #if defined(luaall_c) #define LUAI_FUNC static #define LUAI_DDEC static #define LUAI_DDEF static #elif defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \ defined(__ELF__) #define LUAI_FUNC __attribute__((visibility("hidden"))) extern #define LUAI_DDEC LUAI_FUNC #define LUAI_DDEF /* empty */ #else #define LUAI_FUNC extern #define LUAI_DDEC extern #define LUAI_DDEF /* empty */ #endif /* @@ LUA_QL describes how error messages quote program elements. ** CHANGE it if you want a different appearance. */ #define LUA_QL(x) "'" x "'" #define LUA_QS LUA_QL("%s") /* @@ LUA_IDSIZE gives the maximum size for the description of the source @* of a function in debug information. ** CHANGE it if you want a different size. */ #define LUA_IDSIZE 60 /* @@ luai_writestring defines how 'print' prints its results. ** CHANGE it if your system does not have a useful stdout. */ #define luai_writestring(s,l) fwrite((s), sizeof(char), (l), stdout) /* ** {================================================================== ** Stand-alone configuration ** =================================================================== */ #if defined(lua_c) || defined(luaall_c) /* @@ lua_stdin_is_tty detects whether the standard input is a 'tty' (that @* is, whether we're running lua interactively). ** CHANGE it if you have a better definition for non-POSIX/non-Windows ** systems. */ #if defined(LUA_USE_ISATTY) #include #define lua_stdin_is_tty() isatty(0) #elif defined(LUA_WIN) #include #include #define lua_stdin_is_tty() _isatty(_fileno(stdin)) #else #define lua_stdin_is_tty() 1 /* assume stdin is a tty */ #endif /* @@ LUA_PROMPT is the default prompt used by stand-alone Lua. @@ LUA_PROMPT2 is the default continuation prompt used by stand-alone Lua. ** CHANGE them if you want different prompts. (You can also change the ** prompts dynamically, assigning to globals _PROMPT/_PROMPT2.) */ #define LUA_PROMPT "> " #define LUA_PROMPT2 ">> " /* @@ LUA_PROGNAME is the default name for the stand-alone Lua program. ** CHANGE it if your stand-alone interpreter has a different name and ** your system is not able to detect that name automatically. */ #define LUA_PROGNAME "lua" /* @@ LUA_MAXINPUT is the maximum length for an input line in the @* stand-alone interpreter. ** CHANGE it if you need longer lines. */ #define LUA_MAXINPUT 512 /* @@ lua_readline defines how to show a prompt and then read a line from @* the standard input. @@ lua_saveline defines how to "save" a read line in a "history". @@ lua_freeline defines how to free a line read by lua_readline. ** CHANGE them if you want to improve/adapt this functionality. */ #if defined(LUA_USE_READLINE) #include #include #include #define lua_readline(L,b,p) ((void)L, ((b)=readline(p)) != NULL) #define lua_saveline(L,idx) \ if (lua_objlen(L,idx) > 0) /* non-empty line? */ \ add_history(lua_tostring(L, idx)); /* add it to history */ #define lua_freeline(L,b) ((void)L, free(b)) #else #define lua_readline(L,b,p) \ ((void)L, fputs(p, stdout), fflush(stdout), /* show prompt */ \ fgets(b, LUA_MAXINPUT, stdin) != NULL) /* get line */ #define lua_saveline(L,idx) { (void)L; (void)idx; } #define lua_freeline(L,b) { (void)L; (void)b; } #endif #endif /* }================================================================== */ /* @@ LUAI_GCPAUSE defines the default pause between garbage-collector cycles @* as a percentage. ** CHANGE it if you want the GC to run faster or slower (higher values ** mean larger pauses which mean slower collection.) You can also change ** this value dynamically. */ #define LUAI_GCPAUSE 162 /* 162% (wait memory to double before next GC) */ /* @@ LUAI_GCMUL defines the default speed of garbage collection relative to @* memory allocation as a percentage. ** CHANGE it if you want to change the granularity of the garbage ** collection. (Higher values mean coarser collections. 0 represents ** infinity, where each step performs a full collection.) You can also ** change this value dynamically. */ #define LUAI_GCMUL 200 /* GC runs 'twice the speed' of memory allocation */ /* ** {================================================================== ** Compatibility with previous versions ** =================================================================== */ /* @@ LUA_COMPAT_FENV controls de presence of functions 'setfenv/getfenv'. ** CHANGE it (undefine it) if as soon as you rewrite your code to ** avoid using those functions. (You can replace them with lexical ** environments, 'loadin', or the debug library.) */ /* #define LUA_COMPAT_FENV */ /* @@ LUA_COMPAT_LOG10 defines the function 'log10' in the math library. ** CHANGE it (undefine it) if as soon as you rewrite all calls 'log10(x)' ** as 'log(x, 10)' */ #define LUA_COMPAT_LOG10 /* @@ LUA_COMPAT_API includes some macros and functions that supply some @* compatibility with previous versions. ** CHANGE it (undefine it) if you do not need these compatibility facilities. */ #define LUA_COMPAT_API /* @@ LUA_COMPAT_GFIND controls compatibility with old 'string.gfind' name. ** CHANGE it to undefined as soon as you rename 'string.gfind' to ** 'string.gmatch'. */ #define LUA_COMPAT_GFIND /* @@ LUA_COMPAT_DEBUGLIB controls compatibility with preloading @* the debug library. ** CHANGE it to undefined as soon as you add 'require"debug"' everywhere ** you need the debug library. */ #define LUA_COMPAT_DEBUGLIB /* }================================================================== */ /* @@ luai_apicheck is the assert macro used by the Lua-C API. ** CHANGE luai_apicheck if you want Lua to perform some checks in the ** parameters it gets from API calls. This may slow down the interpreter ** a bit, but may be quite useful when debugging C code that interfaces ** with Lua. A useful redefinition is to use assert.h. */ #if defined(LUA_USE_APICHECK) #include #define luai_apicheck(L,o) { (void)L; assert(o); } #else #define luai_apicheck(L,o) { (void)L; } #endif /* @@ LUAI_BITSINT defines the number of bits in an int. ** CHANGE here if Lua cannot automatically detect the number of bits of ** your machine. Probably you do not need to change this. */ /* avoid overflows in comparison */ #if INT_MAX-20 < 32760 #define LUAI_BITSINT 16 #elif INT_MAX > 2147483640L /* int has at least 32 bits */ #define LUAI_BITSINT 32 #else #error "you must define LUA_BITSINT with number of bits in an integer" #endif /* @@ LUA_INT32 is an signed integer with exactly 32 bits. @@ LUAI_UMEM is an unsigned integer big enough to count the total @* memory used by Lua. @@ LUAI_MEM is a signed integer big enough to count the total memory @* used by Lua. ** CHANGE here if for some weird reason the default definitions are not ** good enough for your machine. Probably you do not need to change ** this. */ #if LUAI_BITSINT >= 32 #define LUA_INT32 int #define LUAI_UMEM size_t #define LUAI_MEM ptrdiff_t #else /* 16-bit ints */ #define LUA_INT32 long #define LUAI_UMEM unsigned long #define LUAI_MEM long #endif /* @@ LUAI_MAXSTACK limits the size of the Lua stack. ** CHANGE it if you need a different limit. This limit is arbitrary; ** its only purpose is to stop Lua to consume unlimited stack ** space (and to reserve some numbers for pseudo-indices). */ #if LUAI_BITSINT >= 32 #define LUAI_MAXSTACK 1000000 #else #define LUAI_MAXSTACK 15000 #endif /* reserve some space for error handling */ #define LUAI_FIRSTPSEUDOIDX (-LUAI_MAXSTACK - 1000) /* ** {================================================================== ** CHANGE (to smaller values) the following definitions if your system ** has a small C stack. (Or you may want to change them to larger ** values if your system has a large C stack and these limits are ** too rigid for you.) Some of these constants control the size of ** stack-allocated arrays used by the compiler or the interpreter, while ** others limit the maximum number of recursive calls that the compiler ** or the interpreter can perform. Values too large may cause a C stack ** overflow for some forms of deep constructs. ** =================================================================== */ /* @@ LUAI_MAXCCALLS is the maximum depth for nested C calls (short) and @* syntactical nested non-terminals in a program. */ #define LUAI_MAXCCALLS 200 /* @@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system. */ #define LUAL_BUFFERSIZE BUFSIZ /* }================================================================== */ /* ** {================================================================== @@ LUA_NUMBER is the type of numbers in Lua. ** CHANGE the following definitions only if you want to build Lua ** with a number type different from double. You may also need to ** change lua_number2int & lua_number2integer. ** =================================================================== */ #define LUA_NUMBER_DOUBLE #define LUA_NUMBER double /* @@ LUAI_UACNUMBER is the result of an 'usual argument conversion' @* over a number. */ #define LUAI_UACNUMBER double /* @@ LUA_NUMBER_SCAN is the format for reading numbers. @@ LUA_NUMBER_FMT is the format for writing numbers. @@ lua_number2str converts a number to a string. @@ LUAI_MAXNUMBER2STR is maximum size of previous conversion. @@ lua_str2number converts a string to a number. */ #define LUA_NUMBER_SCAN "%lf" #define LUA_NUMBER_FMT "%.14g" #define lua_number2str(s,n) sprintf((s), LUA_NUMBER_FMT, (n)) #define LUAI_MAXNUMBER2STR 32 /* 16 digits, sign, point, and \0 */ #define lua_str2number(s,p) strtod((s), (p)) /* @@ The luai_num* macros define the primitive operations over numbers. */ /* the following operations need the math library */ #if defined(lobject_c) || defined(lvm_c) || defined(luaall_c) #include #define luai_nummod(L,a,b) ((a) - floor((a)/(b))*(b)) #define luai_numpow(L,a,b) (pow(a,b)) #endif /* these are quite standard operations */ #if defined(LUA_CORE) #define luai_numadd(L,a,b) ((a)+(b)) #define luai_numsub(L,a,b) ((a)-(b)) #define luai_nummul(L,a,b) ((a)*(b)) #define luai_numdiv(L,a,b) ((a)/(b)) #define luai_numunm(L,a) (-(a)) #define luai_numeq(a,b) ((a)==(b)) #define luai_numlt(L,a,b) ((a)<(b)) #define luai_numle(L,a,b) ((a)<=(b)) #define luai_numisnan(L,a) (!luai_numeq((a), (a))) #endif /* @@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger. ** CHANGE that if ptrdiff_t is not adequate on your machine. (On most ** machines, ptrdiff_t gives a good choice between int or long.) */ #define LUA_INTEGER ptrdiff_t /* @@ lua_number2int is a macro to convert lua_Number to int. @@ lua_number2integer is a macro to convert lua_Number to lUA_INTEGER. @@ lua_number2uint is a macro to convert a lua_Number to an unsigned @* LUA_INT32. @@ lua_uint2number is a macro to convert an unsigned LUA_INT32 @* to a lua_Number. ** CHANGE them if you know a faster way to convert a lua_Number to ** int (with any rounding method and without throwing errors) in your ** system. In Pentium machines, a naive typecast from double to int ** in C is extremely slow, so any alternative is worth trying. */ /* On a Pentium, resort to a trick */ #if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) && !defined(__SSE2__) && \ (defined(__i386) || defined (_M_IX86) || defined(__i386__)) /* On a Microsoft compiler, use assembler */ #if defined(_MSC_VER) #define lua_number2int(i,d) __asm fld d __asm fistp i #define lua_number2integer(i,n) lua_number2int(i, n) #else /* the next trick should work on any Pentium, but sometimes clashes with a DirectX idiosyncrasy */ union luai_Cast { double l_d; long l_l; }; #define lua_number2int(i,d) \ { volatile union luai_Cast u; u.l_d = (d) + 6755399441055744.0; (i) = u.l_l; } #define lua_number2integer(i,n) lua_number2int(i, n) #define lua_number2uint(i,n) lua_number2int(i, n) #endif #else /* this option always works, but may be slow */ #define lua_number2int(i,d) ((i)=(int)(d)) #define lua_number2integer(i,d) ((i)=(LUA_INTEGER)(d)) #define lua_number2uint(i,d) ((i)=(unsigned LUA_INT32)(d)) #endif /* on several machines, coercion from unsigned to double is too slow, so avoid that if possible */ #define lua_uint2number(u) \ ((LUA_INT32)(u) < 0 ? (lua_Number)(u) : (lua_Number)(LUA_INT32)(u)) /* @@ luai_hashnum is a macro do hash a lua_Number value into an integer. @* The hash must be deterministic and give reasonable values for @* both small and large values (outside the range of integers). @* It is used only in ltable.c. */ #if defined(ltable_c) || defined(luaall_c) #include #include #define luai_hashnum(i,d) { int e; \ d = frexp(d, &e) * (lua_Number)(INT_MAX - DBL_MAX_EXP); \ lua_number2int(i, d); i += e; } #endif /* }================================================================== */ /* @@ LUAI_USER_ALIGNMENT_T is a type that requires maximum alignment. ** CHANGE it if your system requires alignments larger than double. (For ** instance, if your system supports long doubles and they must be ** aligned in 16-byte boundaries, then you should add long double in the ** union.) Probably you do not need to change this. */ #define LUAI_USER_ALIGNMENT_T union { double u; void *s; long l; } /* @@ LUAI_THROW/LUAI_TRY define how Lua does exception handling. ** CHANGE them if you prefer to use longjmp/setjmp even with C++ ** or if want/don't to use _longjmp/_setjmp instead of regular ** longjmp/setjmp. By default, Lua handles errors with exceptions when ** compiling as C++ code, with _longjmp/_setjmp when asked to use them, ** and with longjmp/setjmp otherwise. */ #if defined(__cplusplus) /* C++ exceptions */ #define LUAI_THROW(L,c) throw(c) #define LUAI_TRY(L,c,a) try { a } catch(...) \ { if ((c)->status == 0) (c)->status = -1; } #define luai_jmpbuf int /* dummy variable */ #elif defined(LUA_USE_ULONGJMP) /* in Unix, try _longjmp/_setjmp (more efficient) */ #define LUAI_THROW(L,c) _longjmp((c)->b, 1) #define LUAI_TRY(L,c,a) if (_setjmp((c)->b) == 0) { a } #define luai_jmpbuf jmp_buf #else /* default handling with long jumps */ #define LUAI_THROW(L,c) longjmp((c)->b, 1) #define LUAI_TRY(L,c,a) if (setjmp((c)->b) == 0) { a } #define luai_jmpbuf jmp_buf #endif /* @@ LUA_MAXCAPTURES is the maximum number of captures that a pattern @* can do during pattern-matching. ** CHANGE it if you need more captures. This limit is arbitrary. */ #define LUA_MAXCAPTURES 32 /* @@ lua_tmpnam is the function that the OS library uses to create a @* temporary name. @@ LUA_TMPNAMBUFSIZE is the maximum size of a name created by lua_tmpnam. ** CHANGE them if you have an alternative to tmpnam (which is considered ** insecure) or if you want the original tmpnam anyway. By default, Lua ** uses tmpnam except when POSIX is available, where it uses mkstemp. */ #if defined(loslib_c) || defined(luaall_c) #if defined(LUA_USE_MKSTEMP) #include #define LUA_TMPNAMBUFSIZE 32 #define lua_tmpnam(b,e) { \ strcpy(b, "/tmp/lua_XXXXXX"); \ e = mkstemp(b); \ if (e != -1) close(e); \ e = (e == -1); } #else #define LUA_TMPNAMBUFSIZE L_tmpnam #define lua_tmpnam(b,e) { e = (tmpnam(b) == NULL); } #endif #endif /* @@ LUA_STRFTIMEOPTIONS is the list of valid conversion specifiers @* for the 'strftime' function; ** CHANGE it if you want to use non-ansi options specific to your system. */ #if !defined(LUA_USE_POSIX) #define LUA_STRFTIMEOPTIONS "aAbBcdHIjmMpSUwWxXyYz%", "" #else #define LUA_STRFTIMEOPTIONS "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%", "", \ "E", "cCxXyY", \ "O", "deHImMSuUVwWy" #endif /* @@ lua_popen spawns a new process connected to the current one through @* the file streams. ** CHANGE it if you have a way to implement it in your system. */ #if defined(LUA_USE_POPEN) #define lua_popen(L,c,m) ((void)L, fflush(NULL), popen(c,m)) #define lua_pclose(L,file) ((void)L, pclose(file)) #elif defined(LUA_WIN) #define lua_popen(L,c,m) ((void)L, _popen(c,m)) #define lua_pclose(L,file) ((void)L, _pclose(file)) #else #define lua_popen(L,c,m) ((void)((void)c, m), \ luaL_error(L, LUA_QL("popen") " not supported"), (FILE*)0) #define lua_pclose(L,file) ((void)((void)L, file), -1) #endif /* @@ LUA_DL_* define which dynamic-library system Lua should use. ** CHANGE here if Lua has problems choosing the appropriate ** dynamic-library system for your platform (either Windows' DLL, Mac's ** dyld, or Unix's dlopen). If your system is some kind of Unix, there ** is a good chance that it has dlopen, so LUA_DL_DLOPEN will work for ** it. To use dlopen you also need to adapt the src/Makefile (probably ** adding -ldl to the linker options), so Lua does not select it ** automatically. (When you change the makefile to add -ldl, you must ** also add -DLUA_USE_DLOPEN.) ** If you do not want any kind of dynamic library, undefine all these ** options. ** By default, _WIN32 gets LUA_DL_DLL and MAC OS X gets LUA_DL_DYLD. */ #if defined(LUA_USE_DLOPEN) #define LUA_DL_DLOPEN #endif #if defined(LUA_WIN) #define LUA_DL_DLL #endif /* @@ LUAI_EXTRASPACE allows you to add user-specific data in a lua_State @* (the data goes just *before* the lua_State pointer). ** CHANGE (define) this if you really need that. This value must be ** a multiple of the maximum alignment required for your machine. */ #define LUAI_EXTRASPACE 0 /* @@ luai_userstate* allow user-specific actions on threads. ** CHANGE them if you defined LUAI_EXTRASPACE and need to do something ** extra when a thread is created/deleted/resumed/yielded. */ #define luai_userstateopen(L) ((void)L) #define luai_userstateclose(L) ((void)L) #define luai_userstatethread(L,L1) ((void)L) #define luai_userstatefree(L) ((void)L) #define luai_userstateresume(L,n) ((void)L) #define luai_userstateyield(L,n) ((void)L) /* @@ LUA_INTFRMLEN is the length modifier for integer conversions @* in 'string.format'. @@ LUA_INTFRM_T is the integer type corresponding to the previous length @* modifier. ** CHANGE them if your system supports long long or does not support long. */ #if defined(LUA_USELONGLONG) #define LUA_INTFRMLEN "ll" #define LUA_INTFRM_T long long #else #define LUA_INTFRMLEN "l" #define LUA_INTFRM_T long #endif /* =================================================================== */ /* ** Local configuration. You can use this space to add your redefinitions ** without modifying the main part of the file. */ #endif