/* * Copyright 1999-2004 The Apache Software Foundation. *  * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at *  *      http://www.apache.org/licenses/LICENSE-2.0 *  * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *//* * $Log: StringPool.cpp,v $ * Revision 1.11  2004/09/08 13:56:23  peiyongz * Apache License Version 2.0 * * Revision 1.10  2004/03/02 23:21:37  peiyongz * eliminate leakage * * Revision 1.9  2004/01/29 11:48:46  cargilld * Code cleanup changes to get rid of various compiler diagnostic messages. * * Revision 1.8  2003/12/17 00:18:35  cargilld * Update to memory management so that the static memory manager (one used to call Initialize) is only for static data. * * Revision 1.7  2003/10/29 16:18:41  peiyongz * Implement serialization/deserialization * * Revision 1.6  2003/10/09 13:49:30  neilg * make StringPool functions virtual so that we can implement a synchronized version of StringPool for thread-safe updates. * * Revision 1.5  2003/05/18 14:02:05  knoaman * Memory manager implementation: pass per instance manager. * * Revision 1.4  2003/05/16 06:01:52  knoaman * Partial implementation of the configurable memory manager. * * Revision 1.3  2003/05/15 19:07:45  knoaman * Partial implementation of the configurable memory manager. * * Revision 1.2  2002/11/04 15:22:04  tng * C++ Namespace Support. * * Revision 1.1.1.1  2002/02/01 22:22:12  peiyongz * sane_include * * Revision 1.6  2001/10/22 15:43:35  tng * [Bug 3361] "String pool id was not legal" error in Attributes::getURI(). * * Revision 1.5  2000/07/07 22:16:51  jpolast * remove old put(value) function.  use put(key,value) instead. * * Revision 1.4  2000/05/15 22:31:20  andyh * Replace #include<memory.h> with <string.h> everywhere. * * Revision 1.3  2000/03/02 19:54:46  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 07:48:04  rahulj * Year 2K copyright swat. * * Revision 1.1.1.1  1999/11/09 01:05:10  twl * Initial checkin * * Revision 1.2  1999/11/08 20:45:14  rahul * Swat for adding in Product name and CVS comment log variable. * */// ---------------------------------------------------------------------------//  Includes// ---------------------------------------------------------------------------#include <xercesc/util/StringPool.hpp>#include <assert.h>XERCES_CPP_NAMESPACE_BEGIN// ---------------------------------------------------------------------------//  StringPool::PoolElem: Constructors and Destructor// ---------------------------------------------------------------------------XMLStringPool::PoolElem::PoolElem( const   XMLCh* const string                                 , const unsigned int id                                 , MemoryManager* const manager) :    fId(id)    , fString(0)    , fMemoryManager(manager){    fString = XMLString::replicate(string, fMemoryManager);}XMLStringPool::PoolElem::~PoolElem(){    fMemoryManager->deallocate(fString); //delete [] fString;}// ---------------------------------------------------------------------------//  StringPool::PoolElem: Public methods// ---------------------------------------------------------------------------voidXMLStringPool::PoolElem::reset(const XMLCh* const string, const unsigned int id){    fId = id;    fMemoryManager->deallocate(fString);//delete [] fString;    fString = XMLString::replicate(string, fMemoryManager);}// ---------------------------------------------------------------------------//  XMLStringPool: Constructors and Destructor// ---------------------------------------------------------------------------XMLStringPool::XMLStringPool(const  unsigned int  modulus,                             MemoryManager* const manager) :    fMemoryManager(manager)    , fIdMap(0)    , fHashTable(0)    , fMapCapacity(64)    , fCurId(1){    // Create the hash table, passing it the modulus    fHashTable = new (fMemoryManager) RefHashTableOf<PoolElem>(modulus, fMemoryManager);    // Do an initial allocation of the id map and zero it all out    fIdMap = (PoolElem**) fMemoryManager->allocate    (        fMapCapacity * sizeof(PoolElem*)    ); //new PoolElem*[fMapCapacity];    memset(fIdMap, 0, sizeof(PoolElem*) * fMapCapacity);}XMLStringPool::~XMLStringPool(){    delete fHashTable;    fMemoryManager->deallocate(fIdMap); //delete [] fIdMap;}// ---------------------------------------------------------------------------//  XMLStringPool: Pool management methods// ---------------------------------------------------------------------------unsigned int XMLStringPool::addOrFind(const XMLCh* const newString){    PoolElem* elemToFind = fHashTable->get(newString);    if (elemToFind)        return elemToFind->fId;    return addNewEntry(newString);}bool XMLStringPool::exists(const XMLCh* const newString) const{    return fHashTable->containsKey(newString);}bool XMLStringPool::exists(const unsigned int id) const{    if (!id || (id >= fCurId))        return false;    return true;}void XMLStringPool::flushAll(){    fCurId = 1;    fHashTable->removeAll();}unsigned int XMLStringPool::getId(const XMLCh* const toFind) const{    PoolElem* elemToFind = fHashTable->get(toFind);    if (elemToFind)        return elemToFind->fId;    // Not found, so return zero, which is never a legal id    return 0;}const XMLCh* XMLStringPool::getValueForId(const unsigned int id) const{    if (!id || (id >= fCurId))        ThrowXMLwithMemMgr(IllegalArgumentException, XMLExcepts::StrPool_IllegalId, fMemoryManager);    // Just index the id map and return that element's string    return fIdMap[id]->fString;}unsigned int XMLStringPool::getStringCount() const{    return fCurId-1;}// ---------------------------------------------------------------------------//  XMLStringPool: Private helper methods// ---------------------------------------------------------------------------unsigned int XMLStringPool::addNewEntry(const XMLCh* const newString){    // See if we need to expand the id map    if (fCurId == fMapCapacity)    {        // Calculate the new capacity, create a temp new map, and zero it        const unsigned int newCap = (unsigned int)(fMapCapacity * 1.5);        PoolElem** newMap = (PoolElem**) fMemoryManager->allocate        (            newCap * sizeof(PoolElem*)        ); //new PoolElem*[newCap];        memset(newMap, 0, sizeof(PoolElem*) * newCap);        //        //  Copy over the old elements from the old map. They are just pointers        //  so we can do it all at once.        //        memcpy(newMap, fIdMap, sizeof(PoolElem*) * fMapCapacity);        // Clean up the old map and store the new info        fMemoryManager->deallocate(fIdMap); //delete [] fIdMap;        fIdMap = newMap;        fMapCapacity = newCap;    }    //    //  Ok, now create a new element and add it to the hash table. Then store    //  this new element in the id map at the current id index, then bump the    //  id index.    //    PoolElem* newElem = new (fMemoryManager) PoolElem(newString, fCurId, fMemoryManager);    fHashTable->put((void*)(newElem->getKey()), newElem);    fIdMap[fCurId] = newElem;    // Bump the current id and return the id of the new elem we just added    fCurId++;    return newElem->fId;}/*** * Support for Serialization/De-serialization ***/IMPL_XSERIALIZABLE_TOCREATE(XMLStringPool)void XMLStringPool::serialize(XSerializeEngine& serEng){    /***     * Since we are pretty sure that fIdMap and fHashTable is      * not shared by any other object, therefore there is no owned/referenced     * issue. Thus we can serialize the raw data only, rather than serializing      * both fIdMap and fHashTable.     *     * And we can rebuild the fIdMap and fHashTable out of the raw data during     * deserialization.     *    ***/    if (serEng.isStoring())    {        serEng<<fCurId;        for (unsigned int index = 1; index < fCurId; index++)        {            const XMLCh* stringData = getValueForId(index);            serEng.writeString(stringData);        }    }    else    {        unsigned int mapSize;        serEng>>mapSize;        assert(1 == fCurId);  //make sure empty        for (unsigned int index = 1; index < mapSize; index++)        {            XMLCh* stringData;            serEng.readString(stringData);            addNewEntry(stringData);            //we got to deallocate this string             //since stringpool will duplicate this string in the PoolElem and own that copy            fMemoryManager->deallocate(stringData);        }    }}XMLStringPool::XMLStringPool(MemoryManager* const manager) :    fMemoryManager(manager)    , fIdMap(0)    , fHashTable(0)    , fMapCapacity(64)    , fCurId(1){    // Create the hash table, passing it the modulus    fHashTable = new (fMemoryManager) RefHashTableOf<PoolElem>(109, fMemoryManager);    // Do an initial allocation of the id map and zero it all out    fIdMap = (PoolElem**) fMemoryManager->allocate    (        fMapCapacity * sizeof(PoolElem*)    ); //new PoolElem*[fMapCapacity];    memset(fIdMap, 0, sizeof(PoolElem*) * fMapCapacity);}XERCES_CPP_NAMESPACE_END