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We already fell back to Stone for FIFOs, but we actually need to fall
back to Stone for everything except regular files, because libdiff's
atomizer needs to know the size of its input in advance, and neither
FIFOs nor devices can be trusted to report their size.
MFC after: 1 week
Reported by: mav
Reviewed by: mav, allanjude
Differential Revision: https://reviews.freebsd.org/D48181
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This patch got accidentally left out when libdiff was imported. The
rest of the code (command-line option etc.) was present, just not the
part that actually prints ANSI color codes.
Sponsored by: Klara, Inc.
Reviewed by: kevans
Differential Revision: https://reviews.freebsd.org/D46873
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Sponsored by: Klara, Inc.
Reviewed by: allanjude, markj
Differential Revision: https://reviews.freebsd.org/D45219
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MFC after: 1 week
Sponsored by: Klara, Inc.
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D45078
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This adds support for two new diff algorithms, Myers diff and Patience
diff.
These algorithms perform a different form of search compared to the
classic Stone algorithm and support escapes when worst case scenarios
are encountered.
Add the -A flag to allow selection of the algorithm, but default to
using the new Myers diff implementation.
The libdiff implementation currently only supports a subset of input and
output options supported by diff. When these options are used, but the
algorithm is not selected, automatically fallback to the classic Stone
algorithm until support for these modes can be added.
Based on work originally done by thj@ with contributions from kevans@.
Sponsored by: Klara, Inc.
Reviewed by: thj
Differential Revision: https://reviews.freebsd.org/D44302
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