libstdc++-v3/testsuite/27_io/basic_stringbuf/overflow/char/9988.cc

   1 // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001-2020 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 27.8.1.4 Overridden virtual functions
  21
  22 #include <sstream>
  23 #include <testsuite_hooks.h>
  24
  25 class OverBuf : public std::stringbuf
  26 {
  27 public:
  28   int_type pub_overflow(int_type c = traits_type::eof())
  29   { return std::stringbuf::overflow(c); }
  30 };
  31
  32 // libstdc++/9988
  33 // filebuf::overflow writes EOF to file
  34 void test15()
  35 {
  36   using namespace std;
  37
  38   OverBuf sb;
  39
  40   sb.sputc('a');
  41   sb.pub_overflow('b');
  42   sb.pub_overflow();
  43   sb.sputc('c');
  44
  45   stringbuf sbin(sb.str(), ios_base::in);
  46   stringbuf::int_type c;
  47   c = sbin.sbumpc();
  48   VERIFY( c == 'a' );
  49   c = sbin.sbumpc();
  50   VERIFY( c == 'b' );
  51   c = sbin.sbumpc();
  52   VERIFY( c == 'c' );
  53   c = sbin.sbumpc();
  54   VERIFY( c == stringbuf::traits_type::eof() );
  55 }
  56
  57 int main()
  58 {
  59   test15();
  60   return 0;
  61 }