// 2001-05-21 Benjamin Kosnik // Copyright (C) 2001, 2002, 2003, 2009, 2010 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 // . // 27.8.1.4 Overridden virtual functions // { dg-require-fileio "" } #include #include #include // @require@ %-*.tst %-*.txt // @diff@ %-*.tst %*.txt const char name_01[] = "seekoff-2out.tst"; 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; bool test __attribute__((unused)) = true; streamsize strmsz_1; int_type c1; int_type c2; int_type c3; pos_type pt_1(off_type(-1)); pos_type pt_2(off_type(0)); off_type off_1 = 0; off_type off_2 = 0; // seekoff // pubseekoff(off_type off, ios_base::seekdir way, ios_base::openmode which) // alters the stream position to off // out { constraint_filebuf fb; fb.pubsetbuf(0, 0); fb.open(name_01, ios_base::out); VERIFY( fb.unbuffered() ); //beg strmsz_1 = fb.in_avail(); pt_1 = fb.pubseekoff(2, ios_base::beg); fb.in_avail(); off_1 = off_type(pt_1); VERIFY( off_1 > 0 ); c1 = fb.snextc(); //current in pointer +1 VERIFY( c1 == traits_type::eof() ); fb.pubseekoff(3, ios_base::beg); c2 = fb.sputc('\n'); //current in pointer +1 fb.pubseekoff(4, ios_base::beg); c3 = fb.sgetc(); VERIFY( c2 != c3 ); VERIFY( c3 == traits_type::eof() ); fb.pubsync(); c1 = fb.sgetc(); VERIFY( c1 == c3 ); //cur pt_2 = fb.pubseekoff(2, ios_base::cur); off_2 = off_type(pt_2); VERIFY( (off_2 == (off_1 + 2 + 1 + 1)) ); c1 = fb.snextc(); //current in pointer +1 VERIFY( c1 == traits_type::eof() ); fb.pubseekoff(0, ios_base::cur); c2 = fb.sputc('x'); //test current out pointer c3 = fb.sputc('\n'); fb.pubseekoff(0, ios_base::cur); c1 = fb.sgetc(); fb.pubsync(); c3 = fb.sgetc(); VERIFY( c1 == c3 ); //end pt_2 = fb.pubseekoff(0, ios_base::end); off_1 = off_type(pt_2); VERIFY( off_1 > off_2 ); //weak, but don't know exactly where it ends c3 = fb.sputc('\n'); strmsz_1 = fb.sputn("because because because. . .", 28); VERIFY( strmsz_1 == 28 ); fb.pubseekoff(-1, ios_base::end); fb.sgetc(); c1 = fb.sungetc(); // Defect? retval of sungetc is not necessarily the character ungotten. // So re-get it. c1 = fb.sgetc(); fb.pubsync(); c3 = fb.sgetc(); VERIFY( c1 == c3 ); VERIFY( fb.unbuffered() ); } } int main() { test05(); return 0; }