1<html> 2<head> 3<title>pcre_study specification</title> 4</head> 5<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB"> 6<h1>pcre_study man page</h1> 7<p> 8Return to the <a href="index.html">PCRE index page</a>. 9</p> 10<p> 11This page is part of the PCRE HTML documentation. It was generated automatically 12from the original man page. If there is any nonsense in it, please consult the 13man page, in case the conversion went wrong. 14<br> 15<br><b> 16SYNOPSIS 17</b><br> 18<P> 19<b>#include <pcre.h></b> 20</P> 21<P> 22<b>pcre_extra *pcre_study(const pcre *<i>code</i>, int <i>options</i>,</b> 23<b>const char **<i>errptr</i>);</b> 24</P> 25<P> 26<b>pcre16_extra *pcre16_study(const pcre16 *<i>code</i>, int <i>options</i>,</b> 27<b>const char **<i>errptr</i>);</b> 28</P> 29<br><b> 30DESCRIPTION 31</b><br> 32<P> 33This function studies a compiled pattern, to see if additional information can 34be extracted that might speed up matching. Its arguments are: 35<pre> 36 <i>code</i> A compiled regular expression 37 <i>options</i> Options for <b>pcre[16]_study()</b> 38 <i>errptr</i> Where to put an error message 39</pre> 40If the function succeeds, it returns a value that can be passed to 41<b>pcre[16]_exec()</b> or <b>pcre[16]_dfa_exec()</b> via their <i>extra</i> 42arguments. 43</P> 44<P> 45If the function returns NULL, either it could not find any additional 46information, or there was an error. You can tell the difference by looking at 47the error value. It is NULL in first case. 48</P> 49<P> 50The only option is PCRE_STUDY_JIT_COMPILE. It requests just-in-time compilation 51if possible. If PCRE has been compiled without JIT support, this option is 52ignored. See the 53<a href="pcrejit.html"><b>pcrejit</b></a> 54page for further details. 55</P> 56<P> 57There is a complete description of the PCRE native API in the 58<a href="pcreapi.html"><b>pcreapi</b></a> 59page and a description of the POSIX API in the 60<a href="pcreposix.html"><b>pcreposix</b></a> 61page. 62<p> 63Return to the <a href="index.html">PCRE index page</a>. 64</p> 65