/*
* 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/>.
*/
/*
* $Id$
* $Log$
* Revision 1.4 2002/05/03 16:05:45 peiyongz
* Bug 7341: Missing newline at end of util and DOM source files,
* patch from Martin Kalen.
*
* Revision 1.3 2002/03/06 19:13:12 peiyongz
* Patch: more valid lexcial representation for positive/negative zero
*
* Revision 1.2 2002/03/01 18:47:37 peiyongz
* fix: more valid lexcial representation forms for "neural zero"
*
* Revision 1.1.1.1 2002/02/01 22:22:14 peiyongz
* sane_include
*
* Revision 1.2 2001/11/22 21:39:00 peiyongz
* Allow "0.0" to be a valid lexcial representation of ZERO.
*
* Revision 1.1 2001/11/19 21:33:42 peiyongz
* Reorganization: Double/Float
*
*
*/
// ---------------------------------------------------------------------------
// Includes
// ---------------------------------------------------------------------------
#include <xercesc/util/XMLAbstractDoubleFloat.hpp>
#include <xercesc/util/XMLUniDefs.hpp>
#include <xercesc/util/NumberFormatException.hpp>
#include <xercesc/util/Janitor.hpp>
// ---------------------------------------------------------------------------
// local data member
// ---------------------------------------------------------------------------
static const int BUF_LEN = 64;
static XMLCh value1[BUF_LEN+1];
// ---------------------------------------------------------------------------
// ctor/dtor
// ---------------------------------------------------------------------------
XMLAbstractDoubleFloat::XMLAbstractDoubleFloat()
:fMantissa(0)
,fExponent(0)
,fType(Normal)
{
}
XMLAbstractDoubleFloat::~XMLAbstractDoubleFloat()
{
if (fMantissa)
delete fMantissa;
if (fExponent)
delete fExponent;
}
void XMLAbstractDoubleFloat::init(const XMLCh* const strValue)
{
if ((!strValue) || (!*strValue))
ThrowXML(NumberFormatException, XMLExcepts::XMLNUM_emptyString);
XMLCh* tmpStrValue = XMLString::replicate(strValue);
ArrayJanitor<XMLCh> janTmpName(tmpStrValue);
XMLString::trim(tmpStrValue);
normalizeZero(tmpStrValue);
if (XMLString::compareString(tmpStrValue, XMLUni::fgNegINFString) == 0)
{
fType = NegINF;
return;
}
else if (XMLString::compareString(tmpStrValue, XMLUni::fgNegZeroString) == 0)
{
fType = NegZero;
return;
}
else if (XMLString::compareString(tmpStrValue, XMLUni::fgPosZeroString) == 0)
{
fType = PosZero;
return;
}
else if (XMLString::compareString(tmpStrValue, XMLUni::fgPosINFString) == 0)
{
fType = PosINF;
return;
}
else if (XMLString::compareString(tmpStrValue, XMLUni::fgNaNString) == 0)
{
fType = NaN;
return;
}
//
// Normal case
//
int ePos = 0;
int tmpStrLen = XMLString::stringLen(tmpStrValue);
if ((( ePos = XMLString::indexOf(tmpStrValue, chLatin_E)) != -1 ) ||
(( ePos = XMLString::indexOf(tmpStrValue, chLatin_e)) != -1 ) )
{
XMLCh* tmpMantissa = new XMLCh [ePos+1];
XMLString::subString(tmpMantissa, tmpStrValue, 0, ePos);
ArrayJanitor<XMLCh> janMantissa(tmpMantissa);
fMantissa = new XMLBigDecimal(tmpMantissa);
//
// 1234.56E78
//
if ( ePos < tmpStrLen - 1)
{
XMLCh* tmpExponent = new XMLCh [tmpStrLen - ePos];
XMLString::subString(tmpExponent, tmpStrValue, ePos + 1, tmpStrLen);
ArrayJanitor<XMLCh> janExponent(tmpExponent);
fExponent = new XMLBigInteger(tmpExponent);
}
//
// 1234.56E
//
else
{
ThrowXML1(NumberFormatException
, XMLExcepts::XMLNUM_DBL_FLT_No_Exponent
, strValue);
}
}
else
{
fMantissa = new XMLBigDecimal(tmpStrValue);
fExponent = new XMLBigInteger(XMLUni::fgZeroString);
}
checkBoundary(tmpStrValue);
}
//
// Add the 'E' as necessary
// The caller needs to de-allocate the memory allocated by this function
// Deallocate the memory allocated by XMLBigInteger
//
XMLCh* XMLAbstractDoubleFloat::toString() const
{
switch (fType)
{
case NegINF:
return XMLString::replicate(XMLUni::fgNegINFString);
case NegZero:
return XMLString::replicate(XMLUni::fgNegZeroString);
case PosZero:
return XMLString::replicate(XMLUni::fgPosZeroString);
case PosINF:
return XMLString::replicate(XMLUni::fgPosINFString);
case NaN:
return XMLString::replicate(XMLUni::fgNaNString);
case Normal:
XMLCh *ret_mantissa;
ret_mantissa = fMantissa->toString();
if (fExponent)
{
XMLCh *ret_exponent = fExponent->toString();
XMLCh *ret_val = new XMLCh [ XMLString::stringLen(ret_mantissa) +
XMLString::stringLen(ret_exponent) + 2];
*ret_val = 0;
XMLString::catString(ret_val, ret_mantissa);
XMLString::catString(ret_val, XMLUni::fgEString);
XMLString::catString(ret_val, ret_exponent);
delete [] ret_mantissa;
delete [] ret_exponent;
return ret_val;
}
else
return ret_mantissa;
break;
default:
XMLString::binToText(fType, value1, 16, 10);
ThrowXML1(NumberFormatException
, XMLExcepts::XMLNUM_DBL_FLT_InvalidType
, value1);
};
return (XMLCh*) 0;
}
int XMLAbstractDoubleFloat::getSign() const
{
return fMantissa->getSign();
}
//
//
//
int XMLAbstractDoubleFloat::compareValues(const XMLAbstractDoubleFloat* const lValue
, const XMLAbstractDoubleFloat* const rValue)
{
//
// case#1: lValue normal
// rValue normal
//
if ((!lValue->isSpecialValue()) &&
(!rValue->isSpecialValue()) )
{
//
// if we use fValue to compare two
// sequences "12.3456E4" and "1234.56E2",
// they are _NOT_ the same. so we ask
// BigDecimal to compare.
//
XMLBigDecimal ldv = XMLBigDecimal(*(lValue->fMantissa), lValue->fExponent->intValue());
XMLBigDecimal rdv = XMLBigDecimal(*(rValue->fMantissa), rValue->fExponent->intValue());
return XMLBigDecimal::compareValues(&ldv, &rdv);
}
//
// case#2: lValue special
// rValue special
//
else
if ((lValue->isSpecialValue()) &&
(rValue->isSpecialValue()) )
{
if (lValue->fType == rValue->fType)
return 0;
else
return (lValue->fType > rValue->fType ? 1 : -1);
}
//
// case#3: lValue special
// rValue normal
//
else
if ((lValue->isSpecialValue()) &&
(!rValue->isSpecialValue()) )
{
return compareSpecial(lValue, rValue);
}
//
// case#4: lValue normal
// rValue special
//
else
{
return (-1) * compareSpecial(rValue, lValue);
}
return 0;
}
int XMLAbstractDoubleFloat::compareSpecial(const XMLAbstractDoubleFloat* const specialValue
, const XMLAbstractDoubleFloat* const normalValue)
{
switch (specialValue->fType)
{
case NegINF:
return -1;
case NegZero:
case PosZero:
return (normalValue->getSign() > 0 ? -1 : 1);
case PosINF:
return 1;
case NaN:
return 1;
default:
XMLString::binToText(specialValue->fType, value1, 16, 10);
ThrowXML1(NumberFormatException
, XMLExcepts::XMLNUM_DBL_FLT_InvalidType
, value1);
//internal error
return 0;
}
}
//
// Assumption: no leading space
//
// 1. The valid char set is "+-.0"
// 2. There shall be only one sign at the first position, if there is one.
// 3. There shall be only one dot '.', if there is one.
//
// Return:
//
// for input comforming to [+]? [0]* '.'? [0]*,
// normalize the input to positive zero string
// for input comforming to '-' [0]* '.'? [0]*,
// normalize the input to negative zero string
// otherwise, do nothing
//
void XMLAbstractDoubleFloat::normalizeZero(XMLCh* const inData)
{
// do a quick check
if (!inData ||
!*inData ||
(XMLString::compareString(inData, XMLUni::fgNegZeroString) == 0) ||
(XMLString::compareString(inData, XMLUni::fgPosZeroString) == 0) )
return;
XMLCh* srcStr = inData;
bool minusSeen = false;
// process sign if any
if (*srcStr == chDash)
{
minusSeen = true;
srcStr++;
}
else if (*srcStr == chPlus)
{
srcStr++;
}
// scan the string
bool dotSeen = false;
bool isValidStr = true;
XMLCh theChar;
while ((theChar=*srcStr++) && isValidStr)
{
if ( theChar != chPeriod && theChar != chDigit_0 )
isValidStr = false; // invalid char
else if (theChar == chPeriod) // process dot
dotSeen ? isValidStr = false : dotSeen = true;
}
// need not to worry about the memory problem
// since either fgNegZeroString or fgPosZeroString
// is the canonical form (meaning the shortest in length)
// of their category respectively.
if (isValidStr)
{
if (minusSeen)
XMLString::copyString(inData, XMLUni::fgNegZeroString);
else
XMLString::copyString(inData, XMLUni::fgPosZeroString);
}
return;
}