[188] | 1 | /*
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| 2 | * The Apache Software License, Version 1.1
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| 3 | *
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| 4 | * Copyright (c) 2001 The Apache Software Foundation. All rights
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| 5 | * reserved.
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| 6 | *
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| 7 | * Redistribution and use in source and binary forms, with or without
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| 8 | * modification, are permitted provided that the following conditions
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| 9 | * are met:
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| 10 | *
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| 11 | * 1. Redistributions of source code must retain the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer.
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| 13 | *
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| 14 | * 2. Redistributions in binary form must reproduce the above copyright
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| 15 | * notice, this list of conditions and the following disclaimer in
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| 16 | * the documentation and/or other materials provided with the
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| 17 | * distribution.
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| 18 | *
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| 19 | * 3. The end-user documentation included with the redistribution,
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| 20 | * if any, must include the following acknowledgment:
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| 21 | * "This product includes software developed by the
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| 22 | * Apache Software Foundation (http://www.apache.org/)."
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| 23 | * Alternately, this acknowledgment may appear in the software itself,
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| 24 | * if and wherever such third-party acknowledgments normally appear.
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| 25 | *
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| 26 | * 4. The names "Xerces" and "Apache Software Foundation" must
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| 27 | * not be used to endorse or promote products derived from this
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| 28 | * software without prior written permission. For written
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| 29 | * permission, please contact apache\@apache.org.
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| 30 | *
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| 31 | * 5. Products derived from this software may not be called "Apache",
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| 32 | * nor may "Apache" appear in their name, without prior written
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| 33 | * permission of the Apache Software Foundation.
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| 34 | *
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| 35 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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| 36 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 37 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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| 38 | * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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| 39 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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| 40 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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| 41 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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| 42 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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| 43 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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| 44 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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| 45 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 46 | * SUCH DAMAGE.
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| 47 | * ====================================================================
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| 48 | *
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| 49 | * This software consists of voluntary contributions made by many
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| 50 | * individuals on behalf of the Apache Software Foundation, and was
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| 51 | * originally based on software copyright (c) 2001 International
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| 52 | * Business Machines, Inc., http://www.ibm.com . For more information
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| 53 | * on the Apache Software Foundation, please see
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| 54 | * <http://www.apache.org/>.
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| 55 | */
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| 56 |
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| 57 | /*
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| 58 | * $Id: XMLBigInteger.hpp,v 1.12 2004/01/29 11:48:46 cargilld Exp $
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| 59 | */
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| 60 |
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| 61 | #ifndef XML_BIGINTEGER_HPP
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| 62 | #define XML_BIGINTEGER_HPP
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| 63 |
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| 64 | #include <xercesc/util/XMemory.hpp>
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| 65 | #include <xercesc/util/XMLString.hpp>
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| 66 |
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| 67 | XERCES_CPP_NAMESPACE_BEGIN
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| 68 |
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| 69 | class XMLUTIL_EXPORT XMLBigInteger : public XMemory
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| 70 | {
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| 71 | public:
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| 72 |
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| 73 | /**
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| 74 | * Constructs a newly allocated <code>XMLBigInteger</code> object that
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| 75 | * represents the value represented by the string. The string is
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| 76 | * converted to an int value as if by the <code>valueOf</code> method.
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| 77 | *
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| 78 | * @param strValue the <code>String</code> to be converted to an
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| 79 | * <code>XMLBigInteger</code>.
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| 80 | * @param manager Pointer to the memory manager to be used to
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| 81 | * allocate objects.
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| 82 | * @exception NumberFormatException if the <code>String</code> does not
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| 83 | * contain a parsable XMLBigInteger.
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| 84 | */
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| 85 |
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| 86 | XMLBigInteger
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| 87 | (
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| 88 | const XMLCh* const strValue
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| 89 | , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager
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| 90 | );
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| 91 | ~XMLBigInteger();
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| 92 |
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| 93 | XMLBigInteger(const XMLBigInteger& toCopy);
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| 94 |
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| 95 | static XMLCh* getCanonicalRepresentation
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| 96 | (
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| 97 | const XMLCh* const rawData
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| 98 | , MemoryManager* const memMgr = XMLPlatformUtils::fgMemoryManager
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| 99 | );
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| 100 |
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| 101 | static void parseBigInteger(const XMLCh* const toConvert
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| 102 | , XMLCh* const retBuffer
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| 103 | , int& signValue
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| 104 | , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager);
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| 105 |
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| 106 | static int compareValues(const XMLBigInteger* const lValue
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| 107 | ,const XMLBigInteger* const rValue
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| 108 | , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager);
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| 109 |
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| 110 |
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| 111 | void multiply(const unsigned int byteToShift);
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| 112 |
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| 113 | void divide(const unsigned int byteToShift);
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| 114 |
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| 115 | int getTotalDigit() const;
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| 116 |
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| 117 | /**
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| 118 | *
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| 119 | * Deprecated: please use getRawData
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| 120 | *
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| 121 | * Return a copy of the fMagnitue.
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| 122 | * A leading sign is ALWAYS in place and the caller of this method
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| 123 | * is responsible for the de-allocation of the memory.
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| 124 | */
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| 125 | inline XMLCh* toString() const;
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| 126 |
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| 127 | /**
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| 128 | * Return a copy of the fMagnitue.
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| 129 | * This is similar to toString, except the internal buffer is returned directly
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| 130 | * Caller is not required to delet the returned memory.
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| 131 | */
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| 132 | inline XMLCh* getRawData() const;
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| 133 |
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| 134 | /**
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| 135 | * Compares this object to the specified object.
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| 136 | * The result is <code>true</code> if and only if the argument is not
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| 137 | * <code>null</code> and is an <code>XMLBigInteger</code> object that contains
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| 138 | * the same <code>int</code> value as this object.
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| 139 | *
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| 140 | * @param toCompare the object to compare with.
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| 141 | * @return <code>true</code> if the objects are the same;
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| 142 | * <code>false</code> otherwise.
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| 143 | */
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| 144 | bool operator==(const XMLBigInteger& toCompare) const;
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| 145 |
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| 146 | /**
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| 147 | * Returns the signum function of this number (i.e., -1, 0 or 1 as
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| 148 | * the value of this number is negative, zero or positive).
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| 149 | */
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| 150 | int getSign() const;
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| 151 |
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| 152 | int intValue() const;
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| 153 |
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| 154 | private:
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| 155 | // -----------------------------------------------------------------------
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| 156 | // Unimplemented constructors and operators
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| 157 | // -----------------------------------------------------------------------
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| 158 | XMLBigInteger& operator=(const XMLBigInteger&);
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| 159 |
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| 160 |
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| 161 | void setSign(int);
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| 162 |
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| 163 | /*
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| 164 | * The number is internally stored in "minimal" sign-fMagnitude format
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| 165 | * (i.e., no BigIntegers have a leading zero byte in their magnitudes).
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| 166 | * Zero is represented with a signum of 0 (and a zero-length fMagnitude).
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| 167 | * Thus, there is exactly one representation for each value.
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| 168 | */
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| 169 | // -----------------------------------------------------------------------
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| 170 | // Private data members
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| 171 | //
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| 172 | // fSign
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| 173 | // to represent the sign of the number.
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| 174 | //
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| 175 | // fMagnitude
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| 176 | // the buffer holding the number.
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| 177 | //
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| 178 | // fRawData
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| 179 | // to preserve the original string used to construct this object,
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| 180 | // needed for pattern matching.
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| 181 | //
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| 182 | // -----------------------------------------------------------------------
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| 183 |
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| 184 | int fSign;
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| 185 | XMLCh* fMagnitude; //null terminated
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| 186 | XMLCh* fRawData;
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| 187 | MemoryManager* fMemoryManager;
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| 188 | };
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| 189 |
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| 190 | inline int XMLBigInteger::getSign() const
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| 191 | {
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| 192 | return fSign;
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| 193 | }
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| 194 |
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| 195 | inline int XMLBigInteger::getTotalDigit() const
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| 196 | {
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| 197 | return ((getSign() ==0) ? 0 : XMLString::stringLen(fMagnitude));
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| 198 | }
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| 199 |
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| 200 | inline bool XMLBigInteger::operator==(const XMLBigInteger& toCompare) const
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| 201 | {
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| 202 | return ( compareValues(this, &toCompare, fMemoryManager) ==0 ? true : false);
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| 203 | }
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| 204 |
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| 205 | inline void XMLBigInteger::setSign(int newSign)
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| 206 | {
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| 207 | fSign = newSign;
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| 208 | }
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| 209 |
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| 210 | inline XMLCh* XMLBigInteger::getRawData() const
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| 211 | {
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| 212 | return fRawData;
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| 213 | }
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| 214 |
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| 215 | //
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| 216 | // The caller needs to de-allocate the memory allocated by this function
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| 217 | //
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| 218 | inline XMLCh* XMLBigInteger::toString() const
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| 219 | {
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| 220 | // Return data using global operator new
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| 221 | return XMLString::replicate(fRawData, fMemoryManager);
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| 222 | }
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| 223 |
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| 224 | XERCES_CPP_NAMESPACE_END
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| 225 |
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| 226 | #endif
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