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#ifndef INCLUDED_IMATHPLATFORM_H
36#define INCLUDED_IMATHPLATFORM_H
37
38//----------------------------------------------------------------------------
39//
40//	ImathPlatform.h
41//
42//	This file contains functions and constants which aren't
43//	provided by the system libraries, compilers, or includes on
44//	certain platforms.
45//
46//----------------------------------------------------------------------------
47
48#include <math.h>
49
50#ifndef M_PI
51    #define M_PI    3.14159265358979323846
52#endif
53
54#ifndef M_PI_2
55    #define M_PI_2  1.57079632679489661923 // pi/2
56#endif
57
58
59//-----------------------------------------------------------------------------
60//
61//    Some, but not all, C++ compilers support the C99 restrict
62//    keyword or some variant of it, for example, __restrict.
63//
64//-----------------------------------------------------------------------------
65
66#if defined __GNUC__
67
68    //
69    // supports __restrict
70    //
71
72    #define IMATH_RESTRICT __restrict
73
74#elif defined (__INTEL_COMPILER) || \
75      defined(__ICL) || \
76      defined(__ICC) || \
77      defined(__ECC)
78
79    //
80    // supports restrict
81    //
82
83    #define IMATH_RESTRICT restrict
84
85#elif defined __sgi
86
87    //
88    // supports restrict
89    //
90
91    #define IMATH_RESTRICT restrict
92
93#elif defined _MSC_VER
94
95    //
96    // supports __restrict
97    //
98
99//    #define IMATH_RESTRICT __restrict
100    #define IMATH_RESTRICT
101
102#else
103
104    //
105    // restrict / __restrict not supported
106    //
107
108    #define IMATH_RESTRICT
109
110#endif
111
112#endif // INCLUDED_IMATHPLATFORM_H
113