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46 lines
1.5 KiB
Plaintext
46 lines
1.5 KiB
Plaintext
.TH PCRE2_SUBSTRING_GET_BYNUMBER 3 "13 December 2014" "PCRE2 10.45"
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.SH NAME
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PCRE2 - Perl-compatible regular expressions (revised API)
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.SH SYNOPSIS
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.rs
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.sp
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.B #include <pcre2.h>
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.PP
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.nf
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.B int pcre2_substring_get_bynumber(pcre2_match_data *\fImatch_data\fP,
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.B " uint32_t \fInumber\fP, PCRE2_UCHAR **\fIbufferptr\fP, PCRE2_SIZE *\fIbufflen\fP);"
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.fi
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.
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.SH DESCRIPTION
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.rs
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.sp
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This is a convenience function for extracting a captured substring by number
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into newly acquired memory. The arguments are:
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.sp
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\fImatch_data\fP The match data for the match
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\fInumber\fP Number of the required substring
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\fIbufferptr\fP Where to put the string pointer
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\fIbufflen\fP Where to put the string length
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.sp
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The memory in which the substring is placed is obtained by calling the same
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memory allocation function that was used for the match data block. The
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convenience function \fBpcre2_substring_free()\fP can be used to free it when
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it is no longer needed. The yield of the function is zero for success or one of
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the following error numbers:
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.sp
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PCRE2_ERROR_NOSUBSTRING there are no groups of that number
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PCRE2_ERROR_UNAVAILBLE the ovector was too small for that group
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PCRE2_ERROR_UNSET the group did not participate in the match
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PCRE2_ERROR_NOMEMORY memory could not be obtained
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.sp
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.P
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There is a complete description of the PCRE2 native API in the
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.\" HREF
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\fBpcre2api\fP
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.\"
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page and a description of the POSIX API in the
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.\" HREF
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\fBpcre2posix\fP
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.\"
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page.
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