IP comparison functions #15
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Initial commit of implementation and tests for ip_compare(), designed for use with Puppet's `sort()` to sort a series of IP addresses into binary-numerical order, regardless of the human-readable representation in which they were originally written.
Initial commit of greater_than, equal_or_greater_than, equal_to, equal_or_less_than, and less_than comparator functions and their unit tests.
greatflyingsteve
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Important realization that made me feel kinda dumb: if you want to handle the case of comparing with-prefix form to no-prefix form, you can't just key your normalization pass off of both values being one or the other. Normalize each value individually, which solves the problem correctly.
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This is based on the work already submitted in #14, and includes another update to the PDK templates (although unfortunately not very much of one, this time). This adds some usefull functions for comparing and equality-testing IP addresses, both with equivalent functions for traditional boolean-return comparisons (
>,>=,==,<=, and<), and for use with functions like Puppet'ssort(), which execute a block and expect one of-1,0, or1as return to indicate whether the left operand is smaller than, equal to, or greater than the right, and will perform arbitrarily elaborate sorts accordingly.My specific need for this was the
sort()case to put a list of IP addresses in sorted order to (hopefully) match the output of a certain popularly-unpopular network management tool, and the others were just simple enough at that point that there wasn't a good reason NOT to include them (or at least, that's what I thought until I started writing docs for all of them, heh).