source: NonGTP/Xerces/xercesc/dom/impl/DOMStringPool.hpp @ 188

Revision 188, 7.1 KB checked in by mattausch, 19 years ago (diff)

added xercesc to support

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