/// <summary>
/// Gets data from the page
/// If the page is compressed, it will uncompress it and return it.
/// </summary>
/// <returns></returns>
private byte[] GetData()
{
//set our Randomaccess to the start of this page
RandomAccess ra = RandomAccess.GetInstance();
byte[] pageData;
ra.jumpAbs(addr);
ra.jumpRelative(13); //skip the header
//pull the page data
//This really shouldn't be very big.. on my files it was about 8kb
//If the file is using compression... uncompress it
if ((pageSize != pageSizeUncompressed) && (flags == 0))
{
try {
pageData = ra.deRle(pageSize - 13);
} catch (Exception ex) {
throw new Exception("Bad RLE DataBlock ( compressed: " + pageSize + " uncompressed: " + pageSizeUncompressed + " Page Address: " + addr + "Record Count: " + recordCount.ToString() + "): ", ex);
}
}
else
{
pageData = ra.leBytes(pageSize - 13);
}
return(pageData);
}
/// <summary>
/// Will return a list of all pages in the block
/// </summary>
/// <returns></returns>
public List <TPSPage> getPages()
{
RandomAccess ra = RandomAccess.GetInstance();
List <TPSPage> pages = new List <TPSPage>();
ra.jumpAbs(_start); //jump to the start of the block
try{
while (ra.position < _end) //while we have not fallen off the end of the file
{
TPSPage page = new TPSPage();
page.Process();
pages.Add(page);
//pages always start on the position % 100 = 0
//So let's jump forward to find the next start
if ((ra.position & 0xFF) != 0x00)
{
ra.jumpAbs((ra.position & 0xFFFFFF00L) + 0x0100);
}
//we can find the next page because the address of the page will be in the data
int addr = 0;
if (!ra.isAtEnd())
{
do
{
addr = ra.leLong();
ra.jumpRelative(-4); //backup 4 bytes
if (addr != ra.position)
{
ra.jumpRelative(0x0100);
}
}while ((addr != ra.position) && !ra.isAtEnd());
}
}
}catch (Exception ex) {
;
}
return(pages);
}
public void Process()
{
RandomAccess ra = RandomAccess.GetInstance();
addr = ra.leLong();
pageSize = ra.leShort();
pageSizeUncompressed = ra.leShort();
pageSizeUncompressedWithoutHeader = ra.leShort();
recordCount = ra.leShort();
flags = (int)ra.leByte();
ra.jumpRelative(pageSize - 13); //burn these bytes. This will leave the RandomAccess at the very end of the page
}