X-Git-Url: http://git.kpe.io/?p=kmrcl.git;a=blobdiff_plain;f=strings.lisp;h=9dbe1babdccd7950172033dc0d5c6d9614ff4921;hp=4ef18f0134e586755ab1cb9177e82ff53ca11b10;hb=e55fe0dc654bb7cd01e978a7080b6087788f173f;hpb=8513c6f273613b0ceb2b48c07da6a0b1803c32a5

diff --git a/strings.lisp b/strings.lisp
index 4ef18f0..9dbe1ba 100644
--- a/strings.lisp
+++ b/strings.lisp
@@ -413,9 +413,9 @@ for characters in a string"
   (declare (type (integer 0 15) n))
   (schar +hex-chars+ n))
 
-(defconstant +char-code-lower-a+ (char-code #\a))
-(defconstant +char-code-upper-a+ (char-code #\A))
-(defconstant +char-code-0+ (char-code #\0))
+(defconst +char-code-lower-a+ (char-code #\a))
+(defconst +char-code-upper-a+ (char-code #\A))
+(defconst +char-code-0+ (char-code #\0))
 (declaim (type fixnum +char-code-0+ +char-code-upper-a+
 	       +char-code-0))
 
@@ -604,7 +604,12 @@ for characters in a string"
 
 (defun split-alphanumeric-string (string)
   "Separates a string at any non-alphanumeric chararacter"
-  (flet ((is-sep (char) (non-alphanumericp char)))
+  (declare (simple-string string)
+	   (optimize (speed 3) (safety 0)))
+  (flet ((is-sep (char) 
+	   (declare (character char))
+	   (and (non-alphanumericp char)
+		(not (char= #\_ char)))))
     (let ((tokens nil))
       (do* ((token-start
              (position-if-not #'is-sep string) 
@@ -619,6 +624,30 @@ for characters in a string"
         (push (subseq string token-start token-end) tokens)))))
 
 
+(defun trim-non-alphanumeric (word)
+  "Strip non-alphanumeric characters from beginning and end of a word."
+  (declare (simple-string word)
+	   (optimize (speed 3) (safety 0) (space 0)))
+  (let* ((start 0)
+	 (len (length word))
+	 (end len))
+    (declare (fixnum start end len))
+    (do ((done nil))
+	((or done (= start end)))
+      (if (alphanumericp (schar word start))
+	  (setq done t)
+	(incf start)))
+    (when (> end start)
+      (do ((done nil))
+	  ((or done (= start end)))
+	(if (alphanumericp (schar word (1- end)))
+	    (setq done t)
+	  (decf end))))
+    (if (or (plusp start) (/= len end))
+	(subseq word start end)
+      word)))
+
+	  
 
 (defun collapse-whitespace (s)
   "Convert multiple whitespace characters to a single space character."