| // Copyright (C) 2010-2014 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/>. |
| |
| // { dg-require-fileio "" } |
| |
| #include <fstream> |
| #include <testsuite_hooks.h> |
| #include <testsuite_character.h> |
| |
| const char name_01[] = "tmp_seekoff_45628.tst"; |
| |
| unsigned underflows, overflows; |
| |
| class my_filebuf |
| : public std::basic_filebuf<__gnu_test::pod_uchar> |
| { |
| virtual int_type |
| underflow() |
| { |
| ++underflows; |
| return std::basic_filebuf<__gnu_test::pod_uchar>::underflow(); |
| } |
| virtual int_type |
| overflow(int_type c) |
| { |
| ++overflows; |
| return std::basic_filebuf<__gnu_test::pod_uchar>::overflow(c); |
| } |
| }; |
| |
| // libstdc++/45628 |
| void test01() |
| { |
| bool test __attribute__((unused)) = true; |
| |
| using __gnu_test::pod_uchar; |
| std::locale loc(std::locale::classic(), |
| new std::codecvt<my_filebuf::traits_type::char_type, char, |
| my_filebuf::traits_type::state_type>); |
| |
| my_filebuf::pos_type opos[3], ipos[3]; |
| my_filebuf q; |
| q.pubimbue(loc); |
| |
| q.open(name_01, std::ios_base::in | std::ios_base::out |
| | std::ios_base::trunc); |
| |
| q.sputc(pod_uchar::from<char>('a')); |
| opos[0] = q.pubseekoff(0, std::ios_base::cur); |
| q.sputc(pod_uchar::from<char>('b')); |
| opos[1] = q.pubseekoff(0, std::ios_base::cur); |
| q.sputc(pod_uchar::from<char>('c')); |
| opos[2] = q.pubseekoff(0, std::ios_base::cur); |
| |
| VERIFY( overflows <= 9 ); // pubseekoff calls overflow twice if converting. |
| // NB: checking opos==ipos is not very rigorous as long as it flushes, since |
| // all positions will be at initial state. |
| q.pubseekoff(0, std::ios_base::beg); |
| |
| q.sbumpc(); |
| VERIFY( underflows == 1 ); |
| |
| ipos[0] = q.pubseekoff(0, std::ios_base::cur); |
| VERIFY( ipos[0] == opos[0] ); |
| q.sbumpc(); |
| ipos[1] = q.pubseekoff(0, std::ios_base::cur); |
| VERIFY( ipos[1] == opos[1] ); |
| q.sbumpc(); |
| ipos[2] = q.pubseekoff(0, std::ios_base::cur); |
| VERIFY( ipos[2] == opos[2] ); |
| |
| VERIFY( underflows == 1 ); // pubseekoff never flushes get area |
| |
| // Bonus test: check automatic mode switches. |
| q.sputc(pod_uchar::from<char>('d')); |
| |
| q.pubseekpos( ipos[1] ); |
| q.sputc(pod_uchar::from<char>('e')); |
| |
| VERIFY( my_filebuf::traits_type::eq( |
| my_filebuf::traits_type::to_char_type(q.sgetc()), |
| pod_uchar::from<char>('d')) ); |
| } |
| |
| int main() |
| { |
| test01(); |
| return 0; |
| } |