libstdc++-v3/testsuite/ext/codecvt/char-1.cc

   1 // { dg-require-iconv "UCS-2BE" }
   2 // { dg-require-iconv "ISO-8859-15" }
   3
   4 // 2000-08-22 Benjamin Kosnik <bkoz@cygnus.com>
   5
   6 // Copyright (C) 2000-2013 Free Software Foundation, Inc.
   7 //
   8 // This file is part of the GNU ISO C++ Library.  This library is free
   9 // software; you can redistribute it and/or modify it under the
  10 // terms of the GNU General Public License as published by the
  11 // Free Software Foundation; either version 3, or (at your option)
  12 // any later version.
  13
  14 // This library is distributed in the hope that it will be useful,
  15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 // GNU General Public License for more details.
  18
  19 // You should have received a copy of the GNU General Public License along
  20 // with this library; see the file COPYING3.  If not see
  21 // <http://www.gnu.org/licenses/>.
  22
  23 // 22.2.1.5 - Template class codecvt [lib.locale.codecvt]
  24 #include <locale>
  25 #include <cstring>
  26 #include <testsuite_hooks.h>
  27 #include <ext/codecvt_specializations.h>
  28
  29 /*
  30 > how do I check that these conversions are correct?
  31 Very easy.  Since all the characters are from ASCII you simply
  32 zero-extend the values.
  33
  34 drepper$ echo 'black pearl jasmine tea' | od -t x1
  35 0000000 62 6c 61 63 6b 20 70 65 61 72 6c 20 6a 61 73 6d
  36 0000020 69 6e 65 20 74 65 61 0a
  37
  38 So the UCS-2 string is
  39
  40 0x0062, 0x006c, 0x0061, ...
  41
  42 You get the idea.  With iconv() you have to take care of the
  43 byte-order, though.  UCS-2 can mean little- or big endian.  Looking at
  44 your result
  45
  46 > $9 = 25856
  47
  48 it shows that the other byte-order is used (25856 == 0x6500).
  49 */
  50
  51 // Partial specialization using encoding_state.
  52 // codecvt<unicode_t, char, encoding_state>
  53 // UNICODE - UCS2 (big endian)
  54 void test01()
  55 {
  56   using namespace std;
  57   typedef codecvt_base::result                  result;
  58   typedef unsigned short                        int_type;
  59   typedef char                                  ext_type;
  60   typedef __gnu_cxx::encoding_state                     state_type;
  61   typedef codecvt<int_type, ext_type, state_type>       unicode_codecvt;
  62   typedef char_traits<int_type>                 int_traits;
  63   typedef char_traits<ext_type>                 ext_traits;
  64
  65   bool test __attribute__((unused)) = true;
  66   const ext_type*       e_lit = "black pearl jasmine tea";
  67   int                   size = strlen(e_lit);
  68
  69   char  i_lit_base[50] __attribute__((aligned(__alignof__(int_type)))) =
  70   {
  71     char(0x00), char(0x62), char(0x00), char(0x6c), char(0x00), char(0x61),
  72     char(0x00), char(0x63), char(0x00), char(0x6b), char(0x00), char(0x20),
  73     char(0x00), char(0x70), char(0x00), char(0x65), char(0x00), char(0x61),
  74     char(0x00), char(0x72), char(0x00), char(0x6c), char(0x00), char(0x20),
  75     char(0x00), char(0x6a), char(0x00), char(0x61), char(0x00), char(0x73),
  76     char(0x00), char(0x6d), char(0x00), char(0x69), char(0x00), char(0x6e),
  77     char(0x00), char(0x65), char(0x00), char(0x20), char(0x00), char(0x74),
  78     char(0x00), char(0x65), char(0x00), char(0x61), char(0x00), char(0xa0)
  79   };
  80   const int_type*       i_lit = reinterpret_cast<int_type*>(i_lit_base);
  81
  82   const ext_type*       efrom_next;
  83   const int_type*       ifrom_next;
  84   ext_type*             e_arr = new ext_type[size + 1];
  85   ext_type*             eto_next;
  86   int_type*             i_arr = new int_type[size + 1];
  87   int_type*             ito_next;
  88
  89   // construct a locale object with the specialized facet.
  90   locale                loc(locale::classic(), new unicode_codecvt);
  91   // sanity check the constructed locale has the specialized facet.
  92   VERIFY( has_facet<unicode_codecvt>(loc) );
  93   const unicode_codecvt& cvt = use_facet<unicode_codecvt>(loc);
  94
  95   // in
  96   //  unicode_codecvt::state_type state01("UCS-2BE", "ISO-8859-15", 0xfeff, 0);
  97   unicode_codecvt::state_type state01("UCS-2BE", "ISO-8859-15", 0, 0);
  98
  99   // internal encoding is bigger because of bom
 100   result r1 = cvt.in(state01, e_lit, e_lit + size, efrom_next,
 101                      i_arr, i_arr + size + 1, ito_next);
 102   VERIFY( r1 == codecvt_base::ok );
 103   VERIFY( !int_traits::compare(i_arr, i_lit, size) );
 104   VERIFY( efrom_next == e_lit + size );
 105   VERIFY( ito_next == i_arr + size );
 106
 107   // out
 108   unicode_codecvt::state_type state02("UCS-2BE", "ISO-8859-15", 0, 0);
 109   result r2 = cvt.out(state02, i_lit, i_lit + size, ifrom_next,
 110                        e_arr, e_arr + size, eto_next);
 111   VERIFY( r2 == codecvt_base::ok );
 112   VERIFY( !ext_traits::compare(e_arr, e_lit, size) );
 113   VERIFY( ifrom_next == i_lit + size );
 114   VERIFY( eto_next == e_arr + size );
 115
 116   // unshift
 117   ext_traits::copy(e_arr, e_lit, size);
 118   unicode_codecvt::state_type state03("UCS-2BE", "ISO-8859-15", 0, 0);
 119   result r3 = cvt.unshift(state03, e_arr, e_arr + size, eto_next);
 120   VERIFY( r3 == codecvt_base::noconv );
 121   VERIFY( !ext_traits::compare(e_arr, e_lit, size) );
 122   VERIFY( eto_next == e_arr );
 123
 124   int i = cvt.encoding();
 125   VERIFY( i == 2 ); // Target-dependent.
 126
 127   VERIFY( !cvt.always_noconv() );
 128
 129   unicode_codecvt::state_type state04("UCS-2BE", "ISO-8859-15", 0, 0);
 130   int j = cvt.length(state03, e_lit, e_lit + size, 5);
 131   VERIFY( j == 5 );
 132
 133   int k = cvt.max_length();
 134   VERIFY( k == 1 );
 135
 136   delete [] e_arr;
 137   delete [] i_arr;
 138 }
 139
 140 int main ()
 141 {
 142   test01();
 143   return 0;
 144 }