github/doc/pcre2_substring_get_byname.3

.TH PCRE2_SUBSTRING_GET_BYNAME 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_byname(pcre2_match_data *\fImatch_data\fP,
.B "  PCRE2_SPTR \fIname\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 name into
newly acquired memory. The arguments are:
.sp
  \fImatch_data\fP    The match data for the match
  \fIname\fP          Name 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 or one of
the following error numbers:
.sp
  PCRE2_ERROR_NOSUBSTRING   there are no groups of that name
  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      memory could not be obtained
.sp
If there is more than one group with the given name, the first one that is set
is returned. In this situation PCRE2_ERROR_UNSET means that no group with the
given name was 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.