mirror of
https://github.com/noDRM/DeDRM_tools.git
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111 lines
2.2 KiB
Python
111 lines
2.2 KiB
Python
#! /usr/bin/python
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# vim:ts=4:sw=4:softtabstop=4:smarttab:expandtab
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# For use with Topaz Scripts Version 2.0
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from __future__ import with_statement
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import csv
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import sys
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import os
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import getopt
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from struct import pack
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from struct import unpack
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#
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# Get a 7 bit encoded number from string
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#
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def readEncodedNumber(file):
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flag = False
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c = file.read(1)
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if (len(c) == 0):
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return None
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data = ord(c)
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if data == 0xFF:
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flag = True
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c = file.read(1)
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if (len(c) == 0):
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return None
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data = ord(c)
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if data >= 0x80:
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datax = (data & 0x7F)
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while data >= 0x80 :
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c = file.read(1)
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if (len(c) == 0):
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return None
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data = ord(c)
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datax = (datax <<7) + (data & 0x7F)
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data = datax
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if flag:
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data = -data
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return data
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#
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# Encode a number in 7 bit format
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#
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def encodeNumber(number):
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result = ""
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negative = False
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flag = 0
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if number < 0 :
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number = -number + 1
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negative = True
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while True:
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byte = number & 0x7F
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number = number >> 7
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byte += flag
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result += chr(byte)
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flag = 0x80
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if number == 0 : break
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if negative:
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result += chr(0xFF)
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return result[::-1]
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#
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# Get a length prefixed string from the file
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#
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def lengthPrefixString(data):
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return encodeNumber(len(data))+data
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def readString(file):
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stringLength = readEncodedNumber(file)
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if (stringLength == None):
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return None
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sv = file.read(stringLength)
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if (len(sv) != stringLength):
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return ""
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return unpack(str(stringLength)+"s",sv)[0]
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def getMetaArray(metaFile):
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# parse the meta file into a Python dictionary (associative array)
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result = {}
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fo = file(metaFile,'rb')
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size = readEncodedNumber(fo)
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for i in xrange(size):
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temp = readString(fo)
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result[temp] = readString(fo)
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fo.close()
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return result
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def getMetaData(metaFile):
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# parse the meta file
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result = ''
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fo = file(metaFile,'rb')
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size = readEncodedNumber(fo)
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for i in xrange(size):
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result += readString(fo) + '|'
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result += readString(fo) + '\n'
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fo.close()
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return result
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