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 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_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
         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.