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diff --git a/lib/prog/jao-sloc.el b/lib/prog/jao-sloc.el
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+++ b/lib/prog/jao-sloc.el
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+;; sloc.el -- LOC utilities
+
+;;;###autoload
+(defun count-sloc-region (beg end kind)
+  "Count source lines of code in region (or (narrowed part of)
+   the buffer when no region is active).  SLOC means that empty
+   lines and comment-only lines are not taken into consideration.
+
+   (function by Stefan Monnier).
+  "
+  (interactive
+   (if (use-region-p)
+       (list (region-beginning) (region-end) 'region)
+     (list (point-min) (point-max) 'buffer)))
+  (save-excursion
+    (goto-char beg)
+    (let ((count 0))
+      (while (< (point) end)
+        (cond
+         ((nth 4 (syntax-ppss)) ;; BOL is already inside a comment.
+          (let ((pos (point)))
+            (goto-char (nth 8 (syntax-ppss)))
+            (forward-comment (point-max))
+            (if (< (point) pos) (goto-char pos)))) ;; Just paranoia
+         (t (forward-comment (point-max))))
+        (setq count (1+ count))
+        (forward-line))
+      (when kind
+        (message "SLOC in %s: %s." kind count)))))
+
+
+(provide 'jao-sloc)
+;;; sloc.el ends here