libstdc++-v3/testsuite/27_io/basic_streambuf/sgetn/wchar_t/1.cc

   1 // 1999-10-11 bkoz
   2
   3 // Copyright (C) 1999-2024 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20
  21 // 27.5.2 template class basic_streambuf
  22
  23 #include <streambuf>
  24 #include <cwchar>
  25 #include <testsuite_hooks.h>
  26
  27 class testbuf : public std::wstreambuf
  28 {
  29 public:
  30
  31   // Typedefs:
  32   typedef std::wstreambuf::traits_type traits_type;
  33   typedef std::wstreambuf::char_type char_type;
  34
  35   testbuf(): std::wstreambuf()
  36   { }
  37
  38   void
  39   check_pointers()
  40   {
  41     VERIFY( !this->eback() );
  42     VERIFY( !this->gptr() );
  43     VERIFY( !this->egptr() );
  44     VERIFY( !this->pbase() );
  45     VERIFY( !this->pptr() );
  46     VERIFY( !this->epptr() );
  47   }
  48
  49   int_type
  50   pub_uflow()
  51   { return (this->uflow()); }
  52
  53   int_type
  54   pub_overflow(int_type __c = traits_type::eof())
  55   { return (this->overflow(__c)); }
  56
  57   int_type
  58   pub_pbackfail(int_type __c)
  59   { return (this->pbackfail(__c)); }
  60
  61   void
  62   pub_setg(wchar_t* beg, wchar_t* cur, wchar_t* end)
  63   { this->setg(beg, cur, end); }
  64
  65   void
  66   pub_setp(wchar_t* beg, wchar_t* end)
  67   { this->setp(beg, end); }
  68
  69 protected:
  70   int_type
  71   underflow()
  72   {
  73     int_type __retval = traits_type::eof();
  74     if (this->gptr() < this->egptr())
  75       __retval = traits_type::not_eof(0);
  76     return __retval;
  77   }
  78 };
  79
  80 void test02()
  81 {
  82   typedef testbuf::traits_type traits_type;
  83   typedef testbuf::int_type int_type;
  84
  85   wchar_t lit01[] = L"chicago underground trio/possible cube on delmark";
  86   size_t i01 = traits_type::length(lit01);
  87
  88   testbuf buf01;
  89
  90   // 27.5.2.1 basic_streambuf ctors
  91   // default ctor initializes
  92   // - all pointer members to null pointers
  93   // - locale to current global locale
  94   buf01.check_pointers();
  95   VERIFY( buf01.getloc() == std::locale() );
  96
  97   // 27.5.2.2.5 Put area
  98
  99   wchar_t carray01[i01];
 100   std::wmemset(carray01, 0, i01);
 101
 102   buf01.pub_setg(lit01, lit01, lit01 + i01);
 103   buf01.sgetn(carray01, 0);
 104   VERIFY( carray01[0] == 0 );
 105   buf01.sgetn(carray01, 1);
 106   VERIFY( carray01[0] == L'c' );
 107   buf01.sgetn(carray01 + 1, i01 - 1);
 108   VERIFY( carray01[0] == L'c' );
 109   VERIFY( carray01[1] == L'h' );
 110   VERIFY( carray01[i01 - 1] == L'k' );
 111 }
 112
 113 int main()
 114 {
 115   test02();
 116   return 0;
 117 }