IDStringPool.cpp
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上传日期:2007-01-10
资源大小:6948k
文件大小:6k
源码类别:
xml/soap/webservice
开发平台:
C/C++
- /*
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 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,
- * 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/>.
- */
- /*
- * $Log: IDStringPool.cpp,v $
- * Revision 1.11 2001/10/25 21:47:58 peiyongz
- * Unused XMLDeleterFor removed.
- *
- * Revision 1.10 2001/08/07 15:34:54 tng
- * IDOM: Unaligned Access warnings in IDOM samples. Fixed by Kari Whitcomb.
- *
- * Revision 1.9 2001/06/07 14:26:36 tng
- * IDOM: some compiler (solaris cc/hp acc) requires memory to align, otherwise core dump.
- *
- * Revision 1.8 2001/06/04 20:44:15 tng
- * IDOM: Comment should say XMLCh instead of DOMString
- *
- * Revision 1.7 2001/05/31 16:09:35 tng
- * IDOM: Error checking if operator new fails
- *
- * Revision 1.6 2001/05/29 20:06:36 tng
- * IDOM: fix wrong void* p cast
- *
- * Revision 1.5 2001/05/29 18:49:58 tng
- * IDOM: call allocate directly for array allocation to avoid overloading operator new[] which leads to compilation error on SUN CC 4.2
- *
- * Revision 1.4 2001/05/23 13:11:39 tng
- * IDOM: Memory fix.
- *
- * Revision 1.3 2001/05/17 15:58:49 tng
- * IDOM: Add Unix build, and other idom udpates.
- *
- * Revision 1.2 2001/05/11 13:25:58 tng
- * Copyright update.
- *
- * Revision 1.1.1.1 2001/04/03 00:14:34 andyh
- * IDOM
- *
- */
- //
- // file DStringPool.cpp
- //
- #include "IDStringPool.hpp"
- //#include <util/XMLDeleterFor.hpp>
- #include <util/XMLString.hpp>
- #include <util/PlatformUtils.hpp>
- #include "IDDocumentImpl.hpp"
- //
- // DStringPoolEntry - one of these structs is allocated for each
- // XMLCh String in the pool. Each slot in the
- // hash table array itself is a pointer to the head
- // of a singly-linked list of these structs.
- //
- // Although this struct is delcared with a string length of one,
- // the factory method allocates enough storage to hold the full
- // string length.
- //
- struct IDStringPoolEntry
- {
- IDStringPoolEntry *fNext;
- XMLCh fString[1];
- };
- //
- // createSPE - factory method for creating sting pool entry structs.
- // Allocates sufficient storage to hold the entire string
- //
- static IDStringPoolEntry *createSPE(const XMLCh *str, IDDocumentImpl *doc)
- {
- // Compute size to allocate. Note that there's 1 char of string declared in the
- // struct, so we don't need to add one again to account for the trailing null.
- //
- size_t sizeToAllocate = sizeof(IDStringPoolEntry) + XMLString::stringLen(str)*sizeof(XMLCh);
- IDStringPoolEntry *newSPE = (IDStringPoolEntry *)doc->allocate(sizeToAllocate);
- newSPE->fNext = 0;
- XMLCh * nonConstStr = (XMLCh *)newSPE->fString;
- XMLString::copyString(nonConstStr, str);
- return newSPE;
- }
- IDStringPool::IDStringPool(int hashTableSize, IDDocumentImpl *doc)
- {
- fDoc = doc; // needed to get access to the doc's storage allocator.
- fHashTableSize = hashTableSize;
- //fHashTable = new (fDoc) IDStringPoolEntry *[hashTableSize];
- void* p = doc->allocate(sizeof(IDStringPoolEntry*) * hashTableSize);
- fHashTable = (IDStringPoolEntry**) p;
- for (int i=0; i<fHashTableSize; i++)
- fHashTable[i] = 0;
- };
- // Destructor. Nothing to do, since storage all belongs to the document.
- //
- IDStringPool::~IDStringPool()
- {
- };
- const XMLCh *IDStringPool::getPooledString(const XMLCh *in)
- {
- IDStringPoolEntry **pspe;
- IDStringPoolEntry *spe;
- int inHash = XMLString::hash(in, fHashTableSize);
- pspe = &fHashTable[inHash];
- while (*pspe != 0)
- {
- if (XMLString::compareString((*pspe)->fString, in) == 0)
- return (*pspe)->fString;
- pspe = &((*pspe)->fNext);
- }
- // This string hasn't been seen before. Add it to the pool.
- *pspe = spe = createSPE(in, fDoc);
- return spe->fString;
- };