gomp-20050608-branch/libstdc++-v3/testsuite/27_io/basic_filebuf/seekpos/12790-2.cc

   1 // Copyright (C) 2003, 2005 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  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::pod_uchar;
  31   typedef basic_filebuf<pod_uchar>::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<pod_uchar> fb;
  41   fb.pubimbue(loc);
  42
  43   fb.open(name, ios_base::out | ios_base::trunc);
  44   fb.sputc(pod_uchar::from<char>('b'));
  45   fb.sputc(pod_uchar::from<char>(0xff));
  46   fb.sputc(pod_uchar::from<char>('a'));
  47   fb.sputc(pod_uchar::from<char>(0xfc));
  48   fb.sputc(pod_uchar::from<char>(0));
  49   fb.sputc(pod_uchar::from<char>(0));
  50
  51   fb.close();
  52   fb.open(name, ios_base::in);
  53
  54   fb.sbumpc();
  55   fb.sbumpc();
  56   traits_type::pos_type pos1 = fb.pubseekoff(0, ios_base::cur);
  57   fb.sbumpc();
  58   fb.sbumpc();
  59
  60   // Check that seekpos returns the correct state
  61   traits_type::pos_type pos2 = fb.pubseekpos(pos1);
  62   traits_type::int_type c = fb.sbumpc();
  63   VERIFY( c != traits_type::eof() );
  64   VERIFY( traits_type::eq(traits_type::to_char_type(c),
  65                           pod_uchar::from<char>('a')) );
  66   fb.sbumpc();
  67
  68   fb.pubseekpos(pos2);
  69   c = fb.sbumpc();
  70   VERIFY( c != traits_type::eof() );
  71   VERIFY( traits_type::eq(traits_type::to_char_type(c),
  72                           pod_uchar::from<char>('a')) );
  73
  74   fb.close();
  75 }
  76
  77 int main()
  78 {
  79   test01();
  80   return 0;
  81 }