libstdc++-v3/testsuite/27_io/basic_streambuf/in_avail/char/9701-3.cc

   1 // Copyright (C) 2003 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 2, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING.  If not, write to the Free
  16 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  17 // USA.
  18
  19 // 27.5.2.2.3 Get area
  20
  21 #include <fstream>
  22 #include <testsuite_hooks.h>
  23
  24 class Derived_fbuf : public std::filebuf
  25 {
  26 public:
  27   const char_type* pub_egptr() const
  28   { return egptr(); }
  29
  30   const char_type* pub_gptr() const
  31   { return gptr(); }
  32 };
  33
  34 // libstdc++/9701 (in_avail)
  35 void test01()
  36 {
  37   using namespace std;
  38   bool test __attribute__((unused)) = true;
  39   const char* name = "tmp_file1";
  40
  41   Derived_fbuf df2;
  42   df2.open(name, ios_base::in | ios_base::out | ios_base::trunc);
  43
  44   df2.sputn("Comomoc", 7);
  45
  46   df2.pubseekoff(0, ios_base::beg);
  47   df2.sbumpc();
  48   df2.sputbackc('t');
  49
  50   VERIFY( df2.pub_gptr() < df2.pub_egptr() );
  51   VERIFY( df2.in_avail() == df2.pub_egptr() - df2.pub_gptr() );
  52 }
  53
  54 int
  55 main()
  56 {
  57   test01();
  58   return 0;
  59 }