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revision 118 by ph10, Fri Mar 9 16:17:46 2007 UTC revision 169 by ph10, Mon Jun 4 10:49:21 2007 UTC
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1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 7.1 05-Mar-07  Version 7.2 01-May-07
5    ---------------------
6    
7     1. If the fr_FR locale cannot be found for test 3, try the "french" locale,
8        which is apparently normally available under Windows.
9    
10     2. Re-jig the pcregrep tests with different newline settings in an attempt
11        to make them independent of the local environment's newline setting.
12    
13     3. Add code to configure.ac to remove -g from the CFLAGS default settings.
14    
15     4. Some of the "internals" tests were previously cut out when the link size
16        was not 2, because the output contained actual offsets. The recent new
17        "Z" feature of pcretest means that these can be cut out, making the tests
18        usable with all link sizes.
19    
20     5. Implemented Stan Switzer's goto replacement for longjmp() when not using
21        stack recursion. This gives a massive performance boost under BSD, but just
22        a small improvement under Linux. However, it saves one field in the frame
23        in all cases.
24    
25     6. Added more features from the forthcoming Perl 5.10:
26    
27        (a) (?-n) (where n is a string of digits) is a relative subroutine or
28            recursion call. It refers to the nth most recently opened parentheses.
29    
30        (b) (?+n) is also a relative subroutine call; it refers to the nth next
31            to be opened parentheses.
32    
33        (c) Conditions that refer to capturing parentheses can be specified
34            relatively, for example, (?(-2)... or (?(+3)...
35    
36        (d) \K resets the start of the current match so that everything before
37            is not part of it.
38    
39     7. Added two new calls to pcre_fullinfo(): PCRE_INFO_OKPARTIAL and
40        PCRE_INFO_JCHANGED.
41    
42    
43    Version 7.1 24-Apr-07
44  ---------------------  ---------------------
45    
46   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
47      that is more "standard", making use of automake and other autotools. There      that is more "standard", making use of automake and other Autotools. There
48      is some re-arrangement of the files and adjustment of comments consequent      is some re-arrangement of the files and adjustment of comments consequent
49      on this.      on this.
50    
# Line 26  Version 7.1 05-Mar-07 Line 65  Version 7.1 05-Mar-07
65      .br or .in.      .br or .in.
66    
67   4. Updated comments in configure.ac that get placed in config.h.in and also   4. Updated comments in configure.ac that get placed in config.h.in and also
68      arranged for config.h to be included in the distribution, with the name      arranged for config.h to be included in the distribution, with the name
69      config.h.generic, for the benefit of those who have to compile without      config.h.generic, for the benefit of those who have to compile without
70      Autotools (compare pcre.h, which is now distributed as pcre.h.generic).      Autotools (compare pcre.h, which is now distributed as pcre.h.generic).
71    
72   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
73      Weber: (1) pcre_internal.h was missing some function renames; (2) updated      Weber: (1) pcre_internal.h was missing some function renames; (2) updated
74      makevp.bat for the current PCRE, using the additional files !compile.txt,      makevp.bat for the current PCRE, using the additional files
75      !linklib.txt, and pcregexp.pas.      makevp_c.txt, makevp_l.txt, and pcregexp.pas.
76    
77   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
78      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
# Line 63  Version 7.1 05-Mar-07 Line 102  Version 7.1 05-Mar-07
102  10. Fixed two bugs in the emulated memmove() function in pcre_internal.h:  10. Fixed two bugs in the emulated memmove() function in pcre_internal.h:
103    
104      (a) It was defining its arguments as char * instead of void *.      (a) It was defining its arguments as char * instead of void *.
105    
106      (b) It was assuming that all moves were upwards in memory; this was true      (b) It was assuming that all moves were upwards in memory; this was true
107          a long time ago when I wrote it, but is no longer the case.          a long time ago when I wrote it, but is no longer the case.
108    
109      The emulated memove() is provided for those environments that have neither      The emulated memove() is provided for those environments that have neither
110      memmove() nor bcopy(). I didn't think anyone used it these days, but that      memmove() nor bcopy(). I didn't think anyone used it these days, but that
111      is clearly not the case, as these two bugs were recently reported.      is clearly not the case, as these two bugs were recently reported.
112    
113  11. The script PrepareRelease is now distributed: it calls 132html, CleanTxt,  11. The script PrepareRelease is now distributed: it calls 132html, CleanTxt,
114      and Detrail to create the HTML documentation, the .txt form of the man      and Detrail to create the HTML documentation, the .txt form of the man
115      pages, and it removes trailing spaces from listed files. It also creates      pages, and it removes trailing spaces from listed files. It also creates
116      pcre.h.generic and config.h.generic from pcre.h and config.h. In the latter      pcre.h.generic and config.h.generic from pcre.h and config.h. In the latter
117      case, it wraps all the #defines with #ifndefs. This script should be run      case, it wraps all the #defines with #ifndefs. This script should be run
118      before "make dist".      before "make dist".
119    
120  12. Fixed two fairly obscure bugs concerned with quantified caseless matching  12. Fixed two fairly obscure bugs concerned with quantified caseless matching
121      with Unicode property support.      with Unicode property support.
122    
123      (a) For a maximizing quantifier, if the two different cases of the      (a) For a maximizing quantifier, if the two different cases of the
124          character were of different lengths in their UTF-8 codings (there are          character were of different lengths in their UTF-8 codings (there are
125          some cases like this - I found 11), and the matching function had to          some cases like this - I found 11), and the matching function had to
126          back up over a mixture of the two cases, it incorrectly assumed they          back up over a mixture of the two cases, it incorrectly assumed they
127          were both the same length.          were both the same length.
128    
129      (b) When PCRE was configured to use the heap rather than the stack for      (b) When PCRE was configured to use the heap rather than the stack for
130          recursion during matching, it was not correctly preserving the data for          recursion during matching, it was not correctly preserving the data for
131          the other case of a UTF-8 character when checking ahead for a match          the other case of a UTF-8 character when checking ahead for a match
132          while processing a minimizing repeat. If the check also involved          while processing a minimizing repeat. If the check also involved
133          matching a wide character, but failed, corruption could cause an          matching a wide character, but failed, corruption could cause an
134          erroneous result when trying to check for a repeat of the original          erroneous result when trying to check for a repeat of the original
135          character.          character.
136    
137  13. Some tidying changes to the testing mechanism:  13. Some tidying changes to the testing mechanism:
138    
139      (a) The RunTest script now detects the internal link size and whether there      (a) The RunTest script now detects the internal link size and whether there
140          is UTF-8 and UCP support by running ./pcretest -C instead of relying on          is UTF-8 and UCP support by running ./pcretest -C instead of relying on
141          values substituted by "configure". (The RunGrepTest script already did          values substituted by "configure". (The RunGrepTest script already did
142          this for UTF-8.) The configure.ac script no longer substitutes the          this for UTF-8.) The configure.ac script no longer substitutes the
143          relevant variables.          relevant variables.
144    
145      (b) The debugging options /B and /D in pcretest show the compiled bytecode      (b) The debugging options /B and /D in pcretest show the compiled bytecode
146          with length and offset values. This means that the output is different          with length and offset values. This means that the output is different
147          for different internal link sizes. Test 2 is skipped for link sizes          for different internal link sizes. Test 2 is skipped for link sizes
148          other than 2 because of this, bypassing the problem. Unfortunately,          other than 2 because of this, bypassing the problem. Unfortunately,
149          there was also a test in test 3 (the locale tests) that used /B and          there was also a test in test 3 (the locale tests) that used /B and
150          failed for link sizes other than 2. Rather than cut the whole test out,          failed for link sizes other than 2. Rather than cut the whole test out,
151          I have added a new /Z option to pcretest that replaces the length and          I have added a new /Z option to pcretest that replaces the length and
152          offset values with spaces. This is now used to make test 3 independent          offset values with spaces. This is now used to make test 3 independent
153          of link size.          of link size. (Test 2 will be tidied up later.)
154    
155    14. If erroroffset was passed as NULL to pcre_compile, it provoked a
156        segmentation fault instead of returning the appropriate error message.
157    
158    15. In multiline mode when the newline sequence was set to "any", the pattern
159        ^$ would give a match between the \r and \n of a subject such as "A\r\nB".
160        This doesn't seem right; it now treats the CRLF combination as the line
161        ending, and so does not match in that case. It's only a pattern such as ^$
162        that would hit this one: something like ^ABC$ would have failed after \r
163        and then tried again after \r\n.
164    
165    16. Changed the comparison command for RunGrepTest from "diff -u" to "diff -ub"
166        in an attempt to make files that differ only in their line terminators
167        compare equal. This works on Linux.
168    
169    17. Under certain error circumstances pcregrep might try to free random memory
170        as it exited. This is now fixed, thanks to valgrind.
171    
172    19. In pcretest, if the pattern /(?m)^$/g<any> was matched against the string
173        "abc\r\n\r\n", it found an unwanted second match after the second \r. This
174        was because its rules for how to advance for /g after matching an empty
175        string at the end of a line did not allow for this case. They now check for
176        it specially.
177    
178    20. pcretest is supposed to handle patterns and data of any length, by
179        extending its buffers when necessary. It was getting this wrong when the
180        buffer for a data line had to be extended.
181    
182    21. Added PCRE_NEWLINE_ANYCRLF which is like ANY, but matches only CR, LF, or
183        CRLF as a newline sequence.
184    
185    22. Code for handling Unicode properties in pcre_dfa_exec() wasn't being cut
186        out by #ifdef SUPPORT_UCP. This did no harm, as it could never be used, but
187        I have nevertheless tidied it up.
188    
189    23. Added some casts to kill warnings from HP-UX ia64 compiler.
190    
191    24. Added a man page for pcre-config.
192    
193    
194  Version 7.0 19-Dec-06  Version 7.0 19-Dec-06
195  ---------------------  ---------------------

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