charsetencoder.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_CHARSETENCODER_H
#define _LOG4CXX_HELPERS_CHARSETENCODER_H
 
#include <log4cxx/helpers/object.h>
#include <log4cxx/helpers/pool.h>
 
namespace LOG4CXX_NS
{
 
namespace helpers
{
class ByteBuffer;
class CharsetEncoder;
LOG4CXX_PTR_DEF(CharsetEncoder);

class LOG4CXX_EXPORT CharsetEncoder : public Object
{
    public:
        DECLARE_ABSTRACT_LOG4CXX_OBJECT(CharsetEncoder)
        BEGIN_LOG4CXX_CAST_MAP()
        LOG4CXX_CAST_ENTRY(CharsetEncoder)
        END_LOG4CXX_CAST_MAP()
 
    protected:
        CharsetEncoder();
 
    public:
        virtual ~CharsetEncoder();
        static CharsetEncoderPtr getDefaultEncoder();

        static CharsetEncoderPtr getEncoder(const LogString& charset);
 

        static CharsetEncoderPtr getUTF8Encoder();

        static void encode(CharsetEncoderPtr& enc,
            const LogString& src,
            LogString::const_iterator& iter,
            ByteBuffer& dst);

        virtual log4cxx_status_t encode(const LogString& in,
            LogString::const_iterator& iter,
            ByteBuffer& out) = 0;

        virtual log4cxx_status_t encode(unsigned int codePoint, ByteBuffer& out) = 0;
        virtual void reset();
 

        inline static bool isError(log4cxx_status_t stat)
        {
            return (stat != 0);
        }

        static bool isTriviallyCopyable(const LogString& src, const CharsetEncoderPtr& enc);

        static size_t putUTF8CodePoint(unsigned int ch, char* dst);

        static size_t putUTF16BECodePoint(unsigned int ch, char* dst);

        static size_t putUTF16LECodePoint(unsigned int ch, char* dst);
    private:
        CharsetEncoder(const CharsetEncoder&);
        CharsetEncoder& operator=(const CharsetEncoder&);
 
        static CharsetEncoder* createDefaultEncoder();
};
 
} // namespace helpers
 
}  //namespace log4cxx
 
#endif //_LOG4CXX_HELPERS_CHARSETENCODER_H