Fix comparison for dereference

[uffi.git] / src / strings.lisp

diff --git a/src/strings.lisp b/src/strings.lisp
index 834d251b2620ffc09888dfdb98507fc2924e42b6..430d8ab48d15c1b29c988108570867b41e487b89 100644 (file)
--- a/src/strings.lisp
+++ b/src/strings.lisp
@@ -393,13 +393,13 @@ that LW/CMU automatically converts strings from c-calls."
   `(new-ptr ,size)
   )
 
-(defmacro foreign-string-length (foreign-string)
-  #+allegro `(ff:foreign-strlen ,foreign-string)
+(defun foreign-string-length (foreign-string)
+  #+allegro (ff:foreign-strlen foreign-string)
   #-allegro
-  `(loop
-      for size from 0
-      until (char= (deref-array ,foreign-string '(:array :unsigned-char) size) #\Null)
-      finally (return size)))
+  (loop
+     for size from 0
+     until (zerop (deref-array foreign-string '(:array :unsigned-char) size))
+     finally (return size)))
 
 
 (defmacro with-foreign-string ((foreign-string lisp-string &optional encoding)