libstdc++-v3/testsuite/27_io/basic_stringbuf/seekoff/char/2.cc

   1 // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001, 2002, 2003, 2009 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 // 27.7.1.3 Overridden virtual functions
  21
  22 #include <sstream>
  23 #include <testsuite_hooks.h>
  24
  25 void test02(std::stringbuf& in, bool pass)
  26 {
  27   bool test __attribute__((unused)) = true;
  28   using namespace std;
  29   typedef streambuf::pos_type pos_type;
  30   typedef streambuf::off_type off_type;
  31   pos_type bad = pos_type(off_type(-1));
  32   pos_type p = 0;
  33
  34   // seekoff
  35   p = in.pubseekoff(0, ios_base::beg, ios_base::in);
  36   if (pass)
  37     VERIFY( p != bad );
  38
  39   p = in.pubseekoff(0, ios_base::beg, ios_base::out);
  40   VERIFY( p == bad );
  41
  42   p = in.pubseekoff(0, ios_base::beg);
  43   VERIFY( p == bad );
  44 }
  45
  46 int main()
  47 {
  48   using namespace std;
  49
  50   // movie star, submarine scientist!
  51   stringbuf in1("Hedy Lamarr", ios_base::in);
  52   stringbuf in2(ios_base::in);
  53   stringbuf in3("", ios_base::in);
  54   test02(in1, true);
  55   test02(in2, false);
  56   test02(in3, false);
  57   return 0;
  58 }