r4659: *** empty log message ***

[kmrcl.git] / strings.lisp

diff --git a/strings.lisp b/strings.lisp
index bf915077496962eb8c3eb680cdc8087f04a06664..9c6d4d1ebd61746262f6b7421feff40e58ef69f3 100644 (file)
--- a/strings.lisp
+++ b/strings.lisp
@@ -7,7 +7,7 @@
 ;;;; Programmer:    Kevin M. Rosenberg
 ;;;; Date Started:  Apr 2000
 ;;;;
-;;;; $Id: strings.lisp,v 1.3 2002/12/14 02:36:42 kevin Exp $
+;;;; $Id: strings.lisp,v 1.8 2003/04/28 16:07:43 kevin Exp $
 ;;;;
 ;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
 ;;;;
@@ -66,12 +66,10 @@
 
 #-excl
 (defun list-to-delimited-string (list &optional (separator #\space))
-  (let ((output (when list (format nil "~A" (car list)))))
-    (dolist (obj (rest list))
-      (setq output (concatenate 'string output
-                               (format nil "~A" separator)
-                               (format nil "~A" obj))))
-    output))
+  (if (consp list)
+      (let ((fmt (format nil "~~A~~{~A~~A~~}" separator)))
+       (format nil fmt (first list) (rest list)))
+      ""))
 
 (defun string-invert (str)
   "Invert case of a string"
@@ -146,3 +144,101 @@
   (when (stringp str)
     (null (find-if #'not-whitespace? str))))
 
+(defun string-replace-chars-strings (str repl-alist)
+  "Replace all instances of a chars with a string. repl-alist is an assoc
+list of characters and replacement strings."
+  (declare (string str))
+  (let* ((orig-len (length str))
+        (new-len orig-len))
+    (declare (fixnum orig-len new-len))
+    (dotimes (i orig-len)
+      (declare (fixnum i))
+      (let* ((c (char str i))
+            (match (assoc c repl-alist :test #'char=)))
+       (declare (character c))
+       (when match
+         (incf new-len (length (cdr match))))))
+    (let ((new-string (make-string new-len))
+         (i 0))
+      (declare (string new-string)
+              (fixnum i))
+      (dotimes (i orig-len)
+       (declare (fixnum i))
+       (let* ((c (char str i))
+              (match (assoc c repl-alist :test #'char=)))
+         (declare (character c))
+         (if match
+             (let ((subst (cdr match)))
+               (dotimes (j (length subst))
+                 (setf (char new-string i) (char subst j))
+                 (incf i)))
+           (progn
+             (setf (char new-string i) c)))))
+      new-string)))
+
+(defun escape-xml-string (string)
+  "Escape invalid XML characters"
+  (string-replace-char-string
+   (string-replace-char-string string #\& "&")
+   #\< "&lt;"))
+
+(defun string-replace-char-string (string repl-char repl-str)
+  "Replace all occurances of repl-char with repl-str"
+ (declare (simple-string string))
+  (let ((count (count repl-char string)))
+    (declare (fixnum count))
+    (if (zerop count)
+       string
+       (locally (declare (optimize (speed 3) (safety 0)))
+         (let* ((old-length (length string))
+                (repl-length (length repl-str))
+                (new-string (make-string (the fixnum
+                                           (+ old-length
+                                              (the fixnum
+                                                (* count
+                                                   (the fixnum (1- repl-length)))))))))
+           (declare (fixnum old-length repl-length)
+                    (simple-string new-string))
+           (let ((newpos 0))
+             (declare (fixnum newpos))
+             (dotimes (oldpos (length string))
+               (declare (fixnum oldpos))
+               (if (char= repl-char (schar string oldpos))
+                   (dotimes (repl-pos repl-length)
+                     (declare (fixnum repl-pos))
+                     (setf (schar new-string newpos) (schar repl-str repl-pos))
+                     (incf newpos))
+                   (progn
+                     (setf (schar new-string newpos) (schar string oldpos))
+                     (incf newpos)))))
+           new-string)))))
+
+    
+
+(defun make-usb8-array (len)
+  (make-array len :adjustable nil
+             :fill-pointer nil
+             :element-type '(unsigned-byte 8)))
+
+(defun usb8-array-to-string (vec)
+  (let* ((len (length vec))
+        (str (make-string len)))
+    (declare (fixnum len)
+            (simple-string str)
+            (optimize (speed 3)))
+    (dotimes (i len)
+      (declare (fixnum i))
+      (setf (schar str i) (code-char (aref vec i))))
+    str))
+
+(defun string-to-usb8-array (str)
+  (let* ((len (length str))
+        (vec (make-usb8-array len)))
+    (declare (fixnum len)
+            (type (array fixnum (*)) vec)
+            (optimize (speed 3)))
+    (dotimes (i len)
+      (declare (fixnum i))
+      (setf (aref vec i) (char-code (schar str i))))
+    vec))
+