libstdc++-v3/testsuite/22_locale/codecvt/in/char/1.cc

   1 // 2000-08-17 Benjamin Kosnik <bkoz@cygnus.com>
   2
   3 // Copyright (C) 2000-2017 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 // 22.2.1.5 - Template class codecvt [lib.locale.codecvt]
  21
  22 #include <locale>
  23 #include <cstring>
  24 #include <testsuite_hooks.h>
  25
  26 // Required instantiation, degenerate conversion.
  27 // codecvt<char, char, mbstate_t>
  28 void test01()
  29 {
  30   using namespace std;
  31   typedef codecvt_base::result                  result;
  32   typedef codecvt<char, char, mbstate_t>        c_codecvt;
  33
  34   const char*           c_lit = "black pearl jasmine tea";
  35   const char*           from_next;
  36   int                   size = 23;
  37   char*                 c_arr = new char[size];
  38   char*                 c_ref = new char[size];
  39   char*                 to_next;
  40
  41   locale                loc = locale::classic();
  42   c_codecvt::state_type state;
  43   const c_codecvt*      cvt = &use_facet<c_codecvt>(loc);
  44
  45   // According to the resolution of DR19 (see also libstd++/9168), in
  46   // case of degenerate conversion ('noconv'), "there are no changes to
  47   // the values in [to, to_limit)."
  48   memset(c_ref, 'X', size);
  49
  50   // in
  51   memset(c_arr, 'X', size);
  52   result r1 = cvt->in(state, c_lit, c_lit + size, from_next,
  53                       c_arr, c_arr + size, to_next);
  54   VERIFY( r1 == codecvt_base::noconv );
  55   VERIFY( !memcmp(c_arr, c_ref, size) );
  56   VERIFY( from_next == c_lit );
  57   VERIFY( to_next == c_arr );
  58
  59   delete [] c_arr;
  60   delete [] c_ref;
  61 }
  62
  63 int main ()
  64 {
  65   test01();
  66   return 0;
  67 }