xfvalues.c

来自「C语言库函数的原型,有用的拿去」· C语言 代码 · 共 45 行

/* values used by math functions -- IEEE 754 float version */
#if defined(_M_CEE_PURE)
#if defined(MRTDLL)
#undef MRTDLL
#endif
#if defined(MRTDLL)
#undef CRTDLL
#endif
#endif

#include "xmath.h"
_C_STD_BEGIN

		/* macros */
#define NBITS	(16 + _FOFF)

 #if _D0 == 0
  #define INIT(w0)		{w0, 0}
  #define INIT2(w0, w1)	{w0, w1}

 #else /* _D0 == 0 */
  #define INIT(w0)		{0, w0}
  #define INIT2(w0, w1)	{w1, w0}
 #endif /* _D0 == 0 */

		/* static data */
extern /* const */ _Dconst _FDenorm = {INIT2(0, 1)};
extern /* const */ _Dconst _FEps = {
	INIT((_FBIAS - NBITS - 1) << _FOFF)};
extern /* const */ _Dconst _FInf = {INIT(_FMAX << _FOFF)};
extern /* const */ _Dconst _FNan = {INIT((_FMAX << _FOFF)
	| (1 << (_FOFF - 1)))};
extern /* const */ _Dconst _FSnan = {INIT2(_FMAX << _FOFF, 1)};
extern /* const */ _Dconst _FRteps = {
	INIT((_FBIAS - NBITS / 2) << _FOFF)};

extern /* const */ float _FXbig = (NBITS + 1) * 347L / 1000;
extern /* const */ float _FZero = 0.0F;
_C_STD_END

/*
 * Copyright (c) 1992-2007 by P.J. Plauger.  ALL RIGHTS RESERVED.
 * Consult your license regarding permissions and restrictions.
 V5.03:0009 */