metadata

extract-v2.py

@@ -1,80 +0,0 @@
-#!/usr/bin/env python
-
-# currently only extracts text metadata
-
-import sys
-
-def error(msg):
-    print(msg)
-    sys.exit(1)
-
-def parsestr(data, start):
-    end = start + data[start:].find(b'\0')
-    return end + 1, data[start:end].decode('ascii')
-
-def parsefields(data, pos0):
-    pos1, name = parsestr(data, pos0)
-    pos2, version = parsestr(data, pos1)
-    pos3, author = parsestr(data, pos2)
-    pos4, desc = parsestr(data, pos3)
-    return {'name': name, 'version': version, 'author': author, 'desc': desc}
-
-def parse(data, pos0):
-    if len(data[pos0:]) < 6:
-        raise Exception('not enough data!')
-    a,b,c,d,e,f = data[pos0:pos0+6]
-    if a != 0xa0 or d != 0x80 or f != 0x37:
-        return None
-    else:
-        return (e, b, c)
-
-def toaddr(x, y):
-    return x * 256 + y - 256
-    
-def main():
-    if len(sys.argv[1:]) != 1:
-        print('usage: %s ROMFILE' % sys.argv[0])
-        sys.exit(1)
-
-    f = open(sys.argv[1], 'rb')
-    data = f.read()
-    f.close()
-
-    if len(data) < 6:
-        return error("file too small: %d bytes" % len(data))
-
-    (kind, x, y) = parse(data, 0)
-    if kind != 0xf0:
-        head = ''.join(['%02x' % n for n in data[0:6]])
-        return error("file should start with 'a0____804037' but got %r" % head)
-
-    icon_type = None
-    icon_data = None
-
-    i = 6
-    while True:
-        res = parse(data, i)
-        if res is None:
-            break
-        i += 6
-        kind, x, y = res
-        xy = '%02x%02x' % (x, y)
-        if kind == 0xf2:
-            fields = parsefields(data, toaddr(x, y))
-            print('fields: %r' % fields)
-        elif kind == 0xf4:
-            icon_type = x * 256 - y
-            print('icon type: %s' % xy)
-        elif kind == 0xf6:
-            # TODO: extract icon data as BMP or similar
-            print('icon data at %s' % xy)
-        elif kind == 0xf8:
-            print('maximum memory address is %s' % xy)
-        elif kind == 0xfa:
-            # TODO: parse manifest structure
-            print('manifest data at %s' % xy)
-        else:
-            print('unknown field: %02x (%s)' % (kind, xy))
-
-if __name__ == "__main__":
-    main()