74 lines
2.9 KiB
Groff
74 lines
2.9 KiB
Groff
.TH PCRE2_SUBSTITUTE 3 "11 November 2014" "PCRE2 10.00"
|
|
.SH NAME
|
|
PCRE2 - Perl-compatible regular expressions (revised API)
|
|
.SH SYNOPSIS
|
|
.rs
|
|
.sp
|
|
.B #include <pcre2.h>
|
|
.PP
|
|
.nf
|
|
.B int pcre2_substitute(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, PCRE2_SPTR \fIreplacement\fP,"
|
|
.B " PCRE2_SIZE \fIrlength\fP, PCRE2_UCHAR *\fIoutputbuffer\fP,"
|
|
.B " PCRE2_SIZE *\fIoutlengthptr\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 then makes a
|
|
copy of the subject, substituting a replacement string for what was matched.
|
|
Its 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, or is NULL
|
|
\fImcontext\fP Points to a match context, or is NULL
|
|
\fIreplacement\fP Points to the replacement string
|
|
\fIrlength\fP Length of the replacement string
|
|
\fIoutputbuffer\fP Points to the output buffer
|
|
\fIoutlengthptr\fP Points to the length of the output buffer
|
|
.sp
|
|
A match context is needed only if you want to:
|
|
.sp
|
|
Set up a callout function
|
|
Change the limit for calling the internal function \fImatch()\fP
|
|
Change the limit for calling \fImatch()\fP recursively
|
|
Set custom memory management when the heap is used for recursion
|
|
.sp
|
|
The \fIlength\fP, \fIstartoffset\fP and \fIrlength\fP values are code
|
|
units, not characters, as is the contents of the variable pointed at by
|
|
\fIoutlengthptr\fP, which is updated to the actual length of the new string.
|
|
The options are:
|
|
.sp
|
|
PCRE2_ANCHORED Match only at the first position
|
|
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
|
|
PCRE2_NOTEMPTY_ATSTART An empty string at the start of the subject
|
|
is not a valid match
|
|
PCRE2_NO_UTF_CHECK Do not check the subject or replacement for
|
|
UTF validity (only relevant if PCRE2_UTF
|
|
was set at compile time)
|
|
PCRE2_SUBSTITUTE_GLOBAL Replace all occurrences in the subject
|
|
.sp
|
|
The function returns the number of substitutions, which may be zero if there
|
|
were no matches. The result can be greater than one only when
|
|
PCRE2_SUBSTITUTE_GLOBAL is set.
|
|
.P
|
|
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.
|