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ng_prefilter: turn large max bound into inf

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During prefilter region replacement, turn regions with very large max
bounds into repeats with inf max bound. This improves compile time and
the likelihood that we will actually be able to build an implementation
for such patterns.
This commit is contained in:
Justin Viiret
2015-12-14 10:08:57 +11:00
committed by Matthew Barr
parent fb932616ca
commit 98eff64edf
2 changed files with 31 additions and 12 deletions
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1
unit/hyperscan/bad_patterns.txt
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@@ -117,7 +117,6 @@
117:/[\x{ff]/ #Value in \x{...} sequence is non-hex or missing } at index 1.
118:/foo/{min_offset=10,max_offset=9} #In hs_expr_ext, min_offset must be less than or equal to max_offset.
120:/foo/{min_length=10,max_offset=9} #In hs_expr_ext, min_length must be less than or equal to max_offset.
121:/.e(?:(((eEbd..(d[^Be]{1,7}|A)){8,22}aD.){7}|EecA?(?:\b)c|bB[Dd])){29,37}[adb](?:.|A|c|[BEA]|D)..((?:c|[Cba]))?([Ee]|D)B+(.|[dbB]|E|E).[EcCe]ce(?:C|D)dD[EA]Ac.[aE]d/smiHWP #Pattern too large.
122:/<2F><>/8 #Expression is not valid UTF-8.
123:/hello \6 world/P #Invalid back reference to expression 6.
124:/hello \6 world|dog/P #Invalid back reference to expression 6.