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revision 236 by ph10, Tue Sep 11 12:57:06 2007 UTC revision 286 by ph10, Mon Dec 17 14:46:11 2007 UTC
# Line 1  Line 1 
1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 7.4 10-Sep-07  Version 7.5 12-Nov-07
5    ---------------------
6    
7    1.  Applied a patch from Craig: "This patch makes it possible to 'ignore'
8        values in parens when parsing an RE using the C++ wrapper."
9    
10    2.  Negative specials like \S did not work in character classes in UTF-8 mode.
11        Characters greater than 255 were excluded from the class instead of being
12        included.
13    
14    3.  The same bug as (2) above applied to negated POSIX classes such as
15        [:^space:].
16    
17    4.  PCRECPP_STATIC was referenced in pcrecpp_internal.h, but nowhere was it
18        defined or documented. It seems to have been a typo for PCRE_STATIC, so
19        I have changed it.
20    
21    5.  The construct (?&) was not diagnosed as a syntax error (it referenced the
22        first named subpattern) and a construct such as (?&a) would reference the
23        first named subpattern whose name started with "a" (in other words, the
24        length check was missing). Both these problems are fixed. "Subpattern name
25        expected" is now given for (?&) (a zero-length name), and this patch also
26        makes it give the same error for \k'' (previously it complained that that
27        was a reference to a non-existent subpattern).
28    
29    6.  The erroneous patterns (?+-a) and (?-+a) give different error messages;
30        this is right because (?- can be followed by option settings as well as by
31        digits. I have, however, made the messages clearer.
32    
33    7.  Patterns such as (?(1)a|b) (a pattern that contains fewer subpatterns
34        than the number used in the conditional) now cause a compile-time error.
35        This is actually not compatible with Perl, which accepts such patterns, but
36        treats the conditional as always being FALSE (as PCRE used to), but it
37        seems to me that giving a diagnostic is better.
38    
39    8.  Change "alphameric" to the more common word "alphanumeric" in comments
40        and messages.
41    
42    9.  Fix two occurrences of "backslash" in comments that should have been
43        "backspace".
44    
45    10. Remove two redundant lines of code that can never be obeyed (their function
46        was moved elsewhere).
47    
48    11. The program that makes PCRE's Unicode character property table had a bug
49        which caused it to generate incorrect table entries for sequences of
50        characters that have the same character type, but are in different scripts.
51        It amalgamated them into a single range, with the script of the first of
52        them. In other words, some characters were in the wrong script. There were
53        thirteen such cases, affecting characters in the following ranges:
54    
55          U+002b0 - U+002c1
56          U+0060c - U+0060d
57          U+0061e - U+00612
58          U+0064b - U+0065e
59          U+0074d - U+0076d
60          U+01800 - U+01805
61          U+01d00 - U+01d77
62          U+01d9b - U+01dbf
63          U+0200b - U+0200f
64          U+030fc - U+030fe
65          U+03260 - U+0327f
66          U+0fb46 - U+0fbb1
67          U+10450 - U+1049d
68    
69    12. The -o option (show only the matching part of a line) for pcregrep was not
70        compatible with GNU grep in that, if there was more than one match in a
71        line, it showed only the first of them. It now behaves in the same way as
72        GNU grep.
73    
74    13. If the -o and -v options were combined for pcregrep, it printed a blank
75        line for every non-matching line. GNU grep prints nothing, and pcregrep now
76        does the same. The return code can be used to tell if there were any
77        non-matching lines.
78    
79    14. The pattern (?=something)(?R) was not being diagnosed as a potentially
80        infinitely looping recursion. The bug was that positive lookaheads were not
81        being skipped when checking for a possible empty match (negative lookaheads
82        and both kinds of lookbehind were skipped).
83    
84    15. Fixed two typos in the Windows-only code in pcregrep.c, and moved the
85        inclusion of <windows.h> to before rather than after the definition of
86        INVALID_FILE_ATTRIBUTES (patch from David Byron).
87    
88    16. Specifying a possessive quantifier with a specific limit for a Unicode
89        character property caused pcre_compile() to compile bad code, which led at
90        runtime to PCRE_ERROR_INTERNAL (-14). Examples of patterns that caused this
91        are: /\p{Zl}{2,3}+/8 and /\p{Cc}{2}+/8. It was the possessive "+" that
92        caused the error; without that there was no problem.
93    
94    17. Added --enable-pcregrep-libz and --enable-pcregrep-libbz2.
95    
96    
97    Version 7.4 21-Sep-07
98  ---------------------  ---------------------
99    
100  1.  Change 7.3/28 was implemented for classes by looking at the bitmap. This  1.  Change 7.3/28 was implemented for classes by looking at the bitmap. This
# Line 25  Version 7.4 10-Sep-07 Line 118  Version 7.4 10-Sep-07
118    
119  4.  Added options (at build time, compile time, exec time) to change \R from  4.  Added options (at build time, compile time, exec time) to change \R from
120      matching any Unicode line ending sequence to just matching CR, LF, or CRLF.      matching any Unicode line ending sequence to just matching CR, LF, or CRLF.
   
 5.  doc/pcresyntax.html was missing from the distribution.  
121    
122  6.  Put back the definition of PCRE_ERROR_NULLWSLIMIT, for backward  5.  doc/pcresyntax.html was missing from the distribution.
123    
124    6.  Put back the definition of PCRE_ERROR_NULLWSLIMIT, for backward
125      compatibility, even though it is no longer used.      compatibility, even though it is no longer used.
126    
127  7.  Added macro for snprintf to pcrecpp_unittest.cc and also for strtoll and  7.  Added macro for snprintf to pcrecpp_unittest.cc and also for strtoll and
128      strtoull to pcrecpp.cc to select the available functions in WIN32 (where      strtoull to pcrecpp.cc to select the available functions in WIN32 when the
129      different names are used).      windows.h file is present (where different names are used). [This was
130        reversed later after testing - see 16 below.]
131  8.  Changed all #include <config.h> to #include "config.h". There were also  
132    8.  Changed all #include <config.h> to #include "config.h". There were also
133      some further <pcre.h> cases that I changed to "pcre.h".      some further <pcre.h> cases that I changed to "pcre.h".
134    
135    9.  When pcregrep was used with the --colour option, it missed the line ending
136        sequence off the lines that it output.
137    
138    10. It was pointed out to me that arrays of string pointers cause lots of
139        relocations when a shared library is dynamically loaded. A technique of
140        using a single long string with a table of offsets can drastically reduce
141        these. I have refactored PCRE in four places to do this. The result is
142        dramatic:
143    
144          Originally:                          290
145          After changing UCP table:            187
146          After changing error message table:   43
147          After changing table of "verbs"       36
148          After changing table of Posix names   22
149    
150        Thanks to the folks working on Gregex for glib for this insight.
151    
152    11. --disable-stack-for-recursion caused compiling to fail unless -enable-
153        unicode-properties was also set.
154    
155    12. Updated the tests so that they work when \R is defaulted to ANYCRLF.
156    
157    13. Added checks for ANY and ANYCRLF to pcrecpp.cc where it previously
158        checked only for CRLF.
159    
160    14. Added casts to pcretest.c to avoid compiler warnings.
161    
162    15. Added Craig's patch to various pcrecpp modules to avoid compiler warnings.
163    
164    16. Added Craig's patch to remove the WINDOWS_H tests, that were not working,
165        and instead check for _strtoi64 explicitly, and avoid the use of snprintf()
166        entirely. This removes changes made in 7 above.
167    
168    17. The CMake files have been updated, and there is now more information about
169        building with CMake in the NON-UNIX-USE document.
170    
171    
172  Version 7.3 28-Aug-07  Version 7.3 28-Aug-07
173  ---------------------  ---------------------

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