Added thirdparty: boost library

thirdparty/include/boost/locale/encoding_utf.hpp

@@ -0,0 +1,71 @@
+//
+// Copyright (c) 2009-2011 Artyom Beilis (Tonkikh)
+//
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#ifndef BOOST_LOCALE_ENCODING_UTF_HPP_INCLUDED
+#define BOOST_LOCALE_ENCODING_UTF_HPP_INCLUDED
+
+#include <boost/locale/encoding_errors.hpp>
+#include <boost/locale/utf.hpp>
+#include <boost/locale/util/string.hpp>
+#include <iterator>
+
+#ifdef BOOST_MSVC
+#    pragma warning(push)
+#    pragma warning(disable : 4275 4251 4231 4660)
+#endif
+
+namespace boost { namespace locale { namespace conv {
+    /// \addtogroup codepage
+    ///
+    /// @{
+
+    /// Convert a Unicode text in range [begin,end) to other Unicode encoding
+    ///
+    /// \throws conversion_error: Conversion failed (e.g. \a how is \c stop and any character cannot be decoded)
+    template<typename CharOut, typename CharIn>
+    std::basic_string<CharOut> utf_to_utf(const CharIn* begin, const CharIn* end, method_type how = default_method)
+    {
+        std::basic_string<CharOut> result;
+        result.reserve(end - begin);
+        std::back_insert_iterator<std::basic_string<CharOut>> inserter(result);
+        while(begin != end) {
+            const utf::code_point c = utf::utf_traits<CharIn>::decode(begin, end);
+            if(c == utf::illegal || c == utf::incomplete) {
+                if(how == stop)
+                    throw conversion_error();
+            } else
+                utf::utf_traits<CharOut>::encode(c, inserter);
+        }
+        return result;
+    }
+
+    /// Convert a Unicode NULL terminated string \a str other Unicode encoding
+    ///
+    /// \throws conversion_error: Conversion failed (e.g. \a how is \c stop and any character cannot be decoded)
+    template<typename CharOut, typename CharIn>
+    std::basic_string<CharOut> utf_to_utf(const CharIn* str, method_type how = default_method)
+    {
+        return utf_to_utf<CharOut, CharIn>(str, util::str_end(str), how);
+    }
+
+    /// Convert a Unicode string \a str other Unicode encoding
+    ///
+    /// \throws conversion_error: Conversion failed (e.g. \a how is \c stop and any character cannot be decoded)
+    template<typename CharOut, typename CharIn>
+    std::basic_string<CharOut> utf_to_utf(const std::basic_string<CharIn>& str, method_type how = default_method)
+    {
+        return utf_to_utf<CharOut, CharIn>(str.c_str(), str.c_str() + str.size(), how);
+    }
+
+    /// @}
+
+}}} // namespace boost::locale::conv
+
+#ifdef BOOST_MSVC
+#    pragma warning(pop)
+#endif
+
+#endif