XML256TableTranscoder.hpp
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- /*
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 1999-2000 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Xerces" and "Apache Software Foundation" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * nor may "Apache" appear in their name, without prior written
- * permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * 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
- * Business Machines, Inc., http://www.ibm.com . For more information
- * on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
- /*
- * $Log: XML256TableTranscoder.hpp,v $
- * Revision 1.3 2003/03/07 18:11:55 tng
- * Return a reference instead of void for operator=
- *
- * Revision 1.2 2002/11/04 15:22:05 tng
- * C++ Namespace Support.
- *
- * Revision 1.1.1.1 2002/02/01 22:22:13 peiyongz
- * sane_include
- *
- * Revision 1.1 2000/03/18 00:00:32 roddey
- * Initial updates for two way transcoding support
- *
- */
- #ifndef XML256TABLETRANSCODER_HPP
- #define XML256TABLETRANSCODER_HPP
- #include <xercesc/util/TransService.hpp>
- XERCES_CPP_NAMESPACE_BEGIN
- //
- // 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&);
- XML256TableTranscoder& 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;
- };
- XERCES_CPP_NAMESPACE_END
- #endif