diff options
Diffstat (limited to 'libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/char/45628-1.cc')
-rw-r--r-- | libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/char/45628-1.cc | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/char/45628-1.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/char/45628-1.cc new file mode 100644 index 000000000..a80a33876 --- /dev/null +++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/char/45628-1.cc @@ -0,0 +1,79 @@ +// Copyright (C) 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 +// <http://www.gnu.org/licenses/>. + +// { dg-require-fileio "" } + +#include <fstream> +#include <testsuite_hooks.h> + +const char name_01[] = "tmp_seekoff_45628.tst"; + +unsigned underflows, overflows; + +class my_filebuf +: public std::filebuf +{ + virtual int_type + underflow() + { + ++underflows; + return std::filebuf::underflow(); + } + virtual int_type + overflow(int_type c) + { + ++overflows; + return std::filebuf::overflow(c); + } +}; + +// libstdc++/45628 +void test01() +{ + bool test __attribute__((unused)) = true; + + my_filebuf q; + q.open(name_01, std::ios_base::in | std::ios_base::out + | std::ios_base::trunc); + + q.sputc('a'); + q.pubseekoff(0, std::ios_base::cur); + q.sputc('b'); + q.pubseekoff(0, std::ios_base::cur); + q.sputc('c'); + q.pubseekoff(0, std::ios_base::cur); + + VERIFY( overflows <= 1 ); // only initial sputc allowed to overflow + q.pubseekoff(0, std::ios_base::beg); + + q.sbumpc(); + VERIFY( underflows == 1 ); + + q.pubseekoff(0, std::ios_base::cur); + q.sbumpc(); + q.pubseekoff(0, std::ios_base::cur); + q.sbumpc(); + q.pubseekoff(0, std::ios_base::cur); + + VERIFY( underflows == 1 ); +} + +int main() +{ + test01(); + return 0; +} |