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    1 <html>
    2 <head>
    3 <title>pcre_jit_exec specification</title>
    4 </head>
    5 <body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
    6 <h1>pcre_jit_exec man page</h1>
    7 <p>
    8 Return to the <a href="index.html">PCRE index page</a>.
    9 </p>
   10 <p>
   11 This page is part of the PCRE HTML documentation. It was generated automatically
   12 from the original man page. If there is any nonsense in it, please consult the
   13 man page, in case the conversion went wrong.
   14 <br>
   15 <br><b>
   16 SYNOPSIS
   17 </b><br>
   18 <P>
   19 <b>#include &#60;pcre.h&#62;</b>
   20 </P>
   21 <P>
   22 <b>int pcre_jit_exec(const pcre *<i>code</i>, const pcre_extra *<i>extra</i>,</b>
   23 <b>     const char *<i>subject</i>, int <i>length</i>, int <i>startoffset</i>,</b>
   24 <b>     int <i>options</i>, int *<i>ovector</i>, int <i>ovecsize</i>,</b>
   25 <b>     pcre_jit_stack *<i>jstack</i>);</b>
   26 <br>
   27 <br>
   28 <b>int pcre16_jit_exec(const pcre16 *<i>code</i>, const pcre16_extra *<i>extra</i>,</b>
   29 <b>     PCRE_SPTR16 <i>subject</i>, int <i>length</i>, int <i>startoffset</i>,</b>
   30 <b>     int <i>options</i>, int *<i>ovector</i>, int <i>ovecsize</i>,</b>
   31 <b>     pcre_jit_stack *<i>jstack</i>);</b>
   32 <br>
   33 <br>
   34 <b>int pcre32_jit_exec(const pcre32 *<i>code</i>, const pcre32_extra *<i>extra</i>,</b>
   35 <b>     PCRE_SPTR32 <i>subject</i>, int <i>length</i>, int <i>startoffset</i>,</b>
   36 <b>     int <i>options</i>, int *<i>ovector</i>, int <i>ovecsize</i>,</b>
   37 <b>     pcre_jit_stack *<i>jstack</i>);</b>
   38 </P>
   39 <br><b>
   40 DESCRIPTION
   41 </b><br>
   42 <P>
   43 This function matches a compiled regular expression that has been successfully
   44 studied with one of the JIT options against a given subject string, using a
   45 matching algorithm that is similar to Perl's. It is a "fast path" interface to
   46 JIT, and it bypasses some of the sanity checks that <b>pcre_exec()</b> applies.
   47 It returns offsets to captured substrings. Its arguments are:
   48 <pre>
   49   <i>code</i>         Points to the compiled pattern
   50   <i>extra</i>        Points to an associated <b>pcre[16|32]_extra</b> structure,
   51                  or is NULL
   52   <i>subject</i>      Points to the subject string
   53   <i>length</i>       Length of the subject string, in bytes
   54   <i>startoffset</i>  Offset in bytes in the subject at which to
   55                  start matching
   56   <i>options</i>      Option bits
   57   <i>ovector</i>      Points to a vector of ints for result offsets
   58   <i>ovecsize</i>     Number of elements in the vector (a multiple of 3)
   59   <i>jstack</i>       Pointer to a JIT stack
   60 </pre>
   61 The allowed options are:
   62 <pre>
   63   PCRE_NOTBOL            Subject string is not the beginning of a line
   64   PCRE_NOTEOL            Subject string is not the end of a line
   65   PCRE_NOTEMPTY          An empty string is not a valid match
   66   PCRE_NOTEMPTY_ATSTART  An empty string at the start of the subject
   67                            is not a valid match
   68   PCRE_NO_UTF16_CHECK    Do not check the subject for UTF-16
   69                            validity (only relevant if PCRE_UTF16
   70                            was set at compile time)
   71   PCRE_NO_UTF32_CHECK    Do not check the subject for UTF-32
   72                            validity (only relevant if PCRE_UTF32
   73                            was set at compile time)
   74   PCRE_NO_UTF8_CHECK     Do not check the subject for UTF-8
   75                            validity (only relevant if PCRE_UTF8
   76                            was set at compile time)
   77   PCRE_PARTIAL           ) Return PCRE_ERROR_PARTIAL for a partial
   78   PCRE_PARTIAL_SOFT      )   match if no full matches are found
   79   PCRE_PARTIAL_HARD      Return PCRE_ERROR_PARTIAL for a partial match
   80                            if that is found before a full match
   81 </pre>
   82 However, the PCRE_NO_UTF[8|16|32]_CHECK options have no effect, as this check
   83 is never applied. For details of partial matching, see the
   84 <a href="pcrepartial.html"><b>pcrepartial</b></a>
   85 page. A <b>pcre_extra</b> structure contains the following fields:
   86 <pre>
   87   <i>flags</i>            Bits indicating which fields are set
   88   <i>study_data</i>       Opaque data from <b>pcre[16|32]_study()</b>
   89   <i>match_limit</i>      Limit on internal resource use
   90   <i>match_limit_recursion</i>  Limit on internal recursion depth
   91   <i>callout_data</i>     Opaque data passed back to callouts
   92   <i>tables</i>           Points to character tables or is NULL
   93   <i>mark</i>             For passing back a *MARK pointer
   94   <i>executable_jit</i>   Opaque data from JIT compilation
   95 </pre>
   96 The flag bits are PCRE_EXTRA_STUDY_DATA, PCRE_EXTRA_MATCH_LIMIT,
   97 PCRE_EXTRA_MATCH_LIMIT_RECURSION, PCRE_EXTRA_CALLOUT_DATA,
   98 PCRE_EXTRA_TABLES, PCRE_EXTRA_MARK and PCRE_EXTRA_EXECUTABLE_JIT.
   99 </P>
  100 <P>
  101 There is a complete description of the PCRE native API in the
  102 <a href="pcreapi.html"><b>pcreapi</b></a>
  103 page and a description of the JIT API in the
  104 <a href="pcrejit.html"><b>pcrejit</b></a>
  105 page.
  106 <p>
  107 Return to the <a href="index.html">PCRE index page</a>.
  108 </p>