private static byte[] extractFiles(FileStream fs, ARCFilePart[] parts, Record record)
{
byte[] data = new byte[record.len_decomp];
// strings[i] is filename
// tocs[i] is ToC, references parts
// bytes is references by parts
//@tocs[i].data = new byte[tocs[i].len_decomp];
int offDecomp = 0;
for (int j = 0; j < record.num_parts; j = j + 1)
{
ARCFilePart part = parts[record.index + j];
if (part.len_comp == part.len_decomp)
{
// The file part is not compressed
byte[] bComp = new byte[part.len_comp];
// fs, offset, dest, 0, len
fs.Seek(part.offset, SeekOrigin.Begin);
fs.Read(bComp, 0, part.len_comp);
for (int k = 0; k < bComp.Length; k = k + 1)
{
data[k + offDecomp] = bComp[k];
}
}
else
{
byte[] bComp = new byte[part.len_comp];
fs.Seek(part.offset, SeekOrigin.Begin);
fs.Read(bComp, 0, part.len_comp);
byte[] tmp = LZ4.LZ4Codec.Decode(bComp, 0, bComp.Length, part.len_decomp);
Array.Copy(tmp, 0, data, offDecomp, part.len_decomp);
}
offDecomp = offDecomp + part.len_decomp;
}
return(data);
}
private ARCFilePart[] getFileParts(FileStream fs)
{
ARCFilePart[] parts = new ARCFilePart[header.rec_num];
int offset = header.rec_offset;
fs.Seek(offset, SeekOrigin.Begin);
for (int i = 0; i < header.rec_num; i = i + 1)
{
ARCFilePart part = new ARCFilePart();
part.offset = IOHelper.ReadInteger(fs);
part.len_comp = IOHelper.ReadInteger(fs);
part.len_decomp = IOHelper.ReadInteger(fs);
parts[i] = part;
}
return(parts);
}
private ARCFilePart[] getFileParts(byte[] bytes)
{
ARCFilePart[] parts = new ARCFilePart[header.rec_num];
int offset = header.rec_offset;
for (int i = 0; i < header.rec_num; i = i + 1)
{
ARCFilePart part = new ARCFilePart();
part.offset = IOHelper.GetInt(bytes, offset);
offset = offset + 4;
part.len_comp = IOHelper.GetInt(bytes, offset);
offset = offset + 4;
part.len_decomp = IOHelper.GetInt(bytes, offset);
offset = offset + 4;
parts[i] = part;
}
return(parts);
}
