XMLBuffer.hpp
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- /*
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 1999-2003 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) 1999, International
- * Business Machines, Inc., http://www.ibm.com . For more information
- * on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
- /*
- * $Log: XMLBuffer.hpp,v $
- * Revision 1.5 2003/05/16 21:36:55 knoaman
- * Memory manager implementation: Modify constructors to pass in the memory manager.
- *
- * Revision 1.4 2003/05/15 18:26:07 knoaman
- * Partial implementation of the configurable memory manager.
- *
- * Revision 1.3 2002/11/04 15:00:21 tng
- * C++ Namespace Support.
- *
- * Revision 1.2 2002/08/21 18:54:52 tng
- * [Bug 11869] Add the const modifier (XMLBuffer.hpp).
- *
- * Revision 1.1.1.1 2002/02/01 22:21:51 peiyongz
- * sane_include
- *
- * Revision 1.6 2001/06/27 20:29:09 tng
- * [Bug 2365] Huge performance problem with the parser in XMLScanner::sendCharData() . By David Bertoni.
- *
- * Revision 1.5 2000/03/02 19:54:24 roddey
- * This checkin includes many changes done while waiting for the
- * 1.1.0 code to be finished. I can't list them all here, but a list is
- * available elsewhere.
- *
- * Revision 1.4 2000/02/24 20:00:22 abagchi
- * Swat for removing Log from API docs
- *
- * Revision 1.3 2000/02/15 01:21:30 roddey
- * Some initial documentation improvements. More to come...
- *
- * Revision 1.2 2000/02/06 07:47:47 rahulj
- * Year 2K copyright swat.
- *
- * Revision 1.1.1.1 1999/11/09 01:08:29 twl
- * Initial checkin
- *
- * Revision 1.2 1999/11/08 20:44:36 rahul
- * Swat for adding in Product name and CVS comment log variable.
- *
- */
- #if !defined(XMLBUFFER_HPP)
- #define XMLBUFFER_HPP
- #include <xercesc/util/XMemory.hpp>
- #include <xercesc/util/PlatformUtils.hpp>
- #include <xercesc/framework/MemoryManager.hpp>
- XERCES_CPP_NAMESPACE_BEGIN
- /**
- * XMLBuffer is a lightweight, expandable Unicode text buffer. Since XML is
- * inherently theoretically unbounded in terms of the sizes of things, we
- * very often need to have expandable buffers. The primary concern here is
- * that appends of characters and other buffers or strings be very fast, so
- * it always maintains the current buffer size.
- *
- * The buffer is not nul terminated until some asks to see the raw buffer
- * contents. This also avoids overhead during append operations.
- */
- class XMLPARSER_EXPORT XMLBuffer : public XMemory
- {
- public :
- // -----------------------------------------------------------------------
- // Constructors and Destructor
- // -----------------------------------------------------------------------
- /** @name Constructor */
- //@{
- XMLBuffer(int capacity = 1023
- , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager) :
- fUsed(false)
- , fIndex(0)
- , fCapacity(capacity)
- , fMemoryManager(manager)
- , fBuffer(0)
- {
- // Buffer is one larger than capacity, to allow for zero term
- fBuffer = (XMLCh*) manager->allocate((capacity+1) * sizeof(XMLCh)); //new XMLCh[fCapacity+1];
- // Keep it null terminated
- fBuffer[0] = XMLCh(0);
- }
- //@}
- /** @name Destructor */
- //@{
- ~XMLBuffer()
- {
- fMemoryManager->deallocate(fBuffer); //delete [] fBuffer;
- }
- //@}
- // -----------------------------------------------------------------------
- // Buffer Management
- // -----------------------------------------------------------------------
- void append(const XMLCh toAppend)
- {
- if (fIndex == fCapacity)
- expand();
- // Put in char and bump the index
- fBuffer[fIndex++] = toAppend;
- }
- void append
- (
- const XMLCh* const chars
- , const unsigned int count = 0
- );
- const XMLCh* getRawBuffer() const
- {
- fBuffer[fIndex] = 0;
- return fBuffer;
- }
- XMLCh* getRawBuffer()
- {
- fBuffer[fIndex] = 0;
- return fBuffer;
- }
- void reset()
- {
- fIndex = 0;
- fBuffer[0] = 0;
- }
- void set
- (
- const XMLCh* const chars
- , const unsigned int count = 0
- );
- // -----------------------------------------------------------------------
- // Getters
- // -----------------------------------------------------------------------
- bool getInUse() const
- {
- return fUsed;
- }
- unsigned int getLen() const
- {
- return fIndex;
- }
- bool isEmpty() const
- {
- return (fIndex == 0);
- }
- // -----------------------------------------------------------------------
- // Setters
- // -----------------------------------------------------------------------
- void setInUse(const bool newValue)
- {
- fUsed = newValue;
- }
- private :
- // -----------------------------------------------------------------------
- // Declare our friends
- // -----------------------------------------------------------------------
- friend class XMLBufBid;
- // -----------------------------------------------------------------------
- // Private helpers
- // -----------------------------------------------------------------------
- void expand();
- void insureCapacity(const unsigned int extraNeeded);
- // -----------------------------------------------------------------------
- // 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.
- //
- // fUsed
- // Indicates whether this buffer is in use or not.
- // -----------------------------------------------------------------------
- bool fUsed;
- unsigned int fIndex;
- unsigned int fCapacity;
- MemoryManager* fMemoryManager;
- XMLCh* fBuffer;
- };
- XERCES_CPP_NAMESPACE_END
- #endif