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diff --git a/plugins/Pcre16/docs/doc/pcrelimits.3 b/plugins/Pcre16/docs/doc/pcrelimits.3 deleted file mode 100644 index 423d6a2768..0000000000 --- a/plugins/Pcre16/docs/doc/pcrelimits.3 +++ /dev/null @@ -1,71 +0,0 @@ -.TH PCRELIMITS 3 "05 November 2013" "PCRE 8.34" -.SH NAME -PCRE - Perl-compatible regular expressions -.SH "SIZE AND OTHER LIMITATIONS" -.rs -.sp -There are some size limitations in PCRE but it is hoped that they will never in -practice be relevant. -.P -The maximum length of a compiled pattern is approximately 64K data units (bytes -for the 8-bit library, 16-bit units for the 16-bit library, and 32-bit units for -the 32-bit library) if PCRE is compiled with the default internal linkage size, -which is 2 bytes for the 8-bit and 16-bit libraries, and 4 bytes for the 32-bit -library. If you want to process regular expressions that are truly enormous, -you can compile PCRE with an internal linkage size of 3 or 4 (when building the -16-bit or 32-bit library, 3 is rounded up to 4). See the \fBREADME\fP file in -the source distribution and the -.\" HREF -\fBpcrebuild\fP -.\" -documentation for details. In these cases the limit is substantially larger. -However, the speed of execution is slower. -.P -All values in repeating quantifiers must be less than 65536. -.P -There is no limit to the number of parenthesized subpatterns, but there can be -no more than 65535 capturing subpatterns. There is, however, a limit to the -depth of nesting of parenthesized subpatterns of all kinds. This is imposed in -order to limit the amount of system stack used at compile time. The limit can -be specified when PCRE is built; the default is 250. -.P -There is a limit to the number of forward references to subsequent subpatterns -of around 200,000. Repeated forward references with fixed upper limits, for -example, (?2){0,100} when subpattern number 2 is to the right, are included in -the count. There is no limit to the number of backward references. -.P -The maximum length of name for a named subpattern is 32 characters, and the -maximum number of named subpatterns is 10000. -.P -The maximum length of a name in a (*MARK), (*PRUNE), (*SKIP), or (*THEN) verb -is 255 for the 8-bit library and 65535 for the 16-bit and 32-bit libraries. -.P -The maximum length of a subject string is the largest positive number that an -integer variable can hold. However, when using the traditional matching -function, PCRE uses recursion to handle subpatterns and indefinite repetition. -This means that the available stack space may limit the size of a subject -string that can be processed by certain patterns. For a discussion of stack -issues, see the -.\" HREF -\fBpcrestack\fP -.\" -documentation. -. -. -.SH AUTHOR -.rs -.sp -.nf -Philip Hazel -University Computing Service -Cambridge CB2 3QH, England. -.fi -. -. -.SH REVISION -.rs -.sp -.nf -Last updated: 05 November 2013 -Copyright (c) 1997-2013 University of Cambridge. -.fi |