Annotation of embedaddon/pcre/doc/html/pcre_dfa_exec.html, revision 1.1.1.3
1.1 misho 1: <html>
2: <head>
3: <title>pcre_dfa_exec specification</title>
4: </head>
5: <body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
6: <h1>pcre_dfa_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_dfa_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>int *<i>workspace</i>, int <i>wscount</i>);</b>
26: </P>
1.1.1.2 misho 27: <P>
28: <b>int pcre16_dfa_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>int *<i>workspace</i>, int <i>wscount</i>);</b>
32: </P>
1.1.1.3 ! misho 33: <P>
! 34: <b>int pcre32_dfa_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>int *<i>workspace</i>, int <i>wscount</i>);</b>
! 38: </P>
1.1 misho 39: <br><b>
40: DESCRIPTION
41: </b><br>
42: <P>
43: This function matches a compiled regular expression against a given subject
44: string, using an alternative matching algorithm that scans the subject string
45: just once (<i>not</i> Perl-compatible). Note that the main, Perl-compatible,
1.1.1.3 ! misho 46: matching function is <b>pcre[16|32]_exec()</b>. The arguments for this function
1.1.1.2 misho 47: are:
1.1 misho 48: <pre>
49: <i>code</i> Points to the compiled pattern
1.1.1.3 ! misho 50: <i>extra</i> Points to an associated <b>pcre[16|32]_extra</b> structure,
1.1 misho 51: or is NULL
52: <i>subject</i> Points to the subject string
1.1.1.3 ! misho 53: <i>length</i> Length of the subject string
! 54: <i>startoffset</i> Offset in the subject at which to start matching
1.1 misho 55: <i>options</i> Option bits
56: <i>ovector</i> Points to a vector of ints for result offsets
57: <i>ovecsize</i> Number of elements in the vector
58: <i>workspace</i> Points to a vector of ints used as working space
59: <i>wscount</i> Number of elements in the vector
60: </pre>
1.1.1.3 ! misho 61: The units for <i>length</i> and <i>startoffset</i> are bytes for
! 62: <b>pcre_exec()</b>, 16-bit data items for <b>pcre16_exec()</b>, and 32-bit items
! 63: for <b>pcre32_exec()</b>. The options are:
1.1 misho 64: <pre>
65: PCRE_ANCHORED Match only at the first position
66: PCRE_BSR_ANYCRLF \R matches only CR, LF, or CRLF
67: PCRE_BSR_UNICODE \R matches all Unicode line endings
68: PCRE_NEWLINE_ANY Recognize any Unicode newline sequence
69: PCRE_NEWLINE_ANYCRLF Recognize CR, LF, & CRLF as newline sequences
70: PCRE_NEWLINE_CR Recognize CR as the only newline sequence
71: PCRE_NEWLINE_CRLF Recognize CRLF as the only newline sequence
72: PCRE_NEWLINE_LF Recognize LF as the only newline sequence
73: PCRE_NOTBOL Subject is not the beginning of a line
74: PCRE_NOTEOL Subject is not the end of a line
75: PCRE_NOTEMPTY An empty string is not a valid match
76: PCRE_NOTEMPTY_ATSTART An empty string at the start of the subject
77: is not a valid match
78: PCRE_NO_START_OPTIMIZE Do not do "start-match" optimizations
1.1.1.2 misho 79: PCRE_NO_UTF16_CHECK Do not check the subject for UTF-16
80: validity (only relevant if PCRE_UTF16
81: was set at compile time)
1.1.1.3 ! misho 82: PCRE_NO_UTF32_CHECK Do not check the subject for UTF-32
! 83: validity (only relevant if PCRE_UTF32
! 84: was set at compile time)
1.1 misho 85: PCRE_NO_UTF8_CHECK Do not check the subject for UTF-8
86: validity (only relevant if PCRE_UTF8
87: was set at compile time)
88: PCRE_PARTIAL ) Return PCRE_ERROR_PARTIAL for a partial
89: PCRE_PARTIAL_SOFT ) match if no full matches are found
90: PCRE_PARTIAL_HARD Return PCRE_ERROR_PARTIAL for a partial match
91: even if there is a full match as well
92: PCRE_DFA_SHORTEST Return only the shortest match
93: PCRE_DFA_RESTART Restart after a partial match
94: </pre>
95: There are restrictions on what may appear in a pattern when using this matching
96: function. Details are given in the
97: <a href="pcrematching.html"><b>pcrematching</b></a>
98: documentation. For details of partial matching, see the
99: <a href="pcrepartial.html"><b>pcrepartial</b></a>
100: page.
101: </P>
102: <P>
1.1.1.3 ! misho 103: A <b>pcre[16|32]_extra</b> structure contains the following fields:
1.1 misho 104: <pre>
105: <i>flags</i> Bits indicating which fields are set
1.1.1.3 ! misho 106: <i>study_data</i> Opaque data from <b>pcre[16|32]_study()</b>
1.1 misho 107: <i>match_limit</i> Limit on internal resource use
108: <i>match_limit_recursion</i> Limit on internal recursion depth
109: <i>callout_data</i> Opaque data passed back to callouts
110: <i>tables</i> Points to character tables or is NULL
111: <i>mark</i> For passing back a *MARK pointer
112: <i>executable_jit</i> Opaque data from JIT compilation
113: </pre>
114: The flag bits are PCRE_EXTRA_STUDY_DATA, PCRE_EXTRA_MATCH_LIMIT,
115: PCRE_EXTRA_MATCH_LIMIT_RECURSION, PCRE_EXTRA_CALLOUT_DATA,
116: PCRE_EXTRA_TABLES, PCRE_EXTRA_MARK and PCRE_EXTRA_EXECUTABLE_JIT. For this
117: matching function, the <i>match_limit</i> and <i>match_limit_recursion</i> fields
118: are not used, and must not be set. The PCRE_EXTRA_EXECUTABLE_JIT flag and
119: the corresponding variable are ignored.
120: </P>
121: <P>
122: There is a complete description of the PCRE native API in the
123: <a href="pcreapi.html"><b>pcreapi</b></a>
124: page and a description of the POSIX API in the
125: <a href="pcreposix.html"><b>pcreposix</b></a>
126: page.
127: <p>
128: Return to the <a href="index.html">PCRE index page</a>.
129: </p>
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