;;; awk-mode.el --- AWK code editing commands for Emacs ;; Copyright (C) 1988,94,96,2000 Free Software Foundation, Inc. ;; Maintainer: FSF ;; Keywords: unix, 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 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, Inc., 59 Temple Place - Suite 330, ;; Boston, MA 02111-1307, USA. ;;; Commentary: ;; Sets up C-mode with support for awk-style #-comments and a lightly ;; hacked syntax table. ;;; Code: (defvar awk-mode-syntax-table (let ((st (make-syntax-table))) (modify-syntax-entry ?\\ "\\" st) (modify-syntax-entry ?\n "> " st) (modify-syntax-entry ?\f "> " st) (modify-syntax-entry ?\# "< " st) ;; / can delimit regexes or be a division operator. We assume that it is ;; more commonly used for regexes and fix the remaining cases with ;; `font-lock-syntactic-keywords'. (modify-syntax-entry ?/ "\"" st) (modify-syntax-entry ?* "." st) (modify-syntax-entry ?+ "." st) (modify-syntax-entry ?- "." st) (modify-syntax-entry ?= "." st) (modify-syntax-entry ?% "." st) (modify-syntax-entry ?< "." st) (modify-syntax-entry ?> "." st) (modify-syntax-entry ?& "." st) (modify-syntax-entry ?| "." st) (modify-syntax-entry ?_ "_" st) (modify-syntax-entry ?\' "\"" st) st) "Syntax table in use in `awk-mode' buffers.") ;; Regexps written with help from Peter Galbraith . (defconst awk-font-lock-keywords (eval-when-compile (list ;; ;; Function names. '("^[ \t]*\\(function\\)\\>[ \t]*\\(\\sw+\\)?" (1 font-lock-keyword-face) (2 font-lock-function-name-face nil t)) ;; ;; Variable names. (cons (regexp-opt '("ARGC" "ARGIND" "ARGV" "CONVFMT" "ENVIRON" "ERRNO" "FIELDWIDTHS" "FILENAME" "FNR" "FS" "IGNORECASE" "NF" "NR" "OFMT" "OFS" "ORS" "RLENGTH" "RS" "RSTART" "SUBSEP") 'words) 'font-lock-variable-name-face) ;; ;; Keywords. (regexp-opt '("BEGIN" "END" "break" "continue" "delete" "exit" "else" "for" "getline" "if" "next" "print" "printf" "return" "while") 'words) ;; ;; Builtins. (list (regexp-opt '("atan2" "close" "cos" "ctime" "exp" "gsub" "index" "int" "length" "log" "match" "rand" "sin" "split" "sprintf" "sqrt" "srand" "sub" "substr" "system" "time" "tolower" "toupper") 'words) 1 'font-lock-builtin-face) ;; ;; Operators. Is this too much? (cons (regexp-opt '("&&" "||" "<=" "<" ">=" ">" "==" "!=" "!~" "~")) 'font-lock-constant-face) )) "Default expressions to highlight in AWK mode.") (require 'syntax) (defconst awk-font-lock-syntactic-keywords ;; `/' is mostly used for /.../ regular expressions, but is also ;; used as a division operator. Distinguishing between the two is ;; a pain in the youknowwhat. ;; '(("\\(^\\|[<=>-+*%/!^,~(?:|&]\\)\\s-*\\(/\\)\\([^/\n\\]\\|\\\\.\\)*\\(/\\)" ;; (2 "\"") (4 "\""))) '(("[^<=>-+*%/!^,~(?:|& \t\n\f]\\s-*\\(/\\)" (1 (unless (nth 3 (syntax-ppss (match-beginning 1))) ".")))) "Syntactic keywords for `awk-mode'.") ;; No longer autoloaded since it might clobber the autoload directive in CC Mode. (define-derived-mode awk-mode c-mode "AWK" "Major mode for editing AWK code. This is much like C mode except for the syntax of comments. Its keymap inherits from C mode's and it has the same variables for customizing indentation. It has its own abbrev table and its own syntax table. Turning on AWK mode runs `awk-mode-hook'." (set (make-local-variable 'paragraph-start) (concat "$\\|" page-delimiter)) (set (make-local-variable 'paragraph-separate) paragraph-start) (set (make-local-variable 'comment-start) "# ") (set (make-local-variable 'comment-end) "") (set (make-local-variable 'comment-start-skip) "#+ *") (setq font-lock-defaults '(awk-font-lock-keywords nil nil ((?_ . "w")) nil (parse-sexp-lookup-properties . t) (font-lock-syntactic-keywords . awk-font-lock-syntactic-keywords)))) (provide 'awk-mode) ;;; awk-mode.el ends here