pcre2/doc/pcre2_substring_get_bynumber.3

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.TH PCRE2_SUBSTRING_GET_BYNUMBER 3 "21 October 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_substring_get_bynumber(pcre2_match_data *\fImatch_data\fP,
.B " unsigned int \fInumber\fP, PCRE2_UCHAR **\fIbufferptr\fP, PCRE2_SIZE *\fIbufflen\fP);"
.fi
.
.SH DESCRIPTION
.rs
.sp
This is a convenience function for extracting a captured substring by number into
newly acquired memory. The arguments are:
.sp
\fImatch_data\fP The match data for the match
\fInumber\fP Number of the required substring
\fIbufferptr\fP Where to put the string pointer
\fIbufflen\fP Where to put the string length
.sp
The memory in which the substring is placed is obtained by calling the same
memory allocation function that was used for the match data block. The
convenience function \fBpcre2_substring_free()\fP can be used to free it when
it is no longer needed. The yield of the function is zero for success,
PCRE2_ERROR_NOMEMORY if sufficient memory could not be obtained, or
PCRE2_ERROR_NOSUBSTRING if the string number is invalid.
.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.