libstdc++-v3/testsuite/27_io/basic_ostream/inserters_arithmetic/char/1.cc

   1 // 1999-11-15 Kevin Ediger  <kediger@licor.com>
   2 // test the floating point inserters (facet num_put)
   3
   4 // Copyright (C) 1999-2014 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 #include <iostream>
  22 #include <iomanip>
  23 #include <sstream>
  24 #include <limits>
  25 #include <testsuite_hooks.h>
  26
  27 using namespace std;
  28
  29 #ifndef _GLIBCXX_ASSERT
  30 #  define TEST_NUMPUT_VERBOSE 1
  31 #endif
  32
  33 struct _TestCase
  34 {
  35   double val;
  36
  37   int precision;
  38   int width;
  39   char decimal;
  40   char fill;
  41
  42   bool fixed;
  43   bool scientific;
  44   bool showpos;
  45   bool showpoint;
  46   bool uppercase;
  47   bool internal;
  48   bool left;
  49   bool right;
  50
  51   const char* result;
  52 };
  53
  54 static bool T=true;
  55 static bool F=false;
  56
  57 static _TestCase testcases[] =
  58 {
  59   // standard output (no formatting applied)
  60   { 1.2, 6,0,'.',' ', F,F,F,F,F,F,F,F, "1.2" },
  61   { 54, 6,0,'.',' ', F,F,F,F,F,F,F,F, "54" },
  62   { -.012, 6,0,'.',' ', F,F,F,F,F,F,F,F, "-0.012" },
  63   { -.00000012, 6,0,'.',' ', F,F,F,F,F,F,F,F, "-1.2e-07" },
  64
  65   // fixed formatting
  66   { 10.2345, 0,0,'.',' ', T,F,F,F,F,F,F,F, "10" },
  67   { 10.2345, 0,0,'.',' ', T,F,F,T,F,F,F,F, "10." },
  68   { 10.2345, 1,0,'.',' ', T,F,F,F,F,F,F,F, "10.2" },
  69   { 10.2345, 4,0,'.',' ', T,F,F,F,F,F,F,F, "10.2345" },
  70   { 10.2345, 6,0,'.',' ', T,F,T,F,F,F,F,F, "+10.234500" },
  71   { -10.2345, 6,0,'.',' ', T,F,F,F,F,F,F,F, "-10.234500" },
  72   { -10.2345, 6,0,',',' ', T,F,F,F,F,F,F,F, "-10,234500" },
  73
  74   // fixed formatting with width
  75   { 10.2345, 4,5,'.',' ', T,F,F,F,F,F,F,F, "10.2345" },
  76   { 10.2345, 4,6,'.',' ', T,F,F,F,F,F,F,F, "10.2345" },
  77   { 10.2345, 4,7,'.',' ', T,F,F,F,F,F,F,F, "10.2345" },
  78   { 10.2345, 4,8,'.',' ', T,F,F,F,F,F,F,F, " 10.2345" },
  79   { 10.2345, 4,10,'.',' ', T,F,F,F,F,F,F,F, "   10.2345" },
  80   { 10.2345, 4,10,'.',' ', T,F,F,F,F,F,T,F, "10.2345   " },
  81   { 10.2345, 4,10,'.',' ', T,F,F,F,F,F,F,T, "   10.2345" },
  82   { 10.2345, 4,10,'.',' ', T,F,F,F,F,T,F,F, "   10.2345" },
  83   { -10.2345, 4,10,'.',' ', T,F,F,F,F,T,F,F, "-  10.2345" },
  84   { -10.2345, 4,10,'.','A', T,F,F,F,F,T,F,F, "-AA10.2345" },
  85   { 10.2345, 4,10,'.','#', T,F,T,F,F,T,F,F, "+##10.2345" },
  86
  87   // scientific formatting
  88   { 1.23e+12, 1,0,'.',' ', F,T,F,F,F,F,F,F, "1.2e+12" },
  89   { 1.23e+12, 1,0,'.',' ', F,T,F,F,T,F,F,F, "1.2E+12" },
  90   { 1.23e+12, 2,0,'.',' ', F,T,F,F,F,F,F,F, "1.23e+12" },
  91   { 1.23e+12, 3,0,'.',' ', F,T,F,F,F,F,F,F, "1.230e+12" },
  92   { 1.23e+12, 3,0,'.',' ', F,T,T,F,F,F,F,F, "+1.230e+12" },
  93   { -1.23e-12, 3,0,'.',' ', F,T,F,F,F,F,F,F, "-1.230e-12" },
  94   { 1.23e+12, 3,0,',',' ', F,T,F,F,F,F,F,F, "1,230e+12" },
  95 };
  96
  97 template<typename _CharT>
  98 class testpunct : public numpunct<_CharT>
  99 {
 100 public:
 101   typedef _CharT  char_type;
 102   const char_type dchar;
 103
 104   explicit
 105   testpunct(char_type decimal_char) : numpunct<_CharT>(), dchar(decimal_char)
 106   { }
 107
 108 protected:
 109   char_type
 110   do_decimal_point() const
 111   { return dchar; }
 112
 113   char_type
 114   do_thousands_sep() const
 115   { return ','; }
 116
 117   string
 118   do_grouping() const
 119   { return string(); }
 120 };
 121
 122 template<typename _CharT>
 123 void apply_formatting(const _TestCase & tc, basic_ostream<_CharT> & os)
 124 {
 125   os.precision(tc.precision);
 126   os.width(tc.width);
 127   os.fill(static_cast<_CharT>(tc.fill));
 128   if (tc.fixed)
 129     os.setf(ios::fixed);
 130   if (tc.scientific)
 131     os.setf(ios::scientific);
 132   if (tc.showpos)
 133     os.setf(ios::showpos);
 134   if (tc.showpoint)
 135     os.setf(ios::showpoint);
 136   if (tc.uppercase)
 137     os.setf(ios::uppercase);
 138   if (tc.internal)
 139     os.setf(ios::internal);
 140   if (tc.left)
 141     os.setf(ios::left);
 142   if (tc.right)
 143     os.setf(ios::right);
 144 }
 145
 146 void
 147 test01()
 148 {
 149   bool test __attribute__((unused)) = true;
 150   for (std::size_t j = 0; j<sizeof(testcases)/sizeof(testcases[0]); j++)
 151     {
 152       _TestCase & tc = testcases[j];
 153 #ifdef TEST_NUMPUT_VERBOSE
 154       cout << "expect: " << tc.result << endl;
 155 #endif
 156       // test double with char type
 157       {
 158         testpunct<char>* __tp = new testpunct<char>(tc.decimal);
 159         ostringstream os;
 160         locale __loc(os.getloc(), __tp);
 161         os.imbue(__loc);
 162         apply_formatting(tc, os);
 163         os << tc.val;
 164 #ifdef TEST_NUMPUT_VERBOSE
 165         cout << j << "result 1: " << os.str() << endl;
 166 #endif
 167         VERIFY( os && os.str() == tc.result );
 168       }
 169       // test long double with char type
 170       {
 171         testpunct<char>* __tp = new testpunct<char>(tc.decimal);
 172         ostringstream os;
 173         locale __loc(os.getloc(), __tp);
 174         os.imbue(__loc);
 175         apply_formatting(tc, os);
 176         os << (long double)tc.val;
 177 #ifdef TEST_NUMPUT_VERBOSE
 178         cout << j << "result 2: " << os.str() << endl;
 179 #endif
 180         VERIFY( os && os.str() == tc.result );
 181       }
 182     }
 183 }
 184
 185 int
 186 main()
 187 {
 188   test01();
 189   return 0;
 190 }