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;;; Clang-format emacs integration for use with C/Objective-C/C++.
;; This defines a function clang-format-region that you can bind to a key.
;; A minimal .emacs would contain:
;;
;; (load "<path-to-clang>/tools/clang-format/clang-format.el")
;; (global-set-key [C-M-tab] 'clang-format-region)
;;
;; Depending on your configuration and coding style, you might need to modify
;; 'style' and 'binary' below.
(defun clang-format-region ()
(interactive)
(let* ((orig-windows (get-buffer-window-list (current-buffer)))
(orig-window-starts (mapcar #'window-start orig-windows))
(orig-point (point))
(binary "clang-format")
(style "LLVM"))
(if mark-active
(setq beg (region-beginning)
end (region-end))
(setq beg (min (line-beginning-position) (1- (point-max)))
end (line-end-position)))
(call-process-region (point-min) (point-max) binary t t nil
"-offset" (number-to-string (1- beg))
"-length" (number-to-string (- end beg))
"-style" style)
(goto-char orig-point)
(dotimes (index (length orig-windows))
(set-window-start (nth index orig-windows)
(nth index orig-window-starts)))))
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