PCRE(3)

NAME
PCRE - Perl-compatible regular expressions

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_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_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_OPTIONS Options used for compilation
  PCRE_INFO_SIZE Size of compiled pattern 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 API in the pcreapi page.