| #!/usr/bin/python |
| |
| from __future__ import division |
| |
| import sys, os, struct |
| |
| def getTreeStream(path): |
| data = open(path,'rb').read() |
| paths = { 0 : ''} |
| pos = 0 |
| while pos<len(data): |
| id,tag = struct.unpack('II', data[pos:pos+8]) |
| pos += 8 |
| if tag&(1<<31): |
| child = tag ^ (1<<31) |
| paths[child] = paths[id] |
| else: |
| size = tag |
| paths[id] += data[pos:pos+size] |
| pos += size |
| if pos!=len(data): |
| raise IOError,'bad position' |
| return paths |
| |
| def writeTreeStream(path, output): |
| paths = getTreeSTream(path) |
| print 'Writing %d paths'%len(paths) |
| for i,data in paths.items(): |
| if i!=0: |
| f = open('%s%04d'%(output,i), 'wb') |
| f.write(data) |
| f.close() |
| |
| def main(args): |
| from optparse import OptionParser |
| op = OptionParser("usage: %prog input outputPrefix") |
| opts,args = op.parse_args() |
| |
| input,outputPrefix = args |
| |
| f = open(input,'rb') |
| data = f.read() |
| f.close() |
| writeTreeStream(data, outputPrefix) |
| |
| if __name__=='__main__': |
| main(sys.argv) |
| |
