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diff3: Use logical operations for booleans, not bitwise
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Authored by emaste on Nov 18 2025, 5:08 PM.
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fuz
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rG98d08b86b4e5: diff3: Use logical-not, not bitwise for booleans
rG56bdfd2d967a: diff3: Use logical-not, not bitwise for booleans
rGabcb80f46c26: diff3: Use logical-not, not bitwise for booleans

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emaste requested review of this revision.Nov 18 2025, 5:08 PM
emaste created this revision.

Hmm, should also be && I guess.

emaste updated this revision to Diff 166695.Nov 18 2025, 5:41 PM

incompat is actually an int that's incremented, so is not necessarily 0/1. explicitly compare != 0
leave bitwise & in place as that's what's still in the upstream GNU diff3

fuz added inline comments.Nov 18 2025, 5:53 PM
contrib/diff/src/diff3.c
304

This changes the semantics if incompat is neither 0 nor 1. Could have been a bug before, but could also be intentional.

emaste added a comment.Nov 18 2025, 6:14 PM

I

contrib/diff/src/diff3.c
304

It was a bug; as the comment suggests any of the options AeExX3 without m should imply edscript. incompat is incremented for each of these options. Upstream has this fixed in a different way.

fuz accepted this revision.Nov 18 2025, 6:24 PM

Sounds reasonable.

This revision is now accepted and ready to land.Nov 18 2025, 6:24 PM
Closed by commit rGabcb80f46c26: diff3: Use logical-not, not bitwise for booleans (authored by emaste). · Explain WhyNov 18 2025, 6:55 PM
This revision was automatically updated to reflect the committed changes.
emaste added a commit: rGabcb80f46c26: diff3: Use logical-not, not bitwise for booleans.
Herald added a subscriber: imp. · View Herald TranscriptNov 18 2025, 6:56 PM
emaste added a commit: rG56bdfd2d967a: diff3: Use logical-not, not bitwise for booleans.Dec 9 2025, 4:33 PM
emaste added a commit: rG98d08b86b4e5: diff3: Use logical-not, not bitwise for booleans.Dec 16 2025, 3:50 PM

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