PCRE_STUDY(3)                                                    PCRE_STUDY(3)



NAME
       PCRE - Perl-compatible regular expressions

SYNOPSIS

       #include <pcre.h>

       pcre_extra *pcre_study(const pcre *code, int options,
            const char **errptr);

DESCRIPTION

       This function studies a compiled pattern, to see if additional
       information can be extracted that might speed up matching. Its
       arguments are:

         code       A compiled regular expression
         options    Options for pcre_study()
         errptr     Where to put an error message

       If the function succeeds, it returns a value that can be passed to
       pcre_exec() via its extra argument.

       If the function returns NULL, either it could not find any additional
       information, or there was an error. You can tell the difference by
       looking at the error value. It is NULL in first case.

       There are currently no options defined; the value of the second
       argument should always be zero.

       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.



                                                                 PCRE_STUDY(3)
