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* fix crash in regexec for nonzero nmatch argument with REG_NOSUBRich Felker2014-07-281-0/+1
| | | | | | | per POSIX, the nmatch and pmatch arguments are ignored when the regex was compiled with REG_NOSUB. (cherry picked from commit 72ed3d47e567b1635a35d3c1d174c8a8b2787e30)
* revert regex "cleanup" that seems unjustified and may break backtrackingRich Felker2013-02-011-0/+3
| | | | | | it's not clear to me at the moment whether the code that was removed (and which is now being re-added) is needed, but it's far from being a no-op, and i don't want to risk breaking regex in this release.
* regex: remove an unused local variable from regexecSzabolcs Nagy2013-01-141-3/+0
| | | | pos_start local variable is not used in tre_tnfa_run_backtrack
* use restrict everywhere it's required by c99 and/or posix 2008Rich Felker2012-09-061-2/+2
| | | | | | | | to deal with the fact that the public headers may be used with pre-c99 compilers, __restrict is used in place of restrict, and defined appropriately for any supported compiler. we also avoid the form [restrict] since older versions of gcc rejected it due to a bug in the original c99 standard, and instead use the form *restrict.
* fix signedness error handling invalid multibyte sequences in regexecRich Felker2012-04-141-2/+2
| | | | | | | the "< 0" test was always false due to use of an unsigned type. this resulted in infinite loops on 32-bit machines (adding -1U to a pointer is the same as adding -1) and crashes on 64-bit machines (offsetting the string pointer by 4gb-1b when an illegal sequence was hit).
* upgrade to latest upstream TRE regex code (0.8.0)Rich Felker2012-03-201-241/+145
| | | | | | | | | | | | | | | | | | | the main practical results of this change are 1. the regex code is no longer subject to LGPL; it's now 2-clause BSD 2. most (all?) popular nonstandard regex extensions are supported I hesitate to call this a "sync" since both the old and new code are heavily modified. in one sense, the old code was "more severely" modified, in that it was actively hostile to non-strictly-conforming expressions. on the other hand, the new code has eliminated the useless translation of the entire regex string to wchar_t prior to compiling, and now only converts multibyte character literals as needed. in the future i may use this modified TRE as a basis for writing the long-planned new regex engine that will avoid multibyte-to-wide character conversion entirely by compiling multibyte bracket expressions specific to UTF-8.
* fix bug in TRE found by clang (typo && instead of &)Rich Felker2011-04-071-1/+1
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* initial check-in, version 0.5.0 v0.5.0Rich Felker2011-02-121-0/+1107