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<h1>pcre_study man page</h1>

Return to the <a href="index.html">PCRE index page</a>.


This page is part of the PCRE HTML documentation. It was generated automatically
from the original man page. If there is any nonsense in it, please consult the
man page, in case the conversion went wrong.
 
 
SYNOPSIS
 

#include &#60;pcre.h&#62;


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:
<pre>
 code A compiled regular expression
 options Options for pcre[16|32]_study()
 errptr Where to put an error message
</pre>
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
<a href="pcrejit.html">pcrejit</a>
page for further details.


There is a complete description of the PCRE native API in the
<a href="pcreapi.html">pcreapi</a>
page and a description of the POSIX API in the
<a href="pcreposix.html">pcreposix</a>
page.

Return to the <a href="index.html">PCRE index page</a>.

MR SKB