addressUnixToPosix

fn addressUnixToPosix(a: *const net.UnixAddress, storage: *UnixAddress) posix.socklen_t {
    storage.un.family = posix.AF.UNIX;
    var path_len = switch (native_os) {
        .windows => @min(a.path.len, storage.un.path.len),
        else => a.path.len,
    };
    // With the AFD API, `sockaddr.un` is purely informational, so
    // use a suffix which is usually the most relevant part of a path.
    @memcpy(storage.un.path[0..path_len], a.path[a.path.len - path_len ..]);
    if (storage.un.path.len - path_len > 0) {
        @branchHint(.likely);
        storage.un.path[path_len] = 0;
        path_len += 1;
    }
    switch (native_os) {
        .windows => {
            if (storage.un.path[0] == 0) @memset(storage.un.path[path_len..], 0);
            return @sizeOf(posix.sockaddr.un);
        },
        else => return @intCast(@offsetOf(posix.sockaddr.un, "path") + path_len),
    }
}