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Changelog

Source: NEWS.md

diffmatchpatch 0.2.1

  • Fixed undefined behavior (left shift of negative values) in the Bitap matching code reported by CRAN’s clang-UBSAN checks. The bit masks are now unsigned; results are unchanged.

diffmatchpatch 0.2.0

CRAN release: 2026-11-13

  • Updated diff_match_patch.h with the upstream fix for a buffer overflow in line mode diffs when there are more than 127 unique lines, which could crash R (leutloff/diff-match-patch-cpp-stl#19).

  • Fixed incorrect line mode diffs when there are more than 255 unique lines. The number of line codes is now capped and any remaining text is treated as a single line, following the approach used by the other diff-match-patch implementations.

  • Added a testthat test suite, with cases ported from the upstream test harness.

diffmatchpatch 0.1.0

CRAN release: 2021-04-16

  • Initial release with support for the core diff, match, and patch functions.

  • Added a NEWS.md file to track changes to the package.