libstdc++-v3/include/c/cmath

   1 // -*- C++ -*- forwarding header.
   2
   3 // Copyright (C) 2000-2014 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // Under Section 7 of GPL version 3, you are granted additional
  17 // permissions described in the GCC Runtime Library Exception, version
  18 // 3.1, as published by the Free Software Foundation.
  19
  20 // You should have received a copy of the GNU General Public License and
  21 // a copy of the GCC Runtime Library Exception along with this program;
  22 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 // <http://www.gnu.org/licenses/>.
  24
  25 //
  26 // ISO C++ 14882: 26.5  C library
  27 //
  28
  29 #ifndef _GLIBCXX_CMATH
  30 #define _GLIBCXX_CMATH 1
  31
  32 #pragma GCC system_header
  33
  34 #include <bits/c++config.h>
  35
  36 #include_next <math.h>
  37
  38 // Get rid of those macros defined in <math.h> in lieu of real functions.
  39 #undef abs
  40 #undef div
  41 #undef acos
  42 #undef asin
  43 #undef atan
  44 #undef atan2
  45 #undef ceil
  46 #undef cos
  47 #undef cosh
  48 #undef exp
  49 #undef fabs
  50 #undef floor
  51 #undef fmod
  52 #undef frexp
  53 #undef ldexp
  54 #undef log
  55 #undef log10
  56 #undef modf
  57 #undef pow
  58 #undef sin
  59 #undef sinh
  60 #undef sqrt
  61 #undef tan
  62 #undef tanh
  63
  64 #undef fpclassify
  65 #undef isfinite
  66 #undef isinf
  67 #undef isnan
  68 #undef isnormal
  69 #undef signbit
  70 #undef isgreater
  71 #undef isgreaterequal
  72 #undef isless
  73 #undef islessequal
  74 #undef islessgreater
  75 #undef isunordered
  76
  77 namespace std _GLIBCXX_VISIBILITY(default)
  78 {
  79   inline double
  80   abs(double __x)
  81   { return __builtin_fabs(__x); }
  82
  83   inline float
  84   abs(float __x)
  85   { return __builtin_fabsf(__x); }
  86
  87   inline long double
  88   abs(long double __x)
  89   { return __builtin_fabsl(__x); }
  90
  91 #if _GLIBCXX_HAVE_MODFF
  92   inline float
  93   modf(float __x, float* __iptr) { return modff(__x, __iptr); }
  94 #else
  95   inline float
  96   modf(float __x, float* __iptr)
  97   {
  98     double __tmp;
  99     double __res = modf(static_cast<double>(__x), &__tmp);
 100     *__iptr = static_cast<float>(__tmp);
 101     return __res;
 102   }
 103 #endif
 104
 105 #if _GLIBCXX_HAVE_MODFL
 106   inline long double
 107   modf(long double __x, long double* __iptr) { return modfl(__x, __iptr); }
 108 #else
 109   inline long double
 110   modf(long double __x, long double* __iptr)
 111   {
 112     double __tmp;
 113     double __res = modf(static_cast<double>(__x), &__tmp);
 114     * __iptr = static_cast<long double>(__tmp);
 115     return __res;
 116   }
 117 #endif
 118 }
 119 #endif