/************************************************************************* * * $Id$ * * Copyright (C) 2001 Bjorn Reese <breese@users.sourceforge.net> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE AUTHORS AND * CONTRIBUTORS ACCEPT NO RESPONSIBILITY IN ANY CONCEIVABLE MANNER. * ************************************************************************/ #ifndef TRIO_NAN_H #define TRIO_NAN_H #include "triodef.h" #ifdef __cplusplus extern "C" { #endif enum { TRIO_FP_INFINITE, TRIO_FP_NAN, TRIO_FP_NORMAL, TRIO_FP_SUBNORMAL, TRIO_FP_ZERO }; /* * Return NaN (Not-a-Number). */ TRIO_PUBLIC double trio_nan TRIO_PROTO((void)); /* * Return positive infinity. */ TRIO_PUBLIC double trio_pinf TRIO_PROTO((void)); /* * Return negative infinity. */ TRIO_PUBLIC double trio_ninf TRIO_PROTO((void)); /* * Return negative zero. */ TRIO_PUBLIC double trio_nzero TRIO_PROTO((TRIO_NOARGS)); /* * If number is a NaN return non-zero, otherwise return zero. */ TRIO_PUBLIC int trio_isnan TRIO_PROTO((double number)); /* * If number is positive infinity return 1, if number is negative * infinity return -1, otherwise return 0. */ TRIO_PUBLIC int trio_isinf TRIO_PROTO((double number)); /* * If number is finite return non-zero, otherwise return zero. */ #if 0 /* Temporary fix - these 2 routines not used in libxml */ TRIO_PUBLIC int trio_isfinite TRIO_PROTO((double number)); TRIO_PUBLIC int trio_fpclassify TRIO_PROTO((double number)); #endif TRIO_PUBLIC int trio_signbit TRIO_PROTO((double number)); TRIO_PUBLIC int trio_fpclassify_and_signbit TRIO_PROTO((double number, int *is_negative)); #ifdef __cplusplus } #endif #endif /* TRIO_NAN_H */