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diff --git a/.emacs.d/lisp/php-util-buffer.el b/.emacs.d/lisp/php-util-buffer.el
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+;;; php-util-buffer.el --- Utility function for buffer manipulation  -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2018-2019  Friends of Emacs-PHP development
+;; Copyright 2013 The go-mode Authors.  All rights reserved.
+
+;; Author: Dominik Honnef
+;; Maintainer: USAMI Kenta <tadsan@zonu.me>
+;; URL: https://github.com/emacs-php/php-mode
+;; Keywords: lisp
+
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; Functions for patching buffer.
+
+;;; Original License:
+
+;; Copyright (c) 2014 The go-mode Authors. All rights reserved.
+
+;; Redistribution and use in source and binary forms, with or without
+;; modification, are permitted provided that the following conditions are
+;; met:
+
+;;    * Redistributions of source code must retain the above copyright
+;; notice, this list of conditions and the following disclaimer.
+;;    * Redistributions in binary form must reproduce the above
+;; copyright notice, this list of conditions and the following disclaimer
+;; in the documentation and/or other materials provided with the
+;; distribution.
+;;    * Neither the name of the copyright holder nor the names of its
+;; contributors may be used to endorse or promote products derived from
+;; this software without specific prior written permission.
+
+;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+;; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+;; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+;; A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+;; OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+;; SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+;; LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+;; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+;; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+;; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+;; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+;;; Code:
+
+;; gofmt apply-rcs-patch Function
+;; These functions are copied by go-mode(gofmt).
+(defun php-util-buffer--delete-whole-line (&optional arg)
+  "Delete the current line without putting it in the `kill-ring'.
+Derived from function `kill-whole-line'.  ARG is defined as for that
+function."
+  (setq arg (or arg 1))
+  (if (and (> arg 0)
+           (eobp)
+           (save-excursion (forward-visible-line 0) (eobp)))
+      (signal 'end-of-buffer nil))
+  (if (and (< arg 0)
+           (bobp)
+           (save-excursion (end-of-visible-line) (bobp)))
+      (signal 'beginning-of-buffer nil))
+  (cond ((zerop arg)
+         (delete-region (progn (forward-visible-line 0) (point))
+                        (progn (end-of-visible-line) (point))))
+        ((< arg 0)
+         (delete-region (progn (end-of-visible-line) (point))
+                        (progn (forward-visible-line (1+ arg))
+                               (unless (bobp)
+                                 (backward-char))
+                               (point))))
+        (t
+         (delete-region (progn (forward-visible-line 0) (point))
+                        (progn (forward-visible-line arg) (point))))))
+
+(defun php-util-buffer-apply-rcs-patch (target-buffer patch-buffer)
+  "Apply an RCS-formatted diff from `PATCH-BUFFER' to the `TARGET-BUFFER'."
+  (let (
+        ;; Relative offset between buffer line numbers and line numbers
+        ;; in patch.
+        ;;
+        ;; Line numbers in the patch are based on the source file, so
+        ;; we have to keep an offset when making changes to the
+        ;; buffer.
+        ;;
+        ;; Appending lines decrements the offset (possibly making it
+        ;; negative), deleting lines increments it. This order
+        ;; simplifies the forward-line invocations.
+        (line-offset 0)
+        (column (current-column)))
+    (save-excursion
+      (with-current-buffer patch-buffer
+        (goto-char (point-min))
+        (while (not (eobp))
+          (unless (looking-at "^\\([ad]\\)\\([0-9]+\\) \\([0-9]+\\)")
+            (error "Invalid rcs patch or internal error in php-util-buffer-apply-rcs-patch"))
+          (forward-line)
+          (let ((action (match-string 1))
+                (from (string-to-number (match-string 2)))
+                (len  (string-to-number (match-string 3))))
+            (cond
+             ((equal action "a")
+              (let ((start (point)))
+                (forward-line len)
+                (let ((text (buffer-substring start (point))))
+                  (with-current-buffer target-buffer
+                    (cl-decf line-offset len)
+                    (goto-char (point-min))
+                    (forward-line (- from len line-offset))
+                    (insert text)))))
+             ((equal action "d")
+              (with-current-buffer target-buffer
+                (goto-char (point-min))
+                (forward-line (1- (- from line-offset)))
+                (cl-incf line-offset len)
+                (php-util-buffer--delete-whole-line len)))
+             (t
+              (error "Invalid rcs patch or internal error in php-util-buffer--apply-rcs-patch")))))))
+    (move-to-column column)))
+;; Copy of go-mode.el ends here
+
+(provide 'php-util-buffer)
+;;; php-util-buffer.el ends here