/// <summary>
/// Will read the very top head of the TPS file.
/// It will also fill in the block info list
/// </summary>
/// <returns></returns>
private bool ReadTPSHeaderInfo()
{
_tpsHeader = new TPSHeader();
_tpsHeader.Process();
//fill in our blocks
_tpsBlocks = new List <TPSBlock>();
long tpsFilelength = RandomAccess.GetInstance().fileSize;
for (int t = 0; t < _tpsHeader.PageStart.Length; t++)
{
int ofs = _tpsHeader.PageStart[t];
int end = _tpsHeader.PageEnd[t];
// Skips the first entry (0 length) and any blocks that are beyond
// the file size.
if (((ofs == 0x0200) && (end == 0x200)) || (ofs >= tpsFilelength))
{
continue;
}
else
{
_tpsBlocks.Add(new TPSBlock(ofs, end));
}
}
return(true);
}
/// <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);
}
public void Open()
{
RandomAccess ra = RandomAccess.GetInstance();
ra.OpenFile(_filename);
_log += "INFO: Opened File: " + _filename;
}
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
}
public override string ToString()
{
RandomAccess ra = RandomAccess.GetInstance();
string str = "";
str += "TpsHeader(" + ra.toHex8(Addr) + "," + ra.toHex4(HeaderSize) + "," + ra.toHex8(FileLength1) + "," + ra.toHex8(FileLength2) + "," + TopSpeed
+ "," + ra.toHex4(Zeros) + "," + ra.toHex8(LastIssuedRow) + "," + ra.toHex8(Changes) + "," + ra.toHex8(ManagementPageRef) + ")\n";
for (int t = 0; t < PageStart.Length; t++)
{
str += ra.toHex8(PageStart[t]) + ".." + ra.toHex8(PageEnd[t]) + "\n";
}
return(str);
}
/// <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();
ra.position = 0;
Addr = ra.leLong();
if (Addr != 0)
{
throw new Exception("File doesn't start with 0x00000000 - it's not a TPS databse");
}
HeaderSize = ra.leShort();
FileLength1 = ra.leLong();
FileLength2 = ra.leLong();
TopSpeed = ra.fixedLengthString(4);
Zeros = ra.leShort();
LastIssuedRow = ra.beLong();
Changes = ra.leLong();
ManagementPageRef = ra.toFileOffset(ra.leLong());
PageStart = ra.toFileOffset(ra.leLongArray((0x110 - 0x20) / 4));
PageEnd = ra.toFileOffset(ra.leLongArray((0x200 - 0x110) / 4));
}
public override string ToString()
{
RandomAccess ra = RandomAccess.GetInstance();
return(string.Format("[TPSPage Addr={0}, PageSize={1}, PageSizeUncompressed={2}, PageSizeUncompressedWithoutHeader={3}, RecordCount={4}, Flags={5}]", ra.toHex8(addr), ra.toHex4(pageSize), ra.toHex4(pageSizeUncompressed), ra.toHex4(pageSizeUncompressedWithoutHeader), ra.toHex4(recordCount), ra.toHex2(flags)));
}
public void Close()
{
RandomAccess.GetInstance().CloseFile();
}