NAME

       PCRE - Perl-compatible regular expressions

SYNOPSIS

       #include <pcre.h>

       int pcre_jit_exec(const pcre *code, const pcre_extra *extra,
            const char *subject, int length, int startoffset,
            int options, int *ovector, int ovecsize,
            pcre_jit_stack *jstack);

       int pcre16_jit_exec(const pcre16 *code, const pcre16_extra *extra,
            PCRE_SPTR16 subject, int length, int startoffset,
            int options, int *ovector, int ovecsize,
            pcre_jit_stack *jstack);

       int pcre32_jit_exec(const pcre32 *code, const pcre32_extra *extra,
            PCRE_SPTR32 subject, int length, int startoffset,
            int options, int *ovector, int ovecsize,
            pcre_jit_stack *jstack);

DESCRIPTION

       This  function  matches  a  compiled regular expression that has been successfully studied
       with one of the JIT options against a given subject string,  using  a  matching  algorithm
       that  is  similar to Perl's. It is a "fast path" interface to JIT, and it bypasses some of
       the sanity checks that pcre_exec() applies.  It returns offsets  to  captured  substrings.
       Its arguments are:

         code         Points to the compiled pattern
         extra        Points to an associated pcre[16|32]_extra structure,
                        or is NULL
         subject      Points to the subject string
         length       Length of the subject string, in bytes
         startoffset  Offset in bytes in the subject at which to
                        start matching
         options      Option bits
         ovector      Points to a vector of ints for result offsets
         ovecsize     Number of elements in the vector (a multiple of 3)
         jstack       Pointer to a JIT stack

       The allowed options are:

         PCRE_NOTBOL            Subject string is not the beginning of a line
         PCRE_NOTEOL            Subject string is not the end of a line
         PCRE_NOTEMPTY          An empty string is not a valid match
         PCRE_NOTEMPTY_ATSTART  An empty string at the start of the subject
                                  is not a valid match
         PCRE_NO_UTF16_CHECK    Do not check the subject for UTF-16
                                  validity (only relevant if PCRE_UTF16
                                  was set at compile time)
         PCRE_NO_UTF32_CHECK    Do not check the subject for UTF-32
                                  validity (only relevant if PCRE_UTF32
                                  was set at compile time)
         PCRE_NO_UTF8_CHECK     Do not check the subject for UTF-8
                                  validity (only relevant if PCRE_UTF8
                                  was set at compile time)
         PCRE_PARTIAL           ) Return PCRE_ERROR_PARTIAL for a partial
         PCRE_PARTIAL_SOFT      )   match if no full matches are found
         PCRE_PARTIAL_HARD      Return PCRE_ERROR_PARTIAL for a partial match
                                  if that is found before a full match

       However,  the  PCRE_NO_UTF[8|16|32]_CHECK  options  have no effect, as this check is never
       applied. For details of partial matching, see the pcrepartial page. A pcre_extra structure
       contains the following fields:

         flags            Bits indicating which fields are set
         study_data       Opaque data from pcre[16|32]_study()
         match_limit      Limit on internal resource use
         match_limit_recursion  Limit on internal recursion depth
         callout_data     Opaque data passed back to callouts
         tables           Points to character tables or is NULL
         mark             For passing back a *MARK pointer
         executable_jit   Opaque data from JIT compilation

       The       flag      bits      are      PCRE_EXTRA_STUDY_DATA,      PCRE_EXTRA_MATCH_LIMIT,
       PCRE_EXTRA_MATCH_LIMIT_RECURSION,       PCRE_EXTRA_CALLOUT_DATA,        PCRE_EXTRA_TABLES,
       PCRE_EXTRA_MARK and PCRE_EXTRA_EXECUTABLE_JIT.

       There  is  a  complete  description  of  the  PCRE  native  API  in the pcreapi page and a
       description of the JIT API in the pcrejit page.