119 lines
5.2 KiB
Groff
119 lines
5.2 KiB
Groff
.TH PCRE_DFA_EXEC 3 "12 May 2013" "PCRE 8.33"
|
|
.SH NAME
|
|
PCRE - Perl-compatible regular expressions
|
|
.SH SYNOPSIS
|
|
.rs
|
|
.sp
|
|
.B #include <pcre.h>
|
|
.PP
|
|
.nf
|
|
.B int pcre_dfa_exec(const pcre *\fIcode\fP, "const pcre_extra *\fIextra\fP,"
|
|
.B " const char *\fIsubject\fP, int \fIlength\fP, int \fIstartoffset\fP,"
|
|
.B " int \fIoptions\fP, int *\fIovector\fP, int \fIovecsize\fP,"
|
|
.B " int *\fIworkspace\fP, int \fIwscount\fP);"
|
|
.sp
|
|
.B int pcre16_dfa_exec(const pcre16 *\fIcode\fP, "const pcre16_extra *\fIextra\fP,"
|
|
.B " PCRE_SPTR16 \fIsubject\fP, int \fIlength\fP, int \fIstartoffset\fP,"
|
|
.B " int \fIoptions\fP, int *\fIovector\fP, int \fIovecsize\fP,"
|
|
.B " int *\fIworkspace\fP, int \fIwscount\fP);"
|
|
.sp
|
|
.B int pcre32_dfa_exec(const pcre32 *\fIcode\fP, "const pcre32_extra *\fIextra\fP,"
|
|
.B " PCRE_SPTR32 \fIsubject\fP, int \fIlength\fP, int \fIstartoffset\fP,"
|
|
.B " int \fIoptions\fP, int *\fIovector\fP, int \fIovecsize\fP,"
|
|
.B " int *\fIworkspace\fP, int \fIwscount\fP);"
|
|
.fi
|
|
.
|
|
.SH DESCRIPTION
|
|
.rs
|
|
.sp
|
|
This function matches a compiled regular expression against a given subject
|
|
string, using an alternative matching algorithm that scans the subject string
|
|
just once (\fInot\fP Perl-compatible). Note that the main, Perl-compatible,
|
|
matching function is \fBpcre[16|32]_exec()\fP. The arguments for this function
|
|
are:
|
|
.sp
|
|
\fIcode\fP Points to the compiled pattern
|
|
\fIextra\fP Points to an associated \fBpcre[16|32]_extra\fP structure,
|
|
or is NULL
|
|
\fIsubject\fP Points to the subject string
|
|
\fIlength\fP Length of the subject string
|
|
\fIstartoffset\fP Offset in the subject at which to start matching
|
|
\fIoptions\fP Option bits
|
|
\fIovector\fP Points to a vector of ints for result offsets
|
|
\fIovecsize\fP Number of elements in the vector
|
|
\fIworkspace\fP Points to a vector of ints used as working space
|
|
\fIwscount\fP Number of elements in the vector
|
|
.sp
|
|
The units for \fIlength\fP and \fIstartoffset\fP are bytes for
|
|
\fBpcre_exec()\fP, 16-bit data items for \fBpcre16_exec()\fP, and 32-bit items
|
|
for \fBpcre32_exec()\fP. The options are:
|
|
.sp
|
|
PCRE_ANCHORED Match only at the first position
|
|
PCRE_BSR_ANYCRLF \eR matches only CR, LF, or CRLF
|
|
PCRE_BSR_UNICODE \eR matches all Unicode line endings
|
|
PCRE_NEWLINE_ANY Recognize any Unicode newline sequence
|
|
PCRE_NEWLINE_ANYCRLF Recognize CR, LF, & CRLF as newline sequences
|
|
PCRE_NEWLINE_CR Recognize CR as the only newline sequence
|
|
PCRE_NEWLINE_CRLF Recognize CRLF as the only newline sequence
|
|
PCRE_NEWLINE_LF Recognize LF as the only newline sequence
|
|
PCRE_NOTBOL Subject is not the beginning of a line
|
|
PCRE_NOTEOL Subject is not the end of a line
|
|
PCRE_NOTEMPTY An empty string is not a valid match
|
|
PCRE_NOTEMPTY_ATSTART An empty string at the start of the subject
|
|
is not a valid match
|
|
PCRE_NO_START_OPTIMIZE Do not do "start-match" optimizations
|
|
PCRE_NO_UTF16_CHECK Do not check the subject for UTF-16
|
|
validity (only relevant if PCRE_UTF16
|
|
was set at compile time)
|
|
PCRE_NO_UTF32_CHECK Do not check the subject for UTF-32
|
|
validity (only relevant if PCRE_UTF32
|
|
was set at compile time)
|
|
PCRE_NO_UTF8_CHECK Do not check the subject for UTF-8
|
|
validity (only relevant if PCRE_UTF8
|
|
was set at compile time)
|
|
PCRE_PARTIAL ) Return PCRE_ERROR_PARTIAL for a partial
|
|
PCRE_PARTIAL_SOFT ) match if no full matches are found
|
|
PCRE_PARTIAL_HARD Return PCRE_ERROR_PARTIAL for a partial match
|
|
even if there is a full match as well
|
|
PCRE_DFA_SHORTEST Return only the shortest match
|
|
PCRE_DFA_RESTART Restart after a partial match
|
|
.sp
|
|
There are restrictions on what may appear in a pattern when using this matching
|
|
function. Details are given in the
|
|
.\" HREF
|
|
\fBpcrematching\fP
|
|
.\"
|
|
documentation. For details of partial matching, see the
|
|
.\" HREF
|
|
\fBpcrepartial\fP
|
|
.\"
|
|
page.
|
|
.P
|
|
A \fBpcre[16|32]_extra\fP structure contains the following fields:
|
|
.sp
|
|
\fIflags\fP Bits indicating which fields are set
|
|
\fIstudy_data\fP Opaque data from \fBpcre[16|32]_study()\fP
|
|
\fImatch_limit\fP Limit on internal resource use
|
|
\fImatch_limit_recursion\fP Limit on internal recursion depth
|
|
\fIcallout_data\fP Opaque data passed back to callouts
|
|
\fItables\fP Points to character tables or is NULL
|
|
\fImark\fP For passing back a *MARK pointer
|
|
\fIexecutable_jit\fP Opaque data from JIT compilation
|
|
.sp
|
|
The flag bits are PCRE_EXTRA_STUDY_DATA, PCRE_EXTRA_MATCH_LIMIT,
|
|
PCRE_EXTRA_MATCH_LIMIT_RECURSION, PCRE_EXTRA_CALLOUT_DATA,
|
|
PCRE_EXTRA_TABLES, PCRE_EXTRA_MARK and PCRE_EXTRA_EXECUTABLE_JIT. For this
|
|
matching function, the \fImatch_limit\fP and \fImatch_limit_recursion\fP fields
|
|
are not used, and must not be set. The PCRE_EXTRA_EXECUTABLE_JIT flag and
|
|
the corresponding variable are ignored.
|
|
.P
|
|
There is a complete description of the PCRE native API in the
|
|
.\" HREF
|
|
\fBpcreapi\fP
|
|
.\"
|
|
page and a description of the POSIX API in the
|
|
.\" HREF
|
|
\fBpcreposix\fP
|
|
.\"
|
|
page.
|