base/float_util.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef BASE_FLOAT_UTIL_H_
   6 #define BASE_FLOAT_UTIL_H_
   7
   8 #include "build/build_config.h"
   9
  10 #include <float.h>
  11
  12 #include <cmath>
  13
  14 namespace base {
  15
  16 template <typename Float>
  17 inline bool IsFinite(const Float& number) {
  18 #if defined(OS_POSIX)
  19   return std::isfinite(number) != 0;
  20 #elif defined(OS_WIN)
  21   return _finite(number) != 0;
  22 #endif
  23 }
  24
  25 template <typename Float>
  26 inline bool IsNaN(const Float& number) {
  27 #if defined(OS_POSIX)
  28   return std::isnan(number) != 0;
  29 #elif defined(OS_WIN)
  30   return _isnan(number) != 0;
  31 #endif
  32 }
  33
  34 }  // namespace base
  35
  36 #endif  // BASE_FLOAT_UTIL_H_