diff --git a/.dir-locals.el b/.dir-locals.el
index b38d4d63..21bbe48a 100644
--- a/.dir-locals.el
+++ b/.dir-locals.el
@@ -1,7 +1,25 @@
-;;; Directory Local Variables
-;;; For more information see (info "(emacs) Directory Variables")
-
-((sh-mode
-  (indent-tabs-mode)
-  (sh-basic-offset . 4)))
+; Directory Local Variables
+; For more information see (info "(emacs) Directory Variables")
+; Sets emacs variables based on mode.
+; A list of (major-mode . ((var1 . value1) (var2 . value2)))
+; Mode can be nil, which gives default values.
+; Characters width is set to 109 for .c and XML but for everything else 79.
+; If you update this file make sure to update .vimrc and .editorconfig too.
 
+((c-mode . ((fill-column . 109)
+            (c-basic-offset . 8)
+            (eval . (c-set-offset 'substatement-open 0))
+            (eval . (c-set-offset 'statement-case-open 0))
+            (eval . (c-set-offset 'case-label 0))
+            (eval . (c-set-offset 'arglist-intro '++))
+            (eval . (c-set-offset 'arglist-close 0))
+            (eval . (c-set-offset 'arglist-cont-nonempty '(c-lineup-gcc-asm-reg c-lineup-arglist)))))
+ (nxml-mode . ((nxml-child-indent . 2)
+               (fill-column . 109)))
+ (meson-mode . ((meson-indent-basic . 8)))
+ (sh-mode . ((sh-basic-offset . 4)
+             (sh-indentation . 4)))
+ (awk-mode . ((c-basic-offset . 8)))
+ (nil . ((indent-tabs-mode . nil)
+         (tab-width . 8)
+         (fill-column . 79))) )