First disaster rebuild

import os
import sys

#Constants taken from insani tools.
LITTLE_ENDIAN = 1
BIG_ENDIAN = -1

BYTE_LENGTH = 1
SHORT_LENGTH = 2
INT_LENGTH = 4
LONG_LENGTH = 8

ERROR_NONE = 0
ERROR_WARNING = 1
ERROR_ABORT = 2


def converttoint(bytes, size=INT_LENGTH, endian=LITTLE_ENDIAN):
    result = 0
    for i in xrange(size):
        temp=long(ord(bytes[i]))
        if endian == LITTLE_ENDIAN :
            result |= (temp << (8*i))
        elif endian == BIG_ENDIAN :
            result = (result << 8) | temp
        else :
                raise Exception('converttoint: Unknown endian specification')

        return result

def convertfromint(value, size=INT_LENGTH, endian=LITTLE_ENDIAN):
    result = ""
    for i in xrange(size):
        if endian == LITTLE_ENDIAN :
            #result |= (temp << (8*i))
            temp = (value >> (8*i)) & 0x00FF
        elif endian == BIG_ENDIAN :
            #result = (result << 8) | temp
            temp = (value >> (8*(size-i-1))) & 0x00FF
        else :
                raise Exception('convertfromint: Unknown endian specification')
            result += chr(temp)

        return result


#===========================================

files = sys.argv[1:]
for filename in files:
    crc = None

    if (not os.path.isdir(filename)):
        print filename, 'is not a directory.'
        continue

    entries = []
    indexsize = 4
    for (root, dirs, dirfiles) in os.walk(filename):
        #first = dirfiles.pop(0)
        #dirfiles.append(first)

        for name in dirfiles:
            entry = {}

            #fuck. someimes need dir.....
            entry['filename'] = os.path.join(root, name)
            #entry['name'] = name[4:]       #If using forced order
            entry['name'] = entry['filename'][len(filename)+1:].replace('\\', '/')
            stat = os.stat(entry['filename'])
            entry['size'] = stat.st_size
            entries.append(entry)

            indexsize += 12     #namelen, start, size
            indexsize += len(entry['name']) + 1 #filename

    #filecount = convertfromint(len(entries))

    print 'size', indexsize

    outfile = open(filename + '.dat', 'wb')
    outfile.write(convertfromint(indexsize))

    filestart = indexsize
    for entry in entries:
        outfile.write(convertfromint(len(entry['name']) + 1))
        outfile.write(entry['name'])
        outfile.write('\0')

        filesize = entry['size']
        outfile.write(convertfromint(filesize))
        outfile.write(convertfromint(filestart))


        #write file data
        position = outfile.tell()

        outfile.seek(filestart)
        infile = open(entry['filename'], 'rb')
        data = infile.read()
        infile.close()
        outfile.write(data)

        #Go back to the index
        outfile.seek(position)

        print 'Adding', entry['name'], 'with size', entry['size'], 'to position', filestart

        #update filestart for the next file
        filestart += filesize