[188] | 1 | #ifndef DOMStringPool_HEADER_GUARD_
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| 2 | #define DOMStringPool_HEADER_GUARD_
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| 3 |
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| 4 | /*
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| 5 | * The Apache Software License, Version 1.1
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| 6 | *
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| 7 | * Copyright (c) 2001-2002 The Apache Software Foundation. All rights
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| 8 | * reserved.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without
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| 11 | * modification, are permitted provided that the following conditions
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| 12 | * are met:
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| 13 | *
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| 14 | * 1. Redistributions of source code must retain the above copyright
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| 15 | * notice, this list of conditions and the following disclaimer.
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| 16 | *
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| 17 | * 2. Redistributions in binary form must reproduce the above copyright
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| 18 | * notice, this list of conditions and the following disclaimer in
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| 19 | * the documentation and/or other materials provided with the
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| 20 | * distribution.
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| 21 | *
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| 22 | * 3. The end-user documentation included with the redistribution,
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| 23 | * if any, must include the following acknowledgment:
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| 24 | * "This product includes software developed by the
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| 25 | * Apache Software Foundation (http://www.apache.org/)."
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| 26 | * Alternately, this acknowledgment may appear in the software itself,
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| 27 | * if and wherever such third-party acknowledgments normally appear.
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| 28 | *
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| 29 | * 4. The names "Xerces" and "Apache Software Foundation" must
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| 30 | * not be used to endorse or promote products derived from this
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| 31 | * software without prior written permission. For written
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| 32 | * permission, please contact apache\@apache.org.
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| 33 | *
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| 34 | * 5. Products derived from this software may not be called "Apache",
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| 35 | * nor may "Apache" appear in their name, without prior written
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| 36 | * permission of the Apache Software Foundation.
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| 37 | *
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| 38 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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| 39 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 40 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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| 41 | * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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| 42 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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| 43 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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| 44 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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| 45 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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| 46 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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| 47 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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| 48 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 49 | * SUCH DAMAGE.
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| 50 | * ====================================================================
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| 51 | *
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| 52 | * This software consists of voluntary contributions made by many
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| 53 | * individuals on behalf of the Apache Software Foundation, and was
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| 54 | * originally based on software copyright (c) 2001, International
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| 55 | * Business Machines, Inc., http://www.ibm.com . For more information
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| 56 | * on the Apache Software Foundation, please see
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| 57 | * <http://www.apache.org/>.
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| 58 | */
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| 59 |
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| 60 | /*
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| 61 | * $Id: DOMStringPool.hpp,v 1.5 2004/01/29 11:44:27 cargilld Exp $
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| 62 | */
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| 63 |
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| 64 | //
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| 65 | // This file is part of the internal implementation of the C++ XML DOM.
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| 66 | // It should NOT be included or used directly by application programs.
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| 67 | //
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| 68 | // Applications should include the file <xercesc/dom/DOM.hpp> for the entire
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| 69 | // DOM API, or xercesc/dom/DOM*.hpp for individual DOM classes, where the class
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| 70 | // name is substituded for the *.
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| 71 | //
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| 72 |
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| 73 | #include <xercesc/util/XercesDefs.hpp>
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| 74 |
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| 75 | XERCES_CPP_NAMESPACE_BEGIN
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| 76 |
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| 77 |
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| 78 | struct DOMStringPoolEntry;
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| 79 | class DOMDocumentImpl;
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| 80 |
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| 81 | //
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| 82 | // DOMStringPool is a hash table of XMLCh* Strings.
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| 83 | // Each DOM Document maintains a DOMStringPool containing a XMLCh* String
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| 84 | // for each Element tag name and Attribute Name that has been added
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| 85 | // to the document. When creating additional elements or attributes,
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| 86 | // if the name has been seen before, the already existing string
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| 87 | // will be reused.
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| 88 | //
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| 89 | class DOMStringPool
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| 90 | {
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| 91 | public:
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| 92 | DOMStringPool(int hashTableSize, DOMDocumentImpl *doc);
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| 93 | ~DOMStringPool();
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| 94 |
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| 95 | const XMLCh *getPooledString(const XMLCh *in);
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| 96 |
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| 97 |
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| 98 | private:
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| 99 | DOMStringPool(const DOMStringPool &other); // Copy constructor and assignment
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| 100 | DOMStringPool& operator = (const DOMStringPool &other); // of DOMStringPool are not supported.
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| 101 |
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| 102 |
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| 103 | DOMDocumentImpl *fDoc;
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| 104 | DOMStringPoolEntry **fHashTable;
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| 105 | int fHashTableSize;
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| 106 |
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| 107 | };
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| 108 |
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| 109 |
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| 110 | //
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| 111 | // DOMBuffer is a lightweight text buffer
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| 112 | // The buffer is not nul terminated until some asks to see the raw buffer
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| 113 | // contents. This also avoids overhead during append operations.
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| 114 | class DOMBuffer
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| 115 | {
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| 116 | public :
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| 117 | // -----------------------------------------------------------------------
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| 118 | // Constructors and Destructor
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| 119 | // -----------------------------------------------------------------------
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| 120 | DOMBuffer(DOMDocumentImpl *doc, int capacity = 31);
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| 121 |
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| 122 | DOMBuffer(DOMDocumentImpl *doc, const XMLCh* string);
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| 123 |
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| 124 | ~DOMBuffer()
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| 125 | {
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| 126 | }
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| 127 |
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| 128 | // -----------------------------------------------------------------------
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| 129 | // Buffer Management
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| 130 | // -----------------------------------------------------------------------
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| 131 | void append
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| 132 | (
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| 133 | const XMLCh* const chars
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| 134 | , const unsigned int count = 0
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| 135 | );
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| 136 |
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| 137 | const XMLCh* getRawBuffer() const
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| 138 | {
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| 139 | fBuffer[fIndex] = 0;
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| 140 | return fBuffer;
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| 141 | }
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| 142 |
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| 143 | void reset()
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| 144 | {
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| 145 | fIndex = 0;
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| 146 | fBuffer[0] = 0;
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| 147 | }
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| 148 |
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| 149 | void set
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| 150 | (
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| 151 | const XMLCh* const chars
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| 152 | , const unsigned int count = 0
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| 153 | );
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| 154 |
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| 155 | void chop
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| 156 | (
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| 157 | const unsigned int count
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| 158 | )
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| 159 | {
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| 160 | fBuffer[count] = 0;
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| 161 | fIndex = count;
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| 162 | }
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| 163 |
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| 164 |
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| 165 | // -----------------------------------------------------------------------
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| 166 | // Getters
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| 167 | // -----------------------------------------------------------------------
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| 168 | unsigned int getLen() const
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| 169 | {
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| 170 | return fIndex;
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| 171 | }
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| 172 |
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| 173 | // -----------------------------------------------------------------------
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| 174 | // Private helpers
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| 175 | // -----------------------------------------------------------------------
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| 176 | void expandCapacity(const unsigned int extraNeeded);
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| 177 |
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| 178 |
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| 179 | private :
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| 180 | // -----------------------------------------------------------------------
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| 181 | // Private data members
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| 182 | //
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| 183 | // fBuffer
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| 184 | // The pointer to the buffer data. Its grown as needed. Its always
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| 185 | // one larger than fCapacity, to leave room for the null terminator.
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| 186 | //
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| 187 | // fIndex
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| 188 | // The current index into the buffer, as characters are appended
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| 189 | // to it. If its zero, then the buffer is empty.
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| 190 | //
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| 191 | // fCapacity
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| 192 | // The current capacity of the buffer. Its actually always one
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| 193 | // larger, to leave room for the null terminator.
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| 194 | //
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| 195 | // fDoc
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| 196 | // For allocating memory
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| 197 | // -----------------------------------------------------------------------
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| 198 | XMLCh* fBuffer;
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| 199 | unsigned int fIndex;
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| 200 | unsigned int fCapacity;
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| 201 | DOMDocumentImpl* fDoc;
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| 202 |
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| 203 | // -----------------------------------------------------------------------
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| 204 | // Unimplemented constructors and operators
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| 205 | // -----------------------------------------------------------------------
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| 206 | DOMBuffer(const DOMBuffer &);
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| 207 | DOMBuffer & operator = (const DOMBuffer &);
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| 208 | };
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| 209 |
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| 210 | XERCES_CPP_NAMESPACE_END
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| 211 |
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| 212 | #endif
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