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revision 119 by ph10, Mon Mar 12 09:29:45 2007 UTC revision 168 by ph10, Tue May 29 15:18:18 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    
40    Version 7.1 24-Apr-07
41  ---------------------  ---------------------
42    
43   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
44      that is more "standard", making use of automake and other autotools. There      that is more "standard", making use of automake and other Autotools. There
45      is some re-arrangement of the files and adjustment of comments consequent      is some re-arrangement of the files and adjustment of comments consequent
46      on this.      on this.
47    
# Line 26  Version 7.1 05-Mar-07 Line 62  Version 7.1 05-Mar-07
62      .br or .in.      .br or .in.
63    
64   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
65      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
66      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
67      Autotools (compare pcre.h, which is now distributed as pcre.h.generic).      Autotools (compare pcre.h, which is now distributed as pcre.h.generic).
68    
69   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
70      Weber: (1) pcre_internal.h was missing some function renames; (2) updated      Weber: (1) pcre_internal.h was missing some function renames; (2) updated
71      makevp.bat for the current PCRE, using the additional files !compile.txt,      makevp.bat for the current PCRE, using the additional files
72      !linklib.txt, and pcregexp.pas.      makevp_c.txt, makevp_l.txt, and pcregexp.pas.
73    
74   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
75      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 99  Version 7.1 05-Mar-07
99  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:
100    
101      (a) It was defining its arguments as char * instead of void *.      (a) It was defining its arguments as char * instead of void *.
102    
103      (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
104          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.
105    
106      The emulated memove() is provided for those environments that have neither      The emulated memove() is provided for those environments that have neither
107      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
108      is clearly not the case, as these two bugs were recently reported.      is clearly not the case, as these two bugs were recently reported.
109    
110  11. The script PrepareRelease is now distributed: it calls 132html, CleanTxt,  11. The script PrepareRelease is now distributed: it calls 132html, CleanTxt,
111      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
112      pages, and it removes trailing spaces from listed files. It also creates      pages, and it removes trailing spaces from listed files. It also creates
113      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
114      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
115      before "make dist".      before "make dist".
116    
117  12. Fixed two fairly obscure bugs concerned with quantified caseless matching  12. Fixed two fairly obscure bugs concerned with quantified caseless matching
118      with Unicode property support.      with Unicode property support.
119    
120      (a) For a maximizing quantifier, if the two different cases of the      (a) For a maximizing quantifier, if the two different cases of the
121          character were of different lengths in their UTF-8 codings (there are          character were of different lengths in their UTF-8 codings (there are
122          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
123          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
124          were both the same length.          were both the same length.
125    
126      (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
127          recursion during matching, it was not correctly preserving the data for          recursion during matching, it was not correctly preserving the data for
128          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
129          while processing a minimizing repeat. If the check also involved          while processing a minimizing repeat. If the check also involved
130          matching a wide character, but failed, corruption could cause an          matching a wide character, but failed, corruption could cause an
131          erroneous result when trying to check for a repeat of the original          erroneous result when trying to check for a repeat of the original
132          character.          character.
133    
134  13. Some tidying changes to the testing mechanism:  13. Some tidying changes to the testing mechanism:
135    
136      (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
137          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
138          values substituted by "configure". (The RunGrepTest script already did          values substituted by "configure". (The RunGrepTest script already did
139          this for UTF-8.) The configure.ac script no longer substitutes the          this for UTF-8.) The configure.ac script no longer substitutes the
140          relevant variables.          relevant variables.
141    
142      (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
143          with length and offset values. This means that the output is different          with length and offset values. This means that the output is different
144          for different internal link sizes. Test 2 is skipped for link sizes          for different internal link sizes. Test 2 is skipped for link sizes
145          other than 2 because of this, bypassing the problem. Unfortunately,          other than 2 because of this, bypassing the problem. Unfortunately,
146          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
147          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,
148          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
149          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
150          of link size.          of link size. (Test 2 will be tidied up later.)
151    
152  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
153      segmentation fault instead of giving the appropriate error message.      segmentation fault instead of returning the appropriate error message.
154    
155    15. In multiline mode when the newline sequence was set to "any", the pattern
156        ^$ would give a match between the \r and \n of a subject such as "A\r\nB".
157        This doesn't seem right; it now treats the CRLF combination as the line
158        ending, and so does not match in that case. It's only a pattern such as ^$
159        that would hit this one: something like ^ABC$ would have failed after \r
160        and then tried again after \r\n.
161    
162    16. Changed the comparison command for RunGrepTest from "diff -u" to "diff -ub"
163        in an attempt to make files that differ only in their line terminators
164        compare equal. This works on Linux.
165    
166    17. Under certain error circumstances pcregrep might try to free random memory
167        as it exited. This is now fixed, thanks to valgrind.
168    
169    19. In pcretest, if the pattern /(?m)^$/g<any> was matched against the string
170        "abc\r\n\r\n", it found an unwanted second match after the second \r. This
171        was because its rules for how to advance for /g after matching an empty
172        string at the end of a line did not allow for this case. They now check for
173        it specially.
174    
175    20. pcretest is supposed to handle patterns and data of any length, by
176        extending its buffers when necessary. It was getting this wrong when the
177        buffer for a data line had to be extended.
178    
179    21. Added PCRE_NEWLINE_ANYCRLF which is like ANY, but matches only CR, LF, or
180        CRLF as a newline sequence.
181    
182    22. Code for handling Unicode properties in pcre_dfa_exec() wasn't being cut
183        out by #ifdef SUPPORT_UCP. This did no harm, as it could never be used, but
184        I have nevertheless tidied it up.
185    
186    23. Added some casts to kill warnings from HP-UX ia64 compiler.
187    
188    24. Added a man page for pcre-config.
189    
190    
191  Version 7.0 19-Dec-06  Version 7.0 19-Dec-06
192  ---------------------  ---------------------

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