public ABheader(Stream reader)
{
CachedReader = reader;
reader.Position = 0;
byte[] buf = reader.ReadBytes(0x40);
ReaderBE rbr = new ReaderBE(buf);
signature = rbr.rStr();
version = rbr.ru4c();
VerLow = rbr.rStr();
VerUp = rbr.rStr();
size = rbr.ri8c();
compressedBlocksInfoSize = rbr.ri4c();
int uncompressedBlocksInfoSize = rbr.ri4c();
uint flags = rbr.ru4c();
int toBlo = rbr.seek;
ABHsize = toBlo + compressedBlocksInfoSize;
rbr.Clear();
reader.Position = 0;
buf = reader.ReadBytes(ABHsize);
rbr.Reload(buf);
rbr.seek = toBlo;
ReFillrbr(rbr, uncompressedBlocksInfoSize, flags);
if (compressedblocks != null)
{
ABHsize = 0;
Compressed = true;
CachedReader.Close();
//CachedReader = new memreader~
}
if (Files.Length == 2)
{
resSraw = Files[1].Offset;
}
//reader.Position = ABHsize;
//if ram, ABHsize=0;
}
unsafe void ReFillrbr(ReaderBE rbr, int uncompsize, uint flags)
{
byte[] buf;
switch (flags & 0x3F)
{
default: //None
break;
case 1:
buf = new byte[uncompsize];
break;
case 2: //LZ4
case 3: //LZ4HC
buf = new byte[uncompsize];
using (var decoder = new Lz4DecoderStream(new MemoryStream(rbr.Bas, rbr.seek, rbr.Bas.Length - rbr.seek)))
decoder.Read(buf, 0, uncompsize);
rbr.Reload(buf);
break;
}
rbr.seek += 0x10; //uncompressedDataHash
int blocksInfoCount = rbr.ri4c();
CompressedBlocks cb0 = *(CompressedBlocks *)rbr.ReadTc(0);
if (blocksInfoCount == 1 && cb0.compressedSize == cb0.uncompressedSize)
{
}
else
{
compressedblocks = new CompressedBlocks[blocksInfoCount];
fixed(byte *srcbb = &rbr.Bas[rbr.seek])
{
for (int i = 0; i < blocksInfoCount; i++)
{
compressedblocks[i] = *(CompressedBlocks *)(srcbb + 0xA * i);
}
}
}
rbr.seek += blocksInfoCount * 0xA;
blocksInfoCount = rbr.ri4c();
Files = new PackedFiles[blocksInfoCount];
for (int i = 0; i < blocksInfoCount; i++)
{
Files[i] = new PackedFiles
{
Offset = rbr.ru8c(),
Size = rbr.ru8c(),
flags = rbr.ru4c(),
Name = rbr.rStr()
};
}
rbr.Clear();
}
