libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/wchar_t/2.cc

   1 // { dg-require-namedlocale "se_NO.UTF-8" }
   2
   3 // 2003-09-08  Petur Runolfsson  <peturr02@ru.is>
   4
   5 // Copyright (C) 2003-2013 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 // 27.8.1.4 Overridden virtual functions
  23
  24 #include <fstream>
  25 #include <locale>
  26 #include <cstdio>
  27 #include <testsuite_hooks.h>
  28
  29 // Check that basic_filebuf::seekoff handles UTF-8 when open for input and
  30 // output.
  31 void test02()
  32 {
  33   using namespace std;
  34   typedef wfilebuf::int_type int_type;
  35   bool test __attribute__((unused)) = true;
  36   const char name[] = "tmp_seekoff-2.tst";
  37
  38   locale loc = locale("se_NO.UTF-8");
  39
  40   const size_t size = 10;
  41   wchar_t buf[size];
  42   streamsize n;
  43
  44   wfilebuf fb;
  45   fb.pubimbue(loc);
  46   fb.open(name, ios_base::in | ios_base::out | ios_base::trunc);
  47
  48   n = fb.sputn(L"\xa0st", 3);
  49   VERIFY( n == 3 );
  50
  51   fb.pubseekoff(0, ios_base::beg);
  52   n = fb.sgetn(buf, 2);
  53   VERIFY( n == 2 );
  54   VERIFY( !wmemcmp(buf, L"\xa0s", 2) );
  55
  56   fb.pubseekoff(0, ios_base::cur);
  57   n = fb.sputn(L"\xb2R", 2);
  58   VERIFY( n == 2 );
  59
  60   fb.pubseekoff(0, ios_base::beg);
  61   n = fb.sgetn(buf, size);
  62   VERIFY( n == 4 );
  63   VERIFY( !wmemcmp(buf, L"\xa0s\xb2R", 4) );
  64
  65   fb.pubseekoff(0, ios_base::beg);
  66   n = fb.sputn(L"\x90m\x92n\x94", 5);
  67   VERIFY( n == 5 );
  68
  69   fb.pubseekoff(0, ios_base::beg);
  70   n = fb.sgetn(buf, 2);
  71   VERIFY( n == 2 );
  72   VERIFY( !wmemcmp(buf, L"\x90m", 2) );
  73
  74   fb.pubseekoff(0, ios_base::end);
  75   n = fb.sputn(L"I\xbfJ", 3);
  76   VERIFY( n == 3 );
  77
  78   fb.pubseekoff(0, ios_base::beg);
  79   n = fb.sgetn(buf, size);
  80   VERIFY( n == 8 );
  81   VERIFY( !wmemcmp(buf, L"\x90m\x92n\x94I\xbfJ", 8) );
  82
  83   fb.close();
  84 }
  85
  86 int main()
  87 {
  88   test02();
  89   return 0;
  90 }