;;;; Programmer: Kevin M. Rosenberg
;;;; Date Started: Apr 2000
;;;;
-;;;; $Id: strings.lisp,v 1.49 2003/07/19 20:32:48 kevin Exp $
+;;;; $Id: strings.lisp,v 1.51 2003/08/09 21:42:43 kevin Exp $
;;;;
;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
;;;;
(+ 10 (- code +char-code-upper-a+))
(- code +char-code-0+))))
-(defun escape-uri-field (query)
+(defun uriencode-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 unescape-uri-field (query)
+(defun uridecode-string (query)
"Unescape non-alphanumeric characters for URI fields"
(declare (simple-string query)
(optimize (speed 3) (safety 0) (space 0)))
(defun shrink-vector (str size)
#+allegro
(excl::.primcall 'sys::shrink-svector str size)
- #+sbcl
- (sb-kernel:shrink-vector str size)
#+cmu
(lisp::shrink-vector str size)
#+lispworks
(system::shrink-vector$vector str size)
- #+(or allegro cmu sbcl lispworks)
- str
- #-(or allegro cmu sbcl lispworks)
- (subseq str 0 size))
+ #+sbcl
+ (sb-kernel:shrink-vector str size)
+ #+scl
+ (common-lisp::shrink-vector str size)
+ #-(or allegro cmu lispworks sbcl scl)
+ (setq str (subseq str 0 size))
+ str)
+
+(defun lex-string (string &key (whitespace '(#\space #\newline)))
+ "Separates a string at whitespace and returns a list of strings"
+ (flet ((whitespace? (char) (member char whitespace :test #'char=)))
+ (let ((tokens nil))
+ (do* ((token-start
+ (position-if-not #'whitespace? string)
+ (when token-end
+ (position-if-not #'whitespace? string :start (1+ token-end))))
+ (token-end
+ (when token-start
+ (position-if #'whitespace? string :start token-start))
+ (when token-start
+ (position-if #'whitespace? string :start token-start))))
+ ((null token-start) (nreverse tokens))
+ (push (subseq string token-start token-end) tokens)))))
+
+(defun split-alphanumeric-string (string)
+ "Separates a string at any non-alphanumeric chararacter"
+ (flet ((whitespace? (char) (non-alphanumericp char)))
+ (let ((tokens nil))
+ (do* ((token-start
+ (position-if-not #'whitespace? string)
+ (when token-end
+ (position-if-not #'whitespace? string :start (1+ token-end))))
+ (token-end
+ (when token-start
+ (position-if #'whitespace? string :start token-start))
+ (when token-start
+ (position-if #'whitespace? string :start token-start))))
+ ((null token-start) (nreverse tokens))
+ (push (subseq string token-start token-end) tokens)))))
+
+