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+;;; acdw-compat.el -*- lexical-binding: t; coding: utf-8-unix -*-
+
+;; Author: Case Duckworth <acdw@acdw.net>
+;; Created: 2021-08-11
+;; Keywords: configuration
+;; URL: https://tildegit.org/acdw/emacs
+
+;; This file is NOT part of GNU Emacs.
+
+;;; License:
+;; Everyone is permitted to do whatever with this software, without
+;; limitation.  This software comes without any warranty whatsoever,
+;; but with two pieces of advice:
+;; - Don't hurt yourself.
+;; - Make good choices.
+
+;;; Commentary:
+
+;; This file contains functions, variables, and other code that might not be in
+;; every version of Emacs I use.
+
+;;; Code:
+
+;; Convenience macro
+(defmacro safe-defun (name arglist &optional docstring &rest body)
+  "Like `defun', but only if the function doesn't already exist.
+
+Is it necessary?  Who knows!
+
+\(fn NAME ARGLIST &optional DOCSTRING DECL &rest BODY)"
+  (declare (doc-string 3)
+           (indent 2))
+  `(unless (fboundp (function ,name))
+     (defun ,name ,@body)))
+
+
+;;; Functions for changing capitalization that Do What I Mean
+;; Defined in /usr/share/emacs/28.0.50/lisp/simple.el
+
+(safe-defun upcase-dwim (arg)
+  "Upcase words in the region, if active; if not, upcase word at point.
+If the region is active, this function calls `upcase-region'.
+Otherwise, it calls `upcase-word', with prefix argument passed to it
+to upcase ARG words."
+  (interactive "*p")
+  (if (use-region-p)
+      (upcase-region (region-beginning) (region-end) (region-noncontiguous-p))
+    (upcase-word arg)))
+
+(safe-defun downcase-dwim (arg)
+  "Downcase words in the region, if active; if not, downcase word at point.
+If the region is active, this function calls `downcase-region'.
+Otherwise, it calls `downcase-word', with prefix argument passed to it
+to downcase ARG words."
+  (interactive "*p")
+  (if (use-region-p)
+      (downcase-region (region-beginning) (region-end) (region-noncontiguous-p))
+    (downcase-word arg)))
+
+(safe-defun capitalize-dwim (arg)
+  "Capitalize words in the region, if active; if not, capitalize word at point.
+If the region is active, this function calls `capitalize-region'.
+Otherwise, it calls `capitalize-word', with prefix argument passed to it
+to capitalize ARG words."
+  (interactive "*p")
+  (if (use-region-p)
+      (capitalize-region (region-beginning) (region-end) (region-noncontiguous-p))
+    (capitalize-word arg)))
+
+(provide 'acdw-compat)
+;;; acdw-compat.el ends here