#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""检查 C/C++ 源码中是否含 U+FFFD 替换符（编码损坏标志，不可逆），含则退出码 1。"""
import sys

BAD = b"\xef\xbf\xbd"
bad_files = []
for path in sys.argv[1:]:
    with open(path, "rb") as f:
        if BAD in f.read():
            bad_files.append(path)
if bad_files:
    print("U+FFFD replacement chars found (encoding corrupted, irreversible!):")
    for p in bad_files:
        print("  -", p)
    sys.exit(1)