version 1.1, 2012/02/21 23:05:52
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version 1.1.1.2, 2012/02/21 23:50:25
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Line 7 PCRE - Perl-compatible regular expressions
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Line 7 PCRE - Perl-compatible regular expressions
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There are some size limitations in PCRE but it is hoped that they will never in |
There are some size limitations in PCRE but it is hoped that they will never in |
practice be relevant. |
practice be relevant. |
.P |
.P |
The maximum length of a compiled pattern is 65539 (sic) bytes if PCRE is | The maximum length of a compiled pattern is approximately 64K data units (bytes |
compiled with the default internal linkage size of 2. If you want to process | for the 8-bit library, 16-bit units for the 16-bit library) if PCRE is compiled |
| with the default internal linkage size of 2 bytes. If you want to process |
regular expressions that are truly enormous, you can compile PCRE with an |
regular expressions that are truly enormous, you can compile PCRE with an |
internal linkage size of 3 or 4 (see the \fBREADME\fP file in the source | internal linkage size of 3 or 4 (when building the 16-bit library, 3 is rounded |
distribution and the | up to 4). See the \fBREADME\fP file in the source distribution and the |
.\" HREF |
.\" HREF |
\fBpcrebuild\fP |
\fBpcrebuild\fP |
.\" |
.\" |
documentation for details). In these cases the limit is substantially larger. | documentation for details. In these cases the limit is substantially larger. |
However, the speed of execution is slower. |
However, the speed of execution is slower. |
.P |
.P |
All values in repeating quantifiers must be less than 65536. |
All values in repeating quantifiers must be less than 65536. |
Line 57 Cambridge CB2 3QH, England.
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Line 58 Cambridge CB2 3QH, England.
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.rs |
.rs |
.sp |
.sp |
.nf |
.nf |
Last updated: 30 November 2011 | Last updated: 08 January 2012 |
Copyright (c) 1997-2011 University of Cambridge. | Copyright (c) 1997-2012 University of Cambridge. |
.fi |
.fi |