Commit Graph

24 Commits

Author SHA1 Message Date
Maxime Coste
c47cdc06a7 Regex: Add support for backward matching
Regex can be compiled for backward matching instead of forward matching
and the ThreadedRegexVM is able to iterate in reverse on the subject
string to find the last match instead of the first.
2017-11-01 14:05:14 +08:00
Maxime Coste
52ee62172a Regex: remove use of buffer_utils.hh from regex_impl.cc 2017-11-01 14:05:14 +08:00
Maxime Coste
c375268c2d Regex: Use memcpy to write/read offsets from bytecode
reinterpret_cast was undefined behaviour as we do not guarantee
that offsets are going to be stored properly aligned.
2017-11-01 14:05:14 +08:00
Maxime Coste
236751cb84 Regex: Make ThreadedRegexVM a proper class, define a proper interface 2017-11-01 14:05:14 +08:00
Maxime Coste
3b69dda04e Regex: Find potential start position using a map of valid start chars
With this optimization we get close to performance parity with boost
regex on the common use cases in Kakoune.
2017-11-01 14:05:14 +08:00
Maxime Coste
fabeab1ee1 Regex: reorder lookaround ops, group by direction 2017-11-01 14:05:14 +08:00
Maxime Coste
854144c535 Regex: Fix handling of Save instruction in ThreadedRegexVM
When not saving, we were not fully reading the instruction stream,
leading to an out of sync instruction pointer.
2017-11-01 14:05:14 +08:00
Maxime Coste
5f6e71c4dc Regex: More code tweaks and cleanups in ThreadedRegexVM 2017-11-01 14:05:14 +08:00
Maxime Coste
5f54e0de0e Regex: Code cleanup and refactor for Saves handling 2017-11-01 14:05:14 +08:00
Maxime Coste
dbb175841b Regex: do not write the search prefix inside the program bytecode
Its faster to have specialized code in the VM directly
2017-11-01 14:05:14 +08:00
Maxime Coste
cf5055f68b Regex: small code tweak 2017-11-01 14:05:14 +08:00
Maxime Coste
e0fac20f6c Regex: Use a custom allocated buffer for Saves instead of a Vector 2017-11-01 14:05:14 +08:00
Maxime Coste
1399563e40 Regex: make m_current_threads and m_next_threads local variable of exec 2017-11-01 14:05:14 +08:00
Maxime Coste
54da8098ae Regex: Add a NoSaves RegexExecFlags to disable saving positions 2017-11-01 14:05:14 +08:00
Maxime Coste
119bc38254 Regex: small refactor of ThreadedRegexVM::clone_saves 2017-11-01 14:05:14 +08:00
Maxime Coste
9fbafba4cb Regex: Refactor thread handling in ThreadedRegexVM 2017-11-01 14:05:14 +08:00
Maxime Coste
589cde67f0 Regex: store saves in a copy on write structure 2017-11-01 14:05:14 +08:00
Maxime Coste
11b9c996ea Regex: small code style tweak 2017-11-01 14:05:14 +08:00
Maxime Coste
f007794d9c Regex: introduce RegexExecFlags to control various behaviours 2017-11-01 14:05:14 +08:00
Maxime Coste
73b14b11be Regex: small code tweak in ThreadedRegexVM 2017-11-01 14:05:14 +08:00
Maxime Coste
5b0c2cbdc2 Regex: Ensure we dont have a thread explosion in ThreadedRegexVM
Always remove threads with lower priority that end up on the same
instruction as a higher priority thread (as we know they will behave
the same from now on)
2017-11-01 14:05:14 +08:00
Maxime Coste
f02b2645da Regex: validate that our custom impl gets the same results as boost regex
In addition to running boost regex, run our custom regex and compare
the results to ensure the two regex engine agree.
2017-11-01 14:05:14 +08:00
Maxime Coste
eb1015cdfb Regex: whenever Kakoune compiles a regex, pass it to the custom impl as well
That way we can see which features are missing.
2017-11-01 14:05:14 +08:00
Maxime Coste
8c9976ea72 Regex: Add initial, exploratory work on a custom regex engine 2017-11-01 14:05:14 +08:00