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

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Revision 1339 - (show annotations)
Fri Jun 14 09:09:28 2013 UTC (8 years, 3 months ago) by ph10
File size: 5317 byte(s)
Update man pages to avoid the use of .ti (which causes difficulties for some 
translation software).
1 .TH PCRE_DFA_EXEC 3 "12 May 2013" "PCRE 8.33"
3 PCRE - Perl-compatible regular expressions
5 .rs
6 .sp
7 .B #include <pcre.h>
8 .PP
9 .nf
10 .B int pcre_dfa_exec(const pcre *\fIcode\fP, "const pcre_extra *\fIextra\fP,"
11 .B " const char *\fIsubject\fP, int \fIlength\fP, int \fIstartoffset\fP,"
12 .B " int \fIoptions\fP, int *\fIovector\fP, int \fIovecsize\fP,"
13 .B " int *\fIworkspace\fP, int \fIwscount\fP);"
14 .sp
15 .B int pcre16_dfa_exec(const pcre16 *\fIcode\fP, "const pcre16_extra *\fIextra\fP,"
16 .B " PCRE_SPTR16 \fIsubject\fP, int \fIlength\fP, int \fIstartoffset\fP,"
17 .B " int \fIoptions\fP, int *\fIovector\fP, int \fIovecsize\fP,"
18 .B " int *\fIworkspace\fP, int \fIwscount\fP);"
19 .sp
20 .B int pcre32_dfa_exec(const pcre32 *\fIcode\fP, "const pcre32_extra *\fIextra\fP,"
21 .B " PCRE_SPTR32 \fIsubject\fP, int \fIlength\fP, int \fIstartoffset\fP,"
22 .B " int \fIoptions\fP, int *\fIovector\fP, int \fIovecsize\fP,"
23 .B " int *\fIworkspace\fP, int \fIwscount\fP);"
24 .fi
25 .
27 .rs
28 .sp
29 This function matches a compiled regular expression against a given subject
30 string, using an alternative matching algorithm that scans the subject string
31 just once (\fInot\fP Perl-compatible). Note that the main, Perl-compatible,
32 matching function is \fBpcre[16|32]_exec()\fP. The arguments for this function
33 are:
34 .sp
35 \fIcode\fP Points to the compiled pattern
36 \fIextra\fP Points to an associated \fBpcre[16|32]_extra\fP structure,
37 or is NULL
38 \fIsubject\fP Points to the subject string
39 \fIlength\fP Length of the subject string
40 \fIstartoffset\fP Offset in the subject at which to start matching
41 \fIoptions\fP Option bits
42 \fIovector\fP Points to a vector of ints for result offsets
43 \fIovecsize\fP Number of elements in the vector
44 \fIworkspace\fP Points to a vector of ints used as working space
45 \fIwscount\fP Number of elements in the vector
46 .sp
47 The units for \fIlength\fP and \fIstartoffset\fP are bytes for
48 \fBpcre_exec()\fP, 16-bit data items for \fBpcre16_exec()\fP, and 32-bit items
49 for \fBpcre32_exec()\fP. The options are:
50 .sp
51 PCRE_ANCHORED Match only at the first position
52 PCRE_BSR_ANYCRLF \eR matches only CR, LF, or CRLF
53 PCRE_BSR_UNICODE \eR matches all Unicode line endings
54 PCRE_NEWLINE_ANY Recognize any Unicode newline sequence
55 PCRE_NEWLINE_ANYCRLF Recognize CR, LF, & CRLF as newline sequences
56 PCRE_NEWLINE_CR Recognize CR as the only newline sequence
57 PCRE_NEWLINE_CRLF Recognize CRLF as the only newline sequence
58 PCRE_NEWLINE_LF Recognize LF as the only newline sequence
59 PCRE_NOTBOL Subject is not the beginning of a line
60 PCRE_NOTEOL Subject is not the end of a line
61 PCRE_NOTEMPTY An empty string is not a valid match
62 PCRE_NOTEMPTY_ATSTART An empty string at the start of the subject
63 is not a valid match
64 PCRE_NO_START_OPTIMIZE Do not do "start-match" optimizations
65 PCRE_NO_UTF16_CHECK Do not check the subject for UTF-16
66 validity (only relevant if PCRE_UTF16
67 was set at compile time)
68 PCRE_NO_UTF32_CHECK Do not check the subject for UTF-32
69 validity (only relevant if PCRE_UTF32
70 was set at compile time)
71 PCRE_NO_UTF8_CHECK Do not check the subject for UTF-8
72 validity (only relevant if PCRE_UTF8
73 was set at compile time)
74 PCRE_PARTIAL ) Return PCRE_ERROR_PARTIAL for a partial
75 PCRE_PARTIAL_SOFT ) match if no full matches are found
76 PCRE_PARTIAL_HARD Return PCRE_ERROR_PARTIAL for a partial match
77 even if there is a full match as well
78 PCRE_DFA_SHORTEST Return only the shortest match
79 PCRE_DFA_RESTART Restart after a partial match
80 .sp
81 There are restrictions on what may appear in a pattern when using this matching
82 function. Details are given in the
83 .\" HREF
84 \fBpcrematching\fP
85 .\"
86 documentation. For details of partial matching, see the
87 .\" HREF
88 \fBpcrepartial\fP
89 .\"
90 page.
91 .P
92 A \fBpcre[16|32]_extra\fP structure contains the following fields:
93 .sp
94 \fIflags\fP Bits indicating which fields are set
95 \fIstudy_data\fP Opaque data from \fBpcre[16|32]_study()\fP
96 \fImatch_limit\fP Limit on internal resource use
97 \fImatch_limit_recursion\fP Limit on internal recursion depth
98 \fIcallout_data\fP Opaque data passed back to callouts
99 \fItables\fP Points to character tables or is NULL
100 \fImark\fP For passing back a *MARK pointer
101 \fIexecutable_jit\fP Opaque data from JIT compilation
102 .sp
106 matching function, the \fImatch_limit\fP and \fImatch_limit_recursion\fP fields
107 are not used, and must not be set. The PCRE_EXTRA_EXECUTABLE_JIT flag and
108 the corresponding variable are ignored.
109 .P
110 There is a complete description of the PCRE native API in the
111 .\" HREF
112 \fBpcreapi\fP
113 .\"
114 page and a description of the POSIX API in the
115 .\" HREF
116 \fBpcreposix\fP
117 .\"
118 page.


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