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