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NAME | SYNOPSIS | DESCRIPTION | COLOPHON |
PCRE_STUDY(3) Library Functions Manual PCRE_STUDY(3)
PCRE - Perl-compatible regular expressions
#include <pcre.h>
pcre_extra *pcre_study(const pcre *code, int options,
const char **errptr);
pcre16_extra *pcre16_study(const pcre16 *code, int options,
const char **errptr);
pcre32_extra *pcre32_study(const pcre32 *code, int options,
const char **errptr);
This function studies a compiled pattern, to see if additional
information can be extracted that might speed up matching. Its
arguments are:
code A compiled regular expression
options Options for pcre[16|32]_study()
errptr Where to put an error message
If the function succeeds, it returns a value that can be passed to
pcre[16|32]_exec() or pcre[16|32]_dfa_exec() via their extra
arguments.
If the function returns NULL, either it could not find any additional
information, or there was an error. You can tell the difference by
looking at the error value. It is NULL in first case.
The only option is PCRE_STUDY_JIT_COMPILE. It requests just-in-time
compilation if possible. If PCRE has been compiled without JIT
support, this option is ignored. See the pcrejit page for further
details.
There is a complete description of the PCRE native API in the pcreapi
page and a description of the POSIX API in the pcreposix page.
This page is part of the PCRE (Perl Compatible Regular Expressions)
project. Information about the project can be found at
⟨http://www.pcre.org/⟩. If you have a bug report for this manual
page, see ⟨http://bugs.exim.org/enter_bug.cgi?product=PCRE⟩. This
page was obtained from the tarball pcre-8.40.tar.gz fetched from
⟨ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/⟩ on
2017-07-05. If you discover any rendering problems in this HTML ver‐
sion of the page, or you believe there is a better or more up-to-date
source for the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original man‐
ual page), send a mail to man-pages@man7.org
PCRE 8.30 24 June 2012 PCRE_STUDY(3)