libstdc++-v3/testsuite/22_locale/codecvt/in/wchar_t/5.cc

   1 // 2003-02-06  Petur Runolfsson  <peturr02@ru.is>
   2
   3 // Copyright (C) 2003, 2004, 2005, 2006, 2007 Free Software Foundation
   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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // 22.2.1.5 - Template class codecvt [lib.locale.codecvt]
  22
  23 #include <locale>
  24 #include <cstring>
  25 #include <testsuite_hooks.h>
  26
  27 // Need to explicitly set the state(mbstate_t) to zero.
  28 // How to do this is not specified by the ISO C99 standard, so we
  29 // might need to add some operators to make the intuiative case
  30 // work:
  31 //   w_codecvt::state_type state00;
  32 //   state00 = 0;
  33 // or, can use this explicit "C" initialization:
  34 //   w_codecvt::state_type state01 = {0, 0};
  35 // .. except Ulrich says: Use memset. Always use memset. Feel the force...
  36 void
  37 zero_state(std::mbstate_t& state)
  38 { std::memset(&state, 0, sizeof(std::mbstate_t)); }
  39
  40 // Required instantiation
  41 // codecvt<wchar_t, char, mbstate_t>
  42 //
  43 // Test handling of '\0' characters in input
  44 // libstdc++/9246
  45 void test05()
  46 {
  47   using namespace std;
  48   typedef codecvt<wchar_t, char, mbstate_t>     w_codecvt;
  49   typedef codecvt_base::result                  result;
  50   typedef wchar_t                               int_type;
  51   typedef char                                  ext_type;
  52   typedef char_traits<wchar_t>                  int_traits;
  53
  54   bool test __attribute__((unused)) = true;
  55   const ext_type        e_lit[] = { '\0', '\0', 'f', '\0' };
  56   const ext_type*       efrom_next;
  57   const int_type        i_lit[] = { L'\0', L'\0', L'f', L'\0' };
  58   size_t                size = sizeof(e_lit);
  59   int_type*             i_arr = new int_type[size + 1];
  60   int_type*             i_ref = new int_type[size + 1];
  61   wmemset(i_arr, static_cast<wchar_t>(0xdeadbeef), size + 1);
  62   wmemset(i_ref, static_cast<wchar_t>(0xdeadbeef), size + 1);
  63   int_type*             ito_next;
  64
  65   locale                loc;
  66   const w_codecvt*      cvt = &use_facet<w_codecvt>(loc);
  67
  68   // in
  69   w_codecvt::state_type state01;
  70   zero_state(state01);
  71   result r1 = cvt->in(state01, e_lit, e_lit + size, efrom_next,
  72                       i_arr, i_arr + size, ito_next);
  73   VERIFY( r1 == codecvt_base::ok );
  74   VERIFY( efrom_next == e_lit + size );
  75   VERIFY( ito_next == i_arr + size );
  76   VERIFY( !int_traits::compare(i_arr, i_lit, size) );
  77   VERIFY( !int_traits::compare(ito_next, i_ref, 1) );
  78
  79   delete [] i_arr;
  80   delete [] i_ref;
  81 }
  82
  83 int main ()
  84 {
  85   test05();
  86   return 0;
  87 }