(defun is-string-empty (str)
(zerop (length str)))
-(defvar *whitespace-chars* '(#\space #\tab #\return #\linefeed))
+(defvar *whitespace-chars* '(#\space #\tab #\return #\linefeed
+ #+allegro #\%space
+ #+lispworks #\No-Break-Space))
(defun is-char-whitespace (c)
(declare (character c) (optimize (speed 3) (safety 0)))
(or (char= c #\Space) (char= c #\Tab) (char= c #\Return)
- (char= c #\Linefeed)))
+ (char= c #\Linefeed)
+ #+allegro (char= c #\%space)
+ #+lispworks (char= c #\No-Break-Space)))
(defun is-string-whitespace (str)
"Return t if string is all whitespace"
(+ 10 (- code +char-code-upper-a+))
(- code +char-code-0+))))
-(defun uriencode-string (query)
+(defun encode-uri-string (query)
"Escape non-alphanumeric characters for URI fields"
(declare (simple-string query)
(optimize (speed 3) (safety 0) (space 0)))
(setf (schar str dpos) (hexchar (logand c 15))))
(setf (schar str dpos) ch)))))
-(defun uridecode-string (query)
+(defun decode-uri-string (query)
"Unescape non-alphanumeric characters for URI fields"
(declare (simple-string query)
(optimize (speed 3) (safety 0) (space 0)))
(push (subseq string token-start token-end) tokens)))))
-(defun match-unique-abbreviation (abbr strings)
- "Returns position of ABBR in STRINGS. ABBR may be a unique abbreviation.
-Returns NIL if no match found."
- (let ((len (length abbr))
- (matches nil))
- (dotimes (i (length strings))
- (let* ((s (nth i strings))
- (l (length s)))
+
+(defun collapse-whitespace (s)
+ "Convert multiple whitespace characters to a single space character."
+ (declare (simple-string s)
+ (optimize (speed 3) (safety 0)))
+ (with-output-to-string (stream)
+ (do ((pos 0 (1+ pos))
+ (in-white nil)
+ (len (length s)))
+ ((= pos len))
+ (declare (fixnum pos len))
+ (let ((c (schar s pos)))
+ (declare (character c))
(cond
- ((= len l)
- (when (string= abbr s)
- (push (cons s i) matches)))
- ((< len l)
- (when (string= abbr (subseq s 0 len))
- (push (cons s i) matches))))))
- (when (= 1 (length matches))
- (cdr (first matches)))))
+ ((kl:is-char-whitespace c)
+ (unless in-white
+ (write-char #\space stream))
+ (setq in-white t))
+ (t
+ (setq in-white nil)
+ (write-char c stream)))))))
+
+(defun string->list (string)
+ (let ((eof (list nil)))
+ (with-input-from-string (stream string)
+ (do ((x (read stream nil eof) (read stream nil eof))
+ (l nil (cons x l)))
+ ((eq x eof) (nreverse l))))))