luaconf.h

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/*
@@ 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


/*
@@ LUAI_UINT32 is an unsigned integer with at least 32 bits.
@@ LUAI_INT32 is an signed integer with at least 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. (The definitions in the 'else'
** part always works, but may waste space on machines with 64-bit
** longs.) Probably you do not need to change this.
*/
#if LUAI_BITSINT >= 32
#define LUAI_UINT32	unsigned int
#define LUAI_INT32	int
#define LUAI_MAXINT32	INT_MAX
#define LUAI_UMEM	size_t
#define LUAI_MEM	ptrdiff_t
#else
/* 16-bit ints */
#define LUAI_UINT32	unsigned long
#define LUAI_INT32	long
#define LUAI_MAXINT32	LONG_MAX
#define LUAI_UMEM	unsigned long
#define LUAI_MEM	long
#endif


/*
@@ LUAI_MAXCALLS limits the number of nested calls.
** CHANGE it if you need really deep recursive calls. This limit is
** arbitrary; its only purpose is to stop infinite recursion before
** exhausting memory.
*/
#define LUAI_MAXCALLS	20000


/*
@@ LUAI_MAXCSTACK limits the number of Lua stack slots that a C function
@* can use.
** CHANGE it if you need lots of (Lua) stack space for your C
** functions. This limit is arbitrary; its only purpose is to stop C
** functions to consume unlimited stack space.
*/
#define LUAI_MAXCSTACK	2048



/*
** {==================================================================
** 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


/*
@@ LUAI_MAXVARS is the maximum number of local variables per function
@* (must be smaller than 250).
*/
#define LUAI_MAXVARS		200


/*
@@ LUAI_MAXUPVALUES is the maximum number of upvalues per function
@* (must be smaller than 250).
*/
#define LUAI_MAXUPVALUES	60


/*
@@ 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.
** ===================================================================
*/

//SPRING#define LUA_NUMBER_DOUBLE
//SPRING#define LUA_NUMBER	double
#undef LUA_NUMBER_DOUBLE
#define LUA_NUMBER	float

/*
@@ 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.
*/
#if defined(LUA_CORE)
//SPRING#include <math.h>
#include "float3.h"
#define luai_numadd(a,b)	((a)+(b))
#define luai_numsub(a,b)	((a)-(b))
#define luai_nummul(a,b)	((a)*(b))
#define luai_numdiv(a,b)	((a)/(b))
#define luai_nummod(a,b)	((a) - floor((a)/(b))*(b))
#define luai_numpow(a,b)	(pow(a,b))
#define luai_numunm(a)		(-(a))
#define luai_numeq(a,b)		((a)==(b))
#define luai_numlt(a,b)		((a)<(b))
#define luai_numle(a,b)		((a)<=(b))
#define luai_numisnan(a)	(!luai_numeq((a), (a)))
#endif


/*
@@ lua_number2int is a macro to convert lua_Number to int.
@@ lua_number2integer is a macro to convert lua_Number to lua_Integer.
** 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)

/* the next trick should work on any Pentium, but sometimes clashes
   with a DirectX idiosyncrasy */
#else

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)

#endif


/* this option always works, but may be slow */
#else
#define lua_number2int(i,d)	((i)=(int)(d))
#define lua_number2integer(i,d)	((i)=(lua_Integer)(d))

#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 <unistd.h>
#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_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, popen(c,m))
#define lua_pclose(L,file)	((void)L, (pclose(file) != -1))

#elif defined(LUA_WIN)

#define lua_popen(L,c,m)	((void)L, _popen(c,m))
#define lua_pclose(L,file)	((void)L, (_pclose(file) != -1))

#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), 0)

#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 correspoding 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