import struct, sys

PATH = "/Users/jing/Documents/yutong/test files/EXPRESS 1.td5"

def load():
    return open(PATH, 'rb').read()

def records(d=None):
    if d is None: d = load()
    out = []
    off = 0x200
    ptrs = []
    while True:
        p = struct.unpack_from('<I', d, off)[0]
        off += 4
        if p == 0xffffffff: break
        ptrs.append(p)
    for p in ptrs:
        name = d[p:p+0x10].decode('latin1').rstrip()
        name2 = d[p+0x10:p+0x20].decode('latin1').rstrip()
        blkoff, blklen = struct.unpack_from('<II', d, p+0x30)
        blk = d[blkoff:blkoff+blklen]
        field = struct.unpack_from('<I', blk, 1)[0]
        out.append(dict(ptr=p, name=name, name2=name2, blkoff=blkoff, blklen=blklen, blk=blk, field=field))
    return out

if __name__ == '__main__':
    d = load()
    rs = records(d)
    print(len(rs), 'records')
    for r in rs:
        print("%-18s ptr=%06x blkoff=%06x blklen=%04x field=%08x" % (
            r['name'], r['ptr'], r['blkoff'], r['blklen'], r['field']))