source: NonGTP/OpenEXR/include/Imath/ImathPlatform.h @ 855

Revision 855, 3.5 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,
26// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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
37#ifndef INCLUDED_IMATHPLATFORM_H
38#define INCLUDED_IMATHPLATFORM_H
39
40//----------------------------------------------------------------------------
41//
42//      ImathPlatform.h
43//
44//      This file contains functions and constants which aren't
45//      provided by the system libraries, compilers, or includes on
46//      certain platforms.
47//----------------------------------------------------------------------------
48
49#include <math.h>
50
51#if defined(PLATFORM_WINDOWS)
52    #ifndef M_PI
53        #define M_PI 3.14159265358979323846
54    #endif
55#endif
56
57//-----------------------------------------------------------------------------
58//
59//    Fixes for the "restrict" keyword.  These #ifdef's for detecting
60//    compiler versions courtesy of Boost's select_compiler_config.hpp;
61//    here is the copyright notice for that file:
62//
63//    (C) Copyright Boost.org 2001. Permission to copy, use, modify, sell and
64//    and distribute this software is granted provided this copyright notice
65//    appears in all copies. This software is provided "as is" without express
66//    or implied warranty, and with no claim as to its suitability for any
67//    purpose.
68//
69//    Some compilers support "restrict", in which case we do nothing.
70//    Other compilers support some variant of it (e.g. "__restrict").
71//    If we don't know anything about the compiler, we define "restrict"
72//    to be a no-op.
73//
74//-----------------------------------------------------------------------------
75
76#if defined __GNUC__
77    #if !defined(restrict)
78        #define restrict __restrict
79    #endif
80
81#elif defined(__INTEL_COMPILER) || defined(__ICL) || defined(__ICC) || defined(__ECC)
82    // supports restrict, do nothing.
83
84#elif defined __sgi
85    // supports restrict, do nothing.
86
87#else
88    #define restrict
89
90#endif
91
92#endif // INCLUDED_IMATHPLATFORM_H
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