;;; asm-mode.el --- mode for editing assembler code
-;; Copyright (C) 1991, 2003 Free Software Foundation, Inc.
+;; Copyright (C) 1991, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
+;; Free Software Foundation, Inc.
;; Author: Eric S. Raymond <esr@snark.thyrsus.com>
;; Maintainer: FSF
;; This file is part of GNU Emacs.
-;; GNU Emacs is free software; you can redistribute it and/or modify
+;; GNU Emacs 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 2, or (at your option)
-;; any later version.
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
(defgroup asm nil
"Mode for editing assembler code."
+ :link '(custom-group-link :tag "Font Lock Faces group" font-lock-faces)
:group 'languages)
(defcustom asm-comment-char ?\;
(defvar asm-mode-syntax-table
(let ((st (make-syntax-table)))
- (modify-syntax-entry ?\n ">" st)
- (modify-syntax-entry ?/ ". 14b" st)
- (modify-syntax-entry ?* ". 23b" st)
+ (modify-syntax-entry ?\n "> b" st)
+ (modify-syntax-entry ?/ ". 124b" st)
+ (modify-syntax-entry ?* ". 23" st)
st)
"Syntax table used while in Asm mode.")
;; Note that the comment character isn't set up until asm-mode is called.
(define-key map ":" 'asm-colon)
(define-key map "\C-c;" 'comment-region)
- (define-key map "\C-i" 'tab-to-tab-stop)
- (define-key map "\C-j" 'asm-newline)
- (define-key map "\C-m" 'asm-newline)
+ (define-key map "\C-j" 'newline-and-indent)
+ (define-key map "\C-m" 'newline-and-indent)
+ (define-key map [menu-bar] (make-sparse-keymap))
+ (define-key map [menu-bar asm-mode] (cons "Asm" map))
+ (define-key map [comment-region]
+ '(menu-item "Comment Region" comment-region
+ :help "Comment or uncomment each line in the region"))
+ (define-key map [newline-and-indent]
+ '(menu-item "Insert Newline and Indent" newline-and-indent
+ :help "Insert a newline, then indent according to major mode"))
+ (define-key map [asm-colon]
+ '(menu-item "Insert Colon" asm-colon
+ :help "Insert a colon; if it follows a label, delete the label's indentation"))
map)
"Keymap for Asm mode.")
(defconst asm-font-lock-keywords
- '(("^\\(\\(\\sw\\|\\s_\\)+\\)\\>:?[ \t]*\\(\\sw+\\(\\.\\sw+\\)*\\)?"
- (1 font-lock-function-name-face) (3 font-lock-keyword-face nil t))
- ("^\\((\\sw+)\\)?\\s +\\(\\(\\sw\\|\\s_\\)+\\(\\.\\sw+\\)*\\)"
- 2 font-lock-keyword-face))
- "Additional expressions to highlight in Assembler mode.")
-
-(defconst asm-code-level-empty-comment-pattern "^[\t ]+\\s<\\s< *$")
-(defconst asm-flush-left-empty-comment-pattern "^\\s<\\s<\\s< *$")
-(defconst asm-inline-empty-comment-pattern "^.+\\s<+ *$")
+ (append
+ '(("^\\(\\(\\sw\\|\\s_\\)+\\)\\>:?[ \t]*\\(\\sw+\\(\\.\\sw+\\)*\\)?"
+ (1 font-lock-function-name-face) (3 font-lock-keyword-face nil t))
+ ;; label started from ".".
+ ("^\\(\\.\\(\\sw\\|\\s_\\)+\\)\\>:"
+ 1 font-lock-function-name-face)
+ ("^\\((\\sw+)\\)?\\s +\\(\\(\\.?\\sw\\|\\s_\\)+\\(\\.\\sw+\\)*\\)"
+ 2 font-lock-keyword-face)
+ ;; directive started from ".".
+ ("^\\(\\.\\(\\sw\\|\\s_\\)+\\)\\>[^:]?"
+ 1 font-lock-keyword-face)
+ ;; %register
+ ("%\\sw+" . font-lock-variable-name-face))
+ cpp-font-lock-keywords)
+ "Additional expressions to highlight in Assembler mode.")
;;;###autoload
(defun asm-mode ()
(setq local-abbrev-table asm-mode-abbrev-table)
(make-local-variable 'font-lock-defaults)
(setq font-lock-defaults '(asm-font-lock-keywords))
+ (set (make-local-variable 'indent-line-function) 'asm-indent-line)
+ ;; Stay closer to the old TAB behavior (was tab-to-tab-stop).
+ (set (make-local-variable 'tab-always-indent) nil)
(run-hooks 'asm-mode-set-comment-hook)
;; Make our own local child of asm-mode-map
(use-local-map (nconc (make-sparse-keymap) asm-mode-map))
(local-set-key (vector asm-comment-char) 'asm-comment)
(set-syntax-table (make-syntax-table asm-mode-syntax-table))
- (modify-syntax-entry asm-comment-char "<")
+ (modify-syntax-entry asm-comment-char "< b")
(make-local-variable 'comment-start)
- (setq comment-start (string asm-comment-char ?\ ))
+ (setq comment-start (string asm-comment-char))
+ (make-local-variable 'comment-add)
+ (setq comment-add 1)
(make-local-variable 'comment-start-skip)
- (setq comment-start-skip "\\(?:\\s<+\\|/\\*+\\)[ \t]*")
+ (setq comment-start-skip "\\(?:\\s<+\\|/[/*]+\\)[ \t]*")
(make-local-variable 'comment-end-skip)
- (setq comment-end-skip "[ \t]*\\(\\s>\\|\\*+/\\)")
+ (setq comment-end-skip "[ \t]*\\(\\s>\\|\\*+/\\)")
(make-local-variable 'comment-end)
(setq comment-end "")
(setq fill-prefix "\t")
- (run-hooks 'asm-mode-hook))
-\f
+ (run-mode-hooks 'asm-mode-hook))
+
+(defun asm-indent-line ()
+ "Auto-indent the current line."
+ (interactive)
+ (let* ((savep (point))
+ (indent (condition-case nil
+ (save-excursion
+ (forward-line 0)
+ (skip-chars-forward " \t")
+ (if (>= (point) savep) (setq savep nil))
+ (max (asm-calculate-indentation) 0))
+ (error 0))))
+ (if savep
+ (save-excursion (indent-line-to indent))
+ (indent-line-to indent))))
+
+(defun asm-calculate-indentation ()
+ (or
+ ;; Flush labels to the left margin.
+ (and (looking-at "\\(\\sw\\|\\s_\\)+:") 0)
+ ;; Same thing for `;;;' comments.
+ (and (looking-at "\\s<\\s<\\s<") 0)
+ ;; Simple `;' comments go to the comment-column.
+ (and (looking-at "\\s<\\(\\S<\\|\\'\\)") comment-column)
+ ;; The rest goes at the first tab stop.
+ (or (car tab-stop-list) tab-width)))
+
(defun asm-colon ()
"Insert a colon; if it follows a label, delete the label's indentation."
(interactive)
- (save-excursion
- (beginning-of-line)
- (if (looking-at "[ \t]+\\(\\sw\\|\\s_\\)+$")
- (delete-horizontal-space)))
- (insert ":")
- (tab-to-tab-stop)
- )
-
-(defun asm-newline ()
- "Insert LFD + fill-prefix, to bring us back to code-indent level."
- (interactive)
- (if (eolp) (delete-horizontal-space))
- (insert "\n")
- (tab-to-tab-stop)
- )
-
-(defun asm-line-matches (pattern)
- (save-excursion
- (beginning-of-line)
- (looking-at pattern)))
-
-(defun asm-pop-comment-level ()
- ;; Delete an empty comment ending current line. Then set up for a new one,
- ;; on the current line if it was all comment, otherwise above it
- (end-of-line)
- (delete-horizontal-space)
- (while (= (preceding-char) asm-comment-char)
- (delete-backward-char 1))
- (delete-horizontal-space)
- (if (bolp)
- nil
- (beginning-of-line)
- (open-line 1)))
-
+ (let ((labelp nil))
+ (save-excursion
+ (skip-syntax-backward "w_")
+ (skip-syntax-backward " ")
+ (if (setq labelp (bolp)) (delete-horizontal-space)))
+ (call-interactively 'self-insert-command)
+ (when labelp
+ (delete-horizontal-space)
+ (tab-to-tab-stop))))
+
+;; Obsolete since Emacs-22.1.
+(defalias 'asm-newline 'newline-and-indent)
(defun asm-comment ()
"Convert an empty comment to a `larger' kind, or start a new one.
Suggested usage: while writing your code, trigger asm-comment
repeatedly until you are satisfied with the kind of comment."
(interactive)
+ (comment-normalize-vars)
+ (let (comempty comment)
+ (save-excursion
+ (beginning-of-line)
+ (with-no-warnings
+ (setq comment (comment-search-forward (line-end-position) t)))
+ (setq comempty (looking-at "[ \t]*$")))
+
(cond
;; Blank line? Then start comment at code indent level.
- ((asm-line-matches "^[ \t]*$")
- (delete-horizontal-space)
- (tab-to-tab-stop)
- (insert asm-comment-char comment-start))
-
- ;; Nonblank line with no comment chars in it?
- ;; Then start a comment at the current comment column
- ((asm-line-matches (format "^[^%c\n]+$" asm-comment-char))
+ ;; Just like `comment-dwim'. -stef
+ ((save-excursion (beginning-of-line) (looking-at "^[ \t]*$"))
+ (indent-according-to-mode)
+ (insert asm-comment-char asm-comment-char ?\ ))
+
+ ;; Nonblank line w/o comment => start a comment at comment-column.
+ ;; Also: point before the comment => jump inside.
+ ((or (null comment) (< (point) comment))
(indent-for-comment))
- ;; Flush-left comment present? Just insert character.
- ((asm-line-matches asm-flush-left-empty-comment-pattern)
+ ;; Flush-left or non-empty comment present => just insert character.
+ ((or (not comempty) (save-excursion (goto-char comment) (bolp)))
(insert asm-comment-char))
- ;; Empty code-level comment already present?
- ;; Then start flush-left comment, on line above if this one is nonempty.
- ((asm-line-matches asm-code-level-empty-comment-pattern)
- (asm-pop-comment-level)
- (insert asm-comment-char asm-comment-char comment-start))
-
- ;; Empty comment ends line?
- ;; Then make code-level comment, on line above if this one is nonempty.
- ((asm-line-matches asm-inline-empty-comment-pattern)
- (asm-pop-comment-level)
- (tab-to-tab-stop)
- (insert asm-comment-char comment-start))
+ ;; Empty code-level comment => upgrade to next comment level.
+ ((save-excursion (goto-char comment) (skip-chars-backward " \t") (bolp))
+ (goto-char comment)
+ (insert asm-comment-char)
+ (indent-for-comment))
- ;; If all else fails, insert character
+ ;; Empty comment ends non-empty code line => new comment above.
(t
- (insert asm-comment-char)))
- (end-of-line))
+ (goto-char comment)
+ (skip-chars-backward " \t")
+ (delete-region (point) (line-end-position))
+ (beginning-of-line) (insert "\n") (backward-char)
+ (asm-comment)))))
(provide 'asm-mode)
+;; arch-tag: 210e695f-f338-4376-8913-a4c5c72ac848
;;; asm-mode.el ends here