pcre_fullinfo man page

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#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 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_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.

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