mtime=

/*
 * ???
 */
static VALUE
rb_gzfile_set_mtime(obj, mtime)
    VALUE obj, mtime;
{
    struct gzfile *gz = get_gzfile(obj);
    VALUE val;

    if (gz->z.flags & GZFILE_FLAG_HEADER_FINISHED) {
        rb_raise(cGzError, "header is already written");
    }

    if (FIXNUM_P(mtime)) {
        gz->mtime = FIX2INT(mtime);
    }
    else {
        val = rb_Integer(mtime);
        gz->mtime = FIXNUM_P(val) ? FIX2INT(val) : rb_big2ulong(val);
    }
    return mtime;
}