safely.lisp: Fixes for later SBCL.

[lisp] / safely.lisp

diff --git a/safely.lisp b/safely.lisp
index 0a05f8b..4830a99 100644 (file)
--- a/safely.lisp
+++ b/safely.lisp
@@ -30,6 +30,17 @@
           #:safely-writing))
 (in-package #:safely)
 
+#+(or cmu sbcl)
+(eval-when (:compile-toplevel :execute)
+  (import #+cmu '(ext:unix-namestring unix:unix-link)
+         #+sbcl '(sb-ext:native-namestring)))
+#+cmu
+(progn
+  (declaim (inline unix-namestring))
+  (defun native-namestring (pathname &key as-file)
+    (declare (ignore as-file))
+    (unix-namestring pathname nil)))
+
 (defstruct (safely (:predicate safelyp))
   "Stores information about how to commit or undo safe writes."
   (streams nil)
@@ -136,19 +147,26 @@
   (safely-unwind (safely-trail safe))
   (safely-reset safe))
 
+#+sbcl
+(defun unix-link (from to)
+  (sb-unix::int-syscall ("link" sb-alien:c-string sb-alien:c-string)
+                       from to))
+
 (defun safe-copy (file tag)
   "Make a copy of the FILE.  Return the new name."
 
-  #+cmu
+  #+(or cmu sbcl)
   ;; Use link(2) where available.
   (generate-fresh-file-name file tag
                            (lambda (name)
-                             (let ((from (ext:unix-namestring file t))
-                                   (to (ext:unix-namestring name nil)))
+                             (let ((from (native-namestring file
+                                                            :as-file t))
+                                   (to (native-namestring name
+                                                          :as-file t)))
                                (and from to
-                                    (unix:unix-link from to)))))
+                                    (unix-link from to)))))
 
-  #-cmu
+  #-(or cmu sbcl)
   ;; Otherwise just copy the file contents and hope for the best.
   (with-open-file (input file :element-type :default)
     (multiple-value-bind
@@ -227,8 +245,7 @@
    temporary file, and if BODY completes, it is renamed to FILE."
   (with-gensyms safe
     `(safely (,safe)
-       (let ((,stream (apply #'safely-open-output-stream
-                            ,safe ,file ,open-args)))
+       (let ((,stream (safely-open-output-stream ,safe ,file ,@open-args)))
         ,@body))))
 
 ;;;----- That's all, folks --------------------------------------------------