| // 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
| // 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[] = "seekoff-1out.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, strmsz_2; |
| |
| 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.open(name_01, ios_base::out); |
| VERIFY( !fb.write_position() ); |
| VERIFY( !fb.read_position() ); |
| |
| //beg |
| strmsz_1 = fb.in_avail(); |
| pt_1 = fb.pubseekoff(2, ios_base::beg); |
| strmsz_2 = 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.write_position() ); |
| VERIFY( !fb.read_position() ); |
| } |
| } |
| |
| int main() |
| { |
| test05(); |
| return 0; |
| } |