fork download
copy 
  1. ; your code goes here
  2. (defun match (pattern string)
  3.   (let ((i 0)
  4.         (len (length string))
  5.         star)
  6.     (loop
  7.        for c across pattern
  8.        while (< i len)
  9.        do
  10.          ;; (format t "~a [~d]~a ~%" c i (elt string i))
  11.          (case c
  12.            (#\* (setf star t))
  13.            (#\? (incf i))
  14.            (otherwise (if star
  15.                           (loop while (and (< i len) (not (eql c (elt string i))))
  16.                              do (incf i)
  17.                              finally (incf i) (setf star nil))
  18.                           (if (eql c (elt string i))
  19.                               (incf i)
  20.                               (return))))))
  21.      (and (= i len))))
  22.  
  23. (loop :for (s r) :on '("abcd" nil
  24.                        "aabcd" t
  25.                        "a?bcd" t
  26.                        "aa?bxcxd" t
  27.                        "aa?bxcd" t) :by #'cddr
  28.    :for x := (match "a*?b*c*d" s) :do
  29.    ;; (format t "~a ==> ~f ~%" s x)
  30.    (format t "~:[FAIL~;OK~] ~:S: expected ~:[false~;true~]~%" (eql r x) s r))
  31.  
Success #stdin #stdout 0s 10488KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
OK "abcd": expected false
OK "aabcd": expected true
OK "a?bcd": expected true
OK "aa?bxcxd": expected true
OK "aa?bxcd": expected true
https://ideone.com/voRikU
language:
Common Lisp (clisp 2.49.92)
created:
9 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!