"""exports2def.py — 把 dumpbin /exports 的输出转成 .def（给 lib.exe 生成导入库用）。

用法: python exports2def.py <exports.txt> <out.def> <LIBRARY名>
"""
import re
import sys

def main():
    src, dst, libname = sys.argv[1], sys.argv[2], sys.argv[3]
    names = set()
    pat = re.compile(r"^\s+\d+\s+[0-9A-Fa-f]+\s+[0-9A-Fa-f]+\s+(\S+)")
    with open(src, encoding="utf-8", errors="ignore") as f:
        for line in f:
            m = pat.match(line)
            if m:
                names.add(m.group(1))
    if not names:
        print("exports2def: 没解析出任何导出名", file=sys.stderr)
        return 1
    with open(dst, "w", encoding="ascii", newline="\r\n") as f:
        f.write(f"LIBRARY {libname}\nEXPORTS\n")
        for n in sorted(names):
            f.write(n + "\n")
    print(f"exports2def: {len(names)} 个导出 → {dst}")
    return 0

if __name__ == "__main__":
    sys.exit(main())