条件否定先行

Question

使用正则表达式匹配字符串([0-99]% loss)，即内部数字在0和99之间。但是，如果文本包含特殊的codeword，则即使％<100，也不应存在匹配项。

例如，这个应该匹配：✓

Packets: Sent = 4, Received = 4, Lost = 0 (0% loss)
Packets: Sent = 100, Received = 1, Lost = 99 (99% loss)

但不是这四个：✗

Test of codeword string:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss)

Another codeword test:
Packets: Sent = 4, Received = 2, Lost = 2 (50% loss)

Final test:
Packets: Sent = 70, Received = 0, Lost = 70 (100% loss)

Packets: Sent = 4, Received = 4, Lost = 0 (0% loss)
Packets: Sent = 100, Received = 0, Lost = 100 (100% loss)

当前，我已经编写了正则表达式\((?!100)\d+% loss\)来捕获所需的不包含codeword的字符串，但是无法扩展正则表达式以使其阻塞codeword（如果存在） 。我正在考虑某种形式的条件否定超前（例如(?!codeword)|\((?!100)\d+% loss\)？），但是看起来如何？