public SinHashBlock(byte[] hashblock, int index) {
this.spare = spare;
byte[] offset = new byte[4];
byte[] length = new byte[4];
System.arraycopy(hashblock, 0, offset, 0, 4);
System.arraycopy(hashblock, 4, length, 0, 4);
boffset = BytesUtil.getLong(offset);
blength = BytesUtil.getInt(length);
hashsize = hashblock[8];
blockindex = index;
}
