libstdc++-v3/testsuite/27_io/basic_filebuf/snextc/char/2-io.cc

   1 // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001-2022 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 // 27.8.1.4 Overridden virtual functions
  21
  22 // { dg-require-fileio "" }
  23
  24 #include <fstream>
  25 #include <testsuite_hooks.h>
  26 #include <testsuite_io.h>
  27
  28 // @require@ %-*.tst %-*.txt
  29 // @diff@ %-*.tst %*.txt
  30
  31 const char name_01[] = "sgetc.txt"; // file with data in it
  32 const char name_03[] = "tmp_snextc_2io.tst"; // empty file, need to create
  33
  34 void test05()
  35 {
  36   using namespace std;
  37   using namespace __gnu_test;
  38   typedef filebuf::int_type     int_type;
  39   typedef filebuf::traits_type  traits_type;
  40
  41   int_type                      c1, c3;
  42
  43   // int_type snextc()
  44   // calls sbumpc and if sbumpc != eof, return sgetc
  45
  46   // in | out 1
  47   {
  48     constraint_filebuf fb_03;
  49     fb_03.pubsetbuf(0, 0);
  50     fb_03.open(name_03, ios_base::out | ios_base::in | ios_base::trunc);
  51     VERIFY( fb_03.unbuffered() );
  52     c3 = fb_03.snextc();
  53     VERIFY( c3 == traits_type::eof() );
  54     VERIFY( fb_03.unbuffered() );
  55   }
  56
  57   // in | out 2
  58   {
  59     constraint_filebuf fb_01;
  60     fb_01.pubsetbuf(0, 0);
  61     fb_01.open(name_01, ios_base::in | ios_base::out);
  62     VERIFY( fb_01.unbuffered() );
  63     int_type c4 = fb_01.sbumpc();
  64     VERIFY( c4 == '/' );
  65     c4 = fb_01.sbumpc();
  66     VERIFY( c4 == '/' );
  67     c4 = fb_01.sgetc();
  68     VERIFY( c4 == ' ' );
  69     c1 = fb_01.snextc();
  70     VERIFY( c1 == '9' );
  71     c4 = fb_01.sgetc();
  72     VERIFY( c4 == '9' );
  73     VERIFY( fb_01.unbuffered() );
  74   }
  75 }
  76
  77 int main()
  78 {
  79   test05();
  80   return 0;
  81 }