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extern/stdcxx/4.2.1/tests/regress/22.locale.codecvt.stdcxx-435.cpp

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+/************************************************************************
+ *
+ * 22.locale.codecvt.stdcxx-435.cpp - regression test for STDCXX-435
+ *
+ *   http://issues.apache.org/jira/browse/STDCXX-435
+ *
+ * $Id: 22.locale.codecvt.stdcxx-435.cpp 648752 2008-04-16 17:01:56Z faridz $
+ *
+ ***************************************************************************
+ *
+ * Licensed to the Apache Software  Foundation (ASF) under one or more
+ * contributor  license agreements.  See  the NOTICE  file distributed
+ * with  this  work  for  additional information  regarding  copyright
+ * ownership.   The ASF  licenses this  file to  you under  the Apache
+ * License, Version  2.0 (the  "License"); you may  not use  this file
+ * except in  compliance with the License.   You may obtain  a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the  License is distributed on an  "AS IS" BASIS,
+ * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY  KIND, either  express or
+ * implied.   See  the License  for  the  specific language  governing
+ * permissions and limitations under the License.
+ *
+ **************************************************************************/
+
+#include <cassert>
+#include <clocale>
+#include <cwchar>
+#include <locale>
+
+int main ()
+{
+    // multibyte locale
+    std::locale mbloc;
+
+    // names of some well-known multibyte locales
+    const char* const names[] = {
+        "EN_US.UTF-8",   // AIX
+        "en_US.UTF-8",   // AIX, Linux, Solaris
+        "en_US.utf8",    // HP-UX
+
+        // starting with Vista, Windows follows RFC 4646 name format
+        // http://msdn2.microsoft.com/en-us/library/ms776260(VS.85).aspx
+        "hy-AM",  // Win 2000
+        "as-IN",  // Win Vista
+        "bn-IN",  // Win XP SP2
+        "zh-HK",
+        "zh-CN",
+
+        0
+    };
+
+    // try to find the first multibyte locale on this system
+    for (unsigned i = 0; names [i]; ++i) {
+        if (std::setlocale (LC_ALL, names [i])) {
+            mbloc = std::locale (names [i]);
+            break;
+        }
+    }
+
+    // fall back on the "C" locale...
+
+    typedef std::codecvt<wchar_t, char, std::mbstate_t> MbCvt;
+
+    const MbCvt &cvt = std::use_facet<MbCvt>(mbloc);
+
+    // source and destination buffers
+    const char src[] = "abc";
+    wchar_t dst [2] = { L'\0', L'\1' };
+
+    const char* from_next;
+
+    wchar_t* to_next;
+
+    std::mbstate_t state = std::mbstate_t ();
+
+    // convert exactly one source character, expect exactly
+    // one wide character in the destination buffer
+    const std::codecvt_base::result res =
+        cvt.in (state,
+                src, src + 1, from_next,
+                dst, dst + 2, to_next);
+
+    assert (cvt.ok == res);
+    assert (1 == from_next - src);
+    assert (1 == to_next - dst);
+    assert ('a' == dst [0] && '\1' == dst [1]);
+}