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ChangeLog for PCRE |
ChangeLog for PCRE |
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Version 7.1 12-Mar-07 |
Version 7.3 05-Jul-07 |
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1. In the rejigging of the build system that eventually resulted in 7.1, the |
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line "#include <pcre.h>" was included in pcre_internal.h. The use of angle |
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brackets there is not right, since it causes compilers to look for an |
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installed pcre.h, not the version that is in the source that is being |
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compiled (which of course may be different). I have changed it back to: |
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#include "pcre.h" |
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I have a vague recollection that the change was concerned with compiling in |
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different directories, but in the new build system, that is taken care of |
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by the VPATH setting the Makefile. |
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2. The pattern .*$ when run in not-DOTALL UTF-8 mode with newline=any failed |
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when the subject happened to end in the byte 0x85 (e.g. if the last |
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character was \x{1ec5}). *Character* 0x85 is one of the "any" newline |
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characters but of course it shouldn't be taken as a newline when it is part |
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of another character. The bug was that, for an unlimited repeat of . in |
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not-DOTALL UTF-8 mode, PCRE was advancing by bytes rather than by |
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characters when looking for a newline. |
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3. A small performance improvement in the DOTALL UTF-8 mode .* case. |
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Version 7.2 19-Jun-07 |
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1. If the fr_FR locale cannot be found for test 3, try the "french" locale, |
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which is apparently normally available under Windows. |
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2. Re-jig the pcregrep tests with different newline settings in an attempt |
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to make them independent of the local environment's newline setting. |
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3. Add code to configure.ac to remove -g from the CFLAGS default settings. |
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4. Some of the "internals" tests were previously cut out when the link size |
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was not 2, because the output contained actual offsets. The recent new |
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"Z" feature of pcretest means that these can be cut out, making the tests |
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usable with all link sizes. |
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5. Implemented Stan Switzer's goto replacement for longjmp() when not using |
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stack recursion. This gives a massive performance boost under BSD, but just |
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a small improvement under Linux. However, it saves one field in the frame |
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in all cases. |
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6. Added more features from the forthcoming Perl 5.10: |
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(a) (?-n) (where n is a string of digits) is a relative subroutine or |
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recursion call. It refers to the nth most recently opened parentheses. |
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(b) (?+n) is also a relative subroutine call; it refers to the nth next |
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to be opened parentheses. |
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(c) Conditions that refer to capturing parentheses can be specified |
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relatively, for example, (?(-2)... or (?(+3)... |
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(d) \K resets the start of the current match so that everything before |
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is not part of it. |
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(e) \k{name} is synonymous with \k<name> and \k'name' (.NET compatible). |
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(f) \g{name} is another synonym - part of Perl 5.10's unification of |
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reference syntax. |
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(g) (?| introduces a group in which the numbering of parentheses in each |
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alternative starts with the same number. |
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(h) \h, \H, \v, and \V match horizontal and vertical whitespace. |
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7. Added two new calls to pcre_fullinfo(): PCRE_INFO_OKPARTIAL and |
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PCRE_INFO_JCHANGED. |
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8. A pattern such as (.*(.)?)* caused pcre_exec() to fail by either not |
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terminating or by crashing. Diagnosed by Viktor Griph; it was in the code |
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for detecting groups that can match an empty string. |
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9. A pattern with a very large number of alternatives (more than several |
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hundred) was running out of internal workspace during the pre-compile |
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phase, where pcre_compile() figures out how much memory will be needed. A |
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bit of new cunning has reduced the workspace needed for groups with |
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alternatives. The 1000-alternative test pattern now uses 12 bytes of |
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workspace instead of running out of the 4096 that are available. |
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10. Inserted some missing (unsigned int) casts to get rid of compiler warnings. |
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11. Applied patch from Google to remove an optimization that didn't quite work. |
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The report of the bug said: |
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pcrecpp::RE("a*").FullMatch("aaa") matches, while |
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pcrecpp::RE("a*?").FullMatch("aaa") does not, and |
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pcrecpp::RE("a*?\\z").FullMatch("aaa") does again. |
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12. If \p or \P was used in non-UTF-8 mode on a character greater than 127 |
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it matched the wrong number of bytes. |
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Version 7.1 24-Apr-07 |
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1. Applied Bob Rossi and Daniel G's patches to convert the build system to one |
1. Applied Bob Rossi and Daniel G's patches to convert the build system to one |
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5. Updated the support (such as it is) for Virtual Pascal, thanks to Stefan |
5. Updated the support (such as it is) for Virtual Pascal, thanks to Stefan |
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Weber: (1) pcre_internal.h was missing some function renames; (2) updated |
Weber: (1) pcre_internal.h was missing some function renames; (2) updated |
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makevp.bat for the current PCRE, using the additional files |
makevp.bat for the current PCRE, using the additional files |
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makevp-c.txt, makevp-l.txt, and pcregexp.pas. |
makevp_c.txt, makevp_l.txt, and pcregexp.pas. |
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6. A Windows user reported a minor discrepancy with test 2, which turned out |
6. A Windows user reported a minor discrepancy with test 2, which turned out |
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to be caused by a trailing space on an input line that had got lost in his |
to be caused by a trailing space on an input line that had got lost in his |
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14. If erroroffset was passed as NULL to pcre_compile, it provoked a |
14. If erroroffset was passed as NULL to pcre_compile, it provoked a |
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segmentation fault instead of returning the appropriate error message. |
segmentation fault instead of returning the appropriate error message. |
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15. In multiline mode when the newline sequence was set to "any", the pattern |
15. In multiline mode when the newline sequence was set to "any", the pattern |
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^$ would give a match between the \r and \n of a subject such as "A\r\nB". |
^$ would give a match between the \r and \n of a subject such as "A\r\nB". |
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This doesn't seem right; it now treats the CRLF combination as the line |
This doesn't seem right; it now treats the CRLF combination as the line |
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ending, and so does not match in that case. It's only a pattern such as ^$ |
ending, and so does not match in that case. It's only a pattern such as ^$ |
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that would hit this one: something like ^ABC$ would have failed after \r |
that would hit this one: something like ^ABC$ would have failed after \r |
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and then tried again after \r\n. |
and then tried again after \r\n. |
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16. Changed the comparison command for RunGrepTest from "diff -u" to "diff -ub" |
16. Changed the comparison command for RunGrepTest from "diff -u" to "diff -ub" |
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in an attempt to make files that differ only in their line terminators |
in an attempt to make files that differ only in their line terminators |
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compare equal. This works on Linux. |
compare equal. This works on Linux. |
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17. Under certain error circumstances pcregrep might try to free random memory |
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as it exited. This is now fixed, thanks to valgrind. |
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19. In pcretest, if the pattern /(?m)^$/g<any> was matched against the string |
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"abc\r\n\r\n", it found an unwanted second match after the second \r. This |
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was because its rules for how to advance for /g after matching an empty |
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string at the end of a line did not allow for this case. They now check for |
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it specially. |
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20. pcretest is supposed to handle patterns and data of any length, by |
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extending its buffers when necessary. It was getting this wrong when the |
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buffer for a data line had to be extended. |
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21. Added PCRE_NEWLINE_ANYCRLF which is like ANY, but matches only CR, LF, or |
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CRLF as a newline sequence. |
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22. Code for handling Unicode properties in pcre_dfa_exec() wasn't being cut |
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out by #ifdef SUPPORT_UCP. This did no harm, as it could never be used, but |
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I have nevertheless tidied it up. |
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23. Added some casts to kill warnings from HP-UX ia64 compiler. |
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24. Added a man page for pcre-config. |
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Version 7.0 19-Dec-06 |
Version 7.0 19-Dec-06 |
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