#!/usr/bin/env python3
"""Dump dis34 lines for a BYTE-offset range.

The cached disassembly (reference/dis34-a-v22.txt.gz) prints *bit* addresses:
displayed = byte_offset * 8.  We accept byte offsets and convert.

Usage: dd.py START_OFF END_OFF [--hex]
  START_OFF/END_OFF may be decimal or 0x-prefixed.
"""
import gzip, re, sys

PATH = "reference/dis34-a-v22.txt.gz"


def main():
    start = int(sys.argv[1], 0)
    end = int(sys.argv[2], 0)
    with gzip.open(PATH, "rt", errors="replace") as f:
        out = []
        for line in f:
            m = re.match(r"^([0-9a-fA-F]{6,8}):", line)
            if m:
                a = int(m.group(1), 16)
                byte = a >> 3
                if start <= byte < end:
                    out.append(line.rstrip("\n"))
        print("\n".join(out))


if __name__ == "__main__":
    main()