The C implementation of the Myers' Diff Algorithm with Linear Space Refinement was originally written by Michael B. Allen with the following license and copyright: diff - compute a shortest edit script (SES) given two sequences Copyright (C) 2004 Michael B. Allen License: MIT The original source code is available at: http://www.ioplex.com/~miallen/libmba/dl/libmba-0.9.1.tar.gz The adapted and heavily modified code is available in src/diff.c, src/diff.h. See those files for additional details. This package is released under the GPL (>= 2) or greater license: diffobj - Compare R Objects with a Diff Copyright (C) 2021 Brodie Gaslam License: GPL (>= 2)