src/xercesc/util/KVStringPair.cpp

/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999-2001 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,
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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/>.
 */

/*
 * $Log$
 * Revision 1.1  2002/02/01 22:22:10  peiyongz
 * Initial revision
 *
 * Revision 1.5  2001/05/11 13:26:27  tng
 * Copyright update.
 *
 * Revision 1.4  2001/01/15 21:26:33  tng
 * Performance Patches by David Bertoni.
 *
 * Details: (see xerces-c-dev mailing Jan 14)
 * XMLRecognizer.cpp: the internal encoding string XMLUni::fgXMLChEncodingString
 * was going through this function numerous times.  As a result, the top hot-spot
 * for the parse was _wcsicmp().  The real problem is that the Microsofts wide string
 * functions are unbelievably slow.  For things like encodings, it might be
 * better to use a special comparison function that only considers a-z and
 * A-Z as characters with case.  This works since the character set for
 * encodings is limit to printable ASCII characters.
 *
 *  XMLScanner2.cpp: This also has some case-sensitive vs. insensitive compares.
 * They are also much faster.  The other tweak is to only make a copy of an attribute
 * string if it needs to be split.  And then, the strategy is to try to use a
 * stack-based buffer, rather than a dynamically-allocated one.
 *
 * SAX2XMLReaderImpl.cpp: Again, more case-sensitive vs. insensitive comparisons.
 *
 * KVStringPair.cpp & hpp: By storing the size of the allocation, the storage can
 * likely be re-used many times, cutting down on dynamic memory allocations.
 *
 * XMLString.hpp: a more efficient implementation of stringLen().
 *
 * DTDValidator.cpp: another case of using a stack-based buffer when possible
 *
 * These patches made a big difference in parse time in some of our test
 * files, especially the ones are very attribute-heavy.
 *
 * Revision 1.3  2000/03/02 19:54:40  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 1.2  2000/02/06 07:48:02  rahulj
 * Year 2K copyright swat.
 *
 * Revision 1.1.1.1  1999/11/09 01:04:33  twl
 * Initial checkin
 *
 * Revision 1.2  1999/11/08 20:45:08  rahul
 * Swat for adding in Product name and CVS comment log variable.
 *
 */


// ---------------------------------------------------------------------------
//  Includes
// ---------------------------------------------------------------------------
#include <xercesc/util/KVStringPair.hpp>
#include <xercesc/util/XMLString.hpp>


// ---------------------------------------------------------------------------
//  KVStringPair: Constructors and Destructor
// ---------------------------------------------------------------------------
KVStringPair::KVStringPair() :

    fKey(0)
    , fKeyAllocSize(0)
    , fValue(0)
    , fValueAllocSize(0)
{
}

KVStringPair::KVStringPair(const XMLCh* const key, const XMLCh* const value) :

    fKey(0)
    , fKeyAllocSize(0)
    , fValue(0)
    , fValueAllocSize(0)
{
   set(key, value);
}

KVStringPair::KVStringPair(const KVStringPair& toCopy) :

    fKey(0)
    , fKeyAllocSize(0)
    , fValue(0)
    , fValueAllocSize(0)
{
   set(toCopy.fKey, toCopy.fValue);
}

KVStringPair::~KVStringPair()
{
    delete [] fKey;
    delete [] fValue;
}


// ---------------------------------------------------------------------------
//  KVStringPair: Getters
// ---------------------------------------------------------------------------
const XMLCh* KVStringPair::getKey() const
{
    return fKey;
}

XMLCh* KVStringPair::getKey()
{
    return fKey;
}

const XMLCh* KVStringPair::getValue() const
{
    return fValue;
}

XMLCh* KVStringPair::getValue()
{
    return fValue;
}


// ---------------------------------------------------------------------------
//  KVStringPair: Setters
// ---------------------------------------------------------------------------
void KVStringPair::setKey(const XMLCh* const newKey)
{
   const unsigned int  len = XMLString::stringLen(newKey);

    if (len >= fKeyAllocSize)
   {
    delete [] fKey;
        fKeyAllocSize = len + 1;
        fKey = new XMLCh[fKeyAllocSize];
   }

    XMLString::copyString(fKey, newKey);
}

void KVStringPair::setValue(const XMLCh* const newValue)
{
   const unsigned int  len = XMLString::stringLen(newValue);

    if (len >= fValueAllocSize)
   {
    delete [] fValue;
        fValueAllocSize = len + 1;
        fValue = new XMLCh[fValueAllocSize];
   }

    XMLString::copyString(fValue, newValue);
}

void KVStringPair::set(  const   XMLCh* const    newKey
                                , const XMLCh* const    newValue)
{
    setKey(newKey);
    setValue(newValue);
}