mzm/tools/extractor.py

from array import array
from io import BufferedReader
import shutil
import os

DATA_PATH = "data/"
subDirs: array = [
    "sprites/",
    "hud/",
    "weapons/",
    "common/"
]

try:
    shutil.rmtree(DATA_PATH, ignore_errors=False, onerror=None)
except:
    pass

# Create directories
os.mkdir(DATA_PATH)
for dir in subDirs:
    os.mkdir(DATA_PATH.__add__(dir))


rom: BufferedReader = open("mzm_us_baserom.gba", "rb")
db: BufferedReader = open("database.txt", "r")

line: str = db.readline()
while line != '':
    # Formatted as follows : name;length;address;size
    # The symbol # can be used as the first character of a line to make the extractor ignore it
    if line[0] != '\n' and line[0] != '#':
        info: array = line.split(";")

        name: str = info[0]
        print("Extracting", name)
        rom.seek(int(info[2], 16))

        size: int = int(info[3])
        output: BufferedReader = open(DATA_PATH.__add__(name), "ab")
        for x in range(0, int(info[1])):
            output.write(int.from_bytes(rom.read(size), "little").to_bytes(size, "little"))

        output.close()
    line = db.readline()

rom.close()