PR libstdc++/80041 fix codecvt_utf16<wchar_t> to use UTF-16 not UTF-8

	PR libstdc++/80041
	* src/c++11/codecvt.cc (__codecvt_utf16_base<wchar_t>::do_out)
	(__codecvt_utf16_base<wchar_t>::do_in): Convert char arguments to
	char16_t to work with UTF-16 instead of UTF-8.
	* testsuite/22_locale/codecvt/codecvt_utf16/80041.cc: New test.

From-SVN: r246202

1 files changed, 87 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/22_locale/codecvt/codecvt_utf16/80041.cc b/libstdc++-v3/testsuite/22_locale/codecvt/codecvt_utf16/80041.cc
new file mode 100644
index 0000000..a78b194
--- /dev/null
+++ b/libstdc++-v3/testsuite/22_locale/codecvt/codecvt_utf16/80041.cc
@@ -0,0 +1,87 @@
+// Copyright (C) 2017 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-do run { target c++11 } }
+
+#include <codecvt>
+#include <testsuite_hooks.h>
+
+void
+test01()
+{
+#ifdef _GLIBCXX_USE_WCHAR_T
+  std::codecvt_utf16<wchar_t> conv;
+  const wchar_t wc = 0x6557;
+  char bytes[2] = {0};
+  const wchar_t* wcnext;
+  std::mbstate_t st{};
+  char* next = nullptr;
+  auto res = conv.out(st, &wc, &wc+ 1, wcnext, bytes, std::end(bytes), next);
+  VERIFY( res == std::codecvt_base::ok );
+  VERIFY( wcnext == &wc + 1 );
+  VERIFY( next == std::end(bytes) );
+  VERIFY( bytes[0] == 0x65 );
+  VERIFY( bytes[1] == 0x57 );
+  VERIFY( conv.length(st, bytes, next, 1) == (next - bytes) );
+
+  wchar_t w;
+  wchar_t* wnext;
+  const char* cnext;
+  st = {};
+  res = conv.in(st, bytes, next, cnext, &w, &w + 1, wnext);
+  VERIFY( res == std::codecvt_base::ok );
+  VERIFY( wnext == &w + 1 );
+  VERIFY( cnext == next );
+  VERIFY( w == wc );
+#endif
+}
+
+void
+test02()
+{
+#ifdef _GLIBCXX_USE_WCHAR_T
+  std::codecvt_utf16<wchar_t, 0x10FFFF, std::little_endian> conv;
+  wchar_t wc = 0x6557;
+  char bytes[2] = {0};
+  const wchar_t* wcnext;
+  std::mbstate_t st{};
+  char* next = nullptr;
+  auto res = conv.out(st, &wc, &wc+ 1, wcnext, bytes, std::end(bytes), next);
+  VERIFY( res == std::codecvt_base::ok );
+  VERIFY( wcnext == &wc + 1 );
+  VERIFY( next == std::end(bytes) );
+  VERIFY( bytes[0] == 0x57 );
+  VERIFY( bytes[1] == 0x65 );
+  VERIFY( conv.length(st, bytes, next, 1) == (next - bytes) );
+
+  wchar_t w;
+  wchar_t* wnext;
+  const char* cnext;
+  st = {};
+  res = conv.in(st, bytes, next, cnext, &w, &w + 1, wnext);
+  VERIFY( res == std::codecvt_base::ok );
+  VERIFY( wnext == &w + 1 );
+  VERIFY( cnext == next );
+  VERIFY( w == wc );
+#endif
+}
+
+int main()
+{
+  test01();
+  test02();
+}