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Contents of /code/trunk/doc/pcre_exec.3

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Revision 91 - (hide annotations) (download)
Sat Feb 24 21:41:34 2007 UTC (7 years, 2 months ago) by nigel
File size: 2584 byte(s)
Load pcre-6.7 into code/trunk.

1 nigel 79 .TH PCRE_EXEC 3
2 nigel 63 .SH NAME
3     PCRE - Perl-compatible regular expressions
4     .SH SYNOPSIS
5     .rs
6     .sp
7     .B #include <pcre.h>
8     .PP
9     .SM
10     .br
11 nigel 75 .B int pcre_exec(const pcre *\fIcode\fP, "const pcre_extra *\fIextra\fP,"
12 nigel 63 .ti +5n
13 nigel 75 .B "const char *\fIsubject\fP," int \fIlength\fP, int \fIstartoffset\fP,
14 nigel 63 .ti +5n
15 nigel 75 .B int \fIoptions\fP, int *\fIovector\fP, int \fIovecsize\fP);
16     .
17 nigel 63 .SH DESCRIPTION
18     .rs
19     .sp
20     This function matches a compiled regular expression against a given subject
21 nigel 77 string, using a matching algorithm that is similar to Perl's. It returns
22     offsets to captured substrings. Its arguments are:
23 nigel 75 .sp
24     \fIcode\fP Points to the compiled pattern
25     \fIextra\fP Points to an associated \fBpcre_extra\fP structure,
26 nigel 63 or is NULL
27 nigel 75 \fIsubject\fP Points to the subject string
28     \fIlength\fP Length of the subject string, in bytes
29     \fIstartoffset\fP Offset in bytes in the subject at which to
30 nigel 63 start matching
31 nigel 75 \fIoptions\fP Option bits
32     \fIovector\fP Points to a vector of ints for result offsets
33     \fIovecsize\fP Number of elements in the vector (a multiple of 3)
34     .sp
35 nigel 63 The options are:
36 nigel 75 .sp
37 nigel 63 PCRE_ANCHORED Match only at the first position
38 nigel 91 PCRE_NEWLINE_CR Set CR as the newline sequence
39     PCRE_NEWLINE_CRLF Set CRLF as the newline sequence
40     PCRE_NEWLINE_LF Set LF as the newline sequence
41 nigel 63 PCRE_NOTBOL Subject is not the beginning of a line
42     PCRE_NOTEOL Subject is not the end of a line
43     PCRE_NOTEMPTY An empty string is not a valid match
44 nigel 71 PCRE_NO_UTF8_CHECK Do not check the subject for UTF-8
45     validity (only relevant if PCRE_UTF8
46     was set at compile time)
47 nigel 75 PCRE_PARTIAL Return PCRE_ERROR_PARTIAL for a partial match
48     .sp
49     There are restrictions on what may appear in a pattern when partial matching is
50     requested.
51     .P
52     A \fBpcre_extra\fP structure contains the following fields:
53     .sp
54     \fIflags\fP Bits indicating which fields are set
55     \fIstudy_data\fP Opaque data from \fBpcre_study()\fP
56 nigel 87 \fImatch_limit\fP Limit on internal resource use
57     \fImatch_limit_recursion\fP Limit on internal recursion depth
58 nigel 75 \fIcallout_data\fP Opaque data passed back to callouts
59     \fItables\fP Points to character tables or is NULL
60     .sp
61     The flag bits are PCRE_EXTRA_STUDY_DATA, PCRE_EXTRA_MATCH_LIMIT,
62 nigel 87 PCRE_EXTRA_MATCH_LIMIT_RECURSION, PCRE_EXTRA_CALLOUT_DATA, and
63     PCRE_EXTRA_TABLES.
64 nigel 75 .P
65     There is a complete description of the PCRE native API in the
66 nigel 63 .\" HREF
67 nigel 75 \fBpcreapi\fP
68 nigel 63 .\"
69 nigel 75 page and a description of the POSIX API in the
70     .\" HREF
71     \fBpcreposix\fP
72     .\"
73 nigel 63 page.

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