Merge branch 'master' of ssh://git.b9.com/home/gitpub/kmrcl

[kmrcl.git] / strings.lisp

diff --git a/strings.lisp b/strings.lisp
index 4dcda494249b45e44b6166bf304f0c154f0ce8a2..3390581840e0d9aafa67b80068ebf05499f93d5d 100644 (file)
--- a/strings.lisp
+++ b/strings.lisp
@@ -718,3 +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)))