<commit_before>/**************************************************************************
 *
 * 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
#include <float.h> // DBL_MAX
#define INFINITY (DBL_MAX + DBL_MAX)
#endif

#ifndef NAN
#define NAN (INFINITY - INFINITY)
#endif

#endif /* _MSC_VER */


#if (defined(_MSC_VER) && _MSC_VER < 1800) || \
    (!defined(_MSC_VER) && \
     __STDC_VERSION__ < 199901L && \
     (!defined(_XOPEN_SOURCE) || _XOPEN_SOURCE < 600) && \
     !defined(__cplusplus))

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;
}

static inline float
exp2f(float f)
{
   return powf(2.0f, f);
}

#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
<commit_msg>c99_math: (trivial) implement exp2 for MSVC too<commit_after>/**************************************************************************
 *
 * 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
#include <float.h> // DBL_MAX
#define INFINITY (DBL_MAX + DBL_MAX)
#endif

#ifndef NAN
#define NAN (INFINITY - INFINITY)
#endif

#endif /* _MSC_VER */


#if (defined(_MSC_VER) && _MSC_VER < 1800) || \
    (!defined(_MSC_VER) && \
     __STDC_VERSION__ < 199901L && \
     (!defined(_XOPEN_SOURCE) || _XOPEN_SOURCE < 600) && \
     !defined(__cplusplus))

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;
}

static inline float
exp2f(float f)
{
   return powf(2.0f, f);
}

static inline double
exp2(double d)
{
   return pow(2.0, d);
}

#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

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