-;;; asm-mode.el --- mode for editing assembler code
-
-;; Copyright (C) 1991 Free Software Foundation, Inc.
-
-;; Author: Eric S. Raymond <esr@snark.thyrsus.com>
-;; Last-Modified: 14 Jul 1992
-;; Keywords: tools, languages
-
-;; @(#)asm-mode.el 1.7
-
-;; This file is part of GNU Emacs.
-
-;; 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.
-
-;; GNU Emacs is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-;; 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, 675 Mass Ave, Cambridge, MA 02139, USA.
-
-;;; Commentary:
-
-;; This mode was written by Eric S. Raymond <esr@snark.thyrsus.com>,
-;; inspired by an earlier asm-mode by Martin Neitzel.
-
-;; This minor mode is based on text mode. It defines a private abbrev table
-;; that can be used to save abbrevs for assembler mnemonics. It binds just
-;; five keys:
-;;
-;; TAB tab to next tab stop
-;; : outdent preceding label, tab to tab stop
-;; ; place or move comment
-;; C-j, C-m newline and tab to tab stop
-;;
-;; Code is indented to the first tab stop level.
-;; The ; key inserts copies of the value of asm-comment-char at an
-;; appropriate spot.
-
-;; This mode runs two hooks:
-;; 1) An asm-set-comment-hook before the part of the initialization
-;; depending on asm-comment-char, and
-;; 2) an asm-mode-hook at the end of initialization.
-
-;;; Code:
-
-(defvar asm-comment-char ?;
- "*The comment-start character assumed by asm-mode.")
-
-(defvar asm-mode-syntax-table nil
- "Syntax table used while in asm mode.")
-
-(defvar asm-mode-abbrev-table nil
- "Abbrev table used while in asm mode.")
-(define-abbrev-table 'asm-mode-abbrev-table ())
-
-(defvar asm-mode-map nil
- "Keymap for asm-mode")
-
-(if asm-mode-map
- nil
- (setq asm-mode-map (make-sparse-keymap))
- (define-key asm-mode-map ";" 'asm-comment)
- (define-key asm-mode-map ":" 'asm-colon)
- (define-key asm-mode-map "\C-i" 'tab-to-tab-stop)
- (define-key asm-mode-map "\C-j" 'asm-newline)
- (define-key asm-mode-map "\C-m" 'asm-newline)
- )
-
-(defvar asm-code-level-empty-comment-pattern nil)
-(defvar asm-flush-left-empty-comment-pattern nil)
-(defvar asm-inline-empty-comment-pattern nil)
-
-;;;###autoload
-(defun asm-mode ()
- "Major mode for editing typical assembler code.
-Features a private asm-mode-abbrev-table and the following bindings:
-
-\\[asm-colon]\toutdent a preceding label, tab to next tab stop.
-\\[tab-to-tab-stop]\ttab to next tab stop.
-\\[asm-newline]\tnewline, then tab to next tab stop.
-\\[asm-comment]\tsmart placement of assembler comments.
-
-The character used for making comments is set by the variable
-asm-comment-char (which defaults to ?;). You may want to set this
-appropriately for the assembler on your machine in defaults.el.
-
-Alternatively, you may set this variable in asm-set-comment-hook, which is
-called near the beginning of mode initialization.
-
-Turning on asm-mode calls the value of the variable asm-mode-hook,
-if that value is non-nil, at the end of initialization.
-
-Special commands:\\{asm-mode-map}
-"
- (interactive)
- (kill-all-local-variables)
- (use-local-map asm-mode-map)
- (setq mode-name "Assembler")
- (setq major-mode 'asm-mode)
- (setq local-abbrev-table asm-mode-abbrev-table)
- (make-local-variable 'asm-mode-syntax-table)
- (setq asm-mode-syntax-table (make-syntax-table))
- (set-syntax-table asm-mode-syntax-table)
- (run-hooks 'asm-mode-set-comment-hook)
- (modify-syntax-entry asm-comment-char
- "<" asm-mode-syntax-table)
- (modify-syntax-entry ?\n
- ">" asm-mode-syntax-table)
- (let ((cs (regexp-quote (char-to-string asm-comment-char))))
- (make-local-variable 'comment-start)
- (setq comment-start (concat cs " "))
- (make-local-variable 'comment-start-skip)
- (setq comment-start-skip (concat cs "+[ \t]*"))
- (setq asm-inline-empty-comment-pattern (concat "^.+" cs "+ *$"))
- (setq asm-code-level-empty-comment-pattern (concat "^[\t ]+" cs cs " *$"))
- (setq asm-flush-left-empty-comment-pattern (concat "^" cs cs cs " *$"))
- )
- (make-local-variable 'comment-end)
- (setq comment-end "")
- (make-local-variable 'comment-column)
- (setq comment-column 32)
- (auto-fill-mode 1)
- (setq fill-prefix "\t")
- (run-hooks 'asm-mode-hook)
- )
-
-\f
-(defun asm-colon ()
- "Insert a colon; if it follows a label, delete the label's indentation."
- (interactive)
- (save-excursion
- (beginning-of-line)
- (if (looking-at "[ \t]+\\(\\sw\\|\\s_\\)+$")
- (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 &optional withcomment)
- (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))
- )
-
-
-(defun asm-comment ()
- "Convert an empty comment to a `larger' kind, or start a new one.
-These are the known comment classes:
-
- 1 -- comment to the right of the code (at the comment-column)
- 2 -- comment on its own line, indented like code
- 3 -- comment on its own line, beginning at the left-most column.
-
-Suggested usage: while writing your code, trigger asm-comment
-repeatedly until you are satisfied with the kind of comment."
- (interactive)
- (cond
-
- ;; Blank line? Then start comment at code indent level.
- ((asm-line-matches "^[ \t]*$")
- (delete-horizontal-space)
- (tab-to-tab-stop)
- (insert asm-comment-char comment-start))
-
- ;; Nonblank line with no comment chars in it?
- ;; Then start a comment at the current comment column
- ((asm-line-matches (format "^[^%c]+$" asm-comment-char))
- (indent-for-comment))
-
- ;; Flush-left comment present? Just insert character.
- ((asm-line-matches asm-flush-left-empty-comment-pattern)
- (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))
-
- ;; If all else fails, insert character
- (t
- (insert asm-comment-char))
-
- )
- (end-of-line))
-
-;;; asm-mode.el ends here
+;;; asm-mode.el --- mode for editing assembler code
+
+;; Copyright (C) 1991, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
+;; Free Software Foundation, Inc.
+
+;; Author: Eric S. Raymond <esr@snark.thyrsus.com>
+;; Maintainer: FSF
+;; Keywords: tools, languages
+
+;; This file is part of GNU Emacs.
+
+;; 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 3, 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
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; 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., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+
+;;; Commentary:
+
+;; This mode was written by Eric S. Raymond <esr@snark.thyrsus.com>,
+;; inspired by an earlier asm-mode by Martin Neitzel.
+
+;; This minor mode is based on text mode. It defines a private abbrev table
+;; that can be used to save abbrevs for assembler mnemonics. It binds just
+;; five keys:
+;;
+;; TAB tab to next tab stop
+;; : outdent preceding label, tab to tab stop
+;; comment char place or move comment
+;; asm-comment-char specifies which character this is;
+;; you can use a different character in different
+;; Asm mode buffers.
+;; C-j, C-m newline and tab to tab stop
+;;
+;; Code is indented to the first tab stop level.
+
+;; This mode runs two hooks:
+;; 1) An asm-mode-set-comment-hook before the part of the initialization
+;; depending on asm-comment-char, and
+;; 2) an asm-mode-hook at the end of initialization.
+
+;;; Code:
+
+(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 ?\;
+ "*The comment-start character assumed by Asm mode."
+ :type 'character
+ :group 'asm)
+
+(defvar asm-mode-syntax-table
+ (let ((st (make-syntax-table)))
+ (modify-syntax-entry ?\n "> b" st)
+ (modify-syntax-entry ?/ ". 124b" st)
+ (modify-syntax-entry ?* ". 23" st)
+ st)
+ "Syntax table used while in Asm mode.")
+
+(defvar asm-mode-abbrev-table nil
+ "Abbrev table used while in Asm mode.")
+(define-abbrev-table 'asm-mode-abbrev-table ())
+
+(defvar asm-mode-map
+ (let ((map (make-sparse-keymap)))
+ ;; 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-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
+ (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 ()
+ "Major mode for editing typical assembler code.
+Features a private abbrev table and the following bindings:
+
+\\[asm-colon]\toutdent a preceding label, tab to next tab stop.
+\\[tab-to-tab-stop]\ttab to next tab stop.
+\\[asm-newline]\tnewline, then tab to next tab stop.
+\\[asm-comment]\tsmart placement of assembler comments.
+
+The character used for making comments is set by the variable
+`asm-comment-char' (which defaults to `?\\;').
+
+Alternatively, you may set this variable in `asm-mode-set-comment-hook',
+which is called near the beginning of mode initialization.
+
+Turning on Asm mode runs the hook `asm-mode-hook' at the end of initialization.
+
+Special commands:
+\\{asm-mode-map}"
+ (interactive)
+ (kill-all-local-variables)
+ (setq mode-name "Assembler")
+ (setq major-mode '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
+ ;; so we can define our own comment character.
+ (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 "< b")
+
+ (make-local-variable 'comment-start)
+ (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]*")
+ (make-local-variable 'comment-end-skip)
+ (setq comment-end-skip "[ \t]*\\(\\s>\\|\\*+/\\)")
+ (make-local-variable 'comment-end)
+ (setq comment-end "")
+ (setq fill-prefix "\t")
+ (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)
+ (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.
+These are the known comment classes:
+
+ 1 -- comment to the right of the code (at the comment-column)
+ 2 -- comment on its own line, indented like code
+ 3 -- comment on its own line, beginning at the left-most column.
+
+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]*$")))
+
+ (cond
+
+ ;; Blank line? Then start comment at code indent level.
+ ;; Just like `comment-dwim'. -stef
+ ((save-excursion (beginning-of-line) (looking-at "^[ \t]*$"))
+ (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 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 => 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))
+
+ ;; Empty comment ends non-empty code line => new comment above.
+ (t
+ (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
HCoop / bpt / emacs.git / blobdiff