/*

 * 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.

 */

/*

 * $Id: IconvGNUTransService.hpp 568078 2007-08-21 11:43:25Z amassari $

 */

#ifndef ICONVGNUTRANSSERVICE_HPP

#define ICONVGNUTRANSSERVICE_HPP

#include <xercesc/util/TransService.hpp>

#include <iconv.h>

XERCES_CPP_NAMESPACE_BEGIN

// ---------------------------------------------------------------------------

//  Libiconv wrapper (low-level conversion utilities collection)

// ---------------------------------------------------------------------------

class XMLUTIL_EXPORT IconvGNUWrapper

{

public:

    // -----------------------------------------------------------------------

    //  Constructors and Destructor

    // -----------------------------------------------------------------------

    IconvGNUWrapper

    (

  iconv_t		cd_from,

  iconv_t		cd_to,

  size_t		uchsize,

  unsigned int	ubo

    );

    virtual ~IconvGNUWrapper();

    // Convert "native unicode" character into XMLCh

    void	mbcToXMLCh (const char *mbc, XMLCh *toRet) const;

    // Convert XMLCh into "native unicode" character

    void	xmlChToMbc (XMLCh xch, char *mbc) const;

    // Return uppercase equivalent for XMLCh

    XMLCh 	toUpper (const XMLCh ch) const;

    // Return uppercase equivalent for XMLCh

    XMLCh 	toLower (const XMLCh ch) const;

    // Check if passed characters belongs to the :space: class

    virtual bool isSpace(const XMLCh toCheck) const;

    // Fill array of XMLCh characters with data, supplyed in the array

    // of "native unicode" characters.

    XMLCh*	mbsToXML (

  const char*	mbs_str,

  size_t		mbs_cnt,

  XMLCh*		xml_str,

  size_t		xml_cnt

    ) const;

    // Fill array of "native unicode" characters with data, supplyed

    // in the array of XMLCh characters.

    char*	xmlToMbs

    (

  const XMLCh*	xml_str,

  size_t		xml_cnt,

  char*		mbs_str,

  size_t		mbs_cnt

    ) const;

    // Wrapper aroung the iconv() for transcoding from the local charset

    size_t	iconvFrom

    (

  const char	*fromPtr,

  size_t		*fromLen,

  char		**toPtr,

  size_t		toLen

    ) const;

    // Wrapper aroung the iconv() for transcoding to the local charset

    size_t	iconvTo

    (

  const char	*fromPtr,

  size_t		*fromLen,

  char		**toPtr,

  size_t		toLen

    ) const;

    // Private data accessors

    inline iconv_t	cdTo () const { return fCDTo; }

    inline iconv_t	cdFrom () const { return fCDFrom; }

    inline size_t	uChSize () const { return fUChSize; }

    inline unsigned int	UBO () const { return fUBO; }

protected:

    // Hiden defaull constructor

    IconvGNUWrapper();

    // Private data accessors

    inline void	setCDTo (iconv_t cd) { fCDTo = cd; }

    inline void	setCDFrom (iconv_t cd) { fCDFrom = cd; }

    inline void	setUChSize (size_t sz) { fUChSize = sz; }

    inline void	setUBO (unsigned int u) { fUBO = u; }

private:

    // -----------------------------------------------------------------------

    //  Unimplemented constructors and operators

    // -----------------------------------------------------------------------

    IconvGNUWrapper(const IconvGNUWrapper&);

    IconvGNUWrapper& operator=(const IconvGNUWrapper&);

    // -----------------------------------------------------------------------

    //  Private data members

    //

    //  fCDTo

    //	    Characterset conversion descriptor TO the local-host encoding

    //  fCDFrom

    //	    Characterset conversion descriptor FROM the local-host encoding

    //  fUChSize

    //      Sizeof the "native unicode" character in bytes

    //  fUBO

    //      "Native unicode" characters byte order

    // -----------------------------------------------------------------------

    size_t	fUChSize;

    unsigned int fUBO;

    iconv_t	fCDTo;

    iconv_t	fCDFrom;

};

// ---------------------------------------------------------------------------

//  FreeBSD-specific Transcoding Service implementation

// ---------------------------------------------------------------------------

class XMLUTIL_EXPORT IconvGNUTransService : public XMLTransService, IconvGNUWrapper

{

public :

    // -----------------------------------------------------------------------

    //  Constructors and Destructor

    // -----------------------------------------------------------------------

    IconvGNUTransService();

    ~IconvGNUTransService();

    // -----------------------------------------------------------------------

    //  Implementation of the virtual transcoding service API

    // -----------------------------------------------------------------------

    virtual int compareIString

    (

        const   XMLCh* const    comp1

        , const XMLCh* const    comp2

    );

    virtual int compareNIString

    (

        const   XMLCh* const    comp1

        , const XMLCh* const    comp2

        , const unsigned int    maxChars

    );

    virtual const XMLCh* getId() const;

    virtual bool isSpace(const XMLCh toCheck) const;

    virtual XMLLCPTranscoder* makeNewLCPTranscoder();

    virtual bool supportsSrcOfs() const;

    virtual void upperCase(XMLCh* const toUpperCase) const;

    virtual void lowerCase(XMLCh* const toUpperCase) const;

protected :

    // -----------------------------------------------------------------------

    //  Protected virtual methods

    // -----------------------------------------------------------------------

    virtual XMLTranscoder* makeNewXMLTranscoder

    (

        const   XMLCh* const            encodingName

        ,       XMLTransService::Codes& resValue

        , const unsigned int            blockSize

        ,       MemoryManager* const    manager

    );

private :

    // -----------------------------------------------------------------------

    //  Unimplemented constructors and operators

    // -----------------------------------------------------------------------

    IconvGNUTransService(const IconvGNUTransService&);

    IconvGNUTransService& operator=(const IconvGNUTransService&);

    // -----------------------------------------------------------------------

    //  Private data members

    //

    //  fUnicodeCP

    //      Unicode encoding schema name

    // -----------------------------------------------------------------------

    const char*	fUnicodeCP;

};

//----------------------------------------------------------------------------

// Implementation of the transcoders for arbitrary input characterset is

// supported ONLY through libiconv interface

//----------------------------------------------------------------------------

class XMLUTIL_EXPORT IconvGNUTranscoder : public XMLTranscoder, IconvGNUWrapper

{

public :

    // -----------------------------------------------------------------------

    //  Constructors and Destructor

    // -----------------------------------------------------------------------

    IconvGNUTranscoder(const	XMLCh* const	encodingName

  		, const unsigned int	blockSize

  		,	iconv_t		cd_from

  		,	iconv_t		cd_to

  		,	size_t		uchsize

  		,	unsigned int	ubo

        , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager

    );

    ~IconvGNUTranscoder();

    // -----------------------------------------------------------------------

    //  Implementation of the virtual transcoder interface

    // -----------------------------------------------------------------------

    virtual unsigned int transcodeFrom

    (

        const   XMLByte* const          srcData

        , const unsigned int            srcCount

        ,       XMLCh* const            toFill

        , const unsigned int            maxChars

        ,       unsigned int&           bytesEaten

        ,       unsigned char* const    charSizes

    );

    virtual unsigned int transcodeTo

    (

        const   XMLCh* const	srcData

        , const unsigned int	srcCount

        ,       XMLByte* const	toFill

        , const unsigned int	maxBytes

        ,       unsigned int&	charsEaten

        , const UnRepOpts	options

    );

    virtual bool canTranscodeTo

    (

        const   unsigned int	toCheck

    )   const;

private :

    // -----------------------------------------------------------------------

    //  Unimplemented constructors and operators

    // -----------------------------------------------------------------------

    IconvGNUTranscoder();

    IconvGNUTranscoder(const IconvGNUTranscoder&);

    IconvGNUTranscoder& operator=(const IconvGNUTranscoder&);

};

// ---------------------------------------------------------------------------

//  GNU-specific XMLCh <-> local (host) characterset transcoder

// ---------------------------------------------------------------------------

class XMLUTIL_EXPORT IconvGNULCPTranscoder : public XMLLCPTranscoder, IconvGNUWrapper

{

public :

    // -----------------------------------------------------------------------

    //  Constructors and Destructor

    // -----------------------------------------------------------------------

    IconvGNULCPTranscoder

    (

  iconv_t		from,

  iconv_t		to,

  size_t		uchsize,

  unsigned int	ubo

    );

protected:

    IconvGNULCPTranscoder();	// Unimplemented

public:

    ~IconvGNULCPTranscoder();

    // -----------------------------------------------------------------------

    //  Implementation of the virtual transcoder interface

    // -----------------------------------------------------------------------

    virtual unsigned int calcRequiredSize(const char* const srcText

        , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager);

    virtual unsigned int calcRequiredSize(const XMLCh* const srcText

        , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager);

    virtual char* transcode(const XMLCh* const toTranscode);

    virtual char* transcode(const XMLCh* const toTranscode,

                            MemoryManager* const manager);

    virtual bool transcode

    (

        const   XMLCh* const    toTranscode

        ,       char* const     toFill

        , const unsigned int    maxBytes

        , MemoryManager* const  manager = XMLPlatformUtils::fgMemoryManager

    );

    virtual XMLCh* transcode(const char* const toTranscode);

    virtual XMLCh* transcode(const char* const toTranscode,

                             MemoryManager* const manager);

    virtual bool transcode

    (

        const   char* const     toTranscode

        ,       XMLCh* const    toFill

        , const unsigned int    maxChars

        , MemoryManager* const  manager = XMLPlatformUtils::fgMemoryManager

    );

private :

    // -----------------------------------------------------------------------

    //  Unimplemented constructors and operators

    // -----------------------------------------------------------------------

    IconvGNULCPTranscoder(const IconvGNULCPTranscoder&);

    IconvGNULCPTranscoder& operator=(const IconvGNULCPTranscoder&);

};

XERCES_CPP_NAMESPACE_END

#endif /* ICONVGNUTRANSSERVICE */