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// 2001-05-21 Benjamin Kosnik <bkoz@redhat.com>
// Copyright (C) 2001-2019 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 3, 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 COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// 27.8.1.4 Overridden virtual functions
// { dg-require-fileio "" }
#include <fstream>
#include <testsuite_hooks.h>
#include <testsuite_io.h>
// @require@ %-*.tst %-*.txt
// @diff@ %-*.tst %*.txt
const char name_01[] = "seekpos-2out.tst"; // file with data in it
void test05()
{
using namespace std;
using namespace __gnu_test;
typedef filebuf::int_type int_type;
typedef filebuf::pos_type pos_type;
typedef filebuf::off_type off_type;
typedef filebuf::traits_type traits_type;
int_type c1;
int_type c2;
int_type c3;
pos_type pt_1(off_type(-1));
pos_type pt_2(off_type(0));
pos_type pt_3;
off_type off_1 = 0;
off_type off_2 = 0;
// seekpos
// pubseekpos(pos_type sp, ios_base::openmode)
// alters the stream position to sp
// out
{
constraint_filebuf fb;
fb.pubsetbuf(0, 0);
fb.open(name_01, ios_base::out);
VERIFY( fb.unbuffered() );
// beg
pt_1 = fb.pubseekoff(78, ios_base::beg);
off_1 = off_type(pt_1);
VERIFY( off_1 > 0 );
c1 = fb.snextc(); //current in pointer +1
VERIFY( c1 == traits_type::eof() );
// cur
pt_3 = fb.pubseekoff(0, ios_base::cur);
fb.pubseekpos(pt_3);
c2 = fb.sputc('\n'); //test current out pointer
pt_3 = fb.pubseekoff(0, ios_base::cur);
fb.pubseekpos(pt_3);
c3 = fb.sgetc();
fb.pubsync(); //resets pointers
pt_2 = fb.pubseekpos(pt_1);
off_2 = off_type(pt_2);
VERIFY( off_1 == off_2 );
c3 = fb.snextc(); //current in pointer +1
VERIFY( c2 != c3 );
VERIFY( c3 == traits_type::eof() );
// end
pt_1 = fb.pubseekoff(0, ios_base::end);
off_1 = off_type(pt_1);
VERIFY( off_1 > off_2 );
fb.sputn("\nof the wonderful things he does!!\nok", 37);
fb.pubsync();
VERIFY( fb.unbuffered() );
fb.close();
VERIFY( !fb.is_open() );
}
}
int main()
{
test05();
return 0;
}
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