Well, your file is fairly large and may or may not fit in memory. If it does fit, then a regex allowing newlines and using the g modifier will do, as shown by other monks.

If it does not fit in memory, then you probably have to bite the bullet and use strange buffers and things like that, but don't be too afraid of that, these "strange things", such as a sliding window, do not need to be very complicated and can be implemented in just 3 or 4 lines of code.

In reply to Re: Regexp matching on a multiline file: dealing with line breaks by Laurent_R
in thread Regexp matching on a multiline file: dealing with line breaks by BlueStarry

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