sackley 2003/11/10 03:53:16
Added: src/scratchpad/src/org/apache/poi/hwpf/sprm
SprmOperation.java
Log:
initial check in
Revision Changes Path
1.1
jakarta-poi/src/scratchpad/src/org/apache/poi/hwpf/sprm/SprmOperation.java
Index: SprmOperation.java
===================================================================
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2003 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 "Apache" and "Apache Software Foundation" and
* "Apache POI" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache",
* "Apache POI", 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. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.poi.hwpf.sprm;
import org.apache.poi.util.BitField;
import org.apache.poi.util.LittleEndian;
/**
* This class is used to represent a sprm operation from a Word 97/2000/XP
* document.
* @author Ryan Ackley
* @version 1.0
*/
public class SprmOperation
{
final static private BitField OP_BITFIELD = new BitField(0x1ff);
final static private BitField SPECIAL_BITFIELD = new BitField(0x200);
final static private BitField TYPE_BITFIELD = new BitField(0x1c00);
final static private BitField SIZECODE_BITFIELD = new BitField(0xe000);
private int _type;
private int _operation;
private int _gOffset;
private byte[] _grpprl;
private int _sizeCode;
public SprmOperation(byte[] grpprl, int offset)
{
_grpprl = grpprl;
short sprmStart = LittleEndian.getShort(grpprl, offset);
_gOffset = offset + 2;
_operation = OP_BITFIELD.getValue(sprmStart);
_type = TYPE_BITFIELD.getValue(sprmStart);
_sizeCode = SIZECODE_BITFIELD.getValue(sprmStart);
}
public int getType()
{
return _type;
}
public int getOperation()
{
return _operation;
}
public int getGrpprlOffset()
{
return _gOffset;
}
public int getOperand()
{
switch (_sizeCode)
{
case 0:
case 1:
return _grpprl[_gOffset];
case 2:
case 4:
case 5:
return LittleEndian.getShort(_grpprl, _gOffset);
case 3:
return LittleEndian.getInt(_grpprl, _gOffset);
case 6:
throw new UnsupportedOperationException("This SPRM contains a variable
length operand");
case 7:
byte threeByteInt[] = new byte[4];
threeByteInt[0] = _grpprl[_gOffset];
threeByteInt[1] = _grpprl[_gOffset + 1];
threeByteInt[2] = _grpprl[_gOffset + 2];
threeByteInt[3] = (byte)0;
return LittleEndian.getInt(threeByteInt, 0);
default:
throw new IllegalArgumentException("SPRM contains an invalid size code");
}
}
public int getSizeCode()
{
return _sizeCode;
}
public int size()
{
switch (_sizeCode)
{
case 0:
case 1:
return 3;
case 2:
case 4:
case 5:
return 4;
case 3:
return 6;
case 6:
return _grpprl[_gOffset] + 3;
case 7:
return 5;
default:
throw new IllegalArgumentException("SPRM contains an invalid size code");
}
}
public byte[] getGrpprl()
{
return _grpprl;
}
}
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