Re: [Boost-users] Regular expression min match length

From: Raffaele Romito (berserker_r_at_[hidden])
Date: 2007-08-13 05:58:16

Thanks for the reply John, I'll try to expose my "use case" with the hope this feature will be available in the future...
I'm developing a system that detects TCP streams with a pattern matching, here is the pseudo code  (in a simplified form) of the function I'd link to extend:
 
protocol_stream decodeStream(tcp_stream)
{
    foreach(registered protocol in the system)
    {
        required_size_to_match = calc_min_regex_len(current_protocol.regex);
 
        if(tcp_stream.buffer_size <= required_size_to_match)
            check if tcp_stream.buffer matches
        else
            try to read from tcp_stream if data is available until <required_size_to_match> and check again if matches
    }
}
 
Hope u can help since you have "an almost pathological interest in anything that can't be done" :)
Thanks again
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