1 | ;;; Copyright (C) 2006 Magnus Henoch |
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2 | ;;; |
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3 | ;;; This program is free software; you can redistribute it and/or |
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4 | ;;; modify it under the terms of the GNU General Public License as |
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5 | ;;; published by the Free Software Foundation; either version 2 of the |
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6 | ;;; License, or (at your option) any later version. |
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7 | ;;; |
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8 | ;;; This program is distributed in the hope that it will be useful, |
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9 | ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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11 | ;;; General Public License for more details. |
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12 | ;;; |
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13 | ;;; You should have received a copy of the GNU General Public License |
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14 | ;;; along with this program; if not, write to the Free Software |
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15 | ;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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16 | |
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17 | (in-package :darcs) |
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18 | |
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19 | (defgeneric invert-patch (patch) |
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20 | (:documentation "Create a patch that is the inverse of PATCH.")) |
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21 | |
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22 | (defmethod invert-patch ((patch named-patch)) |
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23 | (make-instance 'named-patch |
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24 | :patchinfo (invert-patchinfo (named-patch-patchinfo patch)) |
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25 | :dependencies (mapcar #'invert-patchinfo |
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26 | (named-patch-dependencies patch)) |
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27 | :patch (invert-patch (named-patch-patch patch)))) |
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28 | |
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29 | (defmethod invert-patch ((patch change-pref-patch)) |
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30 | (make-instance 'change-pref-patch :pref (change-pref-which patch) |
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31 | :from (change-pref-to patch) |
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32 | :to (change-pref-from patch))) |
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33 | |
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34 | (defmethod invert-patch ((patch move-patch)) |
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35 | (make-instance 'move-patch :from (patch-move-to patch) |
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36 | :to (patch-move-from patch))) |
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37 | |
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38 | (defmethod invert-patch ((patch composite-patch)) |
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39 | (make-instance 'composite-patch |
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40 | :patches (mapcar #'invert-patch |
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41 | (reverse (patches patch))))) |
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42 | |
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43 | (defmethod invert-patch ((patch split-patch)) |
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44 | (make-instance 'split-patch |
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45 | :patches (mapcar #'invert-patch |
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46 | (reverse (patches patch))))) |
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47 | |
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48 | (defmethod invert-patch :around ((patch file-patch)) |
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49 | (let ((inverted-patch (call-next-method))) |
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50 | (setf (patch-filename inverted-patch) (patch-filename patch)) |
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51 | inverted-patch)) |
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52 | |
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53 | (defmethod invert-patch ((patch hunk-patch)) |
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54 | (make-instance 'hunk-patch |
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55 | :line-number (hunk-line-number patch) |
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56 | :old (hunk-new-lines patch) |
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57 | :new (hunk-old-lines patch))) |
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58 | |
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59 | (defmethod invert-patch ((patch add-file-patch)) |
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60 | (make-instance 'rm-file-patch)) |
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61 | |
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62 | (defmethod invert-patch ((patch rm-file-patch)) |
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63 | (make-instance 'add-file-patch)) |
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64 | |
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65 | (defmethod invert-patch ((patch binary-patch)) |
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66 | (make-instance 'binary-patch |
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67 | :oldhex (binary-newhex patch) |
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68 | :newhex (binary-oldhex patch))) |
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69 | |
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70 | (defmethod invert-patch ((patch token-replace-patch)) |
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71 | (make-instance 'token-replace-patch |
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72 | :regexp (token-regexp patch) |
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73 | :old-token (old-token patch) |
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74 | :new-token (new-token patch))) |
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75 | |
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76 | (defmethod invert-patch :around ((patch directory-patch)) |
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77 | (let ((inverted-patch (call-next-method))) |
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78 | (setf (patch-directory inverted-patch) (patch-directory patch)) |
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79 | inverted-patch)) |
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80 | |
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81 | (defmethod invert-patch ((patch add-dir-patch)) |
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82 | (make-instance 'rm-dir-patch)) |
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83 | |
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84 | (defmethod invert-patch ((patch rm-dir-patch)) |
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85 | (make-instance 'add-dir-patch)) |
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86 | |
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87 | (defmethod invert-patch ((patch merger-patch)) |
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88 | (make-instance 'merger-patch |
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89 | :version (merger-version patch) |
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90 | :first (merger-first patch) |
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91 | :second (merger-second patch) |
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92 | :undo (merger-undo patch) |
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93 | :unwindings (unwind patch) |
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94 | :inverted (not (merger-inverted patch)))) |
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