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

   1 // 2000-08-17 Benjamin Kosnik <bkoz@cygnus.com>
   2
   3 // Copyright (C) 2000-2019 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   int                   size = 25;
  35   char*                 c_arr = new char[size];
  36   char*                 c_ref = new char[size];
  37   locale                loc = locale::classic();
  38   const c_codecvt*      cvt = &use_facet<c_codecvt>(loc);
  39
  40   // According to the resolution of DR19 (see also libstd++/9168), in
  41   // case of degenerate conversion ('noconv'), "there are no changes to
  42   // the values in [to, to_limit)."
  43   memset(c_ref, 'X', size);
  44
  45   int k = cvt->max_length();
  46   VERIFY( k == 1 );
  47
  48   delete [] c_arr;
  49   delete [] c_ref;
  50 }
  51
  52 int main ()
  53 {
  54   test01();
  55   return 0;
  56 }