libstdc++-v3/testsuite/18_support/numeric_limits/digits10.cc

   1 // { dg-add-options ieee }
   2
   3 // 1999-08-23 bkoz
   4
   5 // Copyright (C) 1999-2018 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 // 18.2.1.1 template class numeric_limits
  23
  24 #include <limits>
  25 #include <limits.h>
  26 #include <float.h>
  27 #include <cwchar>
  28 #include <testsuite_hooks.h>
  29
  30 // libstdc++/5045
  31 void test03()
  32 {
  33   VERIFY( std::numeric_limits<bool>::digits10 == 0 );
  34   if (__CHAR_BIT__ == 8)
  35     {
  36       VERIFY( std::numeric_limits<signed char>::digits10 == 2 );
  37       VERIFY( std::numeric_limits<unsigned char>::digits10 == 2 );
  38     }
  39   if (__CHAR_BIT__ * sizeof(short) == 16)
  40     {
  41       VERIFY( std::numeric_limits<signed short>::digits10 == 4 );
  42       VERIFY( std::numeric_limits<unsigned short>::digits10 == 4 );
  43     }
  44   if (__CHAR_BIT__ * sizeof(int) == 32)
  45     {
  46       VERIFY( std::numeric_limits<signed int>::digits10 == 9 );
  47       VERIFY( std::numeric_limits<unsigned int>::digits10 == 9 );
  48     }
  49   if (__CHAR_BIT__ * sizeof(long long) == 64)
  50     {
  51       VERIFY( std::numeric_limits<signed long long>::digits10 == 18 );
  52       VERIFY( std::numeric_limits<unsigned long long>::digits10 == 19 );
  53     }
  54 }
  55
  56 int main()
  57 {
  58   test03();
  59
  60   return 0;
  61 }