libstdc++-v3/include/c/std_cmath.h

   1 // -*- C++ -*- forwarding header.
   2
   3 // Copyright (C) 2000, 2002, 2003 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 2, 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 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 //
  31 // ISO C++ 14882: 26.5  C library
  32 //
  33
  34 #ifndef _GLIBCXX_CMATH
  35 #define _GLIBCXX_CMATH 1
  36
  37 #pragma GCC system_header
  38
  39 #include <bits/c++config.h>
  40
  41 #include_next <math.h>
  42
  43 // Get rid of those macros defined in <math.h> in lieu of real functions.
  44 #undef abs
  45 #undef div
  46 #undef acos
  47 #undef asin
  48 #undef atan
  49 #undef atan2
  50 #undef ceil
  51 #undef cos
  52 #undef cosh
  53 #undef exp
  54 #undef fabs
  55 #undef floor
  56 #undef fmod
  57 #undef frexp
  58 #undef ldexp
  59 #undef log
  60 #undef log10
  61 #undef modf
  62 #undef pow
  63 #undef sin
  64 #undef sinh
  65 #undef sqrt
  66 #undef tan
  67 #undef tanh
  68
  69 #undef fpclassify
  70 #undef isfinite
  71 #undef isinf
  72 #undef isnan
  73 #undef isnormal
  74 #undef signbit
  75 #undef isgreater
  76 #undef isgreaterequal
  77 #undef isless
  78 #undef islessequal
  79 #undef islessgreater
  80 #undef isunordered
  81
  82 namespace std
  83 {
  84   inline double
  85   abs(double __x)
  86   { return __builtin_fabs(__x); }
  87
  88   inline float
  89   abs(float __x)
  90   { return __builtin_fabsf(__x); }
  91
  92   inline long double
  93   abs(long double __x)
  94   { return __builtin_fabsl(__x); }
  95
  96 #if _GLIBCXX_HAVE_MODFF
  97   inline float
  98   modf(float __x, float* __iptr) { return modff(__x, __iptr); }
  99 #else
 100   inline float
 101   modf(float __x, float* __iptr)
 102   {
 103     double __tmp;
 104     double __res = modf(static_cast<double>(__x), &__tmp);
 105     *__iptr = static_cast<float>(__tmp);
 106     return __res;
 107   }
 108 #endif
 109
 110 #if _GLIBCXX_HAVE_MODFL
 111   inline long double
 112   modf(long double __x, long double* __iptr) { return modfl(__x, __iptr); }
 113 #else
 114   inline long double
 115   modf(long double __x, long double* __iptr)
 116   {
 117     double __tmp;
 118     double __res = modf(static_cast<double>(__x), &__tmp);
 119     * __iptr = static_cast<long double>(__tmp);
 120     return __res;
 121   }
 122 #endif
 123 }
 124 #endif