libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/char/12232.cc

   1 // Copyright (C) 2003-2019 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 3, 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 COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // 27.8.1.4 Overridden virtual functions
  19
  20 #include <fstream>
  21 #include <testsuite_hooks.h>
  22
  23 const char name[] = "tmp_12232";
  24
  25 // libstdc++/12232
  26 void test01()
  27 {
  28   using namespace std;
  29
  30   filebuf fbout;
  31   fbout.open(name, ios_base::out);
  32   fbout.sputn("abc", 3);
  33
  34   streampos p1 = fbout.pubseekoff(0, ios_base::cur, ios_base::in);
  35   VERIFY( p1 != streampos(-1) );
  36   fbout.sputn("de", 2);
  37
  38   streampos p2 = fbout.pubseekpos(p1, ios_base::openmode());
  39   VERIFY( p2 != streampos(-1) );
  40   fbout.sputn("34", 2);
  41
  42   streampos p3 = fbout.pubseekoff(0, ios_base::beg, ios_base::ate);
  43   VERIFY( p3 != streampos(-1) );
  44   fbout.sputn("012", 3);
  45
  46   fbout.close();
  47
  48   filebuf fbin;
  49   fbin.open(name, ios_base::in);
  50
  51   streampos p4 = fbin.pubseekoff(0, ios_base::beg, ios_base::ate);
  52   VERIFY( p4 != streampos(-1) );
  53   VERIFY( fbin.sgetc() == '0' );
  54
  55   streampos p5 = fbin.pubseekoff(-1, ios_base::end, ios_base::out);
  56   VERIFY( p5 != streampos(-1) );
  57   VERIFY( fbin.sbumpc() == '4' );
  58
  59   streampos p6 = fbin.pubseekpos(p4, ios_base::binary);
  60   VERIFY( p6 != streampos(-1) );
  61   VERIFY( fbin.sbumpc() == '0' );
  62
  63   fbin.close();
  64 }
  65
  66 int main()
  67 {
  68   void test01();
  69   return 0;
  70 }