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2: <head>
3: <title>pcre_exec specification</title>
4: </head>
5: <body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
6: <h1>pcre_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 <pcre.h></b>
20: </P>
21: <P>
22: <b>int pcre_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: </P>
26: <br><b>
27: DESCRIPTION
28: </b><br>
29: <P>
30: This function matches a compiled regular expression against a given subject
31: string, using a matching algorithm that is similar to Perl's. It returns
32: offsets to captured substrings. Its arguments are:
33: <pre>
34: <i>code</i> Points to the compiled pattern
35: <i>extra</i> Points to an associated <b>pcre_extra</b> structure,
36: or is NULL
37: <i>subject</i> Points to the subject string
38: <i>length</i> Length of the subject string, in bytes
39: <i>startoffset</i> Offset in bytes in the subject at which to
40: start matching
41: <i>options</i> Option bits
42: <i>ovector</i> Points to a vector of ints for result offsets
43: <i>ovecsize</i> Number of elements in the vector (a multiple of 3)
44: </pre>
45: The options are:
46: <pre>
47: PCRE_ANCHORED Match only at the first position
48: PCRE_BSR_ANYCRLF \R matches only CR, LF, or CRLF
49: PCRE_BSR_UNICODE \R matches all Unicode line endings
50: PCRE_NEWLINE_ANY Recognize any Unicode newline sequence
51: PCRE_NEWLINE_ANYCRLF Recognize CR, LF, & CRLF as newline sequences
52: PCRE_NEWLINE_CR Recognize CR as the only newline sequence
53: PCRE_NEWLINE_CRLF Recognize CRLF as the only newline sequence
54: PCRE_NEWLINE_LF Recognize LF as the only newline sequence
55: PCRE_NOTBOL Subject string is not the beginning of a line
56: PCRE_NOTEOL Subject string is not the end of a line
57: PCRE_NOTEMPTY An empty string is not a valid match
58: PCRE_NOTEMPTY_ATSTART An empty string at the start of the subject
59: is not a valid match
60: PCRE_NO_START_OPTIMIZE Do not do "start-match" optimizations
61: PCRE_NO_UTF8_CHECK Do not check the subject for UTF-8
62: validity (only relevant if PCRE_UTF8
63: was set at compile time)
64: PCRE_PARTIAL ) Return PCRE_ERROR_PARTIAL for a partial
65: PCRE_PARTIAL_SOFT ) match if no full matches are found
66: PCRE_PARTIAL_HARD Return PCRE_ERROR_PARTIAL for a partial match
67: if that is found before a full match
68: </pre>
69: For details of partial matching, see the
70: <a href="pcrepartial.html"><b>pcrepartial</b></a>
71: page. A <b>pcre_extra</b> structure contains the following fields:
72: <pre>
73: <i>flags</i> Bits indicating which fields are set
74: <i>study_data</i> Opaque data from <b>pcre_study()</b>
75: <i>match_limit</i> Limit on internal resource use
76: <i>match_limit_recursion</i> Limit on internal recursion depth
77: <i>callout_data</i> Opaque data passed back to callouts
78: <i>tables</i> Points to character tables or is NULL
79: <i>mark</i> For passing back a *MARK pointer
80: <i>executable_jit</i> Opaque data from JIT compilation
81: </pre>
82: The flag bits are PCRE_EXTRA_STUDY_DATA, PCRE_EXTRA_MATCH_LIMIT,
83: PCRE_EXTRA_MATCH_LIMIT_RECURSION, PCRE_EXTRA_CALLOUT_DATA,
84: PCRE_EXTRA_TABLES, PCRE_EXTRA_MARK and PCRE_EXTRA_EXECUTABLE_JIT.
85: </P>
86: <P>
87: There is a complete description of the PCRE native API in the
88: <a href="pcreapi.html"><b>pcreapi</b></a>
89: page and a description of the POSIX API in the
90: <a href="pcreposix.html"><b>pcreposix</b></a>
91: page.
92: <p>
93: Return to the <a href="index.html">PCRE index page</a>.
94: </p>
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