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

   1 // 2000-08-17 Benjamin Kosnik <bkoz@cygnus.com>
   2
   3 // Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
   4 // Free Software Foundation
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 2, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING.  If not, write to the Free
  19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  20 // USA.
  21
  22 // 22.2.1.5 - Template class codecvt [lib.locale.codecvt]
  23
  24 #include <locale>
  25 #include <cstring>
  26 #include <testsuite_hooks.h>
  27
  28 // Required instantiation, degenerate conversion.
  29 // codecvt<char, char, mbstate_t>
  30 void test01()
  31 {
  32   using namespace std;
  33   typedef codecvt_base::result                  result;
  34   typedef codecvt<char, char, mbstate_t>        c_codecvt;
  35
  36   bool test __attribute__((unused)) = true;
  37   const char*           c_lit = "black pearl jasmine tea";
  38   const char*           from_next;
  39   int                   size = 23;
  40   char*                 c_arr = new char[size];
  41   char*                 c_ref = new char[size];
  42   char*                 to_next;
  43
  44   locale                loc = locale::classic();
  45   c_codecvt::state_type state;
  46   const c_codecvt*      cvt = &use_facet<c_codecvt>(loc);
  47
  48   // According to the resolution of DR19 (see also libstd++/9168), in
  49   // case of degenerate conversion ('noconv'), "there are no changes to
  50   // the values in [to, to_limit)."
  51   memset(c_ref, 'X', size);
  52
  53   // in
  54   memset(c_arr, 'X', size);
  55   result r1 = cvt->in(state, c_lit, c_lit + size, from_next,
  56                       c_arr, c_arr + size, to_next);
  57   VERIFY( r1 == codecvt_base::noconv );
  58   VERIFY( !memcmp(c_arr, c_ref, size) );
  59   VERIFY( from_next == c_lit );
  60   VERIFY( to_next == c_arr );
  61
  62   // out
  63   memset(c_arr, 'X', size);
  64   result r2 = cvt->out(state, c_lit, c_lit + size, from_next,
  65                        c_arr, c_arr + size, to_next);
  66   VERIFY( r2 == codecvt_base::noconv );
  67   VERIFY( !memcmp(c_arr, c_ref, size) );
  68   VERIFY( from_next == c_lit );
  69   VERIFY( to_next == c_arr );
  70
  71   // unshift
  72   strcpy(c_arr, c_lit);
  73   result r3 = cvt->unshift(state, c_arr, c_arr + size, to_next);
  74   VERIFY( r3 == codecvt_base::noconv );
  75   VERIFY( !strcmp(c_arr, c_lit) );
  76   VERIFY( to_next == c_arr );
  77
  78   delete [] c_arr;
  79   delete [] c_ref;
  80 }
  81
  82 int main ()
  83 {
  84   test01();
  85   return 0;
  86 }