Alien-Lua

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inc/luaconf.h  view on Meta::CPAN

/* the following operations need the math library */
#if defined(lobject_c) || defined(lvm_c)
#include <math.h>
#define luai_nummod(L,a,b)	((a) - l_mathop(floor)((a)/(b))*(b))
#define luai_numpow(L,a,b)	(l_mathop(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_UNSIGNED is the integral type used by lua_pushunsigned/lua_tounsigned.
** It must have at least 32 bits.
*/
#define LUA_UNSIGNED	unsigned LUA_INT32



/*
** Some tricks with doubles
*/

#if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI)	/* { */
/*
** The next definitions activate some tricks to speed up the
** conversion from doubles to integer types, mainly to LUA_UNSIGNED.
**
@@ LUA_MSASMTRICK uses Microsoft assembler to avoid clashes with a
** DirectX idiosyncrasy.
**
@@ LUA_IEEE754TRICK uses a trick that should work on any machine
** using IEEE754 with a 32-bit integer type.
**
@@ LUA_IEEELL extends the trick to LUA_INTEGER; should only be
** defined when LUA_INTEGER is a 32-bit integer.
**
@@ LUA_IEEEENDIAN is the endianness of doubles in your machine
** (0 for little endian, 1 for big endian); if not defined, Lua will
** check it dynamically for LUA_IEEE754TRICK (but not for LUA_NANTRICK).
**
@@ LUA_NANTRICK controls the use of a trick to pack all types into
** a single double value, using NaN values to represent non-number
** values. The trick only works on 32-bit machines (ints and pointers
** are 32-bit values) with numbers represented as IEEE 754-2008 doubles
** with conventional endianess (12345678 or 87654321), in CPUs that do
** not produce signaling NaN values (all NaNs are quiet).
*/

/* Microsoft compiler on a Pentium (32 bit) ? */
#if defined(LUA_WIN) && defined(_MSC_VER) && defined(_M_IX86)	/* { */

#define LUA_MSASMTRICK
#define LUA_IEEEENDIAN		0
#define LUA_NANTRICK


/* pentium 32 bits? */
#elif defined(__i386__) || defined(__i386) || defined(__X86__) /* }{ */

#define LUA_IEEE754TRICK
#define LUA_IEEELL
#define LUA_IEEEENDIAN		0
#define LUA_NANTRICK

/* pentium 64 bits? */
#elif defined(__x86_64)						/* }{ */

#define LUA_IEEE754TRICK
#define LUA_IEEEENDIAN		0

#elif defined(__POWERPC__) || defined(__ppc__)			/* }{ */

#define LUA_IEEE754TRICK
#define LUA_IEEEENDIAN		1

#else								/* }{ */

/* assume IEEE754 and a 32-bit integer type */
#define LUA_IEEE754TRICK

#endif								/* } */

#endif							/* } */

/* }================================================================== */




/* =================================================================== */

/*
** Local configuration. You can use this space to add your redefinitions
** without modifying the main part of the file.
*/



#endif

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