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;;; awk-mode.el --- AWK code editing commands for Emacs
;; Copyright (C) 1988, 1994, 1996 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 nil
"Syntax table in use in Awk-mode buffers.")
(if awk-mode-syntax-table
()
(setq awk-mode-syntax-table (make-syntax-table))
(modify-syntax-entry ?\\ "\\" awk-mode-syntax-table)
(modify-syntax-entry ?\n "> " awk-mode-syntax-table)
(modify-syntax-entry ?\f "> " awk-mode-syntax-table)
(modify-syntax-entry ?\# "< " awk-mode-syntax-table)
(modify-syntax-entry ?/ "." awk-mode-syntax-table)
(modify-syntax-entry ?* "." awk-mode-syntax-table)
(modify-syntax-entry ?+ "." awk-mode-syntax-table)
(modify-syntax-entry ?- "." awk-mode-syntax-table)
(modify-syntax-entry ?= "." awk-mode-syntax-table)
(modify-syntax-entry ?% "." awk-mode-syntax-table)
(modify-syntax-entry ?< "." awk-mode-syntax-table)
(modify-syntax-entry ?> "." awk-mode-syntax-table)
(modify-syntax-entry ?& "." awk-mode-syntax-table)
(modify-syntax-entry ?| "." awk-mode-syntax-table)
(modify-syntax-entry ?_ "_" awk-mode-syntax-table)
(modify-syntax-entry ?\' "\"" awk-mode-syntax-table))
(defvar awk-mode-abbrev-table nil
"Abbrev table in use in Awk-mode buffers.")
(define-abbrev-table 'awk-mode-abbrev-table ())
;; Regexps written with help from Peter Galbraith <galbraith@mixing.qc.dfo.ca>.
(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 (concat "\\<\\("
; ("ARGC" "ARGIND" "ARGV" "CONVFMT" "ENVIRON" "ERRNO"
; "FIELDWIDTHS" "FILENAME" "FNR" "FS" "IGNORECASE" "NF" "NR"
; "OFMT" "OFS" "ORS" "RLENGTH" "RS" "RSTART" "SUBSEP")
"ARG\\([CV]\\|IND\\)\\|CONVFMT\\|E\\(NVIRON\\|RRNO\\)\\|"
"F\\(I\\(ELDWIDTHS\\|LENAME\\)\\|NR\\|S\\)\\|IGNORECASE\\|"
"N[FR]\\|O\\(F\\(MT\\|S\\)\\|RS\\)\\|"
"R\\(LENGTH\\|S\\(\\|TART\\)\\)\\|SUBSEP"
"\\)\\>")
'font-lock-variable-name-face)
;;
;; Keywords.
(concat "\\<\\("
; ("BEGIN" "END" "break" "continue" "delete" "exit" "for"
; "getline" "if" "next" "print" "printf" "return" "while")
"BEGIN\\|END\\|break\\|continue\\|delete\\|exit\\|for\\|"
"getline\\|if\\|next\\|printf?\\|return\\|while"
"\\)\\>")
;;
;; Builtins.
(list (concat "\\<\\("
; ("atan2" "close" "cos" "ctime" "exp" "gsub" "index" "int"
; "length" "log" "match" "rand" "sin" "split" "sprintf"
; "sqrt" "srand" "sub" "substr" "system" "time"
; "tolower" "toupper")
"atan2\\|c\\(lose\\|os\\|time\\)\\|exp\\|gsub\\|"
"in\\(dex\\|t\\)\\|l\\(ength\\|og\\)\\|match\\|rand\\|"
"s\\(in\\|p\\(lit\\|rintf\\)\\|qrt\\|rand\\|"
"ub\\(\\|str\\)\\|ystem\\)\\|"
"t\\(ime\\|o\\(lower\\|upper\\)\\)"
"\\)(")
1 'font-lock-builtin-face)
;;
;; Operators. Is this too much?
(cons (mapconcat 'identity
'("&&" "||" "<=" "<" ">=" ">" "==" "!=" "!~" "~")
"\\|")
'font-lock-reference-face)
))
"Default expressions to highlight in AWK mode.")
;;;###autoload
(defun awk-mode ()
"Major mode for editing AWK code.
This is much like C mode except for the syntax of comments. It uses
the same keymap as C mode and has the same variables for customizing
indentation. It has its own abbrev table and its own syntax table.
Turning on AWK mode calls the value of the variable `awk-mode-hook'
with no args, if that value is non-nil."
(interactive)
(kill-all-local-variables)
(require 'cc-mode)
(use-local-map c-mode-map)
(setq major-mode 'awk-mode)
(setq mode-name "AWK")
(setq local-abbrev-table awk-mode-abbrev-table)
(set-syntax-table awk-mode-syntax-table)
(make-local-variable 'paragraph-start)
(setq paragraph-start (concat "$\\|" page-delimiter))
(make-local-variable 'paragraph-separate)
(setq paragraph-separate paragraph-start)
(make-local-variable 'paragraph-ignore-fill-prefix)
(setq paragraph-ignore-fill-prefix t)
(make-local-variable 'indent-line-function)
(setq indent-line-function 'c-indent-line)
(make-local-variable 'require-final-newline)
(setq require-final-newline t)
(make-local-variable 'comment-start)
(setq comment-start "# ")
(make-local-variable 'comment-end)
(setq comment-end "")
(make-local-variable 'comment-column)
(setq comment-column 32)
(make-local-variable 'comment-start-skip)
(setq comment-start-skip "#+ *")
(make-local-variable 'comment-indent-function)
(setq comment-indent-function 'c-comment-indent)
(make-local-variable 'font-lock-defaults)
(setq font-lock-defaults '(awk-font-lock-keywords nil nil ((?_ . "w"))))
(run-hooks 'awk-mode-hook))
(provide 'awk-mode)
;;; awk-mode.el ends here
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