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 _WIN32 || defined _WIN64 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 93