transcoder.h

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/*
 * 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.
 */

#ifndef _LOG4CXX_HELPERS_TRANSCODER_H
#define _LOG4CXX_HELPERS_TRANSCODER_H

#if defined(_MSC_VER)
    #pragma warning ( push )
    #pragma warning ( disable: 4231 4251 4275 4786 )
#endif

#include <log4cxx/logstring.h>


namespace log4cxx
{
namespace helpers
{
class ByteBuffer;
class Pool;
class LOG4CXX_EXPORT Transcoder
{
    public:


        static void decodeUTF8(const std::string& src, LogString& dst);
        static void encodeUTF8(const LogString& src, std::string& dst);
        static char* encodeUTF8(const LogString& src, log4cxx::helpers::Pool& p);
        static void encodeUTF8(unsigned int sv, ByteBuffer& dst);
        static void encodeUTF16LE(unsigned int sv, ByteBuffer& dst);
        static void encodeUTF16BE(unsigned int sv, ByteBuffer& dst);


        static unsigned int decode(const std::string& in,
            std::string::const_iterator& iter);

        static void encode(unsigned int ch, std::string& dst);

        static void decode(const std::string& src, LogString& dst);
        static void encode(const LogString& src, std::string& dst);

        static char* encode(const LogString& src, log4cxx::helpers::Pool& p);



#if LOG4CXX_WCHAR_T_API || LOG4CXX_LOGCHAR_IS_WCHAR_T || defined(WIN32) || defined(_WIN32)
        static void decode(const std::wstring& src, LogString& dst);
        static void encode(const LogString& src, std::wstring& dst);
        static wchar_t* wencode(const LogString& src, log4cxx::helpers::Pool& p);

        static unsigned int decode(const std::wstring& in,
            std::wstring::const_iterator& iter);

        static void encode(unsigned int ch, std::wstring& dst);

#endif


#if LOG4CXX_UNICHAR_API || LOG4CXX_CFSTRING_API || LOG4CXX_LOGCHAR_IS_UNICHAR
        static void decode(const std::basic_string<UniChar>& src, LogString& dst);
        static void encode(const LogString& src, std::basic_string<UniChar>& dst);

        static unsigned int decode(const std::basic_string<UniChar>& in,
            std::basic_string<UniChar>::const_iterator& iter);

        static void encode(unsigned int ch, std::basic_string<UniChar>& dst);

#endif

#if LOG4CXX_CFSTRING_API
        static void decode(const CFStringRef& src, LogString& dst);
        static CFStringRef encode(const LogString& src);
#endif

        enum { LOSSCHAR = 0x3F };

        static logchar decode(char v);
        static LogString decode(const char* v);

        static std::string encodeCharsetName(const LogString& charsetName);

    private:

    private:
        Transcoder();
        Transcoder(const Transcoder&);
        Transcoder& operator=(const Transcoder&);
        enum { BUFSIZE = 256 };
        static size_t encodeUTF8(unsigned int ch, char* dst);
        static size_t encodeUTF16BE(unsigned int ch, char* dst);
        static size_t encodeUTF16LE(unsigned int ch, char* dst);

};
}
}

#define LOG4CXX_ENCODE_CHAR(var, src) \
    std::string var;                      \
    log4cxx::helpers::Transcoder::encode(src, var)

#define LOG4CXX_DECODE_CHAR(var, src) \
    log4cxx::LogString var;                      \
    log4cxx::helpers::Transcoder::decode(src, var)

#define LOG4CXX_DECODE_CFSTRING(var, src) \
    log4cxx::LogString var;                      \
    log4cxx::helpers::Transcoder::decode(src, var)

#define LOG4CXX_ENCODE_CFSTRING(var, src) \
    CFStringRef var = log4cxx::helpers::Transcoder::encode(src)


#if LOG4CXX_LOGCHAR_IS_WCHAR

#define LOG4CXX_ENCODE_WCHAR(var, src) \
    const std::wstring& var = src

#define LOG4CXX_DECODE_WCHAR(var, src) \
    const log4cxx::LogString& var = src

#else

#define LOG4CXX_ENCODE_WCHAR(var, src) \
    std::wstring var;                      \
    log4cxx::helpers::Transcoder::encode(src, var)

#define LOG4CXX_DECODE_WCHAR(var, src) \
    log4cxx::LogString var;                      \
    log4cxx::helpers::Transcoder::decode(src, var)

#endif

#if LOG4CXX_LOGCHAR_IS_UNICHAR

#define LOG4CXX_ENCODE_UNICHAR(var, src) \
    const std::basic_string<UniChar>& var = src

#define LOG4CXX_DECODE_UNICHAR(var, src) \
    const log4cxx::LogString& var = src

#else

#define LOG4CXX_ENCODE_UNICHAR(var, src) \
    std::basic_string<UniChar> var;          \
    log4cxx::helpers::Transcoder::encode(src, var)

#define LOG4CXX_DECODE_UNICHAR(var, src) \
    log4cxx::LogString var;                      \
    log4cxx::helpers::Transcoder::decode(src, var)

#endif

#if defined(_MSC_VER)
    #pragma warning (pop)
#endif

#endif //_LOG4CXX_HELPERS_TRANSCODER_H