"""
Summoner .VPP files unpacker

Written by Dmitry Jemerov in April 2001 and released to the public domain.

Usage: unvpp filename
"""

import sys,struct

def read_long (f):
    buf = f.read (4)
    (result,) = struct.unpack ("l", buf)
    return result

def main():
    if len (sys.argv) < 2:
        print 'Usage: unvpp filename'
        return

    vpp = open (sys.argv [1], "rb")
    vpp.seek (8)
    fileCount = read_long (vpp)

    vpp.seek (0x800)
    files = []
    for fileIndex in xrange (fileCount):
        fileName = vpp.read (60)
        i = 0
        while i < 60 and fileName [i] != chr (0):
            i += 1

        fileName = fileName [0:i]
        fileSize = read_long (vpp)
        files.append ((fileName, fileSize))

    pos = vpp.tell() / 0x800
    vpp.seek ((pos + 1) * 0x800)

    for fileName, fileSize in files:
        print fileName
        data = vpp.read (fileSize)
        out = open (fileName, "wb")
        out.write (data)
        out.close()

        pos = vpp.tell() / 0x800
        vpp.seek ((pos + 1) * 0x800)

    vpp.close()

main()