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/*
* 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/>.
*/
/*
* $Log$
* Revision 1.1 2002/02/01 22:22:10 peiyongz
* Initial revision
*
* Revision 1.1 2001/05/16 15:25:38 tng
* Schema: Add Base64 and HexBin. By Pei Yong Zhang.
*
*/
// ---------------------------------------------------------------------------
// Includes
// ---------------------------------------------------------------------------
#include <xercesc/util/HexBin.hpp>
#include <xercesc/util/XMLUniDefs.hpp>
#include <xercesc/util/XMLString.hpp>
// ---------------------------------------------------------------------------
// constants
// ---------------------------------------------------------------------------
static const int BASELENGTH = 255;
// ---------------------------------------------------------------------------
// class data member
// ---------------------------------------------------------------------------
bool HexBin::hexNumberTable[BASELENGTH];
bool HexBin::isInitialized = false;
int HexBin::getDataLength(const XMLCh* const hexData)
{
if (!isArrayByteHex(hexData))
return -1;
return XMLString::stringLen(hexData)/2;
}
bool HexBin::isArrayByteHex(const XMLCh* const hexData)
{
if ( !isInitialized )
init();
if (( hexData == 0 ) || ( *hexData == 0 )) // zero length
return false;
int strLen = XMLString::stringLen(hexData);
if ( strLen%2 != 0 )
return false;
for ( int i = 0; i < strLen; i++ )
if( !isHex(hexData[i]) )
return false;
return true;
}
// -----------------------------------------------------------------------
// Helper methods
// -----------------------------------------------------------------------
bool HexBin::isHex(const XMLCh& octect)
{
// sanity check to avoid out-of-bound index
if (( octect >= BASELENGTH ) || ( octect < 0 ))
return false;
return (hexNumberTable[octect]);
}
void HexBin::init()
{
if ( isInitialized )
return;
int i;
for ( i = 0; i < BASELENGTH; i++ )
hexNumberTable[i] = false;
for ( i = chDigit_9; i >= chDigit_0; i-- )
hexNumberTable[i] = true;
for ( i = chLatin_F; i >= chLatin_A; i-- )
hexNumberTable[i] = true;
for ( i = chLatin_f; i >= chLatin_a; i-- )
hexNumberTable[i] = true;
isInitialized = true;
}