Matt Turner
285 lines
6.4 KiB
C
285 lines
6.4 KiB
C
/**************************************************************************
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*
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* Copyright 2007-2013 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#ifndef _C99_COMPAT_H_
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#define _C99_COMPAT_H_
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/*
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* MSVC hacks.
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*/
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#if defined(_MSC_VER)
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/*
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* Visual Studio 2012 will complain if we define the `inline` keyword, but
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* actually it only supports the keyword on C++.
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*
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* To avoid this the _ALLOW_KEYWORD_MACROS must be set.
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*/
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# if (_MSC_VER >= 1700) && !defined(_ALLOW_KEYWORD_MACROS)
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# define _ALLOW_KEYWORD_MACROS
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# endif
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/*
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* XXX: MSVC has a `__restrict` keyword, but it also has a
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* `__declspec(restrict)` modifier, so it is impossible to define a
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* `restrict` macro without interfering with the latter. Furthermore the
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* MSVC standard library uses __declspec(restrict) under the _CRTRESTRICT
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* macro. For now resolve this issue by redefining _CRTRESTRICT, but going
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* forward we should probably should stop using restrict, especially
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* considering that our code does not obbey strict aliasing rules any way.
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*/
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# include <crtdefs.h>
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# undef _CRTRESTRICT
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# define _CRTRESTRICT
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#endif
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/*
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* C99 inline keyword
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*/
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#ifndef inline
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# ifdef __cplusplus
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/* C++ supports inline keyword */
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# elif defined(__GNUC__)
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# define inline __inline__
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# elif defined(_MSC_VER)
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# define inline __inline
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# elif defined(__ICL)
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# define inline __inline
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# elif defined(__INTEL_COMPILER)
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/* Intel compiler supports inline keyword */
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# elif defined(__WATCOMC__) && (__WATCOMC__ >= 1100)
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# define inline __inline
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# elif defined(__SUNPRO_C) && defined(__C99FEATURES__)
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/* C99 supports inline keyword */
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# elif (__STDC_VERSION__ >= 199901L)
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/* C99 supports inline keyword */
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# else
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# define inline
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# endif
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#endif
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/*
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* C99 restrict keyword
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*
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* See also:
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* - http://cellperformance.beyond3d.com/articles/2006/05/demystifying-the-restrict-keyword.html
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*/
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#ifndef restrict
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# if (__STDC_VERSION__ >= 199901L)
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/* C99 */
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# elif defined(__SUNPRO_C) && defined(__C99FEATURES__)
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/* C99 */
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# elif defined(__GNUC__)
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# define restrict __restrict__
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# elif defined(_MSC_VER)
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# define restrict __restrict
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# else
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# define restrict /* */
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# endif
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#endif
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/*
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* C99 __func__ macro
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*/
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#ifndef __func__
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# if (__STDC_VERSION__ >= 199901L)
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/* C99 */
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# elif defined(__SUNPRO_C) && defined(__C99FEATURES__)
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/* C99 */
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# elif defined(__GNUC__)
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# define __func__ __FUNCTION__
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# elif defined(_MSC_VER)
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# if _MSC_VER >= 1300
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# define __func__ __FUNCTION__
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# else
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# define __func__ "<unknown>"
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# endif
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# else
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# define __func__ "<unknown>"
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# endif
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#endif
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/* Simple test case for debugging */
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#if 0
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static inline const char *
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test_c99_compat_h(const void * restrict a,
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const void * restrict b)
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{
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return __func__;
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}
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#endif
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#if defined(_MSC_VER)
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#if _MSC_VER < 1400 && !defined(__cplusplus)
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static INLINE float cosf( float f )
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{
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return (float) cos( (double) f );
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}
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static INLINE float sinf( float f )
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{
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return (float) sin( (double) f );
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}
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static INLINE float ceilf( float f )
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{
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return (float) ceil( (double) f );
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}
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static INLINE float floorf( float f )
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{
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return (float) floor( (double) f );
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}
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static INLINE float powf( float f, float g )
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{
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return (float) pow( (double) f, (double) g );
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}
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static INLINE float sqrtf( float f )
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{
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return (float) sqrt( (double) f );
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}
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static INLINE float fabsf( float f )
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{
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return (float) fabs( (double) f );
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}
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static INLINE float logf( float f )
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{
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return (float) log( (double) f );
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}
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#else
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/* Work-around an extra semi-colon in VS 2005 logf definition */
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#ifdef logf
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#undef logf
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#define logf(x) ((float)log((double)(x)))
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#endif /* logf */
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#if _MSC_VER < 1800
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#define isfinite(x) _finite((double)(x))
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#define isnan(x) _isnan((double)(x))
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#endif /* _MSC_VER < 1800 */
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#endif /* _MSC_VER < 1400 && !defined(__cplusplus) */
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#if _MSC_VER < 1800
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static INLINE double log2( double x )
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{
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const double invln2 = 1.442695041;
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return log( x ) * invln2;
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}
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static INLINE double
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round(double x)
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{
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return x >= 0.0 ? floor(x + 0.5) : ceil(x - 0.5);
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}
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static INLINE float
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roundf(float x)
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{
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return x >= 0.0f ? floorf(x + 0.5f) : ceilf(x - 0.5f);
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}
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#endif
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#ifndef INFINITY
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#define INFINITY (DBL_MAX + DBL_MAX)
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#endif
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#ifndef NAN
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#define NAN (INFINITY - INFINITY)
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#endif
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#endif /* _MSC_VER */
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#if __STDC_VERSION__ < 199901L && (!defined(__cplusplus) || defined(_MSC_VER))
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static INLINE long int
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lrint(double d)
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{
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long int rounded = (long int)(d + 0.5);
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if (d - floor(d) == 0.5) {
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if (rounded % 2 != 0)
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rounded += (d > 0) ? -1 : 1;
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}
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return rounded;
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}
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static INLINE long int
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lrintf(float f)
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{
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long int rounded = (long int)(f + 0.5f);
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if (f - floorf(f) == 0.5f) {
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if (rounded % 2 != 0)
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rounded += (f > 0) ? -1 : 1;
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}
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return rounded;
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}
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static INLINE long long int
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llrint(double d)
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{
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long long int rounded = (long long int)(d + 0.5);
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if (d - floor(d) == 0.5) {
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if (rounded % 2 != 0)
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rounded += (d > 0) ? -1 : 1;
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}
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return rounded;
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}
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static INLINE long long int
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llrintf(float f)
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{
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long long int rounded = (long long int)(f + 0.5f);
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if (f - floorf(f) == 0.5f) {
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if (rounded % 2 != 0)
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rounded += (f > 0) ? -1 : 1;
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}
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return rounded;
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}
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#endif /* C99 */
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#endif /* _C99_COMPAT_H_ */
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