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

   1 // { dg-add-options ieee }
   2
   3 // 1999-08-23 bkoz
   4
   5 // Copyright (C) 1999-2016 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 bool test03()
  32 {
  33   bool test __attribute__((unused)) = true;
  34
  35   VERIFY( std::numeric_limits<bool>::digits10 == 0 );
  36   if (__CHAR_BIT__ == 8)
  37     {
  38       VERIFY( std::numeric_limits<signed char>::digits10 == 2 );
  39       VERIFY( std::numeric_limits<unsigned char>::digits10 == 2 );
  40     }
  41   if (__CHAR_BIT__ * sizeof(short) == 16)
  42     {
  43       VERIFY( std::numeric_limits<signed short>::digits10 == 4 );
  44       VERIFY( std::numeric_limits<unsigned short>::digits10 == 4 );
  45     }
  46   if (__CHAR_BIT__ * sizeof(int) == 32)
  47     {
  48       VERIFY( std::numeric_limits<signed int>::digits10 == 9 );
  49       VERIFY( std::numeric_limits<unsigned int>::digits10 == 9 );
  50     }
  51   if (__CHAR_BIT__ * sizeof(long long) == 64)
  52     {
  53       VERIFY( std::numeric_limits<signed long long>::digits10 == 18 );
  54       VERIFY( std::numeric_limits<unsigned long long>::digits10 == 19 );
  55     }
  56   return test;
  57 }
  58
  59 int main()
  60 {
  61   test03();
  62
  63   return 0;
  64 }