/src/FreeImage/Source/OpenEXR/Imath/ImathPlatform.h

  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:
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 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
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 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