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April, 26th. 2006:
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PCRE_STUDY
Section: C Library Functions (3) Updated: 24 June 2012 Index
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NAME
PCRE - Perl-compatible regular expressions
SYNOPSIS
#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);
DESCRIPTION
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.
Index
- NAME
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- SYNOPSIS
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- DESCRIPTION
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