text.mod/regex.mod/pcre/doc/pcre2_substring_copy_bynumber.3

.TH PCRE2_SUBSTRING_COPY_BYNUMBER 3 "13 December 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_copy_bynumber(pcre2_match_data *\fImatch_data\fP,
.B "  uint32_t \fInumber\fP, PCRE2_UCHAR *\fIbuffer\fP,"
.B "  PCRE2_SIZE *\fIbufflen\fP);"
.fi
.
.SH DESCRIPTION
.rs
.sp
This is a convenience function for extracting a captured substring into a given
buffer. The arguments are:
.sp
  \fImatch_data\fP    The match data block for the match
  \fInumber\fP        Number of the required substring
  \fIbuffer\fP        Buffer to receive the string
  \fIbufflen\fP       Length of buffer
.sp
The \fIbufflen\fP variable is updated with the length of the extracted string,
excluding the terminating zero. The yield of the function is zero for success
or one of the following error numbers:
.sp
  PCRE2_ERROR_NOSUBSTRING   there are no groups of that number
  PCRE2_ERROR_UNAVAILBLE    the ovector was too small for that group
  PCRE2_ERROR_UNSET         the group did not participate in the match
  PCRE2_ERROR_NOMEMORY      the buffer is too small
.sp
.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.