org.apache.poi.hdf.model.hdftypes.PlexOfCps Maven / Gradle / Ivy
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package org.apache.poi.hdf.model.hdftypes;
/**
* common data structure in a Word file. Contains an array of 4 byte ints in
* the front that relate to an array of abitrary data structures in the back.
*
* This class acts more like a pointer. In the sense that it doesn't store any
* data. It only provides convenience methods for accessing a particular
* PlexOfCps
*
* @author Ryan Ackley
*/
public final class PlexOfCps
{
private int _count;
private int _offset;
private int _sizeOfStruct;
/**
* Constructor
*
* @param size The size in bytes of this PlexOfCps
* @param sizeOfStruct The size of the data structure type stored in
* this PlexOfCps.
*/
public PlexOfCps(int size, int sizeOfStruct)
{
_count = (size - 4)/(4 + sizeOfStruct);
_sizeOfStruct = sizeOfStruct;
}
public int getIntOffset(int index)
{
return index * 4;
}
/**
* returns the number of data structures in this PlexOfCps.
*
* @return The number of data structures in this PlexOfCps
*/
public int length()
{
return _count;
}
/**
* Returns the offset, in bytes, from the beginning if this PlexOfCps to
* the data structure at index.
*
* @param index The index of the data structure.
*
* @return The offset, in bytes, from the beginning if this PlexOfCps to
* the data structure at index.
*/
public int getStructOffset(int index)
{
return (4 * (_count + 1)) + (_sizeOfStruct * index);
}
}