libstdc++-v3/testsuite/27_io/basic_ostream/inserters_other/wchar_t/4.cc

   1 // Copyright (C) 2005-2021 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // 27.6.2.5.4 basic_ostream character inserters
  19
  20 #include <ostream>
  21 #include <sstream>
  22 #include <testsuite_hooks.h>
  23
  24 class test_buffer_1 : public std::wstreambuf
  25 {
  26 public:
  27   test_buffer_1(const std::wstring& s)
  28   : str(s), it(str.begin()) { }
  29
  30 protected:
  31   virtual int_type
  32   underflow()
  33   { return (it != str.end() ? *it : WEOF); }
  34
  35   virtual int_type
  36   uflow()
  37   { return (it != str.end() ? *it++ : WEOF); }
  38
  39 private:
  40   const std::wstring str;
  41   std::wstring::const_iterator it;
  42 };
  43
  44
  45 class test_buffer_2 : public std::wstreambuf
  46 {
  47 public:
  48   test_buffer_2(const std::wstring& s)
  49   : str(s), it(str.begin()) { }
  50
  51 protected:
  52   virtual int_type
  53   underflow()
  54   { return (it != str.end() ? *it : WEOF); }
  55
  56   virtual int_type
  57   uflow()
  58   { return (it != str.end() ? *it++ : WEOF); }
  59
  60   virtual std::streamsize
  61   showmanyc()
  62   { return std::distance(it, str.end()); }
  63
  64 private:
  65   const std::wstring str;
  66   std::wstring::const_iterator it;
  67 };
  68
  69
  70 class test_buffer_3 : public std::wstreambuf
  71 {
  72 public:
  73   test_buffer_3(const std::wstring& s)
  74   : str(s), it(str.begin()) { }
  75
  76 protected:
  77   virtual int_type
  78   underflow()
  79   { return (it != str.end() ? *it : WEOF); }
  80
  81   virtual int_type
  82   uflow()
  83   { return (it != str.end() ? *it++ : WEOF); }
  84
  85   virtual std::streamsize
  86   showmanyc()
  87   {
  88     std::streamsize ret = std::distance(it, str.end());
  89     return ret > 0 ? ret : -1;
  90   }
  91
  92 private:
  93   const std::wstring str;
  94   std::wstring::const_iterator it;
  95 };
  96
  97 class test_buffer_4 : public std::wstreambuf
  98 {
  99 public:
 100   test_buffer_4(const std::wstring& s)
 101   : str(s), it(str.begin())
 102   {
 103     if (it != str.end())
 104       {
 105         buf[0] = *it++;
 106         setg(buf, buf, buf+1);
 107       }
 108   }
 109
 110 protected:
 111   virtual int_type
 112   underflow()
 113   { return (it != str.end() ? *it : WEOF); }
 114
 115   virtual int_type
 116   uflow()
 117   { return (it != str.end() ? *it++ : WEOF); }
 118
 119   virtual std::streamsize
 120   showmanyc()
 121   {
 122     std::streamsize ret = std::distance(it, str.end());
 123     return ret > 0 ? ret : -1;
 124   }
 125
 126 private:
 127   const std::wstring str;
 128   std::wstring::const_iterator it;
 129   wchar_t buf[1];
 130 };
 131
 132 void test(const std::wstring& str, std::wstreambuf& buf)
 133 {
 134   std::wostringstream out;
 135   std::wistream in(&buf);
 136
 137   out << in.rdbuf();
 138
 139   if (out.str() != str)
 140     VERIFY( false );
 141 }
 142
 143 // libstdc++/6745
 144 // libstdc++/8071
 145 // libstdc++/8127
 146 // Jonathan Lennox  <lennox@cs.columbia.edu>
 147 void test05()
 148 {
 149   std::wstring string_a(L"Hello, world!");
 150   std::wstring string_b(L"");
 151
 152   test_buffer_1 buf1a(string_a);
 153   test_buffer_1 buf1b(string_b);
 154
 155   test_buffer_2 buf2a(string_a);
 156   test_buffer_2 buf2b(string_b);
 157
 158   test_buffer_3 buf3a(string_a);
 159   test_buffer_3 buf3b(string_b);
 160
 161   test_buffer_4 buf4a(string_a);
 162   test_buffer_4 buf4b(string_b);
 163
 164   test(string_a, buf1a);
 165   test(string_b, buf1b);
 166
 167   test(string_a, buf2a);
 168   test(string_b, buf2b);
 169
 170   test(string_a, buf3a);
 171   test(string_b, buf3b);
 172
 173   test(string_a, buf4a);
 174   test(string_b, buf4b);
 175 }
 176
 177 int
 178 main()
 179 {
 180   test05();
 181   return 0;
 182 }