Update Nemirtingas overlay to latest.

overlay_experimental/System/Encoding.cpp

@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) Nemirtingas
+ * This file is part of System.
+ *
+ * System is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * System 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with System; if not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#include "System_internals.h"
+
+#include "Encoding.hpp"
+#include "utfcpp/utf8.h"
+
+#include <string.h>
+#include <algorithm>
+
+namespace System {
+namespace Encoding {
+
+namespace details {
+    template<typename T, size_t s = sizeof(typename T::value_type)>
+    struct string_deducer
+    {
+        static std::string  convert_string(T const& str) = delete;
+        static std::wstring convert_wstring(T const& str) = delete;
+    };
+
+    template<typename T>
+    struct string_deducer<T, 1>
+    {
+        static std::string convert_string(T const& str)
+        {
+            return std::string(std::begin(str), std::end(str));
+        }
+
+        static std::wstring convert_wstring(std::string const& str)
+        {
+            std::wstring r(std::begin(str), std::end(str));
+            return r;
+        }
+    };
+
+    template<typename T>
+    struct string_deducer<T, 2>
+    {
+        static std::string convert_string(T const& str)
+        {
+            std::string r;
+            utf8::utf16to8(std::begin(str), std::end(str), std::back_inserter(r));
+            return r;
+        }
+
+        static std::wstring convert_wstring(std::string const& str)
+        {
+            std::wstring r;
+            utf8::utf8to16(std::begin(str), std::end(str), std::back_inserter(r));
+            return r;
+        }
+    };
+
+    template<typename T>
+    struct string_deducer<T, 4>
+    {
+        static std::string convert_string(T const& str)
+        {
+            std::string r;
+            utf8::utf32to8(std::begin(str), std::end(str), std::back_inserter(r));
+            return r;
+        }
+
+        static std::wstring convert_wstring(std::string const& str)
+        {
+            std::wstring r;
+            utf8::utf8to32(std::begin(str), std::end(str), std::back_inserter(r));
+            return r;
+        }
+    };
+}
+
+std::wstring Utf8ToWChar(std::string const& str)
+{
+    return details::string_deducer<std::wstring>::convert_wstring(str);
+}
+
+std::u16string Utf8ToUtf16(std::string const& str)
+{
+    return utf8::utf8to16(str);
+}
+
+std::u32string Utf8ToUtf32(std::string const& str)
+{
+    return utf8::utf8to32(str);
+}
+
+std::string WCharToUtf8(std::wstring const& str)
+{
+    return details::string_deducer<std::wstring>::convert_string(str);
+}
+
+std::string Utf16ToUtf8(std::u16string const& str)
+{
+    return utf8::utf16to8(str);
+}
+
+std::string Utf32ToUtf8(std::u32string const& str)
+{
+    return utf8::utf32to8(str);
+}
+
+size_t EncodedLength(std::string const& str)
+{
+    return utf8::distance(str.begin(), str.end());
+}
+
+}// namespace Encoding
+}// namespace System