internal STFSDescriptor(byte[] xDescriptor, uint xTotalBlocks, uint xOldBlocks, byte xType)
{
xStruct = xDescriptor;
XSetStructure((STFSType)(xType & 1));
TopRecord = new BlockRecord(((uint)(xType >> 1) << 30 | xOldBlocks << 15));
if (xTotalBlocks > SpaceBetween[2])
{
xStruct = null;
return;
}
xBlockCount = xTotalBlocks;
xBaseByte = (byte)((ThisType == STFSType.Type0) ? 0xB : 0xA);
}
internal STFSDescriptor(STFSPackage xPackage)
{
xPackage.xIO.Position = 0x340;
xPackage.xIO.IsBigEndian = true;
var xBlockInfo = xPackage.xIO.ReadInt32();
xBaseByte = (byte)(((xBlockInfo + 0xFFF) & 0xF000) >> 0xC);
xPackage.xIO.Position = 0x379;
if (xPackage.xIO.ReadByte() != 0x24) // Struct Size
{
throw STFSExcepts.Type;
}
if (xPackage.xIO.ReadByte() != 0) // Reversed
{
throw STFSExcepts.Type;
}
/* STRUCT OF THE NEXT 6 BYTES:
* byte for block separation
* Little Endian File Table block count short (2 bytes)
* 3 bytes in Little Endian for the starting block of the File Table */
var idx = (byte)(xPackage.xIO.ReadByte() & 3);
xStruct = xPackage.xIO.ReadBytes(5);
xPackage.xIO.Position = 0x395;
xBlockCount = xPackage.xIO.ReadUInt32();
var xOldBlocks = xPackage.xIO.ReadUInt32();
// Checks the type of Structure
switch (xBaseByte)
{
case 0xB:
if (idx == 1)
{
XSetStructure(STFSType.Type0);
}
else
{
throw STFSExcepts.Type;
}
break;
case 0xA:
if (idx == 0 || idx == 2)
{
XSetStructure(STFSType.Type1);
}
else
{
throw STFSExcepts.Type;
}
break;
default:
throw STFSExcepts.Type;
}
if (xBlockCount > SpaceBetween[2])
{
throw STFSExcepts.MaxOver;
}
TopRecord = new BlockRecord(((uint)((idx >> 1) & 1) << 30 | xOldBlocks << 15));
// Grab Real Block Count
for (var i = (xBlockCount - 1); ; i--)
{
xBlockCount = (i + 1);
if (GenerateDataOffset(i) < xPackage.xIO.Length)
{
break;
}
}
}