Hyperscan Change Log

This is a list of notable changes to Hyperscan, in reverse chronological order.

[4.1.0] 2015-12-18

Update version of PCRE used by testing tools as a syntax and semantic reference to PCRE 8.38.
Small updates to fix warnings identified by Coverity.
Clean up and unify exception handling behaviour across GPR and SIMD NFA models.
Fix bug in handling of bounded repeat triggers with large gaps between them for sparse repeat model.
Correctly reject POSIX collating elements ([.ch.], [=ch=]) in the parser. These are not supported by Hyperscan.
Add support for quoted sequences (\Q...\E) inside character classes.
Simplify FDR literal matcher runtime by removing some static specialization.
Fix handling of the POSIX [:graph:], [:print:] and [:punct:] character classes to match the behaviour of PCRE 8.38 in both standard operation and with the UCP flag set. (Note: some bugs were fixed in this area in PCRE 8.38.) Previously Hyperscan's behaviour was the same as versions of PCRE before 8.34.
Improve performance when compiling pattern sets that include a large number of similar bounded repeat constructs. (github issue #9)

Minor cleanups to test code.
CMake and other build system improvements.
API update: allow hs_reset_stream() and hs_reset_and_copy_stream() to be supplied with a NULL scratch pointer if no matches are required. This is in line with the behaviour of hs_close_stream().
Disallow bounded repeats with a very large minimum repeat but no maximum, i.e. {N,} for very large N.
Reduce compile memory usage in literal set explansion for some large cases.