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From: Renato golin (renato_at_[hidden])
Date: 2008-02-11 16:45:18

Eugene M. Kim wrote:
> I am looking for a way to feed the input bytes only once, in order to
> reduce the time complexity to approximately O(n). Of course I will lose
> the ability to recover submatches, but the ability is unnecessary for
> this particular application that I am considering. I cannot break the
> regex into two parts ("omg" and "wtf") either because it is specified as
> an input to the program.


It may sound silly but what if you pre-process the input splitting it by
".*" and do an AND match for all sub-strings?

input = "omg.*wtf" => input[] = "omg", "wtf";
return (regexp_match(input[0]) && regexp_match(input[1]));


PS: of course the code above is pseudo-code and of course you'll take as
many input parameters as available and not hard-coded like this.

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