libstdc++-v3/testsuite/22_locale/codecvt/length/char/2.cc

   1 // 2003-02-06  Petur Runolfsson  <peturr02@ru.is>
   2
   3 // Copyright (C) 2003-2024 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 <testsuite_hooks.h>
  24
  25 bool length_called = false;
  26
  27 class length_codecvt : public std::codecvt<char, char, std::mbstate_t>
  28 {
  29   typedef std::codecvt<char, char, std::mbstate_t> c_codecvt;
  30
  31 public:
  32   // DR75: type of first argument of do_length is state_type&
  33   virtual int do_length(state_type& state, const extern_type* from,
  34                         const extern_type* end, std::size_t max) const
  35   {
  36     length_called = true;
  37     return c_codecvt::do_length(state, from, end, max);
  38   }
  39 };
  40
  41 // Required instantiation, degenerate conversion.
  42 // codecvt<char, char, mbstate_t>
  43 //
  44 // libstdc++/9224
  45 void test02()
  46 {
  47   using namespace std;
  48   typedef codecvt_base::result                  result;
  49   typedef codecvt<char, char, mbstate_t>        c_codecvt;
  50
  51   const char*           c_lit = "black pearl jasmine tea";
  52   int                   size = 23;
  53
  54   locale                loc (locale::classic(), new length_codecvt);
  55   c_codecvt::state_type state;
  56   const c_codecvt*      cvt = &use_facet<c_codecvt>(loc);
  57
  58   length_called = false;
  59   cvt->length(state, c_lit, c_lit + size, 5);
  60   VERIFY( length_called );
  61 }
  62
  63 int main ()
  64 {
  65   test02();
  66   return 0;
  67 }