debian update

[kmrcl.git] / strings.lisp

diff --git a/strings.lisp b/strings.lisp
index 9a9f42d8a354985df274ac5829ad0118b21e1eea..3390581840e0d9aafa67b80068ebf05499f93d5d 100644 (file)
--- a/strings.lisp
+++ b/strings.lisp
@@ -7,8 +7,6 @@
 ;;;; Programmer:    Kevin M. Rosenberg
 ;;;; Date Started:  Apr 2000
 ;;;;
-;;;; $Id$
-;;;;
 ;;;; This file, part of KMRCL, is Copyright (c) 2002-2006 by Kevin M. Rosenberg
 ;;;;
 ;;;; KMRCL users are granted the rights to distribute and use this software
@@ -720,3 +718,14 @@ for characters in a string"
       (do ((x (read stream nil eof) (read stream nil eof))
            (l nil (cons x l)))
           ((eq x eof) (nreverse l))))))
+
+(defun safely-read-from-string (str &rest read-from-string-args)
+  "Read an expression from the string STR, with *READ-EVAL* set
+to NIL. Any unsafe expressions will be replaced by NIL in the
+resulting S-Expression."
+  (let ((*read-eval* nil))
+    (ignore-errors (apply 'read-from-string str read-from-string-args))))
+
+(defun parse-float (f)
+  (let ((*read-default-float-format* 'double-float))
+    (coerce (safely-read-from-string f) 'double-float)))