pcre_fullinfo man page on FreeBSD

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       PCRE - Perl-compatible regular expressions


       #include <pcre.h>

       int pcre_fullinfo(const pcre *code, const pcre_extra *extra,
	    int what, void *where);


       This  function  returns information about a compiled pattern. Its argu‐
       ments are:

	 code			   Compiled regular expression
	 extra			   Result of pcre_study() or NULL
	 what			   What information is required
	 where			   Where to put the information

       The following information is available:

	 PCRE_INFO_BACKREFMAX	   Number of highest back reference
	 PCRE_INFO_CAPTURECOUNT	   Number of capturing subpatterns
	 PCRE_INFO_DEFAULT_TABLES  Pointer to default tables
	 PCRE_INFO_FIRSTBYTE	   Fixed first byte for a match, or
				     -1 for start of string
					or after newline, or
				     -2 otherwise
	 PCRE_INFO_FIRSTTABLE	   Table of first bytes (after studying)
	 PCRE_INFO_JCHANGED	   Return 1 if (?J) or (?-J) was used
	 PCRE_INFO_LASTLITERAL	   Literal last byte required
	 PCRE_INFO_MINLENGTH	   Lower bound length of matching strings
	 PCRE_INFO_NAMECOUNT	   Number of named subpatterns
	 PCRE_INFO_NAMEENTRYSIZE   Size of name table entry
	 PCRE_INFO_NAMETABLE	   Pointer to name table
	 PCRE_INFO_OKPARTIAL	   Return 1 if partial matching can be tried
				     (always returns 1 after release 8.00)
	 PCRE_INFO_OPTIONS	   Option bits used for compilation
	 PCRE_INFO_SIZE		   Size of compiled pattern
	 PCRE_INFO_STUDYSIZE	   Size of study data

       The yield of the function is zero on success or:

	 PCRE_ERROR_NULL	   the argument code was NULL
				   the argument where was NULL
	 PCRE_ERROR_BADMAGIC	   the "magic number" was not found
	 PCRE_ERROR_BADOPTION	   the value of what was invalid

       There is a complete description of the PCRE native API in  the  pcreapi
       page and a description of the POSIX API in the pcreposix page.


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