libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/char/3-in.cc

   1 // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001-2019 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 // { dg-require-fileio "" }
  23
  24 #include <fstream>
  25 #include <testsuite_hooks.h>
  26
  27 void test02(std::filebuf& in, bool pass)
  28 {
  29   using namespace std;
  30   typedef streambuf::pos_type pos_type;
  31   typedef streambuf::off_type off_type;
  32   pos_type bad = pos_type(off_type(-1));
  33   pos_type p = 0;
  34
  35   // seekoff
  36   p = in.pubseekoff(0, ios_base::beg, ios_base::in);
  37   VERIFY( pass == (p != bad) );
  38
  39   p = in.pubseekoff(0, ios_base::beg, ios_base::out);
  40   VERIFY( pass == (p != bad) );  // See libstdc++/12232
  41
  42   p = in.pubseekoff(0, ios_base::beg);
  43   VERIFY( pass == (p != bad) );
  44 }
  45
  46 const char name_01[] = "filebuf_virtuals-1.tst"; // file with data in it
  47 const char name_03[] = "filebuf_members-1.tst"; // empty file
  48
  49 int main()
  50 {
  51   using namespace std;
  52
  53   filebuf in1;
  54   in1.open(name_01, ios_base::in);
  55   filebuf in2;
  56   filebuf in3;
  57   in3.open(name_03, ios_base::in);
  58   test02(in1, true);
  59   test02(in2, false);
  60   test02(in3, true);
  61   return 0;
  62 }