Xerces-C++ 3.1.3

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XMLBigInteger.hpp
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1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 /*
19 * $Id: XMLBigInteger.hpp 932887 2010-04-11 13:04:59Z borisk $
20 */
21
22 #if !defined(XERCESC_INCLUDE_GUARD_XML_BIGINTEGER_HPP)
23 #define XERCESC_INCLUDE_GUARD_XML_BIGINTEGER_HPP
24
25 #include <xercesc/util/XMemory.hpp>
26 #include <xercesc/util/XMLString.hpp>
27
28 XERCES_CPP_NAMESPACE_BEGIN
29
30 class XMLUTIL_EXPORT XMLBigInteger : public XMemory
31 {
32 public:
33
47 XMLBigInteger
48 (
49 const XMLCh* const strValue
50 , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager
51 );
52 ~XMLBigInteger();
53
54 XMLBigInteger(const XMLBigInteger& toCopy);
55
56 static XMLCh* getCanonicalRepresentation
57 (
58 const XMLCh* const rawData
59 , MemoryManager* const memMgr = XMLPlatformUtils::fgMemoryManager
60 , bool isNonPositiveInteger = false
61 );
62
63 static void parseBigInteger(const XMLCh* const toConvert
64 , XMLCh* const retBuffer
65 , int& signValue
66 , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager);
67
68 static int compareValues(const XMLBigInteger* const lValue
69 ,const XMLBigInteger* const rValue
70 , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager);
71
72
73 static int compareValues(const XMLCh* const lString
74 , const int& lSign
75 , const XMLCh* const rString
76 , const int& rSign
77 , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager);
78
79 void multiply(const unsigned int byteToShift);
80
81 void divide(const unsigned int byteToShift);
82
83 unsigned int getTotalDigit() const;
84
90 inline XMLCh* getRawData() const;
91
102 bool operator==(const XMLBigInteger& toCompare) const;
103
108 int getSign() const;
109
110 int intValue() const;
111
112 private:
113 // -----------------------------------------------------------------------
114 // Unimplemented constructors and operators
115 // -----------------------------------------------------------------------
116 XMLBigInteger& operator=(const XMLBigInteger&);
117
118
119 void setSign(int);
120
121 /*
122 * The number is internally stored in "minimal" sign-fMagnitude format
123 * (i.e., no BigIntegers have a leading zero byte in their magnitudes).
124 * Zero is represented with a signum of 0 (and a zero-length fMagnitude).
125 * Thus, there is exactly one representation for each value.
126 */
127 // -----------------------------------------------------------------------
128 // Private data members
129 //
130 // fSign
131 // to represent the sign of the number.
132 //
133 // fMagnitude
134 // the buffer holding the number.
135 //
136 // fRawData
137 // to preserve the original string used to construct this object,
138 // needed for pattern matching.
139 //
140 // -----------------------------------------------------------------------
141
142 int fSign;
143 XMLCh* fMagnitude; //null terminated
144 XMLCh* fRawData;
145 MemoryManager* fMemoryManager;
146 };
147
148 inline int XMLBigInteger::getSign() const
149 {
150 return fSign;
151 }
152
153 inline unsigned int XMLBigInteger::getTotalDigit() const
154 {
155 return ((getSign() ==0) ? 0 : (unsigned int)XMLString::stringLen(fMagnitude));
156 }
157
158 inline bool XMLBigInteger::operator==(const XMLBigInteger& toCompare) const
159 {
160 return ( compareValues(this, &toCompare, fMemoryManager) ==0 ? true : false);
161 }
162
163 inline void XMLBigInteger::setSign(int newSign)
164 {
165 fSign = newSign;
166 }
167
168 inline XMLCh* XMLBigInteger::getRawData() const
169 {
170 return fRawData;
171 }
172
173 XERCES_CPP_NAMESPACE_END
174
175 #endif