source: NonGTP/OpenEXR/include/halfLimits.h @ 855

Revision 855, 3.8 KB checked in by igarcia, 19 years ago (diff)
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1///////////////////////////////////////////////////////////////////////////
2//
3// Copyright (c) 2002, Industrial Light & Magic, a division of Lucas
4// Digital Ltd. LLC
5//
6// All rights reserved.
7//
8// Redistribution and use in source and binary forms, with or without
9// modification, are permitted provided that the following conditions are
10// met:
11// *       Redistributions of source code must retain the above copyright
12// notice, this list of conditions and the following disclaimer.
13// *       Redistributions in binary form must reproduce the above
14// copyright notice, this list of conditions and the following disclaimer
15// in the documentation and/or other materials provided with the
16// distribution.
17// *       Neither the name of Industrial Light & Magic nor the names of
18// its contributors may be used to endorse or promote products derived
19// from this software without specific prior written permission.
20//
21// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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27// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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30// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32//
33///////////////////////////////////////////////////////////////////////////
34
35
36// Primary authors:
37//     Florian Kainz <kainz@ilm.com>
38//     Rod Bogart <rgb@ilm.com>
39
40
41#ifndef INCLUDED_HALF_LIMITS_H
42#define INCLUDED_HALF_LIMITS_H
43
44
45//------------------------------------------------------------------------
46//
47//      C++ standard library-style numeric_limits for class half
48//
49//------------------------------------------------------------------------
50
51#ifdef HAVE_STL_LIMITS
52#include <limits>
53#include <half.h>
54
55namespace std {
56
57template <>
58class numeric_limits <half>
59{
60  public:
61
62    static const bool is_specialized = true;
63
64    static half min () throw () {return HALF_NRM_MIN;}
65    static half max () throw () {return HALF_MAX;}
66
67    static const int digits = HALF_MANT_DIG;
68    static const int digits10 = HALF_DIG;
69    static const bool is_signed = true;
70    static const bool is_integer = false;
71    static const bool is_exact = false;
72    static const int radix = HALF_RADIX;
73    static half epsilon () throw () {return HALF_EPSILON;}
74    static half round_error () throw () {return HALF_EPSILON / 2;}
75
76    static const int min_exponent = HALF_MIN_EXP;
77    static const int min_exponent10 = HALF_MIN_10_EXP;
78    static const int max_exponent = HALF_MAX_EXP;
79    static const int max_exponent10 = HALF_MAX_10_EXP;
80
81    static const bool has_infinity = true;
82    static const bool has_quiet_NaN = true;
83    static const bool has_signaling_NaN = true;
84    static const float_denorm_style has_denorm = denorm_present;
85    static const bool has_denorm_loss = false;
86    static half infinity () throw () {return half::posInf();}
87    static half quiet_NaN () throw () {return half::qNan();}
88    static half signaling_NaN () throw () {return half::sNan();}
89    static half denorm_min () throw () {return HALF_MIN;}
90
91    static const bool is_iec559 = false;
92    static const bool is_bounded = false;
93    static const bool is_modulo = false;
94
95    static const bool traps = true;
96    static const bool tinyness_before = false;
97    static const float_round_style round_style = round_to_nearest;
98};
99
100
101} // namespace std
102
103#endif
104#endif
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