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<html> |
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<title>pcre_study specification</title> |
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<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB"> |
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<h1>pcre_study man page</h1> |
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<p> |
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Return to the <a href="index.html">PCRE index page</a>. |
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</p> |
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<p> |
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This page is part of the PCRE HTML documentation. It was generated automatically |
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from the original man page. If there is any nonsense in it, please consult the |
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man page, in case the conversion went wrong. |
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<br> |
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<br><b> |
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SYNOPSIS |
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</b><br> |
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<b>#include <pcre.h></b> |
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</P> |
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<P> |
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<b>pcre_extra *pcre_study(const pcre *<i>code</i>, int <i>options</i>,</b> |
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<b>const char **<i>errptr</i>);</b> |
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</P> |
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<P> |
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<b>pcre16_extra *pcre16_study(const pcre16 *<i>code</i>, int <i>options</i>,</b> |
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<b>const char **<i>errptr</i>);</b> |
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</P> |
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<P> |
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<b>pcre32_extra *pcre32_study(const pcre32 *<i>code</i>, int <i>options</i>,</b> |
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<b>const char **<i>errptr</i>);</b> |
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</P> |
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<br><b> |
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DESCRIPTION |
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</b><br> |
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This function studies a compiled pattern, to see if additional information can |
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be extracted that might speed up matching. Its arguments are: |
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<pre> |
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<i>code</i> A compiled regular expression |
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<i>options</i> Options for <b>pcre[16|32]_study()</b> |
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<i>errptr</i> Where to put an error message |
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</pre> |
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If the function succeeds, it returns a value that can be passed to |
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<b>pcre[16|32]_exec()</b> or <b>pcre[16|32]_dfa_exec()</b> via their <i>extra</i> |
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arguments. |
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</P> |
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<P> |
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If the function returns NULL, either it could not find any additional |
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information, or there was an error. You can tell the difference by looking at |
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the error value. It is NULL in first case. |
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</P> |
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<P> |
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The only option is PCRE_STUDY_JIT_COMPILE. It requests just-in-time compilation |
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if possible. If PCRE has been compiled without JIT support, this option is |
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ignored. See the |
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<a href="pcrejit.html"><b>pcrejit</b></a> |
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page for further details. |
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</P> |
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<P> |
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There is a complete description of the PCRE native API in the |
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<a href="pcreapi.html"><b>pcreapi</b></a> |
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page and a description of the POSIX API in the |
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<a href="pcreposix.html"><b>pcreposix</b></a> |
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page. |
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<p> |
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Return to the <a href="index.html">PCRE index page</a>. |
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</p> |
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