EVOLUTION-MANAGER

Edit File: pcre2_dfa_match.html

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<title>pcre2_dfa_match specification</title>
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<h1>pcre2_dfa_match man page</h1>

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SYNOPSIS
 

#include &#60;pcre2.h&#62;


int pcre2_dfa_match(const pcre2_code *code, PCRE2_SPTR subject,
 PCRE2_SIZE length, PCRE2_SIZE startoffset,
 uint32_t options, pcre2_match_data *match_data,
 pcre2_match_context *mcontext,
 int *workspace, PCRE2_SIZE wscount);

 
DESCRIPTION
 

This function matches a compiled regular expression against a given subject
string, using an alternative matching algorithm that scans the subject string
just once (not Perl-compatible). (The Perl-compatible matching function
is pcre2_match().) The arguments for this function are:
<pre>
 code Points to the compiled pattern
 subject Points to the subject string
 length Length of the subject string
 startoffset Offset in the subject at which to start matching
 options Option bits
 match_data Points to a match data block, for results
 mcontext Points to a match context, or is NULL
 workspace Points to a vector of ints used as working space
 wscount Number of elements in the vector
</pre>
For pcre2_dfa_match(), a match context is needed only if you want to set
up a callout function or specify the recursion limit. The length and
startoffset values are code units, not characters. The options are:
<pre>
 PCRE2_ANCHORED Match only at the first position
 PCRE2_NOTBOL Subject is not the beginning of a line
 PCRE2_NOTEOL Subject is not the end of a line
 PCRE2_NOTEMPTY An empty string is not a valid match
 PCRE2_NOTEMPTY_ATSTART An empty string at the start of the subject
 is not a valid match
 PCRE2_NO_UTF_CHECK Do not check the subject for UTF
 validity (only relevant if PCRE2_UTF
 was set at compile time)
 PCRE2_PARTIAL_SOFT Return PCRE2_ERROR_PARTIAL for a partial
 match if no full matches are found
 PCRE2_PARTIAL_HARD Return PCRE2_ERROR_PARTIAL for a partial match
 even if there is a full match as well
 PCRE2_DFA_RESTART Restart after a partial match
 PCRE2_DFA_SHORTEST Return only the shortest match
</pre>
There are restrictions on what may appear in a pattern when using this matching
function. Details are given in the
<a href="pcre2matching.html">pcre2matching</a>
documentation. For details of partial matching, see the
<a href="pcre2partial.html">pcre2partial</a>
page. There is a complete description of the PCRE2 native API in the
<a href="pcre2api.html">pcre2api</a>
page and a description of the POSIX API in the
<a href="pcre2posix.html">pcre2posix</a>
page.

Return to the <a href="index.html">PCRE2 index page</a>.