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785eecbb RS |
1 | ;;; cc-compat.el --- cc-mode compatibility with c-mode.el confusion |
2 | ||
92ab3834 | 3 | ;; Copyright (C) 1985, 1987, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
5df4f04c | 4 | ;; 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
d7a0267c | 5 | ;; Free Software Foundation, Inc. |
785eecbb | 6 | |
d9e94c22 MS |
7 | ;; Authors: 1998- Martin Stjernholm |
8 | ;; 1994-1999 Barry A. Warsaw | |
6862d613 | 9 | ;; Maintainer: bug-cc-mode@gnu.org |
785eecbb | 10 | ;; Created: August 1994, split from cc-mode.el |
bd78fa1d CY |
11 | ;; Keywords: c languages |
12 | ;; Package: cc-mode | |
785eecbb RS |
13 | |
14 | ;; This file is part of GNU Emacs. | |
15 | ||
b1fc2b50 | 16 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
785eecbb | 17 | ;; it under the terms of the GNU General Public License as published by |
b1fc2b50 GM |
18 | ;; the Free Software Foundation, either version 3 of the License, or |
19 | ;; (at your option) any later version. | |
785eecbb RS |
20 | |
21 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
22 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | ;; GNU General Public License for more details. | |
25 | ||
26 | ;; You should have received a copy of the GNU General Public License | |
b1fc2b50 | 27 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
785eecbb RS |
28 | |
29 | ;;; Commentary: | |
30 | ;; | |
31 | ;; Boring old c-mode.el (BOCM) is confusion and brain melt. cc-mode.el | |
32 | ;; is clarity of thought and purity of chi. If you are still unwilling | |
33 | ;; to accept enlightenment, this might help, or it may prolong your | |
34 | ;; agony. | |
35 | ;; | |
36 | ;; To use, add the following to your c-mode-hook: | |
37 | ;; | |
38 | ;; (require 'cc-compat) | |
39 | ;; (c-set-style "BOCM") | |
130c507e GM |
40 | ;; |
41 | ;; This file is completely unsupported! Although it has been patched | |
42 | ;; superficially to keep pace with the rest of CC Mode, it hasn't been | |
43 | ;; tested for a long time. | |
785eecbb RS |
44 | |
45 | ;;; Code: | |
46 | ||
47 | (eval-when-compile | |
51f606de | 48 | (let ((load-path |
130c507e GM |
49 | (if (and (boundp 'byte-compile-dest-file) |
50 | (stringp byte-compile-dest-file)) | |
51 | (cons (file-name-directory byte-compile-dest-file) load-path) | |
51f606de | 52 | load-path))) |
d9e94c22 | 53 | (load "cc-bytecomp" nil t))) |
130c507e GM |
54 | |
55 | (cc-require 'cc-defs) | |
56 | (cc-require 'cc-vars) | |
57 | (cc-require 'cc-styles) | |
58 | (cc-require 'cc-engine) | |
785eecbb RS |
59 | |
60 | \f | |
61 | ;; In case c-mode.el isn't loaded | |
62 | (defvar c-indent-level 2 | |
63 | "*Indentation of C statements with respect to containing block.") | |
631c8020 RS |
64 | ;;;###autoload(put 'c-indent-level 'safe-local-variable 'integerp) |
65 | ||
785eecbb RS |
66 | (defvar c-brace-imaginary-offset 0 |
67 | "*Imagined indentation of a C open brace that actually follows a statement.") | |
68 | (defvar c-brace-offset 0 | |
69 | "*Extra indentation for braces, compared with other text in same context.") | |
70 | (defvar c-argdecl-indent 5 | |
71 | "*Indentation level of declarations of C function arguments.") | |
72 | (defvar c-label-offset -2 | |
73 | "*Offset of C label lines and case statements relative to usual indentation.") | |
74 | (defvar c-continued-statement-offset 2 | |
75 | "*Extra indent for lines not starting new statements.") | |
76 | (defvar c-continued-brace-offset 0 | |
77 | "*Extra indent for substatements that start with open-braces. | |
78 | This is in addition to c-continued-statement-offset.") | |
79 | ||
80 | ||
81 | \f | |
82 | ;; these offsets are taken by brute force testing c-mode.el, since | |
83 | ;; there's no logic to what it does. | |
84 | (let* ((offsets '(c-offsets-alist . | |
85 | ((defun-block-intro . cc-block-intro-offset) | |
86 | (statement-block-intro . cc-block-intro-offset) | |
87 | (defun-open . 0) | |
88 | (class-open . 0) | |
89 | (inline-open . c-brace-offset) | |
90 | (block-open . c-brace-offset) | |
91 | (block-close . cc-block-close-offset) | |
92 | (brace-list-open . c-brace-offset) | |
93 | (substatement-open . cc-substatement-open-offset) | |
94 | (substatement . c-continued-statement-offset) | |
95 | (knr-argdecl-intro . c-argdecl-indent) | |
96 | (case-label . c-label-offset) | |
97 | (access-label . c-label-offset) | |
98 | (label . c-label-offset) | |
99 | )))) | |
100 | (c-add-style "BOCM" offsets)) | |
101 | ||
102 | ||
103 | (defun cc-block-intro-offset (langelem) | |
104 | ;; taken directly from calculate-c-indent confusion | |
105 | (save-excursion | |
106 | (c-backward-syntactic-ws) | |
107 | (if (eq (char-before) ?{) | |
108 | (forward-char -1) | |
109 | (goto-char (cdr langelem))) | |
d9e94c22 | 110 | (let* ((curcol (save-excursion |
785eecbb RS |
111 | (goto-char (cdr langelem)) |
112 | (current-column))) | |
113 | (bocm-lossage | |
114 | ;; If no previous statement, indent it relative to line | |
115 | ;; brace is on. For open brace in column zero, don't let | |
116 | ;; statement start there too. If c-indent-level is zero, | |
117 | ;; use c-brace-offset + c-continued-statement-offset | |
118 | ;; instead. For open-braces not the first thing in a line, | |
119 | ;; add in c-brace-imaginary-offset. | |
120 | (+ (if (and (bolp) (zerop c-indent-level)) | |
121 | (+ c-brace-offset c-continued-statement-offset) | |
122 | c-indent-level) | |
123 | ;; Move back over whitespace before the openbrace. If | |
124 | ;; openbrace is not first nonwhite thing on the line, | |
125 | ;; add the c-brace-imaginary-offset. | |
126 | (progn (skip-chars-backward " \t") | |
127 | (if (bolp) 0 c-brace-imaginary-offset)) | |
128 | ;; If the openbrace is preceded by a parenthesized exp, | |
129 | ;; move to the beginning of that; possibly a different | |
130 | ;; line | |
131 | (progn | |
132 | (if (eq (char-before) ?\)) | |
0ec8351b | 133 | (c-forward-sexp -1)) |
785eecbb RS |
134 | ;; Get initial indentation of the line we are on. |
135 | (current-indentation))))) | |
136 | (- bocm-lossage curcol)))) | |
137 | ||
138 | ||
139 | (defun cc-block-close-offset (langelem) | |
140 | (save-excursion | |
141 | (let* ((here (point)) | |
d9e94c22 | 142 | bracep |
785eecbb RS |
143 | (curcol (progn |
144 | (goto-char (cdr langelem)) | |
145 | (current-column))) | |
146 | (bocm-lossage (progn | |
147 | (goto-char (cdr langelem)) | |
148 | (if (eq (char-after) ?{) | |
149 | (setq bracep t) | |
150 | (goto-char here) | |
151 | (beginning-of-line) | |
152 | (backward-up-list 1) | |
153 | (forward-char 1) | |
154 | (c-forward-syntactic-ws)) | |
155 | (current-column)))) | |
156 | (- bocm-lossage curcol | |
157 | (if bracep 0 c-indent-level))))) | |
d9e94c22 | 158 | |
785eecbb RS |
159 | |
160 | (defun cc-substatement-open-offset (langelem) | |
161 | (+ c-continued-statement-offset c-continued-brace-offset)) | |
162 | ||
163 | \f | |
130c507e | 164 | (cc-provide 'cc-compat) |
ab5796a9 | 165 | |
cbee283d | 166 | ;; arch-tag: 564dab2f-e6ad-499c-a4a3-fedec3ecc192 |
785eecbb | 167 | ;;; cc-compat.el ends here |