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_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.