old-autovect-branch/libstdc++-v3/testsuite/22_locale/codecvt/unshift/wchar_t/1.cc

   1 // 2000-08-17 Benjamin Kosnik <bkoz@cygnus.com>
   2
   3 // Copyright (C) 2000, 2002, 2003 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 <testsuite_hooks.h>
  25
  26 // Need to explicitly set the state(mbstate_t) to zero.
  27 // How to do this is not specified by the ISO C99 standard, so we
  28 // might need to add some operators to make the intuiative case
  29 // work:
  30 //   w_codecvt::state_type state00;
  31 //   state00 = 0;
  32 // or, can use this explicit "C" initialization:
  33 //   w_codecvt::state_type state01 = {0, 0};
  34 // .. except Ulrich says: Use memset. Always use memset. Feel the force...
  35 void
  36 zero_state(std::mbstate_t& state)
  37 { std::memset(&state, 0, sizeof(std::mbstate_t)); }
  38
  39 // Required instantiation
  40 // codecvt<wchar_t, char, mbstate_t>
  41 void test01()
  42 {
  43   using namespace std;
  44   typedef codecvt<wchar_t, char, mbstate_t>     w_codecvt;
  45   typedef codecvt_base::result                  result;
  46   typedef wchar_t                               int_type;
  47   typedef char                                  ext_type;
  48
  49   bool test __attribute__((unused)) = true;
  50   const ext_type*       e_lit = "black pearl jasmine tea";
  51   int                   size = strlen(e_lit);
  52   ext_type*             e_arr = new ext_type[size + 1];
  53   ext_type*             eto_next;
  54
  55   locale                loc;
  56   const w_codecvt*      cvt = &use_facet<w_codecvt>(loc);
  57
  58   // unshift
  59   strcpy(e_arr, e_lit);
  60   w_codecvt::state_type state03;
  61   zero_state(state03);
  62   result r3 = cvt->unshift(state03, e_arr, e_arr + size, eto_next);
  63   VERIFY( r3 == codecvt_base::noconv );
  64   VERIFY( !strcmp(e_arr, e_lit) );
  65   VERIFY( eto_next == e_arr );
  66
  67   delete [] e_arr;
  68 }
  69
  70 int main ()
  71 {
  72   test01();
  73   return 0;
  74 }