libstdc++-v3/testsuite/27_io/basic_filebuf/sbumpc/char/1-io.cc

   1 // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001, 2002, 2003 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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // 27.8.1.4 Overridden virtual functions
  22
  23 #include <fstream>
  24 #include <testsuite_hooks.h>
  25 #include <testsuite_io.h>
  26
  27 // @require@ %-*.tst %-*.txt
  28 // @diff@ %-*.tst %*.txt
  29
  30 const char name_01[] = "sgetc.txt"; // file with data in it
  31 const char name_03[] = "tmp_sbumpc_1io.tst"; // empty file, need to create
  32
  33 void test05()
  34 {
  35   using namespace std;
  36   using namespace __gnu_test;
  37   typedef filebuf::int_type     int_type;
  38   typedef filebuf::traits_type  traits_type;
  39
  40   bool test __attribute__((unused)) = true;
  41
  42   // int_type sbumpc()
  43   // if read_cur not avail returns uflow(), else return *read_cur & increment
  44
  45   // in | out 1
  46   {
  47     constraint_filebuf fb_03;
  48     fb_03.open(name_03, ios_base::out | ios_base::in | ios_base::trunc);
  49     VERIFY( !fb_03.write_position() );
  50     VERIFY( !fb_03.read_position() );
  51     int_type c5 = fb_03.sbumpc();
  52     VERIFY( c5 == traits_type::eof() );
  53     VERIFY( !fb_03.write_position() );
  54     VERIFY( !fb_03.read_position() );
  55   }
  56
  57   // in | out 2
  58   {
  59     constraint_filebuf fb_01;
  60     fb_01.open(name_01, ios_base::in | ios_base::out);
  61     VERIFY( !fb_01.write_position() );
  62
  63     int_type c1 = fb_01.sbumpc();
  64     VERIFY( c1 == '/' );
  65     int_type c3 = fb_01.sbumpc();
  66     VERIFY( c3 == '/' );
  67
  68     c1 = fb_01.sgetc();
  69     int_type c2 = fb_01.sbumpc();
  70     c3 = fb_01.sgetc();
  71     VERIFY( c1 == ' ' );
  72     VERIFY( c3 == '9' );
  73     VERIFY( c1 == c2 );
  74     VERIFY( c2 != c3 );
  75
  76     c1 = fb_01.sbumpc();
  77     c2 = fb_01.sbumpc();
  78     c3 = fb_01.sgetc();
  79     VERIFY( c1 == '9' );
  80     VERIFY( c2 == '9' );
  81     VERIFY( c3 == '0' );
  82
  83     VERIFY( !fb_01.write_position() );
  84     VERIFY( fb_01.read_position() );
  85   }
  86 }
  87
  88 int main()
  89 {
  90   test05();
  91   return 0;
  92 }