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ChangeLog for PCRE |
ChangeLog for PCRE |
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Version 8.30 |
Version 8.31 |
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1. Renamed "isnumber" as "is_a_number" because in some Mac environments this |
1. Fixing a wrong JIT test case and some compiler warnings. |
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name is defined in ctype.h. |
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2. Removed a bashism from the RunTest script. |
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3. Add a cast to pcre_exec.c to fix the warning "unary minus operator applied |
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to unsigned type, result still unsigned" that was given by an MS compiler |
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on encountering the code "-sizeof(xxx)". |
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4. Partial matching support is added to the JIT compiler. |
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5. Fixed several bugs concerned with partial matching of items that consist |
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of more than one character: |
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(a) /^(..)\1/ did not partially match "aba" because checking references was |
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done on an "all or nothing" basis. This also applied to repeated |
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references. |
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(b) \R did not give a hard partial match if \r was found at the end of the |
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subject. |
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(c) \X did not give a hard partial match after matching one or more |
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characters at the end of the subject. |
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(d) When newline was set to CRLF, a pattern such as /a$/ did not recognize |
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a partial match for the string "\r". |
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(e) When newline was set to CRLF, the metacharacter "." did not recognize |
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a partial match for a CR character at the end of the subject string. |
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6. If JIT is requested using /S++ or -s++ (instead of just /S+ or -s+) when |
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running pcretest, the text "(JIT)" added to the output whenever JIT is |
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actually used to run the match. |
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7. Individual JIT compile options can be set in pcretest by following -s+[+] |
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or /S+[+] with a digit between 1 and 7. |
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8. OP_NOT now supports any UTF character not just single-byte ones. |
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9. (*MARK) control verb is now supported by the JIT compiler. |
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10. The command "./RunTest list" lists the available tests without actually |
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running any of them. (Because I keep forgetting what they all are.) |
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2. Fixed a bug in the code for calculating the fixed length of lookbehind |
11. Add PCRE_INFO_MAXLOOKBEHIND. |
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assertions. |
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12. Applied a (slightly modified) user-supplied patch that improves performance |
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when the heap is used for recursion (compiled with --disable-stack-for- |
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recursion). Instead of malloc and free for each heap frame each time a |
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logical recursion happens, frames are retained on a chain and re-used where |
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possible. This sometimes gives as much as 30% improvement. |
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13. As documented, (*COMMIT) is now confined to within a recursive subpattern |
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call. |
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14. As documented, (*COMMIT) is now confined to within a positive assertion. |
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15. It is now possible to link pcretest with libedit as an alternative to |
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libreadline. |
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16. (*COMMIT) control verb is now supported by the JIT compiler. |
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6. The Unicode data tables have been updated to Unicode 6.1.0. |
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Version 8.30 04-February-2012 |
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----------------------------- |
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1. Renamed "isnumber" as "is_a_number" because in some Mac environments this |
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name is defined in ctype.h. |
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2. Fixed a bug in fixed-length calculation for lookbehinds that would show up |
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only in quite long subpatterns. |
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3. Removed the function pcre_info(), which has been obsolete and deprecated |
3. Removed the function pcre_info(), which has been obsolete and deprecated |
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since it was replaced by pcre_fullinfo() in February 2000. |
since it was replaced by pcre_fullinfo() in February 2000. |
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4. For a non-anchored pattern, if (*SKIP) was given with a name that did not |
4. For a non-anchored pattern, if (*SKIP) was given with a name that did not |
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match a (*MARK), and the match failed at the start of the subject, a |
match a (*MARK), and the match failed at the start of the subject, a |
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reference to memory before the start of the subject could occur. This bug |
reference to memory before the start of the subject could occur. This bug |
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was introduced by fix 17 of release 8.21. |
was introduced by fix 17 of release 8.21. |
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5. A reference to an unset group with zero minimum repetition was giving |
5. A reference to an unset group with zero minimum repetition was giving |
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totally wrong answers (in non-JavaScript-compatibility mode). For example, |
totally wrong answers (in non-JavaScript-compatibility mode). For example, |
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/(another)?(\1?)test/ matched against "hello world test". This bug was |
/(another)?(\1?)test/ matched against "hello world test". This bug was |
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introduced in release 8.13. |
introduced in release 8.13. |
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6. Add support for 16-bit character strings (a large amount of work involving |
6. Add support for 16-bit character strings (a large amount of work involving |
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many changes and refactorings). |
many changes and refactorings). |
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7. RunGrepTest failed on msys because \r\n was replaced by whitespace when the |
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command "pattern=`printf 'xxx\r\njkl'`" was run. The pattern is now taken |
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from a file. |
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8. Ovector size of 2 is also supported by JIT based pcre_exec (the ovector size |
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rounding is not applied in this particular case). |
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9. The invalid Unicode surrogate codepoints U+D800 to U+DFFF are now rejected |
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if they appear, or are escaped, in patterns. |
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10. Get rid of a number of -Wunused-but-set-variable warnings. |
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11. The pattern /(?=(*:x))(q|)/ matches an empty string, and returns the mark |
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"x". The similar pattern /(?=(*:x))((*:y)q|)/ did not return a mark at all. |
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Oddly, Perl behaves the same way. PCRE has been fixed so that this pattern |
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also returns the mark "x". This bug applied to capturing parentheses, |
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non-capturing parentheses, and atomic parentheses. It also applied to some |
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assertions. |
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12. Stephen Kelly's patch to CMakeLists.txt allows it to parse the version |
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information out of configure.ac instead of relying on pcre.h.generic, which |
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is not stored in the repository. |
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13. Applied Dmitry V. Levin's patch for a more portable method for linking with |
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-lreadline. |
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14. ZH added PCRE_CONFIG_JITTARGET; added its output to pcretest -C. |
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15. Applied Graycode's patch to put the top-level frame on the stack rather |
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than the heap when not using the stack for recursion. This gives a |
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performance improvement in many cases when recursion is not deep. |
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16. Experimental code added to "pcretest -C" to output the stack frame size. |
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Version 8.21 12-Dec-2011 |
Version 8.21 12-Dec-2011 |
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------------------------ |
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