third_party/libxml/src/trionan.h

   1 /*************************************************************************
   2  *
   3  * $Id$
   4  *
   5  * Copyright (C) 2001 Bjorn Reese <breese@users.sourceforge.net>
   6  *
   7  * Permission to use, copy, modify, and distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  12  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  13  * MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE AUTHORS AND
  14  * CONTRIBUTORS ACCEPT NO RESPONSIBILITY IN ANY CONCEIVABLE MANNER.
  15  *
  16  ************************************************************************/
  17
  18 #ifndef TRIO_NAN_H
  19 #define TRIO_NAN_H
  20
  21 #include "triodef.h"
  22
  23 #ifdef __cplusplus
  24 extern "C" {
  25 #endif
  26
  27 enum {
  28   TRIO_FP_INFINITE,
  29   TRIO_FP_NAN,
  30   TRIO_FP_NORMAL,
  31   TRIO_FP_SUBNORMAL,
  32   TRIO_FP_ZERO
  33 };
  34
  35 /*
  36  * Return NaN (Not-a-Number).
  37  */
  38 TRIO_PUBLIC double trio_nan TRIO_PROTO((void));
  39
  40 /*
  41  * Return positive infinity.
  42  */
  43 TRIO_PUBLIC double trio_pinf TRIO_PROTO((void));
  44
  45 /*
  46  * Return negative infinity.
  47  */
  48 TRIO_PUBLIC double trio_ninf TRIO_PROTO((void));
  49
  50 /*
  51  * Return negative zero.
  52  */
  53 TRIO_PUBLIC double trio_nzero TRIO_PROTO((TRIO_NOARGS));
  54
  55 /*
  56  * If number is a NaN return non-zero, otherwise return zero.
  57  */
  58 TRIO_PUBLIC int trio_isnan TRIO_PROTO((double number));
  59
  60 /*
  61  * If number is positive infinity return 1, if number is negative
  62  * infinity return -1, otherwise return 0.
  63  */
  64 TRIO_PUBLIC int trio_isinf TRIO_PROTO((double number));
  65
  66 /*
  67  * If number is finite return non-zero, otherwise return zero.
  68  */
  69 #if 0
  70         /* Temporary fix - these 2 routines not used in libxml */
  71 TRIO_PUBLIC int trio_isfinite TRIO_PROTO((double number));
  72
  73 TRIO_PUBLIC int trio_fpclassify TRIO_PROTO((double number));
  74 #endif
  75
  76 TRIO_PUBLIC int trio_signbit TRIO_PROTO((double number));
  77
  78 TRIO_PUBLIC int trio_fpclassify_and_signbit TRIO_PROTO((double number, int *is_negative));
  79
  80 #ifdef __cplusplus
  81 }
  82 #endif
  83
  84 #endif /* TRIO_NAN_H */