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comparison liboctave/lo-cieee.c @ 4072:3cc39e3b8fa5

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[project @ 2002-09-27 17:54:53 by jwe]
author jwe
date Fri, 27 Sep 2002 17:54:53 +0000
parents
children a67f76924703
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4071:3827a03c72f0 4072:3cc39e3b8fa5
1 /*
2
3 Copyright (C) 2002 John W. Eaton
4
5 This file is part of Octave.
6
7 Octave is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 2, or (at your option) any
10 later version.
11
12 Octave is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with Octave; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20
21 */
22
23 #ifdef HAVE_CONFIG_H
24 #include <config.h>
25 #endif
26
27 #include <float.h>
28 #include <math.h>
29
30 #if defined (HAVE_FLOATINGPOINT_H)
31 #include <floatingpoint.h>
32 #endif
33
34 #if defined (HAVE_IEEEFP_H)
35 #include <ieeefp.h>
36 #endif
37
38 #if defined (HAVE_NAN_H)
39 #if defined (SCO)
40 #define _IEEE 1
41 #endif
42 #include <nan.h>
43 #if defined (SCO)
44 #undef _IEEE
45 #endif
46 #endif
47
48 #include "lo-ieee.h"
49
50 #if defined (SCO)
51
52 int
53 isnan (double x)
54 {
55 return (IsNANorINF (x) && NaN (x) && ! IsINF (x)) ? 1 : 0;
56 }
57
58 int
59 isinf (double x)
60 {
61 return (IsNANorINF (x) && IsINF (x)) ? 1 : 0;
62 }
63
64 #endif
65
66 int
67 lo_ieee_is_NA (double x)
68 {
69 lo_ieee_double t;
70 t.value = x;
71 return (isnan (x) && t.word[lo_ieee_lw] == LO_IEEE_NA_LW) ? 1 : 0;
72 }
73
74 int
75 lo_ieee_is_NaN_or_NA (double x)
76 {
77 return isnan (x);
78 }
79
80 /*
81 ;;; Local Variables: ***
82 ;;; mode: C++ ***
83 ;;; End: ***
84 */