libstdc++-v3/testsuite/27_io/basic_filebuf/sbumpc/char/9825.cc

   1 // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001-2022 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 // { dg-require-fileio "" }
  23
  24 #include <fstream>
  25 #include <testsuite_hooks.h>
  26
  27 const char name_06[] = "filebuf_virtuals-6.txt"; // empty file, need to create
  28
  29 // libstdc++/9825
  30 // filebuf::sputbackc breaks sbumpc
  31 void test12()
  32 {
  33   using namespace std;
  34
  35   filebuf fbuf;
  36
  37   fbuf.open(name_06, ios_base::in|ios_base::out|ios_base::trunc);
  38   fbuf.sputn("crazy bees!", 11);
  39   fbuf.pubseekoff(0, ios_base::beg);
  40   fbuf.sbumpc();
  41   fbuf.sputbackc('x');
  42   filebuf::int_type c = fbuf.sbumpc();
  43   VERIFY( c == 'x' );
  44   c = fbuf.sbumpc();
  45   VERIFY( c == 'r' );
  46   c = fbuf.sbumpc();
  47   VERIFY( c == 'a' );
  48   fbuf.close();
  49 }
  50
  51 int main()
  52 {
  53   test12();
  54   return 0;
  55 }