pcre_fullinfo specification

# pcre_fullinfo man page

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SYNOPSIS

#include <pcre.h>

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

DESCRIPTION

This function returns information about a compiled pattern. Its arguments 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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