deltarune_console_to_pc_save.py

# doesn't parse correctly yet
# example save: https://s3.aly.pet/deltarune.sav
import struct

def shift(lst, n, parse=False):
  out = []
  for _ in range(0,n):
    out.append(lst.pop(0))
  if parse:
    return [int(_,16) for _ in out]
  return out

def parse_ds_list(inp):
  inp = inp.replace(" ","") # TODO
  from textwrap import wrap
  _bytes = wrap(inp,2)
  magic = shift(_bytes,4)
  list_length = shift(_bytes,4,True)[0]
  out = []
  while len(_bytes) != 0:
    _type = shift(_bytes,4,True)[0]
    if _type == 1: # string
      str_elem_len = shift(_bytes,4,True)[0]
      element = "".join(chr(_) for _ in shift(_bytes,str_elem_len,True))
    if _type == 0: # double?
      element = str(int(struct.unpack("<d", bytes(shift(_bytes,8,True)))[0]))
    out.append(element)
  return out

def parse_save(data):
  for line in data.split("\n"):
    line = line.strip()
    if line[:8] == "2F010000":
      line = "\n".join(parse_ds_list(line))
    yield line

def create_zip(filename, data):
  import zipfile, io
  buffer = io.BytesIO()
  with zipfile.ZipFile(buffer, "a", zipfile.ZIP_DEFLATED, False) as zip_file:
    for fn,contents in data.items():
      contents = io.BytesIO(contents.encode("utf-8"))
      zip_file.writestr(fn,contents.getvalue())
  with open(filename,"wb") as f:
    f.write(buffer.getvalue())

def main():
  from json import loads
  from argparse import ArgumentParser
  parser = ArgumentParser()
  parser.add_argument("-i", help="input filename (defaults to deltarune.sav)", default="deltarune.sav")
  parser.add_argument("-o", help="output filename (defaults to deltarune.sav.zip)", default="deltarune.sav.zip")
  args = parser.parse_args()
  out = {}
  with open(args.i) as f:
    data = loads(f.read().replace("\x00","").replace("\r\n","\n"))
    for fn,contents in data.items():
      contents = "\n".join(line for line in parse_save(contents))
      out[fn] = contents
  create_zip(args.o, out)

if __name__ == "__main__":
    main()