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1 | ;;; cc-compat.el --- cc-mode compatibility with c-mode.el confusion |
2 | ||
ba318903 | 3 | ;; Copyright (C) 1985, 1987, 1992-2014 Free Software Foundation, Inc. |
785eecbb | 4 | |
d9e94c22 MS |
5 | ;; Authors: 1998- Martin Stjernholm |
6 | ;; 1994-1999 Barry A. Warsaw | |
6862d613 | 7 | ;; Maintainer: bug-cc-mode@gnu.org |
785eecbb | 8 | ;; Created: August 1994, split from cc-mode.el |
bd78fa1d CY |
9 | ;; Keywords: c languages |
10 | ;; Package: cc-mode | |
785eecbb RS |
11 | |
12 | ;; This file is part of GNU Emacs. | |
13 | ||
b1fc2b50 | 14 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
785eecbb | 15 | ;; it under the terms of the GNU General Public License as published by |
b1fc2b50 GM |
16 | ;; the Free Software Foundation, either version 3 of the License, or |
17 | ;; (at your option) any later version. | |
785eecbb RS |
18 | |
19 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
20 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | ;; GNU General Public License for more details. | |
23 | ||
24 | ;; You should have received a copy of the GNU General Public License | |
b1fc2b50 | 25 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
785eecbb RS |
26 | |
27 | ;;; Commentary: | |
28 | ;; | |
29 | ;; Boring old c-mode.el (BOCM) is confusion and brain melt. cc-mode.el | |
30 | ;; is clarity of thought and purity of chi. If you are still unwilling | |
31 | ;; to accept enlightenment, this might help, or it may prolong your | |
32 | ;; agony. | |
33 | ;; | |
34 | ;; To use, add the following to your c-mode-hook: | |
35 | ;; | |
36 | ;; (require 'cc-compat) | |
37 | ;; (c-set-style "BOCM") | |
130c507e GM |
38 | ;; |
39 | ;; This file is completely unsupported! Although it has been patched | |
40 | ;; superficially to keep pace with the rest of CC Mode, it hasn't been | |
41 | ;; tested for a long time. | |
785eecbb RS |
42 | |
43 | ;;; Code: | |
44 | ||
45 | (eval-when-compile | |
51f606de | 46 | (let ((load-path |
130c507e GM |
47 | (if (and (boundp 'byte-compile-dest-file) |
48 | (stringp byte-compile-dest-file)) | |
49 | (cons (file-name-directory byte-compile-dest-file) load-path) | |
51f606de | 50 | load-path))) |
d9e94c22 | 51 | (load "cc-bytecomp" nil t))) |
130c507e GM |
52 | |
53 | (cc-require 'cc-defs) | |
54 | (cc-require 'cc-vars) | |
55 | (cc-require 'cc-styles) | |
56 | (cc-require 'cc-engine) | |
785eecbb RS |
57 | |
58 | \f | |
59 | ;; In case c-mode.el isn't loaded | |
60 | (defvar c-indent-level 2 | |
61 | "*Indentation of C statements with respect to containing block.") | |
631c8020 RS |
62 | ;;;###autoload(put 'c-indent-level 'safe-local-variable 'integerp) |
63 | ||
785eecbb RS |
64 | (defvar c-brace-imaginary-offset 0 |
65 | "*Imagined indentation of a C open brace that actually follows a statement.") | |
66 | (defvar c-brace-offset 0 | |
67 | "*Extra indentation for braces, compared with other text in same context.") | |
68 | (defvar c-argdecl-indent 5 | |
69 | "*Indentation level of declarations of C function arguments.") | |
70 | (defvar c-label-offset -2 | |
71 | "*Offset of C label lines and case statements relative to usual indentation.") | |
72 | (defvar c-continued-statement-offset 2 | |
73 | "*Extra indent for lines not starting new statements.") | |
74 | (defvar c-continued-brace-offset 0 | |
75 | "*Extra indent for substatements that start with open-braces. | |
76 | This is in addition to c-continued-statement-offset.") | |
77 | ||
78 | ||
79 | \f | |
80 | ;; these offsets are taken by brute force testing c-mode.el, since | |
81 | ;; there's no logic to what it does. | |
82 | (let* ((offsets '(c-offsets-alist . | |
83 | ((defun-block-intro . cc-block-intro-offset) | |
84 | (statement-block-intro . cc-block-intro-offset) | |
85 | (defun-open . 0) | |
86 | (class-open . 0) | |
87 | (inline-open . c-brace-offset) | |
88 | (block-open . c-brace-offset) | |
89 | (block-close . cc-block-close-offset) | |
90 | (brace-list-open . c-brace-offset) | |
91 | (substatement-open . cc-substatement-open-offset) | |
92 | (substatement . c-continued-statement-offset) | |
93 | (knr-argdecl-intro . c-argdecl-indent) | |
94 | (case-label . c-label-offset) | |
95 | (access-label . c-label-offset) | |
96 | (label . c-label-offset) | |
97 | )))) | |
98 | (c-add-style "BOCM" offsets)) | |
99 | ||
100 | ||
101 | (defun cc-block-intro-offset (langelem) | |
102 | ;; taken directly from calculate-c-indent confusion | |
103 | (save-excursion | |
104 | (c-backward-syntactic-ws) | |
105 | (if (eq (char-before) ?{) | |
106 | (forward-char -1) | |
107 | (goto-char (cdr langelem))) | |
d9e94c22 | 108 | (let* ((curcol (save-excursion |
785eecbb RS |
109 | (goto-char (cdr langelem)) |
110 | (current-column))) | |
111 | (bocm-lossage | |
112 | ;; If no previous statement, indent it relative to line | |
113 | ;; brace is on. For open brace in column zero, don't let | |
114 | ;; statement start there too. If c-indent-level is zero, | |
115 | ;; use c-brace-offset + c-continued-statement-offset | |
116 | ;; instead. For open-braces not the first thing in a line, | |
117 | ;; add in c-brace-imaginary-offset. | |
118 | (+ (if (and (bolp) (zerop c-indent-level)) | |
119 | (+ c-brace-offset c-continued-statement-offset) | |
120 | c-indent-level) | |
121 | ;; Move back over whitespace before the openbrace. If | |
122 | ;; openbrace is not first nonwhite thing on the line, | |
123 | ;; add the c-brace-imaginary-offset. | |
124 | (progn (skip-chars-backward " \t") | |
125 | (if (bolp) 0 c-brace-imaginary-offset)) | |
126 | ;; If the openbrace is preceded by a parenthesized exp, | |
127 | ;; move to the beginning of that; possibly a different | |
128 | ;; line | |
129 | (progn | |
130 | (if (eq (char-before) ?\)) | |
0ec8351b | 131 | (c-forward-sexp -1)) |
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132 | ;; Get initial indentation of the line we are on. |
133 | (current-indentation))))) | |
134 | (- bocm-lossage curcol)))) | |
135 | ||
136 | ||
137 | (defun cc-block-close-offset (langelem) | |
138 | (save-excursion | |
139 | (let* ((here (point)) | |
d9e94c22 | 140 | bracep |
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141 | (curcol (progn |
142 | (goto-char (cdr langelem)) | |
143 | (current-column))) | |
144 | (bocm-lossage (progn | |
145 | (goto-char (cdr langelem)) | |
146 | (if (eq (char-after) ?{) | |
147 | (setq bracep t) | |
148 | (goto-char here) | |
149 | (beginning-of-line) | |
150 | (backward-up-list 1) | |
151 | (forward-char 1) | |
152 | (c-forward-syntactic-ws)) | |
153 | (current-column)))) | |
154 | (- bocm-lossage curcol | |
155 | (if bracep 0 c-indent-level))))) | |
d9e94c22 | 156 | |
785eecbb RS |
157 | |
158 | (defun cc-substatement-open-offset (langelem) | |
159 | (+ c-continued-statement-offset c-continued-brace-offset)) | |
160 | ||
161 | \f | |
130c507e | 162 | (cc-provide 'cc-compat) |
ab5796a9 | 163 | |
785eecbb | 164 | ;;; cc-compat.el ends here |