Leaked source code of windows server 2003
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/* _LDtest function -- IEEE 754 version */#include "wctype.h"
#include "xmath.h"
_STD_BEGIN
#if !_DLONG
_CRTIMP2 short _LDtest(long double *px) { /* categorize *px */ return (_Dtest((double *)px)); }#elif _LONG_DOUBLE_HAS_HIDDEN_BIT
_CRTIMP2 short _LDtest(long double *px) { /* categorize *px -- SPARC */ unsigned short *ps = (unsigned short *)px; short xchar = ps[_L0] & _LMASK;
if (xchar == _LMAX) return (ps[_L1] != 0 || ps[_L2] != 0 || ps[_L3] != 0 || ps[_L4] != 0 || ps[_L5] != 0 || ps[_L6] != 0 || ps[_L7] != 0 ? NAN : INF); else if (0 < xchar || ps[_L1] || ps[_L2] || ps[_L3] || ps[_L4] || ps[_L5] || ps[_L6] || ps[_L7]) return (FINITE); else return (0); }#else /* _DLONG && !_LONG_DOUBLE_HAS_HIDDEN_BIT */
_CRTIMP2 short _LDtest(long double *px) { /* categorize *px */ unsigned short *ps = (unsigned short *)px; short xchar = ps[_L0] & _LMASK;
if (xchar == _LMAX) return ((ps[_L1] & 0x7fff) != 0 || ps[_L2] != 0 || ps[_L3] != 0 || ps[_L4] != 0 ? NAN : INF); else if (0 < xchar || ps[_L1] != 0 || ps[_L2] || ps[_L3] || ps[_L4]) return (FINITE); else return (0); }#endif
_STD_END
/*
* Copyright (c) 1994 by P.J. Plauger. ALL RIGHTS RESERVED. * Consult your license regarding permissions and restrictions. */
/*
941029 pjp: added _STD machinery */
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