libstdc++-v3/testsuite/22_locale/codecvt/char16_t-char8_t.cc

   1 // Copyright (C) 2015-2025 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-do run { target c++11 } }
  19 // { dg-require-cstdint "" }
  20 // { dg-options "-fchar8_t" }
  21
  22 // [locale.codecvt], C++11 22.4.1.4.  specialization.
  23
  24 #include <locale>
  25 #include <cstring>
  26 #include <testsuite_hooks.h>
  27
  28 void
  29 test01()
  30 {
  31   using namespace std;
  32   typedef codecvt<char16_t, char8_t, mbstate_t> codecvt_c16;
  33   locale loc_c = locale::classic();
  34   VERIFY(has_facet<codecvt_c16>(loc_c));
  35   const codecvt_c16* const cvt = &use_facet<codecvt_c16>(loc_c);
  36
  37   VERIFY(!cvt->always_noconv());
  38   VERIFY(cvt->max_length() == 4);
  39   VERIFY(cvt->encoding() == 0);
  40
  41   const char8_t u8dat[] = u8"H\U000000E4ll\U000000F6 \U0001F63F \U000056FD "
  42     u8"\U0000222B f(\U000003BA) exp(-2\U000003C0\U000003C9) d\U000003BA "
  43     u8"\U0001F6BF \U0001F6BF \U0001F648 \U00000413\U00000435\U0000043E"
  44     u8"\U00000433\U00000440\U00000430\U00000444\U00000438\U0000044F \U0000FB05";
  45   const char8_t* const u8dat_end = std::end(u8dat);
  46
  47   const char16_t u16dat[] = u"H\U000000E4ll\U000000F6 \U0001F63F \U000056FD "
  48     u"\U0000222B f(\U000003BA) exp(-2\U000003C0\U000003C9) d\U000003BA "
  49     u"\U0001F6BF \U0001F6BF \U0001F648 \U00000413\U00000435\U0000043E"
  50     u"\U00000433\U00000440\U00000430\U00000444\U00000438\U0000044F \U0000FB05";
  51   const char16_t* const u16dat_end = std::end(u16dat);
  52
  53   {
  54     const size_t len = u16dat_end - u16dat + 1;
  55     char16_t* const buffer = new char16_t[len];
  56     char16_t* const buffer_end = buffer + len;
  57
  58     const char8_t* from_next;
  59     char16_t* to_next;
  60
  61     codecvt_c16::state_type state01;
  62     state01 = {};
  63     codecvt_base::result res = cvt->in(state01, u8dat, u8dat_end, from_next,
  64                                        buffer, buffer_end, to_next);
  65
  66     VERIFY(res == codecvt_base::ok);
  67     VERIFY(from_next == u8dat_end);
  68     VERIFY(std::memcmp((void*)buffer, (void*)u16dat, sizeof(u16dat)) == 0);
  69
  70     delete[] buffer;
  71   }
  72
  73   {
  74     const size_t len = u8dat_end - u8dat + 1;
  75     char8_t* const buffer = new char8_t[len];
  76     char8_t* const buffer_end = buffer + len;
  77
  78     const char16_t* from_next;
  79     char8_t* to_next;
  80
  81     codecvt_c16::state_type state01;
  82     state01 = {};
  83     codecvt_base::result res = cvt->out(state01, u16dat, u16dat_end, from_next,
  84                                         buffer, buffer_end, to_next);
  85
  86     VERIFY(res == codecvt_base::ok);
  87     VERIFY(from_next == u16dat_end);
  88     VERIFY(std::memcmp((void*)buffer, (void*)u8dat, sizeof(u8dat)) == 0);
  89
  90     delete[] buffer;
  91   }
  92 }
  93
  94 int
  95 main()
  96 {
  97   test01();
  98 }