r7794: add whitespace trim functions

diff --git a/strings.lisp b/strings.lisp
index 03d9b66a82dca873377e855c24ce2c6af7fcfcae..87d325425c8e7902b9ea06542952e31836aa408e 100644 (file)
--- a/strings.lisp
+++ b/strings.lisp
@@ -153,6 +153,8 @@
 (defun is-string-empty (str)
   (zerop (length str)))
 
+(defvar *whitespace-chars* '(#\space #\tab #\return #\linefeed))
+
 (defun is-char-whitespace (c) 
   (declare (character c) (optimize (speed 3) (safety 0)))
   (or (char= c #\Space) (char= c #\Tab) (char= c #\Return)
@@ -162,6 +164,15 @@
   "Return t if string is all whitespace"
   (every #'is-char-whitespace str))
 
+(defun string-right-trim-whitespace (str)
+  (string-right-trim *whitespace-chars* str))
+
+(defun string-left-trim-whitespace (str)
+  (string-left-trim *whitespace-chars* str))
+
+(defun string-trim-whitespace (str)
+  (string-trim *whitespace-chars* str))
+
 (defun replaced-string-length (str repl-alist)
   (declare (simple-string str)
           (optimize (speed 3) (safety 0) (space 0)))