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  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.        do
  9.          (when (= i len)
  10.            (return-from match))
  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-from match))))))
  21.      (= 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 "~:[FAIL~;OK~] ~:S: expected ~:[false~;true~]~%" (eql r x) s r))
  30.  
Success #stdin #stdout 0.01s 10536KB
comments (?)
stdin
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Standard input is empty
stdout
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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/9dOWem
language:
Common Lisp (clisp 2.49.92)
created:
9 years ago
visibility:
secret

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