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// 2001-05-21 Benjamin Kosnik <bkoz@redhat.com>
// Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING. If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// 27.8.1.4 Overridden virtual functions
#include <fstream>
#include <testsuite_hooks.h>
#include <testsuite_io.h>
// @require@ %-*.tst %-*.txt
// @diff@ %-*.tst %*.txt
const char name_01[] = "tmp_sungetc_1io.tst"; // empty file, need to create
void test01()
{
using namespace std;
using namespace __gnu_cxx_test;
typedef filebuf::int_type int_type;
typedef filebuf::traits_type traits_type;
typedef size_t size_type;
bool test = true;
streamsize strmsz_1, strmsz_2;
int_type c1, c2, c3;
// int_type sungetc()
// if in_cur not avail, return pbackfail(), else decrement and
// return to_int_type(*gptr())
// in | out
{
constraint_filebuf fb_01;
fb_01.open(name_01, ios_base::out | ios_base::in | ios_base::trunc);
VERIFY( !fb_01.write_position() );
VERIFY( !fb_01.read_position() );
fb_01.sputc('u');
fb_01.sputc('v');
fb_01.pubseekoff(-1, std::ios_base::end);
c3 = fb_01.sbumpc();
strmsz_1 = fb_01.in_avail();
c2 = fb_01.sungetc();
strmsz_2 = fb_01.in_avail();
VERIFY( c2 == 'v' ); // VERIFY( c2 != traits_type::eof() );
VERIFY( strmsz_1 + 1 == strmsz_2 );
//test for _in_cur == _in_end
fb_01.pubseekoff(0, std::ios_base::end);
strmsz_1 = fb_01.in_avail(); // -1 cuz at the end
c1 = fb_01.sgetc();
c2 = fb_01.sungetc();
strmsz_2 = fb_01.in_avail(); // 1
c3 = fb_01.sgetc();
VERIFY( c1 != c2 );
VERIFY( strmsz_2 != strmsz_1 );
VERIFY( strmsz_2 == 1 );
VERIFY( !fb_01.write_position() );
VERIFY( fb_01.read_position() );
}
}
main()
{
test01();
return 0;
}
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