DOMStringPool.hpp
上传用户:zhuqijet
上传日期:2013-06-25
资源大小:10074k
文件大小:7k
- #ifndef DOMStringPool_HEADER_GUARD_
- #define DOMStringPool_HEADER_GUARD_
- /*
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 2001-2002 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
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * 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) 2001, International
- * Business Machines, Inc., http://www.ibm.com . For more information
- * on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
- /*
- * $Id: DOMStringPool.hpp,v 1.4 2003/03/07 18:07:17 tng Exp $
- */
- //
- // This file is part of the internal implementation of the C++ XML DOM.
- // It should NOT be included or used directly by application programs.
- //
- // Applications should include the file <xercesc/dom/DOM.hpp> for the entire
- // DOM API, or xercesc/dom/DOM*.hpp for individual DOM classes, where the class
- // name is substituded for the *.
- //
- #include <xercesc/util/XercesDefs.hpp>
- XERCES_CPP_NAMESPACE_BEGIN
- struct DOMStringPoolEntry;
- class DOMDocumentImpl;
- //
- // DOMStringPool is a hash table of XMLCh* Strings.
- // Each DOM Document maintains a DOMStringPool containing a XMLCh* String
- // for each Element tag name and Attribute Name that has been added
- // to the document. When creating additional elements or attributes,
- // if the name has been seen before, the already existing string
- // will be reused.
- //
- class DOMStringPool
- {
- public:
- DOMStringPool(int hashTableSize, DOMDocumentImpl *doc);
- ~DOMStringPool();
- const XMLCh *getPooledString(const XMLCh *in);
- private:
- DOMStringPool(const DOMStringPool &other); // Copy constructor and assignment
- DOMStringPool& operator = (const DOMStringPool &other); // of DOMStringPool are not supported.
- DOMDocumentImpl *fDoc;
- DOMStringPoolEntry **fHashTable;
- int fHashTableSize;
- };
- //
- // DOMBuffer is a lightweight text buffer
- // The buffer is not nul terminated until some asks to see the raw buffer
- // contents. This also avoids overhead during append operations.
- class DOMBuffer
- {
- public :
- // -----------------------------------------------------------------------
- // Constructors and Destructor
- // -----------------------------------------------------------------------
- DOMBuffer(DOMDocumentImpl *doc, int capacity = 31);
- DOMBuffer(DOMDocumentImpl *doc, const XMLCh* string);
- ~DOMBuffer()
- {
- }
- // -----------------------------------------------------------------------
- // Buffer Management
- // -----------------------------------------------------------------------
- void append
- (
- const XMLCh* const chars
- , const unsigned int count = 0
- );
- const XMLCh* getRawBuffer() const
- {
- fBuffer[fIndex] = 0;
- return fBuffer;
- }
- void reset()
- {
- fIndex = 0;
- fBuffer[0] = 0;
- }
- void set
- (
- const XMLCh* const chars
- , const unsigned int count = 0
- );
- void chop
- (
- const unsigned int count
- )
- {
- fBuffer[count] = 0;
- fIndex = count;
- }
- // -----------------------------------------------------------------------
- // Getters
- // -----------------------------------------------------------------------
- unsigned int getLen() const
- {
- return fIndex;
- }
- // -----------------------------------------------------------------------
- // Private helpers
- // -----------------------------------------------------------------------
- void expandCapacity(const unsigned int extraNeeded);
- private :
- // -----------------------------------------------------------------------
- // Private data members
- //
- // fBuffer
- // The pointer to the buffer data. Its grown as needed. Its always
- // one larger than fCapacity, to leave room for the null terminator.
- //
- // fIndex
- // The current index into the buffer, as characters are appended
- // to it. If its zero, then the buffer is empty.
- //
- // fCapacity
- // The current capacity of the buffer. Its actually always one
- // larger, to leave room for the null terminator.
- //
- // fDoc
- // For allocating memory
- // -----------------------------------------------------------------------
- XMLCh* fBuffer;
- unsigned int fIndex;
- unsigned int fCapacity;
- DOMDocumentImpl* fDoc;
- };
- XERCES_CPP_NAMESPACE_END
- #endif