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revision 115 by ph10, Fri Mar 9 12:23:37 2007 UTC revision 171 by ph10, Mon Jun 4 14:28:58 2007 UTC
# Line 1  Line 1 
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        (e) \k{name} is synonymous with \k<name> and \k'name' (.NET compatible).
40    
41        (f) \g{name} is another synonym - part of Perl 5.10's unification of
42            reference syntax.
43    
44     7. Added two new calls to pcre_fullinfo(): PCRE_INFO_OKPARTIAL and
45        PCRE_INFO_JCHANGED.
46    
47     8. A pattern such as  (.*(.)?)*  caused pcre_exec() to fail by either not
48        terminating or by crashing. Diagnosed by Viktor Griph; it was in the code
49        for detecting groups that can match an empty string.
50    
51    
52    Version 7.1 24-Apr-07
53  ---------------------  ---------------------
54    
55   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
56      that is more "standard", making use of automake and other autotools. There      that is more "standard", making use of automake and other Autotools. There
57      is some re-arrangement of the files and adjustment of comments consequent      is some re-arrangement of the files and adjustment of comments consequent
58      on this.      on this.
59    
# Line 26  Version 7.1 05-Mar-07 Line 74  Version 7.1 05-Mar-07
74      .br or .in.      .br or .in.
75    
76   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
77      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
78      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
79      Autotools (compare pcre.h, which is now distributed as pcre.h.generic).      Autotools (compare pcre.h, which is now distributed as pcre.h.generic).
80    
81   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
82      Weber: (1) pcre_internal.h was missing some function renames; (2) updated      Weber: (1) pcre_internal.h was missing some function renames; (2) updated
83      makevp.bat for the current PCRE, using the additional files !compile.txt,      makevp.bat for the current PCRE, using the additional files
84      !linklib.txt, and pcregexp.pas.      makevp_c.txt, makevp_l.txt, and pcregexp.pas.
85    
86   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
87      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 60  Version 7.1 05-Mar-07 Line 108  Version 7.1 05-Mar-07
108      called when UTF-8 support is disabled. Otherwise there are problems with a      called when UTF-8 support is disabled. Otherwise there are problems with a
109      shared library.      shared library.
110    
111  10. The emulated memmove() function in pcre_internal.h (provided for those  10. Fixed two bugs in the emulated memmove() function in pcre_internal.h:
112      environments that have neither memmove() nor bcopy()) was defining its  
113      arguments as char * instead of void *.      (a) It was defining its arguments as char * instead of void *.
114    
115        (b) It was assuming that all moves were upwards in memory; this was true
116            a long time ago when I wrote it, but is no longer the case.
117    
118        The emulated memove() is provided for those environments that have neither
119        memmove() nor bcopy(). I didn't think anyone used it these days, but that
120        is clearly not the case, as these two bugs were recently reported.
121    
122  11. The script PrepareRelease is now distributed: it calls 132html, CleanTxt,  11. The script PrepareRelease is now distributed: it calls 132html, CleanTxt,
123      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
124      pages, and it removes trailing spaces from listed files. It also creates      pages, and it removes trailing spaces from listed files. It also creates
125      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
126      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
127      before "make dist".      before "make dist".
128    
129  12. Fixed two fairly obscure bugs concerned with quantified caseless matching  12. Fixed two fairly obscure bugs concerned with quantified caseless matching
130      with Unicode property support.      with Unicode property support.
131    
132      (a) For a maximizing quantifier, if the two different cases of the      (a) For a maximizing quantifier, if the two different cases of the
133          character were of different lengths in their UTF-8 codings (there are          character were of different lengths in their UTF-8 codings (there are
134          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
135          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
136          were both the same length.          were both the same length.
137    
138      (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
139          recursion during matching, it was not correctly preserving the data for          recursion during matching, it was not correctly preserving the data for
140          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
141          while processing a minimizing repeat. If the check also involved          while processing a minimizing repeat. If the check also involved
142          matching a wide character, but failed, corruption could cause an          matching a wide character, but failed, corruption could cause an
143          erroneous result when trying to check for a repeat of the original          erroneous result when trying to check for a repeat of the original
144          character.          character.
145    
146    13. Some tidying changes to the testing mechanism:
147    
148        (a) The RunTest script now detects the internal link size and whether there
149            is UTF-8 and UCP support by running ./pcretest -C instead of relying on
150            values substituted by "configure". (The RunGrepTest script already did
151            this for UTF-8.) The configure.ac script no longer substitutes the
152            relevant variables.
153    
154        (b) The debugging options /B and /D in pcretest show the compiled bytecode
155            with length and offset values. This means that the output is different
156            for different internal link sizes. Test 2 is skipped for link sizes
157            other than 2 because of this, bypassing the problem. Unfortunately,
158            there was also a test in test 3 (the locale tests) that used /B and
159            failed for link sizes other than 2. Rather than cut the whole test out,
160            I have added a new /Z option to pcretest that replaces the length and
161            offset values with spaces. This is now used to make test 3 independent
162            of link size. (Test 2 will be tidied up later.)
163    
164    14. If erroroffset was passed as NULL to pcre_compile, it provoked a
165        segmentation fault instead of returning the appropriate error message.
166    
167    15. In multiline mode when the newline sequence was set to "any", the pattern
168        ^$ would give a match between the \r and \n of a subject such as "A\r\nB".
169        This doesn't seem right; it now treats the CRLF combination as the line
170        ending, and so does not match in that case. It's only a pattern such as ^$
171        that would hit this one: something like ^ABC$ would have failed after \r
172        and then tried again after \r\n.
173    
174    16. Changed the comparison command for RunGrepTest from "diff -u" to "diff -ub"
175        in an attempt to make files that differ only in their line terminators
176        compare equal. This works on Linux.
177    
178    17. Under certain error circumstances pcregrep might try to free random memory
179        as it exited. This is now fixed, thanks to valgrind.
180    
181    19. In pcretest, if the pattern /(?m)^$/g<any> was matched against the string
182        "abc\r\n\r\n", it found an unwanted second match after the second \r. This
183        was because its rules for how to advance for /g after matching an empty
184        string at the end of a line did not allow for this case. They now check for
185        it specially.
186    
187    20. pcretest is supposed to handle patterns and data of any length, by
188        extending its buffers when necessary. It was getting this wrong when the
189        buffer for a data line had to be extended.
190    
191    21. Added PCRE_NEWLINE_ANYCRLF which is like ANY, but matches only CR, LF, or
192        CRLF as a newline sequence.
193    
194    22. Code for handling Unicode properties in pcre_dfa_exec() wasn't being cut
195        out by #ifdef SUPPORT_UCP. This did no harm, as it could never be used, but
196        I have nevertheless tidied it up.
197    
198    23. Added some casts to kill warnings from HP-UX ia64 compiler.
199    
200    24. Added a man page for pcre-config.
201    
202    
203  Version 7.0 19-Dec-06  Version 7.0 19-Dec-06
204  ---------------------  ---------------------

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