Fix *MARK length check in UTF mode (it was checking characters, not code
units).
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Philip.Hazel
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2821076981
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12
ChangeLog
12
ChangeLog
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@ -40,6 +40,15 @@ parenthesis item, not the length of the whole group. A length of zero is now
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given only for a callout at the end of the pattern. Automatic callouts are no
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longer inserted before and after explicit callouts in the pattern.
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Some bugs in the refactored code were subsequently fixed before release:
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(a) An overall recursion such as (?0) inside a lookbehind assertion was not
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being diagnosed as an error.
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(b) In utf mode, the length of a *MARK (or other verb) name was being checked
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in characters instead of code units, which could lead to bad code being
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compiled, leading to unpredictable behaviour.
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4. Back references are now permitted in lookbehind assertions when there are
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no duplicated group numbers (that is, (?| has not been used), and, if the
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reference is by name, there is only one group of that name. The referenced
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@ -96,9 +105,6 @@ only when PCRE2_NO_START_OPTIMIZE was *not* set:
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16. The "offset" modifier in pcre2test was not being ignored (as documented)
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when the POSIX API was in use.
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17. An overall recursion such as (?0) inside a lookbehind assertion was not
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being diagnosed as an error.
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Version 10.22 29-July-2016
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--------------------------
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@ -1,4 +1,4 @@
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.TH PCRE2LIMITS 3 "29 September 2016" "PCRE2 10.23"
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.TH PCRE2LIMITS 3 "26 October 2016" "PCRE2 10.23"
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.SH NAME
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PCRE2 - Perl-compatible regular expressions (revised API)
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.SH "SIZE AND OTHER LIMITATIONS"
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@ -55,7 +55,8 @@ The maximum length of name for a named subpattern is 32 code units, and the
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maximum number of named subpatterns is 10000.
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.P
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The maximum length of a name in a (*MARK), (*PRUNE), (*SKIP), or (*THEN) verb
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is 255 for the 8-bit library and 65535 for the 16-bit and 32-bit libraries.
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is 255 code units for the 8-bit library and 65535 code units for the 16-bit and
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32-bit libraries.
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.P
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The maximum length of a string argument to a callout is the largest number a
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32-bit unsigned integer can hold.
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@ -75,6 +76,6 @@ Cambridge, England.
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.rs
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.sp
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.nf
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Last updated: 29 September 2016
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Last updated: 26 October 2016
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Copyright (c) 1997-2016 University of Cambridge.
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.fi
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@ -2161,6 +2161,7 @@ BOOL negate_class;
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BOOL okquantifier = FALSE;
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PCRE2_SPTR name;
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PCRE2_SPTR ptrend = cb->end_pattern;
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PCRE2_SPTR verbnamestart = NULL; /* Value avoids compiler warning */
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named_group *ng;
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nest_save *top_nest = NULL;
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nest_save *end_nests = (nest_save *)(cb->start_workspace + cb->workspace_size);
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@ -2248,8 +2249,10 @@ while (ptr < ptrend)
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case CHAR_RIGHT_PARENTHESIS:
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inverbname = FALSE;
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/* This is the length in characters */
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verbnamelength = (PCRE2_SIZE)(parsed_pattern - verblengthptr - 1);
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if (verbnamelength > MAX_MARK)
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/* But the limit on the length is in code units */
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if (ptr - verbnamestart - 1 > MAX_MARK)
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{
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ptr--;
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errorcode = ERR76;
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@ -3149,6 +3152,7 @@ while (ptr < ptrend)
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*parsed_pattern++ = verbs[i].meta +
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((verbs[i].meta != META_MARK)? 0x00010000u:0);
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verblengthptr = parsed_pattern++;
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verbnamestart = ptr;
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inverbname = TRUE;
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}
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else /* No verb "name" argument */
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@ -454,4 +454,6 @@
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\= Expect no match
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123
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/(*:*++++++++++++''''''''''''''''''''+''+++'+++x+++++++++++++++++++++++++++++++++++(++++++++++++++++++++:++++++%++:''''''''''''''''''''''''+++++++++++++++++++++++++++++++++++++++++++++++++++++-++++++++k+++++++''''+++'+++++++++++++++++++++++''''++++++++++++':ƿ)/utf
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# End of testinput10
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@ -258,4 +258,6 @@
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/(*MARK:a\x{100}b)z/alt_verbnames
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/(*:*++++++++++++''''''''''''''''''''+''+++'+++x+++++++++++++++++++++++++++++++++++(++++++++++++++++++++:++++++%++:''''''''''''''''''''''''+++++++++++++++++++++++++++++++++++++++++++++++++++++-++++++++k+++++++''''+++'+++++++++++++++++++++++''''++++++++++++':ƿ)/
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# End of testinput9
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@ -1564,4 +1564,7 @@ Failed: error -22: UTF-8 error: isolated byte with 0x80 bit set at offset 1
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123
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No match
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/(*:*++++++++++++''''''''''''''''''''+''+++'+++x+++++++++++++++++++++++++++++++++++(++++++++++++++++++++:++++++%++:''''''''''''''''''''''''+++++++++++++++++++++++++++++++++++++++++++++++++++++-++++++++k+++++++''''+++'+++++++++++++++++++++++''''++++++++++++':ƿ)/utf
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Failed: error 176 at offset 259: name is too long in (*MARK), (*PRUNE), (*SKIP), or (*THEN)
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# End of testinput10
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@ -364,4 +364,7 @@ Failed: error 177 at offset 7: character code point value in \u.... sequence is
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/(*MARK:a\x{100}b)z/alt_verbnames
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Failed: error 134 at offset 14: character code point value in \x{} or \o{} is too large
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/(*:*++++++++++++''''''''''''''''''''+''+++'+++x+++++++++++++++++++++++++++++++++++(++++++++++++++++++++:++++++%++:''''''''''''''''''''''''+++++++++++++++++++++++++++++++++++++++++++++++++++++-++++++++k+++++++''''+++'+++++++++++++++++++++++''''++++++++++++':ƿ)/
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Failed: error 176 at offset 259: name is too long in (*MARK), (*PRUNE), (*SKIP), or (*THEN)
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# End of testinput9
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