(module pcre mzscheme
  (require mzlib/foreign)
  (unsafe!)

  (provide pcregexp
	   pcregexp-match)

  (define pcre-lib (ffi-lib "libpcre"))

  (define pcre-compile 
    (get-ffi-obj "pcre_compile" pcre-lib 
                 (_fun _bytes _int _bytes _bytes _pointer
                       -> _pointer)))
  (define pcre-study
    (get-ffi-obj "pcre_study" pcre-lib 
                 (_fun _pointer _int _bytes
                       -> _pointer)))
  (define pcre-exec
    (get-ffi-obj "pcre_exec" pcre-lib 
                 (_fun _pointer _pointer _bytes _int 
                       _int _int _bytes _int
                       -> _int)))
  
  (define random-vector (make-bytes 100))

  (define (pcregexp s)
    (let* ([pat (pcre-compile s 0 random-vector random-vector #f)]
           [extra (pcre-study pat 0 random-vector)])
      (cons pat extra)))

  (define (pcregexp-match re bytes)
    (pcre-exec (car re) (cdr re) bytes (bytes-length bytes)
               0 0 random-vector 10)))