X-Git-Url: http://git.kpe.io/?p=kmrcl.git;a=blobdiff_plain;f=strings.lisp;h=fbb130caad55b5d4442653f43d1d57290354bd4a;hp=e9a73a3c9c7f1c3041680fc6cc9b5466bb08fe03;hb=12e4f3260043dbc89dc8efd78cb9f116e0173054;hpb=e2450e52a0813b8583395d7ac88f24e896f46e13

diff --git a/strings.lisp b/strings.lisp
index e9a73a3..fbb130c 100644
--- a/strings.lisp
+++ b/strings.lisp
@@ -227,17 +227,20 @@ list of characters and replacement strings."
 (defun make-usb8-array (len)
   (make-array len :element-type '(unsigned-byte 8)))
 
-(defun usb8-array-to-string (vec)
-  (declare (type (simple-array (unsigned-byte 8) (*)) vec))
-  (let* ((len (length vec))
+(defun usb8-array-to-string (vec &key (start 0) end)
+  (declare (type (simple-array (unsigned-byte 8) (*)) vec)
+	   (fixnum start))
+  (unless end
+    (setq end (length vec)))
+  (let* ((len (- end start))
 	 (str (make-string len)))
     (declare (fixnum len)
 	     (simple-string str)
-	     (optimize (speed 3)))
+	     (optimize (speed 3) (safety 0)))
     (do ((i 0 (1+ i)))
 	((= i len) str)
       (declare (fixnum i))
-      (setf (schar str i) (code-char (aref vec i))))))
+      (setf (schar str i) (code-char (aref vec (the fixnum (+ i start))))))))
 
 (defun string-to-usb8-array (str)
   (declare (simple-string str))
@@ -413,9 +416,9 @@ 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))
+(defconstant* +char-code-lower-a+ (char-code #\a))
+(defconstant* +char-code-upper-a+ (char-code #\A))
+(defconstant* +char-code-0+ (char-code #\0))
 (declaim (type fixnum +char-code-0+ +char-code-upper-a+
 	       +char-code-0))
 
@@ -476,9 +479,9 @@ for characters in a string"
 
 
 (eval-when (:compile-toplevel :load-toplevel :execute)
-  (defvar +unambigous-charset+
+  (defvar +unambiguous-charset+
     "abcdefghjkmnpqrstuvwxyz123456789ABCDEFGHJKLMNPQSRTUVWXYZ")
-  (defconstant +unambigous-length+ (length +unambigous-charset+)))
+  (defconstant* +unambiguous-length+ (length +unambiguous-charset+)))
 
 (defun random-char (&optional (set :lower-alpha))
   (ecase set
@@ -491,8 +494,8 @@ for characters in a string"
 	 (code-char (+ +char-code-lower-a+ n)))))
     (:upper-alpha
      (code-char (+ +char-code-upper-a+ (random 26))))
-    (:unambigous
-     (schar +unambigous-charset+ (random +unambigous-length+)))
+    (:unambiguous
+     (schar +unambiguous-charset+ (random +unambiguous-length+)))
     (:upper-lower-alpha
      (let ((n (random 52)))
        (if (>= n 26)
@@ -552,11 +555,24 @@ for characters in a string"
        
 
 (defun string-maybe-shorten (str maxlen)
-  (let ((len (length str)))
-    (if (<= len maxlen)
-	str
-      (concatenate 'string (subseq str 0 (- maxlen 3)) "..."))))
+  (string-elide str maxlen :end))
 
+(defun string-elide (str maxlen position)
+  (declare (fixnum maxlen))
+  (let ((len (length str)))
+    (declare (fixnum len))
+    (cond
+     ((<= len maxlen)
+      str)
+     ((<= maxlen 3)
+      "...")
+     ((eq position :middle)
+      (multiple-value-bind (mid remain) (truncate maxlen 2)
+	(let ((end1 (- mid 1))
+	      (start2 (- len (- mid 2) remain))) 
+	  (concatenate 'string (subseq str 0 end1) "..." (subseq str start2)))))
+     ((or (eq position :end) t)
+      (concatenate 'string (subseq str 0 (- maxlen 3)) "...")))))
 
 (defun shrink-vector (str size)
   #+allegro
@@ -591,7 +607,12 @@ 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) 
@@ -606,7 +627,30 @@ 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."
   (declare (simple-string s)
@@ -627,3 +671,10 @@ for characters in a string"
 	 (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))))))