| // 1999-10-11 bkoz |
| |
| // Copyright (C) 1999, 2000, 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. |
| |
| // As a special exception, you may use this file as part of a free software |
| // library without restriction. Specifically, if other files instantiate |
| // templates or use macros or inline functions from this file, or you compile |
| // this file and link it with other files to produce an executable, this |
| // file does not by itself cause the resulting executable to be covered by |
| // the GNU General Public License. This exception does not however |
| // invalidate any other reasons why the executable file might be covered by |
| // the GNU General Public License. |
| |
| // 27.5.2 template class basic_streambuf |
| |
| #include <fstream> |
| #include <testsuite_hooks.h> |
| |
| class setpbuf : public std::filebuf |
| { |
| char buffer[4]; |
| std::string result; |
| |
| public: |
| |
| std::string& |
| get_result() |
| { return result; } |
| |
| setpbuf() |
| { |
| this->open("tmp_1057", std::ios_base::out | std::ios_base::trunc); |
| char foo [32]; |
| setp(foo, foo + 32); |
| setp(buffer, buffer + 4); |
| } |
| |
| ~setpbuf() |
| { |
| sync(); |
| close(); |
| } |
| |
| virtual int_type |
| overflow(int_type n) |
| { |
| if (sync() != 0) |
| return traits_type::eof(); |
| |
| result += traits_type::to_char_type(n); |
| |
| return n; |
| } |
| |
| virtual int |
| sync() |
| { |
| result.append(pbase(), pptr()); |
| setp(buffer, buffer + 4); |
| return 0; |
| } |
| }; |
| |
| // libstdc++/1057 |
| void test04() |
| { |
| bool test __attribute__((unused)) = true; |
| std::string text = "abcdefghijklmn"; |
| |
| // 01 |
| setpbuf sp1; |
| // Here xsputn writes over sp1.result |
| sp1.sputn(text.c_str(), text.length()); |
| |
| // This crashes when result is accessed |
| sp1.pubsync(); |
| VERIFY( sp1.get_result() == text ); |
| |
| // 02 |
| setpbuf sp2; |
| for (std::string::size_type i = 0; i < text.length(); ++i) |
| { |
| // sputc also writes over result |
| sp2.sputc(text[i]); |
| } |
| |
| // Crash here |
| sp2.pubsync(); |
| VERIFY( sp2.get_result() == text ); |
| } |
| |
| int main() |
| { |
| test04(); |
| return 0; |
| } |