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104 Commits

Author SHA1 Message Date
Maxime Coste
11abd544c6 Regex: avoid infinite loops 2017-11-01 14:05:14 +08:00
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
071b897e00 Regex: Remove static RegexCompiler::compile 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
b53227d62c Regex: slight cleanup of the unit tests 2017-11-01 14:05:14 +08:00
Maxime Coste
337e58d4f9 Regex: Cleanup character class parsing a bit 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
741772aef9 Regex: Optimize single char character classes as literals 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
f1b4931824 Regex: Fix handling of non capturing groups (?:...) 
We were wrongly keeping the `:` as a literal content of the group
 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
e0fac20f6c Regex: Use a custom allocated buffer for Saves instead of a Vector 2017-11-01 14:05:14 +08:00
Maxime Coste
51ad8b4c85 Regex: fix handling of negative escaped character classes 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
630d078b6d Regex: Fix use of not-yet-constructed CompiledRegex in TestVM impl 2017-11-01 14:05:14 +08:00
Maxime Coste
b4f923b7fc Regex: min/max quantifiers can be non greedy as well 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
76dcfd5c52 Regex: support escaping characters in character classes 2017-11-01 14:05:14 +08:00
Maxime Coste
3d2262bebf Regex: add support for case insensitive matching, controlled by (?i) 2017-11-01 14:05:14 +08:00
Maxime Coste
7673781751 Regex: use \A \z for subject start/end 
This is the most common syntax in various regex variants.
 2017-11-01 14:05:14 +08:00
Maxime Coste
0bdfdac5c5 Regex: Implement lookarounds for fixed literal strings 
We do not support anything else than a plain literal string for
lookarounds.
 2017-11-01 14:05:14 +08:00
Maxime Coste
e96cd29f0e Regex: Support non greedy quantifiers 2017-11-01 14:05:14 +08:00
Maxime Coste
e4004a7b7f Regex: Add support for \h and \H "horizontal blank" character classes 2017-11-01 14:05:14 +08:00
Maxime Coste
4ac0d35d1e Regex: Add support for \K that reset the start capture 2017-11-01 14:05:14 +08:00
Maxime Coste
2f450e0080 Regex: Add support for \Q...\E quoted parts 2017-11-01 14:05:14 +08:00
Maxime Coste
7a313ddafe Regex: small error message improvement 2017-11-01 14:05:14 +08:00
Maxime Coste
c282b699d7 Regex: fix support for - at end of a character class 2017-11-01 14:05:14 +08:00
Maxime Coste
e41d228af8 Regex: Disable dumping regex instructions by default in unit tests 2017-11-01 14:05:14 +08:00
Maxime Coste
d5048281a6 Regex: slight cleanup of the unit tests 2017-11-01 14:05:14 +08:00
Maxime Coste
f7468b576e Regex: Refactor regex compilation to a regular RegexCompiler class 2017-11-01 14:05:14 +08:00
Maxime Coste
d5717edc9d Regex: improve regex parse error reporting 
Display the place where parsing failed, refactor code to make
RegexParser a regular object.
 2017-11-01 14:05:14 +08:00
Maxime Coste
080160553c Regex: support escaped character classes 2017-11-01 14:05:14 +08:00
Maxime Coste
1a8ad3759f Regex: fix handling of strict quantifiers {N} 
Previous behaviour was treating {N} as {N,}
 2017-11-01 14:05:14 +08:00
Maxime Coste
be157453ad Regex: Use a std::function based "Matcher" op to implement character classes 
This is more extensible and should allow easier support for non ranges
classes.
 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
002aba562f Regex: work on unicode codepoints instead of raw bytes 2017-11-01 14:05:14 +08:00
Maxime Coste
75608ea223 Regex: when in full match mode, do not accept trailing data 2017-11-01 14:05:14 +08:00
Maxime Coste
490c130e41 Regex: Implement leftmost matching 
Ensure threads are maintained in "priority" order, by having two
split instruction (prioritizing parent or child).
 2017-11-01 14:05:14 +08:00
Maxime Coste
182b70cb0a Regex: Add initial support for character ranges 2017-11-01 14:05:14 +08:00
Maxime Coste
52678fafa1 Regex: Add support for searching 
Always compile a `.*` as the first instructions in a regex bytecode,
depending on the match or search mode, the RegexVM will either execute
this or skip it and start directly at the matching bytecode.
 2017-11-01 14:05:14 +08:00
Maxime Coste
f7b8c1c79d Regex: cleanup and reorganize regex code and improve capture support 
Introduce the CompiledRegex class, rename ThreadedExecutor to
ThreadedRegexVM, remove the RegexProgram namespace.
 2017-11-01 14:05:14 +08:00
Maxime Coste
023511deff Regex: WIP support for saving captures 2017-11-01 14:05:14 +08:00
Maxime Coste
ad546e516a Regex: Small comment tweaks 2017-11-01 14:05:14 +08:00
Maxime Coste
46a113e10a Regex: Add support for curly braces count expressions 2017-11-01 14:05:14 +08:00
Maxime Coste
d04c60b911 Regex: Add support for subject begin/end assertion (\` and \') 2017-11-01 14:05:14 +08:00
Maxime Coste
9c5d539616 Regex: Add word boundary assertion support 2017-11-01 14:05:14 +08:00
Maxime Coste
a9a04e81b0 Regex: Ensure we only ever have a single thread on a given instruction 2017-11-01 14:05:14 +08:00
Maxime Coste
ee42c6b0ba Regex: add unit test to check the ".*" construct 2017-11-01 14:05:14 +08:00
Maxime Coste
4010c44fc0 Regex: Make the Split op only take a single offset parameter 
Split now creates a new thread and keep the current one running, as
all of its uses are compatible with this behaviour, which enable a
more compact compiled code.
 2017-11-01 14:05:14 +08:00
Maxime Coste
f9dc6774b9 Regex: Introduce RegexProgram::ThreadedExecutor and add line end/begin impl 2017-11-01 14:05:14 +08:00
Maxime Coste
a448e1e222 Regex: Code cleanup in the regex impl 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