zregex
A regular expression library for Zig with PCRE semantics, four engines behind one API, and a JIT for x86-64 and aarch64.
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Commits on main
Take Zig 0.17.0 from nixpkgs
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Add a References cited section
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Say where the repository and its mirrors live
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Publish benchmark results only when there are some
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Follow the forge to git.jcollie.dev
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Build with Zig 0.17.0
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Begin 0.2.0 development
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Release 0.1.0 v0.1.0 zig-0.16
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Correct source comments that had drifted from the code
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Reconcile the README with the four-engine reality and itself
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Stop the README from also calling \v a vertical tab
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Update uucode past the case-folding bugs it once had
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Right-size the weekly macOS fuzz to fit the runner and the clock
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Run the weekly oracle on Linux only; the macOS leg was timing out on it
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Add CLAUDE.md
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Pin that deep lookaround nesting stays bounded
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Size the weekly macOS fuzz chunks to the runner's memory
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Bound the run-time scratch three engines grow with the haystack
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Build the oracle's PCRE2 with the Zig build system, pinned at 10.48
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Pin the weekly fuzz reference to PCRE2 10.47, and chunk the macOS run
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Refresh the benchmark snapshot, and unbreak the comparative report
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Compile a caseless letter's class to compares, not a bit table
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Bring every doc comment back in line with what the code now does
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Fuzz the aarch64 JIT on every push, and add a weekly long fuzz run
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Check every match refinds itself, and mutate subjects and flags too
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Refuse a findAt start past the end instead of reading out of bounds
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Close out the residual divergences and the iterator's budget loophole
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Bound what adversarial patterns can allocate
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Hold findAt to PCRE2, mutate the corpus, and fix the class it caught
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Compare every match, probe pathological inputs, and fix what both found
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Fuzz three more axes and PCRE2's corpus, and fix what they found
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Widen what the fuzzer generates, and fix the three bugs it found
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End a repeat at an empty iteration once its minimum is met
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Make the Pike VM agree with PCRE on empty loop iterations
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Fuzz long haystacks and offset searches, fixing two bugs they found
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Widen the fuzzer, add a PCRE2 oracle, and follow PCRE where we did not
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Check cross-target builds through the build system
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Run the JIT on Windows
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Add a differential fuzzer across the engines, and fix what it found
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Add pinact to the dev shell and record the cross-platform results
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Pin CI actions and record the cross-platform benchmark results
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Add a GitHub Actions matrix across the platforms the JIT differs on
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Support JIT on Apple platforms via MAP_JIT
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Add an aarch64 JIT backend with NEON run scanning
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Give the JIT a fused program, add AVX2, and route by bounded backtracking
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Vectorize repeat scanning and drop provably futile greedy retries
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Add an x86-64 JIT as a third engine
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Add CI, API docs building and serving, and docs publishing
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Expand the supported-syntax README section into reference tables
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Required-literal scanning and dynamic lead-run skipping
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Add backref-aware memoization to the backtracker
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Speed up the backtracker: fused repeats, run skipping, ASCII decode
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Add RE2-style lazy DFA for match-span finding
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Lazy capture handling: no group-0 saves, slot chains in the Pike VM
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Add first-byte prefilter to both engines
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Add cross-implementation benchmark suite
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Add inline flags: (?ims), (?-ims), and scoped (?ims-ims:...)
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Initial implementation of zregex
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