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Dag-Erling Smørgrav
a689bfa4e2
* Adjust the comment to reflect the fact that SIGBUS can occur not only if the file is truncated, but also if an I/O error occurs while paging in any part of it. * Instead of setting a flag, just return EIO. * Adjust the unit test accordingly. MFC after: 1 week Sponsored by: Klara, Inc. Reviewed by: thj, kevans Differential Revision: https://reviews.freebsd.org/D55108
This is a collection of diff algorithms, to test various combinations. The initial aim was to provide a faster diff implementation for got (gameoftrees.org) with a BSD license, at the u2k20 OpenBSD hackathon. A side effect could be improving OpenBSD's /usr/bin/diff utility. At the time of writing, this is little more than a playground / benchmark basis / diff algorithm analysis platform. What could be done: - add profiling and test series to rate diff algorithm combinations. - interface with / merge into got. The Myers and Patience Diff algorithm implementations found here are based on the explanations found in these blog post series: https://blog.jcoglan.com/2017/02/12/the-myers-diff-algorithm-part-1/ ff. and https://blog.jcoglan.com/2017/09/19/the-patience-diff-algorithm/ ff. -- possibly the single most comprehensive explanations of these algorithms. Many thanks for this valuable door opener! The source code itself is not based on the code found in those blogs, but written from scratch with the knowledge gained. Compile: make -C diff Test: make -C test/