What's new in PCRE 8.30
Mar 20, 2012
- Renamed "isnumber" as "is_a_number" because in some Mac environments this name is defined in ctype.h.
- Fixed a bug in fixed-length calculation for okbehinds that would show up only in quite long subpatterns.
- Removed the function pcre_info(), which has been obsolete and deprecated since it was replaced by pcre_fullinfo() in February 2000.
- For a non-anchored pattern, if (*SKIP) was given with a name that did not match a (*MARK), and the match failed at the start of the subject, a reference to memory before the start of the subject could occur. This bug was introduced by fix 17 of release 8.21.
- A reference to an unset group with zero minimum repetition was giving totally wrong answers (in non-JavaScript-compatibility mode). For example,
- another)?(\1?)test/ matched against "hello world test". This bug was introduced in release 8.13.
- Add support for 16-bit character strings (a large amount of work involving many changes and refactorings).
- RunGrepTest failed on msys because \r\n was replaced by whitespace when the command "pattern=`printf 'xxx\r\njkl'`" was run. The pattern is now taken from a file.
- Ovector size of 2 is also supported by JIT based pcre_exec (the ovector size rounding is not applied in this particular case).
- The invalid Unicode surrogate codepoints U+D800 to U+DFFF are now rejected if they appear, or are escaped, in patterns.
- Get rid of a number of -Wunused-but-set-variable warnings.
- The pattern /(?=(*:x))(q|)/ matches an empty string, and returns the mark "x". The similar pattern /(?=(*:x))((*:y)q|)/ did not return a mark at all.
- Oddly, Perl behaves the same way. PCRE has been fixed so that this pattern also returns the mark "x". This bug applied to capturing parentheses, non-capturing parentheses, and atomic parentheses. It also applied to some assertions.
- The patch to CMakeLists.txt allows it to parse the version information out of configure.ac nstead of relying on pcre.h.generic, which is not stored in the repository.
- Applied Dmitry V. Levin's patch for a more portable method for linking with -lreadline.
- ZH added PCRE_CONFIG_JITTARGET; added its output to pcretest -C.
- Applied Graycode's patch to put the top-level frame on the stack rather than the heap when not using the stack for recursion. This gives a performance improvement in many cases when recursion is not deep.
- Experimental code added to "pcretest -C" to output the stack frame size.