While the below C function does a good job to validate any combination of URL/FQDN but it fails to validate IPv4 addresses and Shorthand notation of IPv6 and certain other IPv6 format addresses.While the below C function does a good job to v
阅读背景：
使用可以验证URL、IPv4地址、IPv6地址和FQDN的正则表达式编写C函数。
来源：互联网
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