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/**************************************************************************
*
* Copyright 2007-2015 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/**
* Wrapper for math.h which makes sure we have definitions of all the c99
* functions.
*/
#ifndef _C99_MATH_H_
#define _C99_MATH_H_
#include <math.h>
#include "c99_compat.h"
#if defined(_MSC_VER)
/* This is to ensure that we get M_PI, etc. definitions */
#if !defined(_USE_MATH_DEFINES)
#error _USE_MATH_DEFINES define required when building with MSVC
#endif
#if _MSC_VER < 1800
#define isfinite(x) _finite((double)(x))
#define isnan(x) _isnan((double)(x))
#endif /* _MSC_VER < 1800 */
#if _MSC_VER < 1800
static inline double log2( double x )
{
const double invln2 = 1.442695041;
return log( x ) * invln2;
}
static inline double
round(double x)
{
return x >= 0.0 ? floor(x + 0.5) : ceil(x - 0.5);
}
static inline float
roundf(float x)
{
return x >= 0.0f ? floorf(x + 0.5f) : ceilf(x - 0.5f);
}
#endif
#ifndef INFINITY
#define INFINITY (DBL_MAX + DBL_MAX)
#endif
#ifndef NAN
#define NAN (INFINITY - INFINITY)
#endif
#endif /* _MSC_VER */
#if __STDC_VERSION__ < 199901L && (!defined(__cplusplus) || defined(_MSC_VER))
static inline long int
lrint(double d)
{
long int rounded = (long int)(d + 0.5);
if (d - floor(d) == 0.5) {
if (rounded % 2 != 0)
rounded += (d > 0) ? -1 : 1;
}
return rounded;
}
static inline long int
lrintf(float f)
{
long int rounded = (long int)(f + 0.5f);
if (f - floorf(f) == 0.5f) {
if (rounded % 2 != 0)
rounded += (f > 0) ? -1 : 1;
}
return rounded;
}
static inline long long int
llrint(double d)
{
long long int rounded = (long long int)(d + 0.5);
if (d - floor(d) == 0.5) {
if (rounded % 2 != 0)
rounded += (d > 0) ? -1 : 1;
}
return rounded;
}
static inline long long int
llrintf(float f)
{
long long int rounded = (long long int)(f + 0.5f);
if (f - floorf(f) == 0.5f) {
if (rounded % 2 != 0)
rounded += (f > 0) ? -1 : 1;
}
return rounded;
}
#endif /* C99 */
/*
* signbit() is a macro on Linux. Not available on Windows.
*/
#ifndef signbit
#define signbit(x) ((x) < 0.0f)
#endif
#ifndef M_PI
#define M_PI (3.14159265358979323846)
#endif
#ifndef M_E
#define M_E (2.7182818284590452354)
#endif
#ifndef M_LOG2E
#define M_LOG2E (1.4426950408889634074)
#endif
#ifndef FLT_MAX_EXP
#define FLT_MAX_EXP 128
#endif
#endif /* #define _C99_MATH_H_ */
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