mirror of https://gitlab.freedesktop.org/mesa/mesa
165 lines
3.6 KiB
C
165 lines
3.6 KiB
C
/**************************************************************************
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*
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* Copyright 2007-2015 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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/**
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* Wrapper for math.h which makes sure we have definitions of all the c99
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* functions.
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*/
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#ifndef _C99_MATH_H_
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#define _C99_MATH_H_
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#include <math.h>
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#include "c99_compat.h"
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#if defined(_MSC_VER)
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/* This is to ensure that we get M_PI, etc. definitions */
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#if !defined(_USE_MATH_DEFINES)
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#error _USE_MATH_DEFINES define required when building with MSVC
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#endif
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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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#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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/*
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* signbit() is a macro on Linux. Not available on Windows.
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*/
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#ifndef signbit
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#define signbit(x) ((x) < 0.0f)
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#endif
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#ifndef M_PI
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#define M_PI (3.14159265358979323846)
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#endif
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#ifndef M_E
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#define M_E (2.7182818284590452354)
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#endif
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#ifndef M_LOG2E
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#define M_LOG2E (1.4426950408889634074)
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#endif
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#ifndef FLT_MAX_EXP
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#define FLT_MAX_EXP 128
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#endif
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#endif /* #define _C99_MATH_H_ */
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