83 lines
3.1 KiB
Groff
83 lines
3.1 KiB
Groff
.TH PCRE2_MATCH 3 "14 November 2017" "PCRE2 10.31"
|
|
.SH NAME
|
|
PCRE2 - Perl-compatible regular expressions (revised API)
|
|
.SH SYNOPSIS
|
|
.rs
|
|
.sp
|
|
.B #include <pcre2.h>
|
|
.PP
|
|
.nf
|
|
.B int pcre2_match(const pcre2_code *\fIcode\fP, PCRE2_SPTR \fIsubject\fP,
|
|
.B " PCRE2_SIZE \fIlength\fP, PCRE2_SIZE \fIstartoffset\fP,"
|
|
.B " uint32_t \fIoptions\fP, pcre2_match_data *\fImatch_data\fP,"
|
|
.B " pcre2_match_context *\fImcontext\fP);"
|
|
.fi
|
|
.
|
|
.SH DESCRIPTION
|
|
.rs
|
|
.sp
|
|
This function matches a compiled regular expression against a given subject
|
|
string, using a matching algorithm that is similar to Perl's. It returns
|
|
offsets to what it has matched and to captured substrings via the
|
|
\fBmatch_data\fP block, which can be processed by functions with names that
|
|
start with \fBpcre2_get_ovector_...()\fP or \fBpcre2_substring_...()\fP. The
|
|
return from \fBpcre2_match()\fP is one more than the highest numbered capturing
|
|
pair that has been set (for example, 1 if there are no captures), zero if the
|
|
vector of offsets is too small, or a negative error code for no match and other
|
|
errors. The function arguments are:
|
|
.sp
|
|
\fIcode\fP Points to the compiled pattern
|
|
\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
|
|
\fImatch_data\fP Points to a match data block, for results
|
|
\fImcontext\fP Points to a match context, or is NULL
|
|
.sp
|
|
A match context is needed only if you want to:
|
|
.sp
|
|
Set up a callout function
|
|
Set a matching offset limit
|
|
Change the heap memory limit
|
|
Change the backtracking match limit
|
|
Change the backtracking depth limit
|
|
Set custom memory management specifically for the match
|
|
.sp
|
|
The \fIlength\fP and \fIstartoffset\fP values are code
|
|
units, not characters. The length may be given as PCRE2_ZERO_TERMINATE for a
|
|
subject that is terminated by a binary zero code unit. The options are:
|
|
.sp
|
|
PCRE2_ANCHORED Match only at the first position
|
|
PCRE2_ENDANCHORED Pattern can match only at end of subject
|
|
PCRE2_NOTBOL Subject string is not the beginning of a line
|
|
PCRE2_NOTEOL Subject string is not the end of a line
|
|
PCRE2_NOTEMPTY An empty string is not a valid match
|
|
.\" JOIN
|
|
PCRE2_NOTEMPTY_ATSTART An empty string at the start of the subject
|
|
is not a valid match
|
|
PCRE2_NO_JIT Do not use JIT matching
|
|
.\" JOIN
|
|
PCRE2_NO_UTF_CHECK Do not check the subject for UTF
|
|
validity (only relevant if PCRE2_UTF
|
|
was set at compile time)
|
|
.\" JOIN
|
|
PCRE2_PARTIAL_HARD Return PCRE2_ERROR_PARTIAL for a partial
|
|
match even if there is a full match
|
|
.\" JOIN
|
|
PCRE2_PARTIAL_SOFT Return PCRE2_ERROR_PARTIAL for a partial
|
|
match if no full matches are found
|
|
.sp
|
|
For details of partial matching, see the
|
|
.\" HREF
|
|
\fBpcre2partial\fP
|
|
.\"
|
|
page. There is a complete description of the PCRE2 native API in the
|
|
.\" HREF
|
|
\fBpcre2api\fP
|
|
.\"
|
|
page and a description of the POSIX API in the
|
|
.\" HREF
|
|
\fBpcre2posix\fP
|
|
.\"
|
|
page.
|