XML256TableTranscoder.hpp
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上传日期:2007-01-10
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xml/soap/webservice
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C/C++
- /*
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- * 1. Redistributions of source code must retain the above copyright
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- * "This product includes software developed by the
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- * if and wherever such third-party acknowledgments normally appear.
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- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation, and was
- * originally based on software copyright (c) 1999, International
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- /*
- * $Log: XML256TableTranscoder.hpp,v $
- * Revision 1.1 2000/03/18 00:00:32 roddey
- * Initial updates for two way transcoding support
- *
- */
- #ifndef XML256TABLETRANSCODER_HPP
- #define XML256TABLETRANSCODER_HPP
- #include <util/TransService.hpp>
- //
- // This class implements the functionality of a common type of transcoder
- // for an 8 bit, single byte encoding based on a set of 'to' and 'from'
- // translation tables. Actual derived classes are trivial and just have to
- // provide us with pointers to their tables and we do all the work.
- //
- class XMLUTIL_EXPORT XML256TableTranscoder : public XMLTranscoder
- {
- public :
- // -----------------------------------------------------------------------
- // Public constructors and destructor
- // -----------------------------------------------------------------------
- virtual ~XML256TableTranscoder();
- // -----------------------------------------------------------------------
- // The virtual transcoding 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;
- protected :
- // -----------------------------------------------------------------------
- // Hidden constructors
- // -----------------------------------------------------------------------
- XML256TableTranscoder
- (
- const XMLCh* const encodingName
- , const unsigned int blockSize
- , const XMLCh* const fromTable
- , const XMLTransService::TransRec* const toTable
- , const unsigned int toTableSize
- );
- // -----------------------------------------------------------------------
- // Protected helper methods
- // -----------------------------------------------------------------------
- XMLByte xlatOneTo
- (
- const XMLCh toXlat
- ) const;
- private :
- // -----------------------------------------------------------------------
- // Unimplemented constructors and operators
- // -----------------------------------------------------------------------
- XML256TableTranscoder();
- XML256TableTranscoder(const XML256TableTranscoder&);
- void operator=(const XML256TableTranscoder&);
- // -----------------------------------------------------------------------
- // Private data members
- //
- // fFromTable
- // This is the 'from' table that we were given during construction.
- // It is a 256 entry table of XMLCh chars. Each entry is the
- // Unicode code point for the external encoding point of that value.
- // So fFromTable[N] is the Unicode translation of code point N of
- // the source encoding.
- //
- // We don't own this table, we just refer to it. It is assumed that
- // the table is static, for performance reasons.
- //
- // fToSize
- // The 'to' table is variable sized. This indicates how many records
- // are in it.
- //
- // fToTable
- // This is a variable sized table of TransRec structures. It must
- // be sorted by the intCh field, i.e. the XMLCh field. It is searched
- // binarily to find the record for a particular Unicode char. Then
- // that record's extch field is the translation record.
- //
- // We don't own this table, we just refer to it. It is assumed that
- // the table is static, for performance reasons.
- //
- // NOTE: There may be dups of the extCh field, since there might be
- // multiple Unicode code points which map to the same external code
- // point. Normally this won't happen, since the parser assumes that
- // internalization is normalized, but we have to be prepared to do
- // the right thing if some client code gives us non-normalized data
- // itself.
- // -----------------------------------------------------------------------
- const XMLCh* fFromTable;
- unsigned int fToSize;
- const XMLTransService::TransRec* fToTable;
- };
- #endif