libstdc++-v3/testsuite/27_io/basic_ostream/inserters_arithmetic/char/hexfloat.cc

   1 // { dg-options "-std=gnu++11" }
   2
   3 // 2014-03-27 Rüdiger Sonderfeld
   4 // test the hexadecimal floating point inserters (facet num_put)
   5
   6 // Copyright (C) 2014 Free Software Foundation, Inc.
   7 //
   8 // This file is part of the GNU ISO C++ Library.  This library is free
   9 // software; you can redistribute it and/or modify it under the
  10 // terms of the GNU General Public License as published by the
  11 // Free Software Foundation; either version 3, or (at your option)
  12 // any later version.
  13
  14 // This library is distributed in the hope that it will be useful,
  15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 // GNU General Public License for more details.
  18
  19 // You should have received a copy of the GNU General Public License along
  20 // with this library; see the file COPYING3.  If not see
  21 // <http://www.gnu.org/licenses/>.
  22
  23 #include <iomanip>
  24 #include <sstream>
  25 #include <string>
  26 #include <testsuite_hooks.h>
  27
  28 #ifndef _GLIBCXX_ASSERT
  29 #  define TEST_NUMPUT_VERBOSE 1
  30 #endif
  31
  32 #ifdef TEST_NUMPUT_VERBOSE
  33 #  include <iostream>
  34 #endif
  35
  36 using namespace std;
  37
  38 void
  39 test01()
  40 {
  41   ostringstream os;
  42   double d = 272.; // 0x1.1p+8;
  43 #ifdef TEST_NUMPUT_VERBOSE
  44   cout << os.precision() << endl;
  45 #endif
  46   os << hexfloat << setprecision(1);
  47   os << d;
  48 #ifdef TEST_NUMPUT_VERBOSE
  49   cout << "got: " << os.str() << endl;
  50 #endif
  51   VERIFY( os && std::stod(os.str()) == d );
  52   VERIFY( os.str().substr(0, 2) == "0x" );
  53   VERIFY( os.str().find('p') != std::string::npos );
  54
  55   os.str("");
  56   os << uppercase << d;
  57 #ifdef TEST_NUMPUT_VERBOSE
  58   cout << "got: " << os.str() << endl;
  59 #endif
  60   VERIFY( os && std::stod(os.str()) == d );
  61   VERIFY( os.str().substr(0, 2) == "0X" );
  62   VERIFY( os.str().find('P') != std::string::npos );
  63
  64   os << nouppercase;
  65   os.str("");
  66   os << defaultfloat << setprecision(6);
  67   os << d;
  68 #ifdef TEST_NUMPUT_VERBOSE
  69   cout << "got: " << os.str() << endl;
  70 #endif
  71   VERIFY( os && os.str() == "272" );
  72
  73   os.str("");
  74   d = 15.; //0x1.ep+3;
  75   os << hexfloat << setprecision(1);
  76   os << d;
  77 #ifdef TEST_NUMPUT_VERBOSE
  78   cout << "got: " << os.str() << endl;
  79 #endif
  80   VERIFY( os && std::stod(os.str()) == d );
  81   os.str("");
  82   os << uppercase << d;
  83 #ifdef TEST_NUMPUT_VERBOSE
  84   cout << "got: " << os.str() << endl;
  85 #endif
  86   VERIFY( os && std::stod(os.str()) == d );
  87   os << nouppercase;
  88   os.str("");
  89   os << defaultfloat << setprecision(6);
  90   os << d;
  91 #ifdef TEST_NUMPUT_VERBOSE
  92   cout << "got: " << os.str() << endl;
  93 #endif
  94   VERIFY( os && os.str() == "15" );
  95 }
  96
  97 void
  98 test02()
  99 {
 100   ostringstream os;
 101   long double d = 272.L; // 0x1.1p+8L;
 102   os << hexfloat << setprecision(1);
 103   os << d;
 104 #ifdef TEST_NUMPUT_VERBOSE
 105   cout << "got: " << os.str() << endl;
 106 #endif
 107   VERIFY( os && std::stold(os.str()) == d );
 108   os.str("");
 109   os << uppercase << d;
 110 #ifdef TEST_NUMPUT_VERBOSE
 111   cout << "got: " << os.str() << endl;
 112 #endif
 113   VERIFY( os && std::stold(os.str()) == d );
 114   os << nouppercase;
 115   os.str("");
 116   os << defaultfloat << setprecision(6);
 117   os << d;
 118 #ifdef TEST_NUMPUT_VERBOSE
 119   cout << "got: " << os.str() << endl;
 120 #endif
 121   VERIFY( os && os.str() == "272" );
 122
 123   os.str("");
 124   os << hexfloat << setprecision(1);
 125   d = 15.; //0x1.ep+3;
 126   os << d;
 127 #ifdef TEST_NUMPUT_VERBOSE
 128   cout << "got: " << os.str() << endl;
 129 #endif
 130   VERIFY( os && std::stold(os.str()) == d );
 131   os.str("");
 132   os << uppercase << d;
 133 #ifdef TEST_NUMPUT_VERBOSE
 134   cout << "got: " << os.str() << endl;
 135 #endif
 136   VERIFY( os && std::stold(os.str()) == d );
 137   os << nouppercase;
 138   os.str("");
 139   os << defaultfloat << setprecision(6);
 140   os << d;
 141 #ifdef TEST_NUMPUT_VERBOSE
 142   cout << "got: " << os.str() << endl;
 143 #endif
 144   VERIFY( os && os.str() == "15" );
 145 }
 146
 147 int
 148 main()
 149 {
 150   test01();
 151   test02();
 152 }