def decompress(compf, f):
"""
Decompress a file.
"""
# read alphabet
alphabet = cPickle.load(compf)
print "alphabet:\n%r" % alphabet
count = 0
while True:
header = compf.read(8)
if header == '':
break
print "block %r:" % count
nbits, I = struct.unpack('>2I', header)
freqs = load_freqs(compf)
#print freqs
nbyte = (nbits+7) / 8
huff_encode = to01(compf.read(nbyte))[:nbits]
#print "huff_encode:\n%r" % huff_encode
coding, root = huff.generate_coding(freqs)
#print "coding:\n%r" % coding
huff_decode = huff.decode(huff_encode, root)
mtf_decode = mtf.decode(alphabet, huff_decode)
bwt_decode = bwt.decode(mtf_decode, I, reverse = True)
content = ''.join(bwt_decode)
f.write(content)
print "nbits = %r, I = %r, length = %r" % (nbits, I, len(content))
count = count + 1
def test_mix(self):
seq = generator(16*1024)
encode, I = bwt.encode(seq)
decode = bwt.decode(encode, I, True)
self.assertEqual(list(seq), decode)
def test_decode(self):
seq = 'caraab'
decode = bwt.decode(seq, 1, True)
self.assertEqual(list('abraca'), decode)