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40 lines
1.4 KiB
40 lines
1.4 KiB
.TH PCRE2_MATCH_DATA_CREATE_FROM_PATTERN 3 "28 August 2021" "PCRE2 10.38"
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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 pcre2_match_data *pcre2_match_data_create_from_pattern(
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.B " const pcre2_code *\fIcode\fP, pcre2_general_context *\fIgcontext\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 function creates a new match data block for holding the result of a match.
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The first argument points to a compiled pattern. The number of capturing
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parentheses within the pattern is used to compute the number of pairs of
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offsets that are required in the match data block. These form the "output
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vector" (ovector) within the match data block, and are used to identify the
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matched string and any captured substrings when matching with
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\fBpcre2_match()\fP. If you are using \fBpcre2_dfa_match()\fP, which uses the
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output vector in a different way, you should use \fBpcre2_match_data_create()\fP
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instead of this function.
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.P
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The second argument points to a general context, for custom memory management,
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or is NULL to use the same memory allocator as was used for the compiled
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pattern. The result of the function is NULL if the memory for the block could
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not be obtained.
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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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