/
decomp.py
61 lines (49 loc) · 1.39 KB
/
decomp.py
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# Embedded file name: decomp.pyc
import sys
from struct import unpack
import os
class Stream:
def __init__(self, string):
self.string = string
def read(self, n):
s = self.string[:n]
self.string = self.string[n:]
return s
def empty(self):
return self.string == ''
def decomp_file(f):
header = unpack('<I', f.read(4))[0]
length = header >> 8
firstbyte = header & 255
if firstbyte != 16:
print 'First byte error, note lzss encoded'
raise IndexError
decomp = ''
while length > 0:
d = ord(f.read(1))
for i in range(8):
if d & 128:
r = map(ord, f.read(2))
offset = ((r[0] & 15) << 8) + r[1]
nlength = (r[0] >> 4) + 3
start = len(decomp) - offset - 1
for k in range(nlength):
decomp += decomp[start + k]
length -= 1
if length == 0:
break
else:
decomp = decomp + f.read(1)
length -= 1
d = d << 1
if length == 0:
break
return decomp
def decomp_string(string):
return decomp_file(Stream(string))
if __name__ == '__main__':
f = file(sys.argv[1], 'rb')
fo = file(sys.argv[2], 'wb')
fo.write(decomp_file(f))
fo.close()
f.close()