1 ;;; cc-compat.el --- cc-mode compatibility with c-mode.el confusion
3 ;; Copyright (C) 1985, 1987, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
4 ;; 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
5 ;; 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
7 ;; Authors: 1998- Martin Stjernholm
8 ;; 1994-1999 Barry A. Warsaw
9 ;; Maintainer: bug-cc-mode@gnu.org
10 ;; Created: August 1994, split from cc-mode.el
11 ;; Version: See cc-mode.el
12 ;; Keywords: c languages oop
14 ;; This file is part of GNU Emacs.
16 ;; GNU Emacs is free software; you can redistribute it and/or modify
17 ;; it under the terms of the GNU General Public License as published by
18 ;; the Free Software Foundation; either version 3, or (at your option)
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.
26 ;; You should have received a copy of the GNU General Public License
27 ;; along with this program; see the file COPYING. If not, see
28 ;; <http://www.gnu.org/licenses/>.
32 ;; Boring old c-mode.el (BOCM) is confusion and brain melt. cc-mode.el
33 ;; is clarity of thought and purity of chi. If you are still unwilling
34 ;; to accept enlightenment, this might help, or it may prolong your
37 ;; To use, add the following to your c-mode-hook:
39 ;; (require 'cc-compat)
40 ;; (c-set-style "BOCM")
42 ;; This file is completely unsupported! Although it has been patched
43 ;; superficially to keep pace with the rest of CC Mode, it hasn't been
44 ;; tested for a long time.
50 (if (and (boundp 'byte-compile-dest-file)
51 (stringp byte-compile-dest-file))
52 (cons (file-name-directory byte-compile-dest-file) load-path)
54 (load "cc-bytecomp" nil t)))
58 (cc-require 'cc-styles)
59 (cc-require 'cc-engine)
62 ;; In case c-mode.el isn't loaded
63 (defvar c-indent-level 2
64 "*Indentation of C statements with respect to containing block.")
65 (defvar c-brace-imaginary-offset 0
66 "*Imagined indentation of a C open brace that actually follows a statement.")
67 (defvar c-brace-offset 0
68 "*Extra indentation for braces, compared with other text in same context.")
69 (defvar c-argdecl-indent 5
70 "*Indentation level of declarations of C function arguments.")
71 (defvar c-label-offset -2
72 "*Offset of C label lines and case statements relative to usual indentation.")
73 (defvar c-continued-statement-offset 2
74 "*Extra indent for lines not starting new statements.")
75 (defvar c-continued-brace-offset 0
76 "*Extra indent for substatements that start with open-braces.
77 This is in addition to c-continued-statement-offset.")
81 ;; these offsets are taken by brute force testing c-mode.el, since
82 ;; there's no logic to what it does.
83 (let* ((offsets '(c-offsets-alist .
84 ((defun-block-intro . cc-block-intro-offset)
85 (statement-block-intro . cc-block-intro-offset)
88 (inline-open . c-brace-offset)
89 (block-open . c-brace-offset)
90 (block-close . cc-block-close-offset)
91 (brace-list-open . c-brace-offset)
92 (substatement-open . cc-substatement-open-offset)
93 (substatement . c-continued-statement-offset)
94 (knr-argdecl-intro . c-argdecl-indent)
95 (case-label . c-label-offset)
96 (access-label . c-label-offset)
97 (label . c-label-offset)
99 (c-add-style "BOCM" offsets))
102 (defun cc-block-intro-offset (langelem)
103 ;; taken directly from calculate-c-indent confusion
105 (c-backward-syntactic-ws)
106 (if (eq (char-before) ?{)
108 (goto-char (cdr langelem)))
109 (let* ((curcol (save-excursion
110 (goto-char (cdr langelem))
113 ;; If no previous statement, indent it relative to line
114 ;; brace is on. For open brace in column zero, don't let
115 ;; statement start there too. If c-indent-level is zero,
116 ;; use c-brace-offset + c-continued-statement-offset
117 ;; instead. For open-braces not the first thing in a line,
118 ;; add in c-brace-imaginary-offset.
119 (+ (if (and (bolp) (zerop c-indent-level))
120 (+ c-brace-offset c-continued-statement-offset)
122 ;; Move back over whitespace before the openbrace. If
123 ;; openbrace is not first nonwhite thing on the line,
124 ;; add the c-brace-imaginary-offset.
125 (progn (skip-chars-backward " \t")
126 (if (bolp) 0 c-brace-imaginary-offset))
127 ;; If the openbrace is preceded by a parenthesized exp,
128 ;; move to the beginning of that; possibly a different
131 (if (eq (char-before) ?\))
133 ;; Get initial indentation of the line we are on.
134 (current-indentation)))))
135 (- bocm-lossage curcol))))
138 (defun cc-block-close-offset (langelem)
140 (let* ((here (point))
143 (goto-char (cdr langelem))
146 (goto-char (cdr langelem))
147 (if (eq (char-after) ?{)
153 (c-forward-syntactic-ws))
155 (- bocm-lossage curcol
156 (if bracep 0 c-indent-level)))))
159 (defun cc-substatement-open-offset (langelem)
160 (+ c-continued-statement-offset c-continued-brace-offset))
163 (cc-provide 'cc-compat)
165 ;;; arch-tag: 564dab2f-e6ad-499c-a4a3-fedec3ecc192
166 ;;; cc-compat.el ends here