PBRT
/home/felix/UBC/projects/AdaptiveLightfieldSampling/pbrt_v2/src/3rdparty/ilmbase-1.0.2/ImathPlatform.h
00001 
00002 //
00003 // Copyright (c) 2002, Industrial Light & Magic, a division of Lucas
00004 // Digital Ltd. LLC
00005 // 
00006 // All rights reserved.
00007 // 
00008 // Redistribution and use in source and binary forms, with or without
00009 // modification, are permitted provided that the following conditions are
00010 // met:
00011 // *       Redistributions of source code must retain the above copyright
00012 // notice, this list of conditions and the following disclaimer.
00013 // *       Redistributions in binary form must reproduce the above
00014 // copyright notice, this list of conditions and the following disclaimer
00015 // in the documentation and/or other materials provided with the
00016 // distribution.
00017 // *       Neither the name of Industrial Light & Magic nor the names of
00018 // its contributors may be used to endorse or promote products derived
00019 // from this software without specific prior written permission. 
00020 // 
00021 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00022 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00023 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
00024 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
00025 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00026 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
00027 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00028 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00029 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00030 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00031 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00032 //
00034 
00035 #ifndef INCLUDED_IMATHPLATFORM_H
00036 #define INCLUDED_IMATHPLATFORM_H
00037 
00038 //----------------------------------------------------------------------------
00039 //
00040 //      ImathPlatform.h
00041 //
00042 //      This file contains functions and constants which aren't 
00043 //      provided by the system libraries, compilers, or includes on 
00044 //      certain platforms.
00045 //
00046 //----------------------------------------------------------------------------
00047 
00048 #include <math.h>
00049 
00050 #ifndef M_PI
00051     #define M_PI    3.14159265358979323846
00052 #endif
00053 
00054 #ifndef M_PI_2
00055     #define M_PI_2  1.57079632679489661923 // pi/2
00056 #endif
00057 
00058 
00059 //-----------------------------------------------------------------------------
00060 //
00061 //    Some, but not all, C++ compilers support the C99 restrict
00062 //    keyword or some variant of it, for example, __restrict.
00063 //
00064 //-----------------------------------------------------------------------------
00065 
00066 #if defined __GNUC__
00067 
00068     //
00069     // supports __restrict
00070     //
00071 
00072     #define IMATH_RESTRICT __restrict
00073 
00074 #elif defined (__INTEL_COMPILER) || \
00075       defined(__ICL) || \
00076       defined(__ICC) || \
00077       defined(__ECC)
00078 
00079     //
00080     // supports restrict
00081     //
00082 
00083     #define IMATH_RESTRICT restrict
00084 
00085 #elif defined __sgi
00086 
00087     //
00088     // supports restrict
00089     //
00090 
00091     #define IMATH_RESTRICT restrict
00092 
00093 #elif defined _MSC_VER
00094 
00095     //
00096     // supports __restrict
00097     //
00098 
00099 //    #define IMATH_RESTRICT __restrict
00100     #define IMATH_RESTRICT
00101 
00102 #else
00103 
00104     //
00105     // restrict / __restrict not supported
00106     //
00107 
00108     #define IMATH_RESTRICT
00109 
00110 #endif
00111 
00112 #endif // INCLUDED_IMATHPLATFORM_H