/src/middleware/lua/luaconf.h

  1/*
  2** $Id: luaconf.h,v 1.82.1.7 2008/02/11 16:25:08 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(__STRICT_ANSI__)
 28#define LUA_ANSI
 29#endif
 30
 31
 32#if !defined(LUA_ANSI) && defined(_WIN32)
 33#define LUA_WIN
 34#endif
 35
 36#if defined(LUA_USE_LINUX)
 37#define LUA_USE_POSIX
 38#define LUA_USE_DLOPEN		/* needs an extra library: -ldl */
 39#define LUA_USE_READLINE	/* needs some extra libraries */
 40#endif
 41
 42#if defined(LUA_USE_MACOSX)
 43#define LUA_USE_POSIX
 44#define LUA_DL_DYLD		/* does not need extra library */
 45#endif
 46
 47
 48
 49/*
 50@@ LUA_USE_POSIX includes all functionallity listed as X/Open System
 51@* Interfaces Extension (XSI).
 52** CHANGE it (define it) if your system is XSI compatible.
 53*/
 54#if defined(LUA_USE_POSIX)
 55#define LUA_USE_MKSTEMP
 56#define LUA_USE_ISATTY
 57#define LUA_USE_POPEN
 58#define LUA_USE_ULONGJMP
 59#endif
 60
 61
 62/*
 63@@ LUA_PATH and LUA_CPATH are the names of the environment variables that
 64@* Lua check to set its paths.
 65@@ LUA_INIT is the name of the environment variable that Lua
 66@* checks for initialization code.
 67** CHANGE them if you want different names.
 68*/
 69#define LUA_PATH        "LUA_PATH"
 70#define LUA_CPATH       "LUA_CPATH"
 71#define LUA_INIT	"LUA_INIT"
 72
 73
 74/*
 75@@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
 76@* Lua libraries.
 77@@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for
 78@* C libraries.
 79** CHANGE them if your machine has a non-conventional directory
 80** hierarchy or if you want to install your libraries in
 81** non-conventional directories.
 82*/
 83#if defined(_WIN32)
 84/*
 85** In Windows, any exclamation mark ('!') in the path is replaced by the
 86** path of the directory of the executable file of the current process.
 87*/
 88#define LUA_LDIR	"!\\lua\\"
 89#define LUA_CDIR	"!\\"
 90#define LUA_PATH_DEFAULT  \
 91		".\\?.lua;"  LUA_LDIR"?.lua;"  LUA_LDIR"?\\init.lua;" \
 92		             LUA_CDIR"?.lua;"  LUA_CDIR"?\\init.lua"
 93#define LUA_CPATH_DEFAULT \
 94	".\\?.dll;"  LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll"
 95
 96#else
 97#define LUA_ROOT	"/usr/local/"
 98#define LUA_LDIR	LUA_ROOT "share/lua/5.1/"
 99#define LUA_CDIR	LUA_ROOT "lib/lua/5.1/"
100#define LUA_PATH_DEFAULT  \
101		"./?.lua;"  LUA_LDIR"?.lua;"  LUA_LDIR"?/init.lua;" \
102		            LUA_CDIR"?.lua;"  LUA_CDIR"?/init.lua"
103#define LUA_CPATH_DEFAULT \
104	"./?.so;"  LUA_CDIR"?.so;" LUA_CDIR"loadall.so"
105#endif
106
107
108/*
109@@ LUA_DIRSEP is the directory separator (for submodules).
110** CHANGE it if your machine does not use "/" as the directory separator
111** and is not Windows. (On Windows Lua automatically uses "\".)
112*/
113#if defined(_WIN32)
114#define LUA_DIRSEP	"\\"
115#else
116#define LUA_DIRSEP	"/"
117#endif
118
119
120/*
121@@ LUA_PATHSEP is the character that separates templates in a path.
122@@ LUA_PATH_MARK is the string that marks the substitution points in a
123@* template.
124@@ LUA_EXECDIR in a Windows path is replaced by the executable's
125@* directory.
126@@ LUA_IGMARK is a mark to ignore all before it when bulding the
127@* luaopen_ function name.
128** CHANGE them if for some reason your system cannot use those
129** characters. (E.g., if one of those characters is a common character
130** in file/directory names.) Probably you do not need to change them.
131*/
132#define LUA_PATHSEP	";"
133#define LUA_PATH_MARK	"?"
134#define LUA_EXECDIR	"!"
135#define LUA_IGMARK	"-"
136
137
138/*
139@@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger.
140** CHANGE that if ptrdiff_t is not adequate on your machine. (On most
141** machines, ptrdiff_t gives a good choice between int or long.)
142*/
143#define LUA_INTEGER	ptrdiff_t
144
145
146/*
147@@ LUA_API is a mark for all core API functions.
148@@ LUALIB_API is a mark for all standard library functions.
149** CHANGE them if you need to define those functions in some special way.
150** For instance, if you want to create one Windows DLL with the core and
151** the libraries, you may want to use the following definition (define
152** LUA_BUILD_AS_DLL to get it).
153*/
154#if defined(LUA_BUILD_AS_DLL)
155
156#if defined(LUA_CORE) || defined(LUA_LIB)
157#define LUA_API __declspec(dllexport)
158#else
159#define LUA_API __declspec(dllimport)
160#endif
161
162#else
163
164#define LUA_API		extern
165
166#endif
167
168/* more often than not the libs go together with the core */
169#define LUALIB_API	LUA_API
170
171
172/*
173@@ LUAI_FUNC is a mark for all extern functions that are not to be
174@* exported to outside modules.
175@@ LUAI_DATA is a mark for all extern (const) variables that are not to
176@* be exported to outside modules.
177** CHANGE them if you need to mark them in some special way. Elf/gcc
178** (versions 3.2 and later) mark them as "hidden" to optimize access
179** when Lua is compiled as a shared library.
180*/
181#if defined(luaall_c)
182#define LUAI_FUNC	static
183#define LUAI_DATA	/* empty */
184
185#elif defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
186      defined(__ELF__)
187#define LUAI_FUNC	__attribute__((visibility("hidden"))) extern
188#define LUAI_DATA	LUAI_FUNC
189
190#else
191#define LUAI_FUNC	extern
192#define LUAI_DATA	extern
193#endif
194
195
196
197/*
198@@ LUA_QL describes how error messages quote program elements.
199** CHANGE it if you want a different appearance.
200*/
201#define LUA_QL(x)	"'" x "'"
202#define LUA_QS		LUA_QL("%s")
203
204
205/*
206@@ LUA_IDSIZE gives the maximum size for the description of the source
207@* of a function in debug information.
208** CHANGE it if you want a different size.
209*/
210#define LUA_IDSIZE	60
211
212
213/*
214** {==================================================================
215** Stand-alone configuration
216** ===================================================================
217*/
218
219#if defined(lua_c) || defined(luaall_c)
220
221/*
222@@ lua_stdin_is_tty detects whether the standard input is a 'tty' (that
223@* is, whether we're running lua interactively).
224** CHANGE it if you have a better definition for non-POSIX/non-Windows
225** systems.
226*/
227#if defined(LUA_USE_ISATTY)
228#include <unistd.h>
229#define lua_stdin_is_tty()	isatty(0)
230#elif defined(LUA_WIN)
231#include <io.h>
232#include <stdio.h>
233#define lua_stdin_is_tty()	_isatty(_fileno(stdin))
234#else
235#define lua_stdin_is_tty()	1  /* assume stdin is a tty */
236#endif
237
238
239/*
240@@ LUA_PROMPT is the default prompt used by stand-alone Lua.
241@@ LUA_PROMPT2 is the default continuation prompt used by stand-alone Lua.
242** CHANGE them if you want different prompts. (You can also change the
243** prompts dynamically, assigning to globals _PROMPT/_PROMPT2.)
244*/
245#define LUA_PROMPT		"> "
246#define LUA_PROMPT2		">> "
247
248
249/*
250@@ LUA_PROGNAME is the default name for the stand-alone Lua program.
251** CHANGE it if your stand-alone interpreter has a different name and
252** your system is not able to detect that name automatically.
253*/
254#define LUA_PROGNAME		"lua"
255
256
257/*
258@@ LUA_MAXINPUT is the maximum length for an input line in the
259@* stand-alone interpreter.
260** CHANGE it if you need longer lines.
261*/
262#define LUA_MAXINPUT	512
263
264
265/*
266@@ lua_readline defines how to show a prompt and then read a line from
267@* the standard input.
268@@ lua_saveline defines how to "save" a read line in a "history".
269@@ lua_freeline defines how to free a line read by lua_readline.
270** CHANGE them if you want to improve this functionality (e.g., by using
271** GNU readline and history facilities).
272*/
273#if defined(LUA_USE_READLINE)
274#include <stdio.h>
275#include <readline/readline.h>
276#include <readline/history.h>
277#define lua_readline(L,b,p)	((void)L, ((b)=readline(p)) != NULL)
278#define lua_saveline(L,idx) \
279	if (lua_strlen(L,idx) > 0)  /* non-empty line? */ \
280	  add_history(lua_tostring(L, idx));  /* add it to history */
281#define lua_freeline(L,b)	((void)L, free(b))
282#else
283#define lua_readline(L,b,p)	\
284	((void)L, fputs(p, stdout), fflush(stdout),  /* show prompt */ \
285	fgets(b, LUA_MAXINPUT, stdin) != NULL)  /* get line */
286#define lua_saveline(L,idx)	{ (void)L; (void)idx; }
287#define lua_freeline(L,b)	{ (void)L; (void)b; }
288#endif
289
290#endif
291
292/* }================================================================== */
293
294
295/*
296@@ LUAI_GCPAUSE defines the default pause between garbage-collector cycles
297@* as a percentage.
298** CHANGE it if you want the GC to run faster or slower (higher values
299** mean larger pauses which mean slower collection.) You can also change
300** this value dynamically.
301*/
302#define LUAI_GCPAUSE	200  /* 200% (wait memory to double before next GC) */
303
304
305/*
306@@ LUAI_GCMUL defines the default speed of garbage collection relative to
307@* memory allocation as a percentage.
308** CHANGE it if you want to change the granularity of the garbage
309** collection. (Higher values mean coarser collections. 0 represents
310** infinity, where each step performs a full collection.) You can also
311** change this value dynamically.
312*/
313#define LUAI_GCMUL	200 /* GC runs 'twice the speed' of memory allocation */
314
315
316
317/*
318@@ LUA_COMPAT_GETN controls compatibility with old getn behavior.
319** CHANGE it (define it) if you want exact compatibility with the
320** behavior of setn/getn in Lua 5.0.
321*/
322#undef LUA_COMPAT_GETN
323
324/*
325@@ LUA_COMPAT_LOADLIB controls compatibility about global loadlib.
326** CHANGE it to undefined as soon as you do not need a global 'loadlib'
327** function (the function is still available as 'package.loadlib').
328*/
329#undef LUA_COMPAT_LOADLIB
330
331/*
332@@ LUA_COMPAT_VARARG controls compatibility with old vararg feature.
333** CHANGE it to undefined as soon as your programs use only '...' to
334** access vararg parameters (instead of the old 'arg' table).
335*/
336#define LUA_COMPAT_VARARG
337
338/*
339@@ LUA_COMPAT_MOD controls compatibility with old math.mod function.
340** CHANGE it to undefined as soon as your programs use 'math.fmod' or
341** the new '%' operator instead of 'math.mod'.
342*/
343#define LUA_COMPAT_MOD
344
345/*
346@@ LUA_COMPAT_LSTR controls compatibility with old long string nesting
347@* facility.
348** CHANGE it to 2 if you want the old behaviour, or undefine it to turn
349** off the advisory error when nesting [[...]].
350*/
351#define LUA_COMPAT_LSTR		1
352
353/*
354@@ LUA_COMPAT_GFIND controls compatibility with old 'string.gfind' name.
355** CHANGE it to undefined as soon as you rename 'string.gfind' to
356** 'string.gmatch'.
357*/
358#define LUA_COMPAT_GFIND
359
360/*
361@@ LUA_COMPAT_OPENLIB controls compatibility with old 'luaL_openlib'
362@* behavior.
363** CHANGE it to undefined as soon as you replace to 'luaL_register'
364** your uses of 'luaL_openlib'
365*/
366#define LUA_COMPAT_OPENLIB
367
368
369
370/*
371@@ luai_apicheck is the assert macro used by the Lua-C API.
372** CHANGE luai_apicheck if you want Lua to perform some checks in the
373** parameters it gets from API calls. This may slow down the interpreter
374** a bit, but may be quite useful when debugging C code that interfaces
375** with Lua. A useful redefinition is to use assert.h.
376*/
377#if defined(LUA_USE_APICHECK)
378#include <assert.h>
379#define luai_apicheck(L,o)	{ (void)L; assert(o); }
380#else
381#define luai_apicheck(L,o)	{ (void)L; }
382#endif
383
384
385/*
386@@ LUAI_BITSINT defines the number of bits in an int.
387** CHANGE here if Lua cannot automatically detect the number of bits of
388** your machine. Probably you do not need to change this.
389*/
390/* avoid overflows in comparison */
391#if INT_MAX-20 < 32760
392#define LUAI_BITSINT	16
393#elif INT_MAX > 2147483640L
394/* int has at least 32 bits */
395#define LUAI_BITSINT	32
396#else
397#error "you must define LUA_BITSINT with number of bits in an integer"
398#endif
399
400
401/*
402@@ LUAI_UINT32 is an unsigned integer with at least 32 bits.
403@@ LUAI_INT32 is an signed integer with at least 32 bits.
404@@ LUAI_UMEM is an unsigned integer big enough to count the total
405@* memory used by Lua.
406@@ LUAI_MEM is a signed integer big enough to count the total memory
407@* used by Lua.
408** CHANGE here if for some weird reason the default definitions are not
409** good enough for your machine. (The definitions in the 'else'
410** part always works, but may waste space on machines with 64-bit
411** longs.) Probably you do not need to change this.
412*/
413#if LUAI_BITSINT >= 32
414#define LUAI_UINT32	unsigned int
415#define LUAI_INT32	int
416#define LUAI_MAXINT32	INT_MAX
417#define LUAI_UMEM	size_t
418#define LUAI_MEM	ptrdiff_t
419#else
420/* 16-bit ints */
421#define LUAI_UINT32	unsigned long
422#define LUAI_INT32	long
423#define LUAI_MAXINT32	LONG_MAX
424#define LUAI_UMEM	unsigned long
425#define LUAI_MEM	long
426#endif
427
428
429/*
430@@ LUAI_MAXCALLS limits the number of nested calls.
431** CHANGE it if you need really deep recursive calls. This limit is
432** arbitrary; its only purpose is to stop infinite recursion before
433** exhausting memory.
434*/
435#define LUAI_MAXCALLS	20000
436
437
438/*
439@@ LUAI_MAXCSTACK limits the number of Lua stack slots that a C function
440@* can use.
441** CHANGE it if you need lots of (Lua) stack space for your C
442** functions. This limit is arbitrary; its only purpose is to stop C
443** functions to consume unlimited stack space. (must be smaller than
444** -LUA_REGISTRYINDEX)
445*/
446#define LUAI_MAXCSTACK	8000
447
448
449
450/*
451** {==================================================================
452** CHANGE (to smaller values) the following definitions if your system
453** has a small C stack. (Or you may want to change them to larger
454** values if your system has a large C stack and these limits are
455** too rigid for you.) Some of these constants control the size of
456** stack-allocated arrays used by the compiler or the interpreter, while
457** others limit the maximum number of recursive calls that the compiler
458** or the interpreter can perform. Values too large may cause a C stack
459** overflow for some forms of deep constructs.
460** ===================================================================
461*/
462
463
464/*
465@@ LUAI_MAXCCALLS is the maximum depth for nested C calls (short) and
466@* syntactical nested non-terminals in a program.
467*/
468#define LUAI_MAXCCALLS		200
469
470
471/*
472@@ LUAI_MAXVARS is the maximum number of local variables per function
473@* (must be smaller than 250).
474*/
475#define LUAI_MAXVARS		200
476
477
478/*
479@@ LUAI_MAXUPVALUES is the maximum number of upvalues per function
480@* (must be smaller than 250).
481*/
482#define LUAI_MAXUPVALUES	60
483
484
485/*
486@@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
487*/
488#define LUAL_BUFFERSIZE		BUFSIZ
489
490/* }================================================================== */
491
492
493
494
495/*
496** {==================================================================
497@@ LUA_NUMBER is the type of numbers in Lua.
498** CHANGE the following definitions only if you want to build Lua
499** with a number type different from double. You may also need to
500** change lua_number2int & lua_number2integer.
501** ===================================================================
502*/
503
504#define LUA_NUMBER_DOUBLE
505#define LUA_NUMBER	double
506
507/*
508@@ LUAI_UACNUMBER is the result of an 'usual argument conversion'
509@* over a number.
510*/
511#define LUAI_UACNUMBER	double
512
513
514/*
515@@ LUA_NUMBER_SCAN is the format for reading numbers.
516@@ LUA_NUMBER_FMT is the format for writing numbers.
517@@ lua_number2str converts a number to a string.
518@@ LUAI_MAXNUMBER2STR is maximum size of previous conversion.
519@@ lua_str2number converts a string to a number.
520*/
521#define LUA_NUMBER_SCAN		"%lf"
522#define LUA_NUMBER_FMT		"%.14g"
523#define lua_number2str(s,n)	sprintf((s), LUA_NUMBER_FMT, (n))
524#define LUAI_MAXNUMBER2STR	32 /* 16 digits, sign, point, and \0 */
525#define lua_str2number(s,p)	strtod((s), (p))
526
527
528/*
529@@ The luai_num* macros define the primitive operations over numbers.
530*/
531#if defined(LUA_CORE)
532#include <math.h>
533#define luai_numadd(a,b)	((a)+(b))
534#define luai_numsub(a,b)	((a)-(b))
535#define luai_nummul(a,b)	((a)*(b))
536#define luai_numdiv(a,b)	((a)/(b))
537#define luai_nummod(a,b)	((a) - floor((a)/(b))*(b))
538#define luai_numpow(a,b)	(pow(a,b))
539#define luai_numunm(a)		(-(a))
540#define luai_numeq(a,b)		((a)==(b))
541#define luai_numlt(a,b)		((a)<(b))
542#define luai_numle(a,b)		((a)<=(b))
543#define luai_numisnan(a)	(!luai_numeq((a), (a)))
544#endif
545
546
547/*
548@@ lua_number2int is a macro to convert lua_Number to int.
549@@ lua_number2integer is a macro to convert lua_Number to lua_Integer.
550** CHANGE them if you know a faster way to convert a lua_Number to
551** int (with any rounding method and without throwing errors) in your
552** system. In Pentium machines, a naive typecast from double to int
553** in C is extremely slow, so any alternative is worth trying.
554*/
555
556/* On a Pentium, resort to a trick */
557#if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) && !defined(__SSE2__) && \
558    (defined(__i386) || defined (_M_IX86) || defined(__i386__))
559
560/* On a Microsoft compiler, use assembler */
561#if defined(_MSC_VER)
562
563#define lua_number2int(i,d)    i = (int)d
564#define lua_number2integer(i,n)		lua_number2int(i, n)
565
566/* the next trick should work on any Pentium, but sometimes clashes
567   with a DirectX idiosyncrasy */
568#else
569
570union luai_Cast { double l_d; long l_l; };
571#define lua_number2int(i,d) \
572  { volatile union luai_Cast u; u.l_d = (d) + 6755399441055744.0; (i) = u.l_l; }
573#define lua_number2integer(i,n)		lua_number2int(i, n)
574
575#endif
576
577
578/* this option always works, but may be slow */
579#else
580#define lua_number2int(i,d)	((i)=(int)(d))
581#define lua_number2integer(i,d)	((i)=(lua_Integer)(d))
582
583#endif
584
585/* }================================================================== */
586
587
588/*
589@@ LUAI_USER_ALIGNMENT_T is a type that requires maximum alignment.
590** CHANGE it if your system requires alignments larger than double. (For
591** instance, if your system supports long doubles and they must be
592** aligned in 16-byte boundaries, then you should add long double in the
593** union.) Probably you do not need to change this.
594*/
595#define LUAI_USER_ALIGNMENT_T	union { double u; void *s; long l; }
596
597
598/*
599@@ LUAI_THROW/LUAI_TRY define how Lua does exception handling.
600** CHANGE them if you prefer to use longjmp/setjmp even with C++
601** or if want/don't to use _longjmp/_setjmp instead of regular
602** longjmp/setjmp. By default, Lua handles errors with exceptions when
603** compiling as C++ code, with _longjmp/_setjmp when asked to use them,
604** and with longjmp/setjmp otherwise.
605*/
606#if defined(__cplusplus)
607/* C++ exceptions */
608#define LUAI_THROW(L,c)	throw(c)
609#define LUAI_TRY(L,c,a)	try { a } catch(...) \
610	{ if ((c)->status == 0) (c)->status = -1; }
611#define luai_jmpbuf	int  /* dummy variable */
612
613#elif defined(LUA_USE_ULONGJMP)
614/* in Unix, try _longjmp/_setjmp (more efficient) */
615#define LUAI_THROW(L,c)	_longjmp((c)->b, 1)
616#define LUAI_TRY(L,c,a)	if (_setjmp((c)->b) == 0) { a }
617#define luai_jmpbuf	jmp_buf
618
619#else
620/* default handling with long jumps */
621#define LUAI_THROW(L,c)	longjmp((c)->b, 1)
622#define LUAI_TRY(L,c,a)	if (setjmp((c)->b) == 0) { a }
623#define luai_jmpbuf	jmp_buf
624
625#endif
626
627
628/*
629@@ LUA_MAXCAPTURES is the maximum number of captures that a pattern
630@* can do during pattern-matching.
631** CHANGE it if you need more captures. This limit is arbitrary.
632*/
633#define LUA_MAXCAPTURES		32
634
635
636/*
637@@ lua_tmpnam is the function that the OS library uses to create a
638@* temporary name.
639@@ LUA_TMPNAMBUFSIZE is the maximum size of a name created by lua_tmpnam.
640** CHANGE them if you have an alternative to tmpnam (which is considered
641** insecure) or if you want the original tmpnam anyway.  By default, Lua
642** uses tmpnam except when POSIX is available, where it uses mkstemp.
643*/
644#if defined(loslib_c) || defined(luaall_c)
645
646#if defined(LUA_USE_MKSTEMP)
647#include <unistd.h>
648#define LUA_TMPNAMBUFSIZE	32
649#define lua_tmpnam(b,e)	{ \
650	strcpy(b, "/tmp/lua_XXXXXX"); \
651	e = mkstemp(b); \
652	if (e != -1) close(e); \
653	e = (e == -1); }
654
655#else
656#define LUA_TMPNAMBUFSIZE	L_tmpnam
657#define lua_tmpnam(b,e)		{ e = (tmpnam(b) == NULL); }
658#endif
659
660#endif
661
662
663/*
664@@ lua_popen spawns a new process connected to the current one through
665@* the file streams.
666** CHANGE it if you have a way to implement it in your system.
667*/
668#if defined(LUA_USE_POPEN)
669
670#define lua_popen(L,c,m)	((void)L, fflush(NULL), popen(c,m))
671#define lua_pclose(L,file)	((void)L, (pclose(file) != -1))
672
673#elif defined(LUA_WIN)
674
675#define lua_popen(L,c,m)	((void)L, _popen(c,m))
676#define lua_pclose(L,file)	((void)L, (_pclose(file) != -1))
677
678#else
679
680#define lua_popen(L,c,m)	((void)((void)c, m),  \
681		luaL_error(L, LUA_QL("popen") " not supported"), (FILE*)0)
682#define lua_pclose(L,file)		((void)((void)L, file), 0)
683
684#endif
685
686/*
687@@ LUA_DL_* define which dynamic-library system Lua should use.
688** CHANGE here if Lua has problems choosing the appropriate
689** dynamic-library system for your platform (either Windows' DLL, Mac's
690** dyld, or Unix's dlopen). If your system is some kind of Unix, there
691** is a good chance that it has dlopen, so LUA_DL_DLOPEN will work for
692** it.  To use dlopen you also need to adapt the src/Makefile (probably
693** adding -ldl to the linker options), so Lua does not select it
694** automatically.  (When you change the makefile to add -ldl, you must
695** also add -DLUA_USE_DLOPEN.)
696** If you do not want any kind of dynamic library, undefine all these
697** options.
698** By default, _WIN32 gets LUA_DL_DLL and MAC OS X gets LUA_DL_DYLD.
699*/
700#if defined(LUA_USE_DLOPEN)
701#define LUA_DL_DLOPEN
702#endif
703
704#if defined(LUA_WIN)
705#define LUA_DL_DLL
706#endif
707
708
709/*
710@@ LUAI_EXTRASPACE allows you to add user-specific data in a lua_State
711@* (the data goes just *before* the lua_State pointer).
712** CHANGE (define) this if you really need that. This value must be
713** a multiple of the maximum alignment required for your machine.
714*/
715#define LUAI_EXTRASPACE		0
716
717
718/*
719@@ luai_userstate* allow user-specific actions on threads.
720** CHANGE them if you defined LUAI_EXTRASPACE and need to do something
721** extra when a thread is created/deleted/resumed/yielded.
722*/
723#define luai_userstateopen(L)		((void)L)
724#define luai_userstateclose(L)		((void)L)
725#define luai_userstatethread(L,L1)	((void)L)
726#define luai_userstatefree(L)		((void)L)
727#define luai_userstateresume(L,n)	((void)L)
728#define luai_userstateyield(L,n)	((void)L)
729
730
731/*
732@@ LUA_INTFRMLEN is the length modifier for integer conversions
733@* in 'string.format'.
734@@ LUA_INTFRM_T is the integer type correspoding to the previous length
735@* modifier.
736** CHANGE them if your system supports long long or does not support long.
737*/
738
739#if defined(LUA_USELONGLONG)
740
741#define LUA_INTFRMLEN		"ll"
742#define LUA_INTFRM_T		long long
743
744#else
745
746#define LUA_INTFRMLEN		"l"
747#define LUA_INTFRM_T		long
748
749#endif
750
751
752
753/* =================================================================== */
754
755/*
756** Local configuration. You can use this space to add your redefinitions
757** without modifying the main part of the file.
758*/
759
760
761
762#endif
763