Lua 5.1.4: luaconf.h


L0001    /*
L0002    ** $Id: luaconf.h,v 1.82.1.7 2008/02/11 16:25:08 roberto Exp $
L0003    ** Configuration file for Lua
L0004    ** See Copyright Notice in lua.h
L0005    */
L0006    
L0007    
L0008    #ifndef lconfig_h
L0009    #define lconfig_h
L0010    
L0011    #include <limits.h>
L0012    #include <stddef.h>
L0013    
L0014    
L0015    /*
L0016    ** ==================================================================
L0017    ** Search for "@@" to find all configurable definitions.
L0018    ** ===================================================================
L0019    */
L0020    
L0021    
L0022    /*
L0023    @@ LUA_ANSI controls the use of non-ansi features.
L0024    ** CHANGE it (define it) if you want Lua to avoid the use of any
L0025    ** non-ansi feature or library.
L0026    */
L0027    #if defined(__STRICT_ANSI__)
L0028    #define LUA_ANSI
L0029    #endif
L0030    
L0031    
L0032    #if !defined(LUA_ANSI) && defined(_WIN32)
L0033    #define LUA_WIN
L0034    #endif
L0035    
L0036    #if defined(LUA_USE_LINUX)
L0037    #define LUA_USE_POSIX
L0038    #define LUA_USE_DLOPEN		/* needs an extra library: -ldl */
L0039    #define LUA_USE_READLINE	/* needs some extra libraries */
L0040    #endif
L0041    
L0042    #if defined(LUA_USE_MACOSX)
L0043    #define LUA_USE_POSIX
L0044    #define LUA_DL_DYLD		/* does not need extra library */
L0045    #endif
L0046    
L0047    
L0048    
L0049    /*
L0050    @@ LUA_USE_POSIX includes all functionallity listed as X/Open System
L0051    @* Interfaces Extension (XSI).
L0052    ** CHANGE it (define it) if your system is XSI compatible.
L0053    */
L0054    #if defined(LUA_USE_POSIX)
L0055    #define LUA_USE_MKSTEMP
L0056    #define LUA_USE_ISATTY
L0057    #define LUA_USE_POPEN
L0058    #define LUA_USE_ULONGJMP
L0059    #endif
L0060    
L0061    
L0062    /*
L0063    @@ LUA_PATH and LUA_CPATH are the names of the environment variables that
L0064    @* Lua check to set its paths.
L0065    @@ LUA_INIT is the name of the environment variable that Lua
L0066    @* checks for initialization code.
L0067    ** CHANGE them if you want different names.
L0068    */
L0069    #define LUA_PATH        "LUA_PATH"
L0070    #define LUA_CPATH       "LUA_CPATH"
L0071    #define LUA_INIT	"LUA_INIT"
L0072    
L0073    
L0074    /*
L0075    @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
L0076    @* Lua libraries.
L0077    @@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for
L0078    @* C libraries.
L0079    ** CHANGE them if your machine has a non-conventional directory
L0080    ** hierarchy or if you want to install your libraries in
L0081    ** non-conventional directories.
L0082    */
L0083    #if defined(_WIN32)
L0084    /*
L0085    ** In Windows, any exclamation mark ('!') in the path is replaced by the
L0086    ** path of the directory of the executable file of the current process.
L0087    */
L0088    #define LUA_LDIR	"!\\lua\\"
L0089    #define LUA_CDIR	"!\\"
L0090    #define LUA_PATH_DEFAULT  \
L0091    		".\\?.lua;"  LUA_LDIR"?.lua;"  LUA_LDIR"?\\init.lua;" \
L0092    		             LUA_CDIR"?.lua;"  LUA_CDIR"?\\init.lua"
L0093    #define LUA_CPATH_DEFAULT \
L0094    	".\\?.dll;"  LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll"
L0095    
L0096    #else
L0097    #define LUA_ROOT	"/usr/local/"
L0098    #define LUA_LDIR	LUA_ROOT "share/lua/5.1/"
L0099    #define LUA_CDIR	LUA_ROOT "lib/lua/5.1/"
L0100    #define LUA_PATH_DEFAULT  \
L0101    		"./?.lua;"  LUA_LDIR"?.lua;"  LUA_LDIR"?/init.lua;" \
L0102    		            LUA_CDIR"?.lua;"  LUA_CDIR"?/init.lua"
L0103    #define LUA_CPATH_DEFAULT \
L0104    	"./?.so;"  LUA_CDIR"?.so;" LUA_CDIR"loadall.so"
L0105    #endif
L0106    
L0107    
L0108    /*
L0109    @@ LUA_DIRSEP is the directory separator (for submodules).
L0110    ** CHANGE it if your machine does not use "/" as the directory separator
L0111    ** and is not Windows. (On Windows Lua automatically uses "\".)
L0112    */
L0113    #if defined(_WIN32)
L0114    #define LUA_DIRSEP	"\\"
L0115    #else
L0116    #define LUA_DIRSEP	"/"
L0117    #endif
L0118    
L0119    
L0120    /*
L0121    @@ LUA_PATHSEP is the character that separates templates in a path.
L0122    @@ LUA_PATH_MARK is the string that marks the substitution points in a
L0123    @* template.
L0124    @@ LUA_EXECDIR in a Windows path is replaced by the executable's
L0125    @* directory.
L0126    @@ LUA_IGMARK is a mark to ignore all before it when bulding the
L0127    @* luaopen_ function name.
L0128    ** CHANGE them if for some reason your system cannot use those
L0129    ** characters. (E.g., if one of those characters is a common character
L0130    ** in file/directory names.) Probably you do not need to change them.
L0131    */
L0132    #define LUA_PATHSEP	";"
L0133    #define LUA_PATH_MARK	"?"
L0134    #define LUA_EXECDIR	"!"
L0135    #define LUA_IGMARK	"-"
L0136    
L0137    
L0138    /*
L0139    @@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger.
L0140    ** CHANGE that if ptrdiff_t is not adequate on your machine. (On most
L0141    ** machines, ptrdiff_t gives a good choice between int or long.)
L0142    */
L0143    #define LUA_INTEGER	ptrdiff_t
L0144    
L0145    
L0146    /*
L0147    @@ LUA_API is a mark for all core API functions.
L0148    @@ LUALIB_API is a mark for all standard library functions.
L0149    ** CHANGE them if you need to define those functions in some special way.
L0150    ** For instance, if you want to create one Windows DLL with the core and
L0151    ** the libraries, you may want to use the following definition (define
L0152    ** LUA_BUILD_AS_DLL to get it).
L0153    */
L0154    #if defined(LUA_BUILD_AS_DLL)
L0155    
L0156    #if defined(LUA_CORE) || defined(LUA_LIB)
L0157    #define LUA_API __declspec(dllexport)
L0158    #else
L0159    #define LUA_API __declspec(dllimport)
L0160    #endif
L0161    
L0162    #else
L0163    
L0164    #define LUA_API		extern
L0165    
L0166    #endif
L0167    
L0168    /* more often than not the libs go together with the core */
L0169    #define LUALIB_API	LUA_API
L0170    
L0171    
L0172    /*
L0173    @@ LUAI_FUNC is a mark for all extern functions that are not to be
L0174    @* exported to outside modules.
L0175    @@ LUAI_DATA is a mark for all extern (const) variables that are not to
L0176    @* be exported to outside modules.
L0177    ** CHANGE them if you need to mark them in some special way. Elf/gcc
L0178    ** (versions 3.2 and later) mark them as "hidden" to optimize access
L0179    ** when Lua is compiled as a shared library.
L0180    */
L0181    #if defined(luaall_c)
L0182    #define LUAI_FUNC	static
L0183    #define LUAI_DATA	/* empty */
L0184    
L0185    #elif defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
L0186          defined(__ELF__)
L0187    #define LUAI_FUNC	__attribute__((visibility("hidden"))) extern
L0188    #define LUAI_DATA	LUAI_FUNC
L0189    
L0190    #else
L0191    #define LUAI_FUNC	extern
L0192    #define LUAI_DATA	extern
L0193    #endif
L0194    
L0195    
L0196    
L0197    /*
L0198    @@ LUA_QL describes how error messages quote program elements.
L0199    ** CHANGE it if you want a different appearance.
L0200    */
L0201    #define LUA_QL(x)	"'" x "'"
L0202    #define LUA_QS		LUA_QL("%s")
L0203    
L0204    
L0205    /*
L0206    @@ LUA_IDSIZE gives the maximum size for the description of the source
L0207    @* of a function in debug information.
L0208    ** CHANGE it if you want a different size.
L0209    */
L0210    #define LUA_IDSIZE	60
L0211    
L0212    
L0213    /*
L0214    ** {==================================================================
L0215    ** Stand-alone configuration
L0216    ** ===================================================================
L0217    */
L0218    
L0219    #if defined(lua_c) || defined(luaall_c)
L0220    
L0221    /*
L0222    @@ lua_stdin_is_tty detects whether the standard input is a 'tty' (that
L0223    @* is, whether we're running lua interactively).
L0224    ** CHANGE it if you have a better definition for non-POSIX/non-Windows
L0225    ** systems.
L0226    */
L0227    #if defined(LUA_USE_ISATTY)
L0228    #include <unistd.h>
L0229    #define lua_stdin_is_tty()	isatty(0)
L0230    #elif defined(LUA_WIN)
L0231    #include <io.h>
L0232    #include <stdio.h>
L0233    #define lua_stdin_is_tty()	_isatty(_fileno(stdin))
L0234    #else
L0235    #define lua_stdin_is_tty()	1  /* assume stdin is a tty */
L0236    #endif
L0237    
L0238    
L0239    /*
L0240    @@ LUA_PROMPT is the default prompt used by stand-alone Lua.
L0241    @@ LUA_PROMPT2 is the default continuation prompt used by stand-alone Lua.
L0242    ** CHANGE them if you want different prompts. (You can also change the
L0243    ** prompts dynamically, assigning to globals _PROMPT/_PROMPT2.)
L0244    */
L0245    #define LUA_PROMPT		"> "
L0246    #define LUA_PROMPT2		">> "
L0247    
L0248    
L0249    /*
L0250    @@ LUA_PROGNAME is the default name for the stand-alone Lua program.
L0251    ** CHANGE it if your stand-alone interpreter has a different name and
L0252    ** your system is not able to detect that name automatically.
L0253    */
L0254    #define LUA_PROGNAME		"lua"
L0255    
L0256    
L0257    /*
L0258    @@ LUA_MAXINPUT is the maximum length for an input line in the
L0259    @* stand-alone interpreter.
L0260    ** CHANGE it if you need longer lines.
L0261    */
L0262    #define LUA_MAXINPUT	512
L0263    
L0264    
L0265    /*
L0266    @@ lua_readline defines how to show a prompt and then read a line from
L0267    @* the standard input.
L0268    @@ lua_saveline defines how to "save" a read line in a "history".
L0269    @@ lua_freeline defines how to free a line read by lua_readline.
L0270    ** CHANGE them if you want to improve this functionality (e.g., by using
L0271    ** GNU readline and history facilities).
L0272    */
L0273    #if defined(LUA_USE_READLINE)
L0274    #include <stdio.h>
L0275    #include <readline/readline.h>
L0276    #include <readline/history.h>
L0277    #define lua_readline(L,b,p)	((void)L, ((b)=readline(p)) != NULL)
L0278    #define lua_saveline(L,idx) \
L0279    	if (lua_strlen(L,idx) > 0)  /* non-empty line? */ \
L0280    	  add_history(lua_tostring(L, idx));  /* add it to history */
L0281    #define lua_freeline(L,b)	((void)L, free(b))
L0282    #else
L0283    #define lua_readline(L,b,p)	\
L0284    	((void)L, fputs(p, stdout), fflush(stdout),  /* show prompt */ \
L0285    	fgets(b, LUA_MAXINPUT, stdin) != NULL)  /* get line */
L0286    #define lua_saveline(L,idx)	{ (void)L; (void)idx; }
L0287    #define lua_freeline(L,b)	{ (void)L; (void)b; }
L0288    #endif
L0289    
L0290    #endif
L0291    
L0292    /* }================================================================== */
L0293    
L0294    
L0295    /*
L0296    @@ LUAI_GCPAUSE defines the default pause between garbage-collector cycles
L0297    @* as a percentage.
L0298    ** CHANGE it if you want the GC to run faster or slower (higher values
L0299    ** mean larger pauses which mean slower collection.) You can also change
L0300    ** this value dynamically.
L0301    */
L0302    #define LUAI_GCPAUSE	200  /* 200% (wait memory to double before next GC) */
L0303    
L0304    
L0305    /*
L0306    @@ LUAI_GCMUL defines the default speed of garbage collection relative to
L0307    @* memory allocation as a percentage.
L0308    ** CHANGE it if you want to change the granularity of the garbage
L0309    ** collection. (Higher values mean coarser collections. 0 represents
L0310    ** infinity, where each step performs a full collection.) You can also
L0311    ** change this value dynamically.
L0312    */
L0313    #define LUAI_GCMUL	200 /* GC runs 'twice the speed' of memory allocation */
L0314    
L0315    
L0316    
L0317    /*
L0318    @@ LUA_COMPAT_GETN controls compatibility with old getn behavior.
L0319    ** CHANGE it (define it) if you want exact compatibility with the
L0320    ** behavior of setn/getn in Lua 5.0.
L0321    */
L0322    #undef LUA_COMPAT_GETN
L0323    
L0324    /*
L0325    @@ LUA_COMPAT_LOADLIB controls compatibility about global loadlib.
L0326    ** CHANGE it to undefined as soon as you do not need a global 'loadlib'
L0327    ** function (the function is still available as 'package.loadlib').
L0328    */
L0329    #undef LUA_COMPAT_LOADLIB
L0330    
L0331    /*
L0332    @@ LUA_COMPAT_VARARG controls compatibility with old vararg feature.
L0333    ** CHANGE it to undefined as soon as your programs use only '...' to
L0334    ** access vararg parameters (instead of the old 'arg' table).
L0335    */
L0336    #define LUA_COMPAT_VARARG
L0337    
L0338    /*
L0339    @@ LUA_COMPAT_MOD controls compatibility with old math.mod function.
L0340    ** CHANGE it to undefined as soon as your programs use 'math.fmod' or
L0341    ** the new '%' operator instead of 'math.mod'.
L0342    */
L0343    #define LUA_COMPAT_MOD
L0344    
L0345    /*
L0346    @@ LUA_COMPAT_LSTR controls compatibility with old long string nesting
L0347    @* facility.
L0348    ** CHANGE it to 2 if you want the old behaviour, or undefine it to turn
L0349    ** off the advisory error when nesting [[...]].
L0350    */
L0351    #define LUA_COMPAT_LSTR		1
L0352    
L0353    /*
L0354    @@ LUA_COMPAT_GFIND controls compatibility with old 'string.gfind' name.
L0355    ** CHANGE it to undefined as soon as you rename 'string.gfind' to
L0356    ** 'string.gmatch'.
L0357    */
L0358    #define LUA_COMPAT_GFIND
L0359    
L0360    /*
L0361    @@ LUA_COMPAT_OPENLIB controls compatibility with old 'luaL_openlib'
L0362    @* behavior.
L0363    ** CHANGE it to undefined as soon as you replace to 'luaL_register'
L0364    ** your uses of 'luaL_openlib'
L0365    */
L0366    #define LUA_COMPAT_OPENLIB
L0367    
L0368    
L0369    
L0370    /*
L0371    @@ luai_apicheck is the assert macro used by the Lua-C API.
L0372    ** CHANGE luai_apicheck if you want Lua to perform some checks in the
L0373    ** parameters it gets from API calls. This may slow down the interpreter
L0374    ** a bit, but may be quite useful when debugging C code that interfaces
L0375    ** with Lua. A useful redefinition is to use assert.h.
L0376    */
L0377    #if defined(LUA_USE_APICHECK)
L0378    #include <assert.h>
L0379    #define luai_apicheck(L,o)	{ (void)L; assert(o); }
L0380    #else
L0381    #define luai_apicheck(L,o)	{ (void)L; }
L0382    #endif
L0383    
L0384    
L0385    /*
L0386    @@ LUAI_BITSINT defines the number of bits in an int.
L0387    ** CHANGE here if Lua cannot automatically detect the number of bits of
L0388    ** your machine. Probably you do not need to change this.
L0389    */
L0390    /* avoid overflows in comparison */
L0391    #if INT_MAX-20 < 32760
L0392    #define LUAI_BITSINT	16
L0393    #elif INT_MAX > 2147483640L
L0394    /* int has at least 32 bits */
L0395    #define LUAI_BITSINT	32
L0396    #else
L0397    #error "you must define LUA_BITSINT with number of bits in an integer"
L0398    #endif
L0399    
L0400    
L0401    /*
L0402    @@ LUAI_UINT32 is an unsigned integer with at least 32 bits.
L0403    @@ LUAI_INT32 is an signed integer with at least 32 bits.
L0404    @@ LUAI_UMEM is an unsigned integer big enough to count the total
L0405    @* memory used by Lua.
L0406    @@ LUAI_MEM is a signed integer big enough to count the total memory
L0407    @* used by Lua.
L0408    ** CHANGE here if for some weird reason the default definitions are not
L0409    ** good enough for your machine. (The definitions in the 'else'
L0410    ** part always works, but may waste space on machines with 64-bit
L0411    ** longs.) Probably you do not need to change this.
L0412    */
L0413    #if LUAI_BITSINT >= 32
L0414    #define LUAI_UINT32	unsigned int
L0415    #define LUAI_INT32	int
L0416    #define LUAI_MAXINT32	INT_MAX
L0417    #define LUAI_UMEM	size_t
L0418    #define LUAI_MEM	ptrdiff_t
L0419    #else
L0420    /* 16-bit ints */
L0421    #define LUAI_UINT32	unsigned long
L0422    #define LUAI_INT32	long
L0423    #define LUAI_MAXINT32	LONG_MAX
L0424    #define LUAI_UMEM	unsigned long
L0425    #define LUAI_MEM	long
L0426    #endif
L0427    
L0428    
L0429    /*
L0430    @@ LUAI_MAXCALLS limits the number of nested calls.
L0431    ** CHANGE it if you need really deep recursive calls. This limit is
L0432    ** arbitrary; its only purpose is to stop infinite recursion before
L0433    ** exhausting memory.
L0434    */
L0435    #define LUAI_MAXCALLS	20000
L0436    
L0437    
L0438    /*
L0439    @@ LUAI_MAXCSTACK limits the number of Lua stack slots that a C function
L0440    @* can use.
L0441    ** CHANGE it if you need lots of (Lua) stack space for your C
L0442    ** functions. This limit is arbitrary; its only purpose is to stop C
L0443    ** functions to consume unlimited stack space. (must be smaller than
L0444    ** -LUA_REGISTRYINDEX)
L0445    */
L0446    #define LUAI_MAXCSTACK	8000
L0447    
L0448    
L0449    
L0450    /*
L0451    ** {==================================================================
L0452    ** CHANGE (to smaller values) the following definitions if your system
L0453    ** has a small C stack. (Or you may want to change them to larger
L0454    ** values if your system has a large C stack and these limits are
L0455    ** too rigid for you.) Some of these constants control the size of
L0456    ** stack-allocated arrays used by the compiler or the interpreter, while
L0457    ** others limit the maximum number of recursive calls that the compiler
L0458    ** or the interpreter can perform. Values too large may cause a C stack
L0459    ** overflow for some forms of deep constructs.
L0460    ** ===================================================================
L0461    */
L0462    
L0463    
L0464    /*
L0465    @@ LUAI_MAXCCALLS is the maximum depth for nested C calls (short) and
L0466    @* syntactical nested non-terminals in a program.
L0467    */
L0468    #define LUAI_MAXCCALLS		200
L0469    
L0470    
L0471    /*
L0472    @@ LUAI_MAXVARS is the maximum number of local variables per function
L0473    @* (must be smaller than 250).
L0474    */
L0475    #define LUAI_MAXVARS		200
L0476    
L0477    
L0478    /*
L0479    @@ LUAI_MAXUPVALUES is the maximum number of upvalues per function
L0480    @* (must be smaller than 250).
L0481    */
L0482    #define LUAI_MAXUPVALUES	60
L0483    
L0484    
L0485    /*
L0486    @@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
L0487    */
L0488    #define LUAL_BUFFERSIZE		BUFSIZ
L0489    
L0490    /* }================================================================== */
L0491    
L0492    
L0493    
L0494    
L0495    /*
L0496    ** {==================================================================
L0497    @@ LUA_NUMBER is the type of numbers in Lua.
L0498    ** CHANGE the following definitions only if you want to build Lua
L0499    ** with a number type different from double. You may also need to
L0500    ** change lua_number2int & lua_number2integer.
L0501    ** ===================================================================
L0502    */
L0503    
L0504    #define LUA_NUMBER_DOUBLE
L0505    #define LUA_NUMBER	double
L0506    
L0507    /*
L0508    @@ LUAI_UACNUMBER is the result of an 'usual argument conversion'
L0509    @* over a number.
L0510    */
L0511    #define LUAI_UACNUMBER	double
L0512    
L0513    
L0514    /*
L0515    @@ LUA_NUMBER_SCAN is the format for reading numbers.
L0516    @@ LUA_NUMBER_FMT is the format for writing numbers.
L0517    @@ lua_number2str converts a number to a string.
L0518    @@ LUAI_MAXNUMBER2STR is maximum size of previous conversion.
L0519    @@ lua_str2number converts a string to a number.
L0520    */
L0521    #define LUA_NUMBER_SCAN		"%lf"
L0522    #define LUA_NUMBER_FMT		"%.14g"
L0523    #define lua_number2str(s,n)	sprintf((s), LUA_NUMBER_FMT, (n))
L0524    #define LUAI_MAXNUMBER2STR	32 /* 16 digits, sign, point, and \0 */
L0525    #define lua_str2number(s,p)	strtod((s), (p))
L0526    
L0527    
L0528    /*
L0529    @@ The luai_num* macros define the primitive operations over numbers.
L0530    */
L0531    #if defined(LUA_CORE)
L0532    #include <math.h>
L0533    #define luai_numadd(a,b)	((a)+(b))
L0534    #define luai_numsub(a,b)	((a)-(b))
L0535    #define luai_nummul(a,b)	((a)*(b))
L0536    #define luai_numdiv(a,b)	((a)/(b))
L0537    #define luai_nummod(a,b)	((a) - floor((a)/(b))*(b))
L0538    #define luai_numpow(a,b)	(pow(a,b))
L0539    #define luai_numunm(a)		(-(a))
L0540    #define luai_numeq(a,b)		((a)==(b))
L0541    #define luai_numlt(a,b)		((a)<(b))
L0542    #define luai_numle(a,b)		((a)<=(b))
L0543    #define luai_numisnan(a)	(!luai_numeq((a), (a)))
L0544    #endif
L0545    
L0546    
L0547    /*
L0548    @@ lua_number2int is a macro to convert lua_Number to int.
L0549    @@ lua_number2integer is a macro to convert lua_Number to lua_Integer.
L0550    ** CHANGE them if you know a faster way to convert a lua_Number to
L0551    ** int (with any rounding method and without throwing errors) in your
L0552    ** system. In Pentium machines, a naive typecast from double to int
L0553    ** in C is extremely slow, so any alternative is worth trying.
L0554    */
L0555    
L0556    /* On a Pentium, resort to a trick */
L0557    #if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) && !defined(__SSE2__) && \
L0558        (defined(__i386) || defined (_M_IX86) || defined(__i386__))
L0559    
L0560    /* On a Microsoft compiler, use assembler */
L0561    #if defined(_MSC_VER)
L0562    
L0563    #define lua_number2int(i,d)   __asm fld d   __asm fistp i
L0564    #define lua_number2integer(i,n)		lua_number2int(i, n)
L0565    
L0566    /* the next trick should work on any Pentium, but sometimes clashes
L0567       with a DirectX idiosyncrasy */
L0568    #else
L0569    
L0570    union luai_Cast { double l_d; long l_l; };
L0571    #define lua_number2int(i,d) \
L0572      { volatile union luai_Cast u; u.l_d = (d) + 6755399441055744.0; (i) = u.l_l; }
L0573    #define lua_number2integer(i,n)		lua_number2int(i, n)
L0574    
L0575    #endif
L0576    
L0577    
L0578    /* this option always works, but may be slow */
L0579    #else
L0580    #define lua_number2int(i,d)	((i)=(int)(d))
L0581    #define lua_number2integer(i,d)	((i)=(lua_Integer)(d))
L0582    
L0583    #endif
L0584    
L0585    /* }================================================================== */
L0586    
L0587    
L0588    /*
L0589    @@ LUAI_USER_ALIGNMENT_T is a type that requires maximum alignment.
L0590    ** CHANGE it if your system requires alignments larger than double. (For
L0591    ** instance, if your system supports long doubles and they must be
L0592    ** aligned in 16-byte boundaries, then you should add long double in the
L0593    ** union.) Probably you do not need to change this.
L0594    */
L0595    #define LUAI_USER_ALIGNMENT_T	union { double u; void *s; long l; }
L0596    
L0597    
L0598    /*
L0599    @@ LUAI_THROW/LUAI_TRY define how Lua does exception handling.
L0600    ** CHANGE them if you prefer to use longjmp/setjmp even with C++
L0601    ** or if want/don't to use _longjmp/_setjmp instead of regular
L0602    ** longjmp/setjmp. By default, Lua handles errors with exceptions when
L0603    ** compiling as C++ code, with _longjmp/_setjmp when asked to use them,
L0604    ** and with longjmp/setjmp otherwise.
L0605    */
L0606    #if defined(__cplusplus)
L0607    /* C++ exceptions */
L0608    #define LUAI_THROW(L,c)	throw(c)
L0609    #define LUAI_TRY(L,c,a)	try { a } catch(...) \
L0610    	{ if ((c)->status == 0) (c)->status = -1; }
L0611    #define luai_jmpbuf	int  /* dummy variable */
L0612    
L0613    #elif defined(LUA_USE_ULONGJMP)
L0614    /* in Unix, try _longjmp/_setjmp (more efficient) */
L0615    #define LUAI_THROW(L,c)	_longjmp((c)->b, 1)
L0616    #define LUAI_TRY(L,c,a)	if (_setjmp((c)->b) == 0) { a }
L0617    #define luai_jmpbuf	jmp_buf
L0618    
L0619    #else
L0620    /* default handling with long jumps */
L0621    #define LUAI_THROW(L,c)	longjmp((c)->b, 1)
L0622    #define LUAI_TRY(L,c,a)	if (setjmp((c)->b) == 0) { a }
L0623    #define luai_jmpbuf	jmp_buf
L0624    
L0625    #endif
L0626    
L0627    
L0628    /*
L0629    @@ LUA_MAXCAPTURES is the maximum number of captures that a pattern
L0630    @* can do during pattern-matching.
L0631    ** CHANGE it if you need more captures. This limit is arbitrary.
L0632    */
L0633    #define LUA_MAXCAPTURES		32
L0634    
L0635    
L0636    /*
L0637    @@ lua_tmpnam is the function that the OS library uses to create a
L0638    @* temporary name.
L0639    @@ LUA_TMPNAMBUFSIZE is the maximum size of a name created by lua_tmpnam.
L0640    ** CHANGE them if you have an alternative to tmpnam (which is considered
L0641    ** insecure) or if you want the original tmpnam anyway.  By default, Lua
L0642    ** uses tmpnam except when POSIX is available, where it uses mkstemp.
L0643    */
L0644    #if defined(loslib_c) || defined(luaall_c)
L0645    
L0646    #if defined(LUA_USE_MKSTEMP)
L0647    #include <unistd.h>
L0648    #define LUA_TMPNAMBUFSIZE	32
L0649    #define lua_tmpnam(b,e)	{ \
L0650    	strcpy(b, "/tmp/lua_XXXXXX"); \
L0651    	e = mkstemp(b); \
L0652    	if (e != -1) close(e); \
L0653    	e = (e == -1); }
L0654    
L0655    #else
L0656    #define LUA_TMPNAMBUFSIZE	L_tmpnam
L0657    #define lua_tmpnam(b,e)		{ e = (tmpnam(b) == NULL); }
L0658    #endif
L0659    
L0660    #endif
L0661    
L0662    
L0663    /*
L0664    @@ lua_popen spawns a new process connected to the current one through
L0665    @* the file streams.
L0666    ** CHANGE it if you have a way to implement it in your system.
L0667    */
L0668    #if defined(LUA_USE_POPEN)
L0669    
L0670    #define lua_popen(L,c,m)	((void)L, fflush(NULL), popen(c,m))
L0671    #define lua_pclose(L,file)	((void)L, (pclose(file) != -1))
L0672    
L0673    #elif defined(LUA_WIN)
L0674    
L0675    #define lua_popen(L,c,m)	((void)L, _popen(c,m))
L0676    #define lua_pclose(L,file)	((void)L, (_pclose(file) != -1))
L0677    
L0678    #else
L0679    
L0680    #define lua_popen(L,c,m)	((void)((void)c, m),  \
L0681    		luaL_error(L, LUA_QL("popen") " not supported"), (FILE*)0)
L0682    #define lua_pclose(L,file)		((void)((void)L, file), 0)
L0683    
L0684    #endif
L0685    
L0686    /*
L0687    @@ LUA_DL_* define which dynamic-library system Lua should use.
L0688    ** CHANGE here if Lua has problems choosing the appropriate
L0689    ** dynamic-library system for your platform (either Windows' DLL, Mac's
L0690    ** dyld, or Unix's dlopen). If your system is some kind of Unix, there
L0691    ** is a good chance that it has dlopen, so LUA_DL_DLOPEN will work for
L0692    ** it.  To use dlopen you also need to adapt the src/Makefile (probably
L0693    ** adding -ldl to the linker options), so Lua does not select it
L0694    ** automatically.  (When you change the makefile to add -ldl, you must
L0695    ** also add -DLUA_USE_DLOPEN.)
L0696    ** If you do not want any kind of dynamic library, undefine all these
L0697    ** options.
L0698    ** By default, _WIN32 gets LUA_DL_DLL and MAC OS X gets LUA_DL_DYLD.
L0699    */
L0700    #if defined(LUA_USE_DLOPEN)
L0701    #define LUA_DL_DLOPEN
L0702    #endif
L0703    
L0704    #if defined(LUA_WIN)
L0705    #define LUA_DL_DLL
L0706    #endif
L0707    
L0708    
L0709    /*
L0710    @@ LUAI_EXTRASPACE allows you to add user-specific data in a lua_State
L0711    @* (the data goes just *before* the lua_State pointer).
L0712    ** CHANGE (define) this if you really need that. This value must be
L0713    ** a multiple of the maximum alignment required for your machine.
L0714    */
L0715    #define LUAI_EXTRASPACE		0
L0716    
L0717    
L0718    /*
L0719    @@ luai_userstate* allow user-specific actions on threads.
L0720    ** CHANGE them if you defined LUAI_EXTRASPACE and need to do something
L0721    ** extra when a thread is created/deleted/resumed/yielded.
L0722    */
L0723    #define luai_userstateopen(L)		((void)L)
L0724    #define luai_userstateclose(L)		((void)L)
L0725    #define luai_userstatethread(L,L1)	((void)L)
L0726    #define luai_userstatefree(L)		((void)L)
L0727    #define luai_userstateresume(L,n)	((void)L)
L0728    #define luai_userstateyield(L,n)	((void)L)
L0729    
L0730    
L0731    /*
L0732    @@ LUA_INTFRMLEN is the length modifier for integer conversions
L0733    @* in 'string.format'.
L0734    @@ LUA_INTFRM_T is the integer type correspoding to the previous length
L0735    @* modifier.
L0736    ** CHANGE them if your system supports long long or does not support long.
L0737    */
L0738    
L0739    #if defined(LUA_USELONGLONG)
L0740    
L0741    #define LUA_INTFRMLEN		"ll"
L0742    #define LUA_INTFRM_T		long long
L0743    
L0744    #else
L0745    
L0746    #define LUA_INTFRMLEN		"l"
L0747    #define LUA_INTFRM_T		long
L0748    
L0749    #endif
L0750    
L0751    
L0752    
L0753    /* =================================================================== */
L0754    
L0755    /*
L0756    ** Local configuration. You can use this space to add your redefinitions
L0757    ** without modifying the main part of the file.
L0758    */
L0759    
L0760    
L0761    
L0762    #endif
L0763    

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