libstdc++-v3/testsuite/27_io/basic_filebuf/seekpos/12790-3.cc

   1 // Copyright (C) 2003 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 2, 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 COPYING.  If not, write to the Free
  16 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  17 // USA.
  18
  19 // 27.8.1.4 Overridden virtual functions
  20
  21 #include <locale>
  22 #include <fstream>
  23 #include <testsuite_hooks.h>
  24 #include <testsuite_character.h>
  25
  26 // libstdc++/12790
  27 void test01()
  28 {
  29   using namespace std;
  30   using __gnu_test::character;
  31   typedef basic_filebuf<character>::traits_type traits_type;
  32
  33   bool test __attribute__((unused)) = true;
  34   const char* name = "tmp_seekpos_12790";
  35
  36   locale loc(locale::classic(),
  37              new codecvt<traits_type::char_type, char,
  38              traits_type::state_type>);
  39
  40   basic_filebuf<character> fb;
  41   fb.pubimbue(loc);
  42
  43   fb.open(name, ios_base::in | ios_base::out | ios_base::trunc);
  44   fb.sputc(character::from_char('b'));
  45   fb.sputc(character::from_char(0xff));
  46   fb.sputc(character::from_char('c'));
  47   fb.sputc(character::from_char(0xff));
  48
  49   fb.pubseekoff(0, ios_base::beg);
  50   fb.sbumpc();
  51   fb.sbumpc();
  52   traits_type::pos_type pos = fb.pubseekoff(0, ios_base::cur);
  53   fb.sbumpc();
  54   fb.sbumpc();
  55
  56   // Check that seekoff sets the current state for output
  57   fb.pubseekpos(pos);
  58
  59   fb.sputc(character::from_char('a'));
  60   fb.sputc(character::from_char(0));
  61   fb.sputc(character::from_char(0));
  62   fb.sputc(character::from_char(0));
  63   fb.sputc(character::from_char(0));
  64
  65   fb.pubseekpos(pos);
  66
  67   traits_type::int_type c = fb.sbumpc();
  68   VERIFY( c != traits_type::eof() );
  69   VERIFY( traits_type::eq(traits_type::to_char_type(c),
  70                           character::from_char('a')) );
  71
  72   fb.close();
  73 }
  74
  75 int main()
  76 {
  77   test01();
  78   return 0;
  79 }