def encode(pos, length, dic, buf, consts):
if length < consts['min']: # not worth encoding, just dump the buffer
bits = [consts['uncoded']]
length = consts['max']
bits.extend(buf[:consts['max']])
else: # encode the buffer as a match
bits = [consts['coded']]
length = min(length, consts['max'])
bits.extend(dic[pos:length])
bitstream.write(bits)
return length
def decompress(dic, consts):
bitstream.start(sys.argv[2], sys.argv[3])
buf = ['filler']
while buf != []:
flag = bitstream.read(1)
if flag == [47]: #unencoded
buf = bitstream.read(consts['max'])
else: # encoded
break
# slide the window
del dic[:len(buf)]
dic.extend(buf)
bitstream.write(buf)
