1 ;;; fortran.el --- Fortran mode for GNU Emacs
3 ;;; Copyright (c) 1986, 1993, 1994, 1995 Free Software Foundation, Inc.
5 ;; Author: Michael D. Prange <prange@erl.mit.edu>
6 ;; Maintainer: bug-fortran-mode@erl.mit.edu
7 ;; Version 1.30.5.1 (Sept 16, 1994)
10 ;; This file is part of GNU Emacs.
12 ;; GNU Emacs is free software; you can redistribute it and/or modify
13 ;; it under the terms of the GNU General Public License as published by
14 ;; the Free Software Foundation; either version 2, or (at your option)
17 ;; GNU Emacs is distributed in the hope that it will be useful,
18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ;; GNU General Public License for more details.
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with GNU Emacs; see the file COPYING. If not, write to
24 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
28 ;; Fortran mode has been upgraded and is now maintained by Stephen A. Wood
29 ;; (saw@cebaf.gov). It now will use either fixed format continuation line
30 ;; markers (character in 6th column), or tab format continuation line style
31 ;; (digit after a TAB character.) A auto-fill mode has been added to
32 ;; automatically wrap fortran lines that get too long.
34 ;; We acknowledge many contributions and valuable suggestions by
35 ;; Lawrence R. Dodd, Ralf Fassel, Ralph Finch, Stephen Gildea,
36 ;; Dr. Anil Gokhale, Ulrich Mueller, Mark Neale, Eric Prestemon,
37 ;; Gary Sabot and Richard Stallman.
39 ;;; This file may be used with GNU Emacs version 18.xx if the following
40 ;;; variable and function substitutions are made.
42 ;;; frame-width with screen-width
43 ;;; auto-fill-function with auto-fill-hook
44 ;;; comment-indent-function with comment-indent-hook
45 ;;; (setq unread-command-events (list c)) with (setq unread-command-char c)
47 ;;; Bugs to bug-fortran-mode@erl.mit.edu
49 (defconst fortran-mode-version "version 1.30.5.1")
54 (defvar fortran-tab-mode-default nil
55 "*Default tabbing/carriage control style for empty files in Fortran mode.
56 A value of t specifies tab-digit style of continuation control.
57 A value of nil specifies that continuation lines are marked
58 with a character in column 6.")
60 ;; Buffer local, used to display mode line.
61 (defvar fortran-tab-mode-string nil
62 "String to appear in mode line when TAB format mode is on.")
64 (defvar fortran-do-indent 3
65 "*Extra indentation applied to DO blocks.")
67 (defvar fortran-if-indent 3
68 "*Extra indentation applied to IF blocks.")
70 (defvar fortran-structure-indent 3
71 "*Extra indentation applied to STRUCTURE, UNION, MAP and INTERFACE blocks.")
73 (defvar fortran-continuation-indent 5
74 "*Extra indentation applied to Fortran continuation lines.")
76 (defvar fortran-comment-indent-style 'fixed
77 "*nil forces comment lines not to be touched,
78 'fixed makes fixed comment indentation to `fortran-comment-line-extra-indent'
79 columns beyond `fortran-minimum-statement-indent-fixed' (for
80 `indent-tabs-mode' of nil) or `fortran-minimum-statement-indent-tab' (for
81 `indent-tabs-mode' of t), and 'relative indents to current
82 Fortran indentation plus `fortran-comment-line-extra-indent'.")
84 (defvar fortran-comment-line-extra-indent 0
85 "*Amount of extra indentation for text within full-line comments.")
87 (defvar comment-line-start nil
88 "*Delimiter inserted to start new full-line comment.")
90 (defvar comment-line-start-skip nil
91 "*Regexp to match the start of a full-line comment.")
93 (defvar fortran-minimum-statement-indent-fixed 6
94 "*Minimum statement indentation for fixed format continuation style.")
96 (defvar fortran-minimum-statement-indent-tab (max tab-width 6)
97 "*Minimum statement indentation for TAB format continuation style.")
99 ;; Note that this is documented in the v18 manuals as being a string
100 ;; of length one rather than a single character.
101 ;; The code in this file accepts either format for compatibility.
102 (defvar fortran-comment-indent-char " "
103 "*Single-character string inserted for Fortran comment indentation.
106 (defvar fortran-line-number-indent 1
107 "*Maximum indentation for Fortran line numbers.
108 5 means right-justify them within their five-column field.")
110 (defvar fortran-check-all-num-for-matching-do nil
111 "*Non-nil causes all numbered lines to be treated as possible DO loop ends.")
113 (defvar fortran-blink-matching-if nil
114 "*Non-nil causes \\[fortran-indent-line] on ENDIF statement to blink on matching IF.
115 Also, from an ENDDO statement blink on matching DO [WHILE] statement.")
117 (defvar fortran-continuation-string "$"
118 "*Single-character string used for Fortran continuation lines.
119 In fixed format continuation style, this character is inserted in
120 column 6 by \\[fortran-split-line] to begin a continuation line.
121 Also, if \\[fortran-indent-line] finds this at the beginning of a line, it will
122 convert the line into a continuation line of the appropriate style.
125 (defvar fortran-comment-region "c$$$"
126 "*String inserted by \\[fortran-comment-region]\
127 at start of each line in region.")
129 (defvar fortran-electric-line-number t
130 "*Non-nil causes line number digits to be moved to the correct column as\
133 (defvar fortran-startup-message t
134 "*Non-nil displays a startup message when Fortran mode is first called.")
136 (defvar fortran-column-ruler-fixed
137 "0 4 6 10 20 30 40 5\
139 \[ ]|{ | | | | | | | | \
141 "*String displayed above current line by \\[fortran-column-ruler].
142 This variable used in fixed format mode.")
144 (defvar fortran-column-ruler-tab
147 \[ ]| { | | | | | | | | \
149 "*String displayed above current line by \\[fortran-column-ruler].
150 This variable used in TAB format mode.")
152 (defconst bug-fortran-mode "bug-fortran-mode@erl.mit.edu"
153 "Address of mailing list for Fortran mode bugs.")
155 (defvar fortran-mode-syntax-table nil
156 "Syntax table in use in Fortran mode buffers.")
158 (defvar fortran-analyze-depth 100
159 "Number of lines to scan to determine whether to use fixed or TAB format\
162 (defvar fortran-break-before-delimiters t
163 "*Non-nil causes `fortran-do-auto-fill' to break lines before delimiters.")
165 (if fortran-mode-syntax-table
167 (setq fortran-mode-syntax-table (make-syntax-table))
168 (modify-syntax-entry ?\; "w" fortran-mode-syntax-table)
169 (modify-syntax-entry ?\r " " fortran-mode-syntax-table)
170 (modify-syntax-entry ?+ "." fortran-mode-syntax-table)
171 (modify-syntax-entry ?- "." fortran-mode-syntax-table)
172 (modify-syntax-entry ?= "." fortran-mode-syntax-table)
173 (modify-syntax-entry ?* "." fortran-mode-syntax-table)
174 (modify-syntax-entry ?/ "." fortran-mode-syntax-table)
175 (modify-syntax-entry ?\' "\"" fortran-mode-syntax-table)
176 (modify-syntax-entry ?\" "\"" fortran-mode-syntax-table)
177 (modify-syntax-entry ?\\ "/" fortran-mode-syntax-table)
178 (modify-syntax-entry ?. "w" fortran-mode-syntax-table)
179 (modify-syntax-entry ?_ "w" fortran-mode-syntax-table)
180 (modify-syntax-entry ?\! "<" fortran-mode-syntax-table)
181 (modify-syntax-entry ?\n ">" fortran-mode-syntax-table))
183 ;; Comments are real pain in Fortran because there is no way to represent the
184 ;; standard comment syntax in an Emacs syntax table (we can for VAX-style).
185 ;; Therefore an unmatched quote in a standard comment will throw fontification
186 ;; off on the wrong track. So we do syntactic fontification with regexps.
188 ;; Regexps done by simon@gnu with help from Ulrik Dickow <dickow@nbi.dk> and
189 ;; probably others Si's forgotten about (sorry).
191 (defconst fortran-font-lock-keywords-1
192 (let ((comment-chars "c!*"))
195 ;; Fontify comments and strings. We assume that strings cannot be quoted.
196 (cons (concat "^[" comment-chars "].*") 'font-lock-comment-face)
197 '(fortran-match-!-comment . font-lock-comment-face)
198 (list (concat "^[^" comment-chars "\t]" (make-string 71 ?.) "\\(.*\\)")
199 '(1 font-lock-comment-face))
200 '("'[^'\n]*'?" . font-lock-string-face)
202 ;; Program, subroutine and function declarations, plus calls.
203 (list (concat "\\<\\(block[ \t]*data\\|call\\|entry\\|function\\|"
204 "program\\|subroutine\\)\\>[ \t]*\\(\\sw+\\)?")
205 '(1 font-lock-keyword-face)
206 '(2 font-lock-function-name-face nil t))))
207 "Subdued level highlighting for Fortran mode.")
209 (defconst fortran-font-lock-keywords-2
210 (append fortran-font-lock-keywords-1
213 ; (let ((simple-types '("character" "byte" "integer" "logical"
214 ; "none" "real" "complex"
215 ; "double[ \t]*precision" "double[ \t]*complex"))
216 ; (structured-types '("structure" "union" "map"))
217 ; (other-types '("record" "dimension" "parameter" "common" "save"
218 ; "external" "intrinsic" "data" "equivalence")))
220 ; (mapcar (lambda (x) (concat "implicit[ \t]*" x)) simple-types)
222 ; (mapcar (lambda (x) (concat "end[ \t]*" x)) structured-types)
225 (concat "byte\\|c\\(haracter\\|om\\(mon\\|plex\\)\\)\\|"
226 "d\\(ata\\|imension\\|ouble"
227 "[ \t]*\\(complex\\|precision\\)\\)\\|"
228 "e\\(nd[ \t]*\\(map\\|structure\\|union\\)\\|"
229 "quivalence\\|xternal\\)\\|"
230 "i\\(mplicit[ \t]*\\(byte\\|"
231 "c\\(haracter\\|omplex\\)\\|"
232 "double[ \t]*\\(complex\\|precision\\)\\|"
233 "integer\\|logical\\|none\\|real\\)\\|"
234 "nt\\(eger\\|rinsic\\)\\)\\|"
235 "logical\\|map\\|none\\|parameter\\|re\\(al\\|cord\\)\\|"
236 "s\\(ave\\|tructure\\)\\|union"))
238 ; ("continue" "format" "end" "enddo" "if" "then" "else" "endif"
239 ; "elseif" "while" "inquire" "stop" "return" "include" "open"
240 ; "close" "read" "write" "format" "print")
241 (concat "c\\(lose\\|ontinue\\)\\|"
242 "e\\(lse\\(\\|if\\)\\|nd\\(\\|do\\|if\\)\\)\\|format\\|"
243 "i\\(f\\|n\\(clude\\|quire\\)\\)\\|open\\|print\\|"
244 "re\\(ad\\|turn\\)\\|stop\\|then\\|w\\(hile\\|rite\\)"))
246 ; ("and" "or" "not" "lt" "le" "eq" "ge" "gt" "ne" "true" "false")
247 "and\\|eq\\|false\\|g[et]\\|l[et]\\|n\\(e\\|ot\\)\\|or\\|true"))
250 ;; Fontify types and variable names (but not length specs or `/'s).
251 (list (concat "\\<\\(" type-types "\\)\\>[0-9 \t/*]*\\(\\sw+\\)?")
252 '(1 font-lock-type-face)
253 '(15 font-lock-variable-name-face nil t))
255 ;; Fontify all builtin keywords (except logical, do and goto; see below).
256 (concat "\\<\\(" fkeywords "\\)\\>")
258 ;; Fontify all builtin operators.
259 (concat "\\.\\(" flogicals "\\)\\.")
261 ;; Fontify do/goto keywords and targets, and goto tags.
262 (list "\\<\\(do\\|go *to\\)\\>[ \t]*\\([0-9]+\\)?"
263 '(1 font-lock-keyword-face)
264 '(2 font-lock-reference-face nil t))
265 (cons "^ *\\([0-9]+\\)" 'font-lock-reference-face))))
266 "Medium level highlighting for Fortran mode.")
268 (defconst fortran-font-lock-keywords-3
269 (append fortran-font-lock-keywords-2
272 ;; Fontify goto-like `err=label'/`end=label' in read/write statements.
273 (list ", *\\(e\\(nd\\|rr\\)\\)\\> *\\(= *\\([0-9]+\\)\\)?"
274 '(1 font-lock-keyword-face)
275 '(4 font-lock-reference-face nil t))
277 ;; Highlight a standard continuation character and in a TAB-formatted line.
278 '("^ \\([^ 0]\\)" 1 font-lock-string-face)
279 '("^\t\\([1-9]\\)" 1 font-lock-string-face)))
280 "Gaudy level highlighting for Fortran mode.")
282 (defvar fortran-font-lock-keywords fortran-font-lock-keywords-1
283 "Default expressions to highlight in Fortran mode.")
285 (defvar fortran-mode-map ()
286 "Keymap used in Fortran mode.")
289 (setq fortran-mode-map (make-sparse-keymap))
290 (define-key fortran-mode-map ";" 'fortran-abbrev-start)
291 (define-key fortran-mode-map "\C-c;" 'fortran-comment-region)
292 (define-key fortran-mode-map "\e\C-a" 'beginning-of-fortran-subprogram)
293 (define-key fortran-mode-map "\e\C-e" 'end-of-fortran-subprogram)
294 (define-key fortran-mode-map "\e;" 'fortran-indent-comment)
295 (define-key fortran-mode-map "\e\C-h" 'mark-fortran-subprogram)
296 (define-key fortran-mode-map "\e\n" 'fortran-split-line)
297 (define-key fortran-mode-map "\n" 'fortran-indent-new-line)
298 (define-key fortran-mode-map "\e\C-q" 'fortran-indent-subprogram)
299 (define-key fortran-mode-map "\C-c\C-w" 'fortran-window-create-momentarily)
300 (define-key fortran-mode-map "\C-c\C-r" 'fortran-column-ruler)
301 (define-key fortran-mode-map "\C-c\C-p" 'fortran-previous-statement)
302 (define-key fortran-mode-map "\C-c\C-n" 'fortran-next-statement)
303 (define-key fortran-mode-map "\t" 'fortran-indent-line)
304 (define-key fortran-mode-map "0" 'fortran-electric-line-number)
305 (define-key fortran-mode-map "1" 'fortran-electric-line-number)
306 (define-key fortran-mode-map "2" 'fortran-electric-line-number)
307 (define-key fortran-mode-map "3" 'fortran-electric-line-number)
308 (define-key fortran-mode-map "4" 'fortran-electric-line-number)
309 (define-key fortran-mode-map "5" 'fortran-electric-line-number)
310 (define-key fortran-mode-map "6" 'fortran-electric-line-number)
311 (define-key fortran-mode-map "7" 'fortran-electric-line-number)
312 (define-key fortran-mode-map "8" 'fortran-electric-line-number)
313 (define-key fortran-mode-map "9" 'fortran-electric-line-number))
315 (defvar fortran-mode-abbrev-table nil)
316 (if fortran-mode-abbrev-table
318 (let ((ac abbrevs-changed))
319 (define-abbrev-table 'fortran-mode-abbrev-table ())
320 (define-abbrev fortran-mode-abbrev-table ";au" "automatic" nil)
321 (define-abbrev fortran-mode-abbrev-table ";b" "byte" nil)
322 (define-abbrev fortran-mode-abbrev-table ";bd" "block data" nil)
323 (define-abbrev fortran-mode-abbrev-table ";ch" "character" nil)
324 (define-abbrev fortran-mode-abbrev-table ";cl" "close" nil)
325 (define-abbrev fortran-mode-abbrev-table ";c" "continue" nil)
326 (define-abbrev fortran-mode-abbrev-table ";cm" "common" nil)
327 (define-abbrev fortran-mode-abbrev-table ";cx" "complex" nil)
328 (define-abbrev fortran-mode-abbrev-table ";df" "define" nil)
329 (define-abbrev fortran-mode-abbrev-table ";di" "dimension" nil)
330 (define-abbrev fortran-mode-abbrev-table ";do" "double" nil)
331 (define-abbrev fortran-mode-abbrev-table ";dc" "double complex" nil)
332 (define-abbrev fortran-mode-abbrev-table ";dp" "double precision" nil)
333 (define-abbrev fortran-mode-abbrev-table ";dw" "do while" nil)
334 (define-abbrev fortran-mode-abbrev-table ";e" "else" nil)
335 (define-abbrev fortran-mode-abbrev-table ";ed" "enddo" nil)
336 (define-abbrev fortran-mode-abbrev-table ";el" "elseif" nil)
337 (define-abbrev fortran-mode-abbrev-table ";en" "endif" nil)
338 (define-abbrev fortran-mode-abbrev-table ";eq" "equivalence" nil)
339 (define-abbrev fortran-mode-abbrev-table ";ew" "endwhere" nil)
340 (define-abbrev fortran-mode-abbrev-table ";ex" "external" nil)
341 (define-abbrev fortran-mode-abbrev-table ";ey" "entry" nil)
342 (define-abbrev fortran-mode-abbrev-table ";f" "format" nil)
343 (define-abbrev fortran-mode-abbrev-table ";fa" ".false." nil)
344 (define-abbrev fortran-mode-abbrev-table ";fu" "function" nil)
345 (define-abbrev fortran-mode-abbrev-table ";g" "goto" nil)
346 (define-abbrev fortran-mode-abbrev-table ";im" "implicit" nil)
347 (define-abbrev fortran-mode-abbrev-table ";ib" "implicit byte" nil)
348 (define-abbrev fortran-mode-abbrev-table ";ic" "implicit complex" nil)
349 (define-abbrev fortran-mode-abbrev-table ";ich" "implicit character" nil)
350 (define-abbrev fortran-mode-abbrev-table ";ii" "implicit integer" nil)
351 (define-abbrev fortran-mode-abbrev-table ";il" "implicit logical" nil)
352 (define-abbrev fortran-mode-abbrev-table ";ir" "implicit real" nil)
353 (define-abbrev fortran-mode-abbrev-table ";inc" "include" nil)
354 (define-abbrev fortran-mode-abbrev-table ";in" "integer" nil)
355 (define-abbrev fortran-mode-abbrev-table ";intr" "intrinsic" nil)
356 (define-abbrev fortran-mode-abbrev-table ";l" "logical" nil)
357 (define-abbrev fortran-mode-abbrev-table ";n" "namelist" nil)
358 (define-abbrev fortran-mode-abbrev-table ";o" "open" nil) ; was ;op
359 (define-abbrev fortran-mode-abbrev-table ";pa" "parameter" nil)
360 (define-abbrev fortran-mode-abbrev-table ";pr" "program" nil)
361 (define-abbrev fortran-mode-abbrev-table ";ps" "pause" nil)
362 (define-abbrev fortran-mode-abbrev-table ";p" "print" nil)
363 (define-abbrev fortran-mode-abbrev-table ";rc" "record" nil)
364 (define-abbrev fortran-mode-abbrev-table ";re" "real" nil)
365 (define-abbrev fortran-mode-abbrev-table ";r" "read" nil)
366 (define-abbrev fortran-mode-abbrev-table ";rt" "return" nil)
367 (define-abbrev fortran-mode-abbrev-table ";rw" "rewind" nil)
368 (define-abbrev fortran-mode-abbrev-table ";s" "stop" nil)
369 (define-abbrev fortran-mode-abbrev-table ";sa" "save" nil)
370 (define-abbrev fortran-mode-abbrev-table ";st" "structure" nil)
371 (define-abbrev fortran-mode-abbrev-table ";sc" "static" nil)
372 (define-abbrev fortran-mode-abbrev-table ";su" "subroutine" nil)
373 (define-abbrev fortran-mode-abbrev-table ";tr" ".true." nil)
374 (define-abbrev fortran-mode-abbrev-table ";ty" "type" nil)
375 (define-abbrev fortran-mode-abbrev-table ";vo" "volatile" nil)
376 (define-abbrev fortran-mode-abbrev-table ";w" "write" nil)
377 (define-abbrev fortran-mode-abbrev-table ";wh" "where" nil)
378 (setq abbrevs-changed ac)))
381 (defun fortran-mode ()
382 "Major mode for editing Fortran code.
383 \\[fortran-indent-line] indents the current Fortran line correctly.
384 DO statements must not share a common CONTINUE.
386 Type ;? or ;\\[help-command] to display a list of built-in\
387 abbrevs for Fortran keywords.
392 Variables controlling indentation style and extra features:
395 Normally nil in Fortran mode. If you want to use comments
396 starting with `!', set this to the string \"!\".
398 Extra indentation within do blocks. (default 3)
400 Extra indentation within if blocks. (default 3)
401 fortran-structure-indent
402 Extra indentation within structure, union, map and interface blocks.
404 fortran-continuation-indent
405 Extra indentation applied to continuation statements. (default 5)
406 fortran-comment-line-extra-indent
407 Amount of extra indentation for text within full-line comments. (default 0)
408 fortran-comment-indent-style
409 nil means don't change indentation of text in full-line comments,
410 fixed means indent that text at `fortran-comment-line-extra-indent' beyond
411 the value of `fortran-minimum-statement-indent-fixed' (for fixed
412 format continuation style) or `fortran-minimum-statement-indent-tab'
413 (for TAB format continuation style).
414 relative means indent at `fortran-comment-line-extra-indent' beyond the
415 indentation for a line of code.
417 fortran-comment-indent-char
418 Single-character string to be inserted instead of space for
419 full-line comment indentation. (default \" \")
420 fortran-minimum-statement-indent-fixed
421 Minimum indentation for Fortran statements in fixed format mode. (def.6)
422 fortran-minimum-statement-indent-tab
423 Minimum indentation for Fortran statements in TAB format mode. (default 9)
424 fortran-line-number-indent
425 Maximum indentation for line numbers. A line number will get
426 less than this much indentation if necessary to avoid reaching
427 column 5. (default 1)
428 fortran-check-all-num-for-matching-do
429 Non-nil causes all numbered lines to be treated as possible \"continue\"
430 statements. (default nil)
431 fortran-blink-matching-if
432 Non-nil causes \\[fortran-indent-line] on an ENDIF statement to blink on
433 matching IF. Also, from an ENDDO statement, blink on matching DO [WHILE]
434 statement. (default nil)
435 fortran-continuation-string
436 Single-character string to be inserted in column 5 of a continuation
437 line. (default \"$\")
438 fortran-comment-region
439 String inserted by \\[fortran-comment-region] at start of each line in
440 region. (default \"c$$$\")
441 fortran-electric-line-number
442 Non-nil causes line number digits to be moved to the correct column
443 as typed. (default t)
444 fortran-break-before-delimiters
445 Non-nil causes `fortran-do-auto-fill' breaks lines before delimiters.
447 fortran-startup-message
448 Set to nil to inhibit message first time Fortran mode is used.
450 Turning on Fortran mode calls the value of the variable `fortran-mode-hook'
451 with no args, if that value is non-nil."
453 (kill-all-local-variables)
454 (if fortran-startup-message
455 (message "Emacs Fortran mode %s. Bugs to %s"
456 fortran-mode-version bug-fortran-mode))
457 (setq fortran-startup-message nil)
458 (setq local-abbrev-table fortran-mode-abbrev-table)
459 (set-syntax-table fortran-mode-syntax-table)
460 ;; Font Lock mode support.
461 (set (make-local-variable 'font-lock-defaults)
462 '((fortran-font-lock-keywords fortran-font-lock-keywords-1
463 fortran-font-lock-keywords-2 fortran-font-lock-keywords-3) t t))
464 (make-local-variable 'fortran-break-before-delimiters)
465 (setq fortran-break-before-delimiters t)
466 (make-local-variable 'indent-line-function)
467 (setq indent-line-function 'fortran-indent-line)
468 (make-local-variable 'comment-indent-function)
469 (setq comment-indent-function 'fortran-comment-hook)
470 (make-local-variable 'comment-line-start-skip)
471 (setq comment-line-start-skip
472 "^[Cc*]\\(\\([^ \t\n]\\)\\2\\2*\\)?[ \t]*\\|^#.*")
473 (make-local-variable 'comment-line-start)
474 (setq comment-line-start "c")
475 (make-local-variable 'comment-start-skip)
476 (setq comment-start-skip "![ \t]*")
477 (make-local-variable 'comment-start)
478 (setq comment-start nil)
479 (make-local-variable 'require-final-newline)
480 (setq require-final-newline t)
481 (make-local-variable 'abbrev-all-caps)
482 (setq abbrev-all-caps t)
483 (make-local-variable 'indent-tabs-mode)
484 (setq indent-tabs-mode nil)
485 ;;;(setq abbrev-mode t) ; ?? (abbrev-mode 1) instead??
486 (setq fill-column 72) ; Already local?
487 (use-local-map fortran-mode-map)
488 (setq mode-name "Fortran")
489 (setq major-mode 'fortran-mode)
490 ;;;(make-local-variable 'fortran-tab-mode)
491 (make-local-variable 'fortran-comment-line-extra-indent)
492 (make-local-variable 'fortran-minimum-statement-indent-fixed)
493 (make-local-variable 'fortran-minimum-statement-indent-tab)
494 (make-local-variable 'fortran-column-ruler-fixed)
495 (make-local-variable 'fortran-column-ruler-tab)
496 (make-local-variable 'fortran-tab-mode-string)
497 (setq fortran-tab-mode-string " TAB-format")
498 (setq indent-tabs-mode (fortran-analyze-file-format))
499 (run-hooks 'fortran-mode-hook))
501 (defun fortran-comment-hook ()
503 (skip-chars-backward " \t")
504 (max (+ 1 (current-column))
507 (defun fortran-indent-comment ()
508 "Align or create comment on current line.
509 Existing comments of all types are recognized and aligned.
510 If the line has no comment, a side-by-side comment is inserted and aligned
511 if the value of comment-start is not nil.
512 Otherwise, a separate-line comment is inserted, on this line
513 or on a new line inserted before this line if this line is not blank."
516 ;; Recognize existing comments of either kind.
517 (cond ((looking-at comment-line-start-skip)
518 (fortran-indent-line))
519 ((fortran-find-comment-start-skip) ; catches any inline comment and
520 ; leaves point after comment-start-skip
521 (if comment-start-skip
522 (progn (goto-char (match-beginning 0))
523 (if (not (= (current-column) (fortran-comment-hook)))
524 (progn (delete-horizontal-space)
525 (indent-to (fortran-comment-hook)))))
526 (end-of-line))) ; otherwise goto end of line or sth else?
527 ;; No existing comment.
528 ;; If side-by-side comments are defined, insert one,
529 ;; unless line is now blank.
530 ((and comment-start (not (looking-at "^[ \t]*$")))
532 (delete-horizontal-space)
533 (indent-to (fortran-comment-hook))
534 (insert comment-start))
535 ;; Else insert separate-line comment, making a new line if nec.
537 (if (looking-at "^[ \t]*$")
538 (delete-horizontal-space)
542 (insert comment-line-start)
543 (insert-char (if (stringp fortran-comment-indent-char)
544 (aref fortran-comment-indent-char 0)
545 fortran-comment-indent-char)
546 (- (calculate-fortran-indent) (current-column))))))
548 (defun fortran-comment-region (beg-region end-region arg)
549 "Comments every line in the region.
550 Puts fortran-comment-region at the beginning of every line in the region.
551 BEG-REGION and END-REGION are args which specify the region boundaries.
552 With non-nil ARG, uncomments the region."
553 (interactive "*r\nP")
554 (let ((end-region-mark (make-marker)) (save-point (point-marker)))
555 (set-marker end-region-mark end-region)
556 (goto-char beg-region)
558 (if (not arg) ;comment the region
559 (progn (insert fortran-comment-region)
560 (while (and (= (forward-line 1) 0)
561 (< (point) end-region-mark))
562 (insert fortran-comment-region)))
563 (let ((com (regexp-quote fortran-comment-region))) ;uncomment the region
565 (delete-region (point) (match-end 0)))
566 (while (and (= (forward-line 1) 0)
567 (< (point) end-region-mark))
569 (delete-region (point) (match-end 0))))))
570 (goto-char save-point)
571 (set-marker end-region-mark nil)
572 (set-marker save-point nil)))
574 (defun fortran-abbrev-start ()
575 "Typing ;\\[help-command] or ;? lists all the Fortran abbrevs.
576 Any other key combination is executed normally."
579 (insert last-command-char)
580 (if (or (eq (setq c (read-event)) ??) ;insert char if not equal to `?'
582 (fortran-abbrev-help)
583 (setq unread-command-events (list c)))))
585 (defun fortran-abbrev-help ()
586 "List the currently defined abbrevs in Fortran mode."
588 (message "Listing abbrev table...")
589 (display-buffer (fortran-prepare-abbrev-list-buffer))
590 (message "Listing abbrev table...done"))
592 (defun fortran-prepare-abbrev-list-buffer ()
594 (set-buffer (get-buffer-create "*Abbrevs*"))
596 (insert-abbrev-table-description 'fortran-mode-abbrev-table t)
597 (goto-char (point-min))
598 (set-buffer-modified-p nil)
600 (get-buffer-create "*Abbrevs*"))
602 (defun fortran-column-ruler ()
603 "Inserts a column ruler momentarily above current line, till next keystroke.
604 The ruler is defined by the value of `fortran-column-ruler-fixed' when in fixed
605 format mode, and `fortran-column-ruler-tab' when in TAB format mode.
606 The key typed is executed unless it is SPC."
608 (momentary-string-display
610 fortran-column-ruler-tab
611 fortran-column-ruler-fixed)
614 (if (eq (window-start (selected-window))
615 (window-point (selected-window)))
616 (progn (forward-line) (point))
618 nil "Type SPC or any command to erase ruler."))
620 (defun fortran-window-create ()
621 "Makes the window 72 columns wide.
622 See also `fortran-window-create-momentarily'."
624 (condition-case error
626 (let ((window-min-width 2))
627 (if (< (window-width) (frame-width))
628 (enlarge-window-horizontally (- (frame-width)
630 (split-window-horizontally 73)
632 (switch-to-buffer " fortran-window-extra" t)
633 (select-window (previous-window))))
634 (error (message "No room for Fortran window.")
637 (defun fortran-window-create-momentarily (&optional arg)
638 "Momentarily makes the window 72 columns wide.
639 Optional ARG non-nil and non-unity disables the momentary feature.
640 See also `fortran-window-create'."
644 (save-window-excursion
645 (if (not (equal (fortran-window-create) 'error))
646 (progn (message "Type SPC to continue editing.")
647 (let ((char (read-event)))
648 (or (equal char (string-to-char " "))
649 (setq unread-command-events (list char)))))))
650 (fortran-window-create)))
652 (defun fortran-split-line ()
653 "Break line at point and insert continuation marker and alignment."
655 (delete-horizontal-space)
656 (if (save-excursion (beginning-of-line) (looking-at comment-line-start-skip))
657 (insert "\n" comment-line-start " ")
661 (insert-char (fortran-numerical-continuation-char) 1))
662 (insert "\n " fortran-continuation-string)));Space after \n important
663 (fortran-indent-line)) ;when the cont string is C, c or *.
665 (defun fortran-numerical-continuation-char ()
666 "Return a digit for tab-digit style of continuation lines.
667 If, previous line is a tab-digit continuation line, returns that digit
668 plus one. Otherwise return 1. Zero not allowed."
671 (if (looking-at "\t[1-9]")
672 (+ ?1 (% (- (char-after (+ (point) 1)) ?0) 9))
675 (defun delete-horizontal-regexp (chars)
676 "Delete all characters in CHARS around point.
677 CHARS is like the inside of a [...] in a regular expression
678 except that ] is never special and \ quotes ^, - or \."
680 (skip-chars-backward chars)
681 (delete-region (point) (progn (skip-chars-forward chars) (point))))
683 (defun fortran-electric-line-number (arg)
684 "Self insert, but if part of a Fortran line number indent it automatically.
685 Auto-indent does not happen if a numeric arg is used."
687 (if (or arg (not fortran-electric-line-number))
689 (self-insert-command (prefix-numeric-value arg))
690 (self-insert-command 1))
691 (if (or (and (= 5 (current-column))
694 (looking-at " ")));In col 5 with only spaces to left.
695 (and (= (if indent-tabs-mode
696 fortran-minimum-statement-indent-tab
697 fortran-minimum-statement-indent-fixed) (current-column))
700 (looking-at "\t"));In col 8 with a single tab to the left.
701 (not (or (eq last-command 'fortran-indent-line)
703 'fortran-indent-new-line))))
705 (re-search-backward "[^ \t0-9]"
709 t)) ;not a line number
710 (looking-at "[0-9]") ;within a line number
712 (self-insert-command (prefix-numeric-value arg))
713 (skip-chars-backward " \t")
714 (insert last-command-char)
715 (fortran-indent-line))))
717 (defun beginning-of-fortran-subprogram ()
718 "Moves point to the beginning of the current Fortran subprogram."
720 (let ((case-fold-search t))
721 (beginning-of-line -1)
722 (re-search-backward "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]" nil 'move)
723 (if (looking-at "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")
726 (defun end-of-fortran-subprogram ()
727 "Moves point to the end of the current Fortran subprogram."
729 (let ((case-fold-search t))
730 (beginning-of-line 2)
731 (re-search-forward "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]" nil 'move)
732 (goto-char (match-beginning 0))
735 (defun mark-fortran-subprogram ()
736 "Put mark at end of Fortran subprogram, point at beginning.
737 The marks are pushed."
739 (end-of-fortran-subprogram)
741 (beginning-of-fortran-subprogram))
743 (defun fortran-previous-statement ()
744 "Moves point to beginning of the previous Fortran statement.
745 Returns `first-statement' if that statement is the first
746 non-comment Fortran statement in the file, and nil otherwise."
748 (let (not-first-statement continue-test)
752 (not (looking-at comment-line-start-skip))
754 (concat "[ \t]*" (regexp-quote fortran-continuation-string)))
755 (or (looking-at " [^ 0\n]")
756 (looking-at "\t[1-9]")))))
757 (while (and (setq not-first-statement (= (forward-line -1) 0))
758 (or (looking-at comment-line-start-skip)
759 (looking-at "[ \t]*$")
760 (looking-at " [^ 0\n]")
761 (looking-at "\t[1-9]")
762 (looking-at (concat "[ \t]*" comment-start-skip)))))
763 (cond ((and continue-test
764 (not not-first-statement))
765 (message "Incomplete continuation statement."))
767 (fortran-previous-statement))
768 ((not not-first-statement)
771 (defun fortran-next-statement ()
772 "Moves point to beginning of the next Fortran statement.
773 Returns `last-statement' if that statement is the last
774 non-comment Fortran statement in the file, and nil otherwise."
776 (let (not-last-statement)
778 (while (and (setq not-last-statement
779 (and (= (forward-line 1) 0)
781 (or (looking-at comment-line-start-skip)
782 (looking-at "[ \t]*$")
783 (looking-at " [^ 0\n]")
784 (looking-at "\t[1-9]")
785 (looking-at (concat "[ \t]*" comment-start-skip)))))
786 (if (not not-last-statement)
789 (defun fortran-blink-matching-if ()
790 ;; From a Fortran ENDIF statement, blink the matching IF statement.
791 (let ((top-of-window (window-start)) matching-if
792 (endif-point (point)) message)
793 (if (save-excursion (beginning-of-line)
794 (skip-chars-forward " \t0-9")
795 (looking-at "end[ \t]*if\\b"))
797 (if (not (setq matching-if (fortran-beginning-if)))
798 (setq message "No matching if.")
799 (if (< matching-if top-of-window)
801 (goto-char matching-if)
806 (point) (progn (end-of-line) (point))))))))
808 (message "%s" message)
809 (goto-char matching-if)
811 (goto-char endif-point))))))
813 (defun fortran-blink-matching-do ()
814 ;; From a Fortran ENDDO statement, blink on the matching DO or DO WHILE
815 ;; statement. This is basically copied from fortran-blink-matching-if.
816 (let ((top-of-window (window-start)) matching-do
817 (enddo-point (point)) message)
818 (if (save-excursion (beginning-of-line)
819 (skip-chars-forward " \t0-9")
820 (looking-at "end[ \t]*do\\b"))
822 (if (not (setq matching-do (fortran-beginning-do)))
823 (setq message "No matching do.")
824 (if (< matching-do top-of-window)
826 (goto-char matching-do)
831 (point) (progn (end-of-line) (point))))))))
833 (message "%s" message)
834 (goto-char matching-do)
836 (goto-char enddo-point))))))
838 (defun fortran-mark-do ()
839 "Put mark at end of Fortran DO [WHILE]-ENDDO construct, point at beginning.
840 The marks are pushed."
842 (let (enddo-point do-point)
843 (if (setq enddo-point (fortran-end-do))
844 (if (not (setq do-point (fortran-beginning-do)))
845 (message "No matching do.")
846 ;; Set mark, move point.
847 (goto-char enddo-point)
849 (goto-char do-point)))))
851 (defun fortran-end-do ()
852 ;; Search forward for first unmatched ENDDO. Return point or nil.
853 (if (save-excursion (beginning-of-line)
854 (skip-chars-forward " \t0-9")
855 (looking-at "end[ \t]*do\\b"))
861 (while (and (not (= count 0))
862 (not (eq (fortran-next-statement) 'last-statement))
863 ;; Keep local to subprogram
864 (not (looking-at "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")))
866 (skip-chars-forward " \t0-9")
867 (cond ((looking-at "end[ \t]*do\\b")
868 (setq count (- count 1)))
869 ((looking-at "do[ \t]+[^0-9]")
870 (setq count (+ count 1)))))
872 ;; All pairs accounted for.
875 (defun fortran-beginning-do ()
876 ;; Search backwards for first unmatched DO [WHILE]. Return point or nil.
877 (if (save-excursion (beginning-of-line)
878 (skip-chars-forward " \t0-9")
879 (looking-at "do[ \t]+"))
885 (while (and (not (= count 0))
886 (not (eq (fortran-previous-statement) 'first-statement))
887 ;; Keep local to subprogram
888 (not (looking-at "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")))
890 (skip-chars-forward " \t0-9")
891 (cond ((looking-at "do[ \t]+[^0-9]")
892 (setq count (- count 1)))
893 ((looking-at "end[ \t]*do\\b")
894 (setq count (+ count 1)))))
897 ;; All pairs accounted for.
900 (defun fortran-mark-if ()
901 "Put mark at end of Fortran IF-ENDIF construct, point at beginning.
902 The marks are pushed."
904 (let (endif-point if-point)
905 (if (setq endif-point (fortran-end-if))
906 (if (not (setq if-point (fortran-beginning-if)))
907 (message "No matching if.")
908 ;; Set mark, move point.
909 (goto-char endif-point)
911 (goto-char if-point)))))
913 (defun fortran-end-if ()
914 ;; Search forwards for first unmatched ENDIF. Return point or nil.
915 (if (save-excursion (beginning-of-line)
916 (skip-chars-forward " \t0-9")
917 (looking-at "end[ \t]*if\\b"))
920 ;; Search for one. The point has been already been moved to first
921 ;; letter on line but this should not cause troubles.
924 (while (and (not (= count 0))
925 (not (eq (fortran-next-statement) 'last-statement))
926 ;; Keep local to subprogram.
928 "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")))
930 (skip-chars-forward " \t0-9")
931 (cond ((looking-at "end[ \t]*if\\b")
932 (setq count (- count 1)))
934 ((looking-at "if[ \t]*(")
937 (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
938 (let (then-test) ; Multi-line if-then.
940 (and (= (forward-line 1) 0)
941 ;; Search forward for then.
942 (or (looking-at " [^ 0\n]")
943 (looking-at "\t[1-9]"))
947 ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
949 (setq count (+ count 1)))))))
952 ;; All pairs accounted for.
955 (defun fortran-beginning-if ()
956 ;; Search backwards for first unmatched IF-THEN. Return point or nil.
958 ;; May be sitting on multi-line if-then statement, first move to
959 ;; beginning of current statement. Note: `fortran-previous-statement'
960 ;; moves to previous statement *unless* current statement is first
961 ;; one. Only move forward if not first-statement.
962 (if (not (eq (fortran-previous-statement) 'first-statement))
963 (fortran-next-statement))
964 (skip-chars-forward " \t0-9")
966 (looking-at "if[ \t]*(")
968 (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
969 ;; Multi-line if-then.
972 (and (= (forward-line 1) 0)
973 ;; Search forward for then.
974 (or (looking-at " [^ 0\n]")
975 (looking-at "\t[1-9]"))
979 ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
986 (while (and (not (= count 0))
987 (not (eq (fortran-previous-statement) 'first-statement))
988 ;; Keep local to subprogram.
990 "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")))
992 (skip-chars-forward " \t0-9")
993 (cond ((looking-at "if[ \t]*(")
996 (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
997 (let (then-test) ; Multi-line if-then.
999 (and (= (forward-line 1) 0)
1000 ;; Search forward for then.
1001 (or (looking-at " [^ 0\n]")
1002 (looking-at "\t[1-9]"))
1006 ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
1008 (setq count (- count 1)))))
1009 ((looking-at "end[ \t]*if\\b")
1010 (setq count (+ count 1)))))
1013 ;; All pairs accounted for.
1016 (defun fortran-indent-line ()
1017 "Indents current Fortran line based on its contents and on previous lines."
1019 (let ((cfi (calculate-fortran-indent)))
1022 (if (or (not (= cfi (fortran-current-line-indentation)))
1023 (and (re-search-forward "^[ \t]*[0-9]+" (+ (point) 4) t)
1024 (not (fortran-line-number-indented-correctly-p))))
1025 (fortran-indent-to-column cfi)
1027 (if (and (not (looking-at comment-line-start-skip))
1028 (fortran-find-comment-start-skip))
1029 (fortran-indent-comment))))
1030 ;; Never leave point in left margin.
1031 (if (< (current-column) cfi)
1032 (move-to-column cfi))
1033 (if (and auto-fill-function
1034 (> (save-excursion (end-of-line) (current-column)) fill-column))
1037 (fortran-do-auto-fill)))
1038 (if fortran-blink-matching-if
1040 (fortran-blink-matching-if)
1041 (fortran-blink-matching-do)))))
1043 (defun fortran-indent-new-line ()
1044 "Reindent the current Fortran line, insert a newline and indent the newline.
1045 An abbrev before point is expanded if `abbrev-mode' is non-nil."
1047 (if abbrev-mode (expand-abbrev))
1050 (skip-chars-forward " \t")
1051 (if (or (looking-at "[0-9]") ;Reindent only where it is most
1052 (looking-at "end") ;likely to be necessary
1054 (looking-at (regexp-quote fortran-continuation-string)))
1055 (fortran-indent-line)))
1057 (fortran-indent-line))
1059 (defun fortran-indent-subprogram ()
1060 "Properly indents the Fortran subprogram which contains point."
1063 (mark-fortran-subprogram)
1064 (message "Indenting subprogram...")
1065 (indent-region (point) (mark) nil))
1066 (message "Indenting subprogram...done."))
1068 (defun calculate-fortran-indent ()
1069 "Calculates the Fortran indent column based on previous lines."
1070 (let (icol first-statement (case-fold-search t)
1071 (fortran-minimum-statement-indent
1072 (if indent-tabs-mode
1073 fortran-minimum-statement-indent-tab
1074 fortran-minimum-statement-indent-fixed)))
1076 (setq first-statement (fortran-previous-statement))
1078 (setq icol fortran-minimum-statement-indent)
1080 (if (= (point) (point-min))
1081 (setq icol fortran-minimum-statement-indent)
1082 (setq icol (fortran-current-line-indentation)))
1083 (skip-chars-forward " \t0-9")
1084 (cond ((looking-at "if[ \t]*(")
1085 (if (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t_$(=a-z0-9]")
1086 (let (then-test) ;multi-line if-then
1087 (while (and (= (forward-line 1) 0)
1088 ;;search forward for then
1089 (or (looking-at " [^ 0\n]")
1090 (looking-at "\t[1-9]"))
1091 (not (setq then-test (looking-at
1093 *[^ \t_$(=a-z0-9]")))))
1095 (setq icol (+ icol fortran-if-indent))))
1096 ((looking-at "\\(else\\|elseif\\)\\b")
1097 (setq icol (+ icol fortran-if-indent)))
1098 ((looking-at "select[ \t]*case[ \t](.*)\\b")
1099 (setq icol (+ icol fortran-if-indent)))
1100 ((looking-at "case[ \t]*(.*)[ \t]*\n")
1101 (setq icol (+ icol fortran-if-indent)))
1102 ((looking-at "case[ \t]*default\\b")
1103 (setq icol (+ icol fortran-if-indent)))
1104 ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
1105 (setq icol (+ icol fortran-if-indent)))
1106 ((looking-at "where[ \t]*(.*)[ \t]*\n")
1107 (setq icol (+ icol fortran-if-indent)))
1108 ((looking-at "do\\b")
1109 (setq icol (+ icol fortran-do-indent)))
1111 "\\(structure\\|union\\|map\\|interface\\)\\b[ \t]*[^ \t=(a-z]")
1112 (setq icol (+ icol fortran-structure-indent)))
1113 ((looking-at "end\\b[ \t]*[^ \t=(a-z]")
1114 ;; Previous END resets indent to minimum
1115 (setq icol fortran-minimum-statement-indent))))))
1118 (cond ((looking-at "[ \t]*$"))
1119 ((looking-at comment-line-start-skip)
1120 (cond ((eq fortran-comment-indent-style 'relative)
1121 (setq icol (+ icol fortran-comment-line-extra-indent)))
1122 ((eq fortran-comment-indent-style 'fixed)
1123 (setq icol (+ fortran-minimum-statement-indent
1124 fortran-comment-line-extra-indent))))
1125 (setq fortran-minimum-statement-indent 0))
1126 ((or (looking-at (concat "[ \t]*"
1128 fortran-continuation-string)))
1129 (looking-at " [^ 0\n]")
1130 (looking-at "\t[1-9]"))
1131 (setq icol (+ icol fortran-continuation-indent)))
1132 ((looking-at "[ \t]*#") ; Check for cpp directive.
1133 (setq fortran-minimum-statement-indent 0 icol 0))
1135 ((and fortran-check-all-num-for-matching-do
1136 (looking-at "[ \t]*[0-9]+")
1137 (fortran-check-for-matching-do))
1138 (setq icol (- icol fortran-do-indent)))
1140 (skip-chars-forward " \t0-9")
1141 (cond ((looking-at "end[ \t]*if\\b")
1142 (setq icol (- icol fortran-if-indent)))
1143 ((looking-at "\\(else\\|elseif\\)\\b")
1144 (setq icol (- icol fortran-if-indent)))
1145 ((looking-at "case[ \t]*(.*)[ \t]*\n")
1146 (setq icol (- icol fortran-if-indent)))
1147 ((looking-at "case[ \t]*default\\b")
1148 (setq icol (- icol fortran-if-indent)))
1149 ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
1150 (setq icol (- icol fortran-if-indent)))
1151 ((looking-at "end[ \t]*where\\b")
1152 (setq icol (- icol fortran-if-indent)))
1153 ((and (looking-at "continue\\b")
1154 (fortran-check-for-matching-do))
1155 (setq icol (- icol fortran-do-indent)))
1156 ((looking-at "end[ \t]*do\\b")
1157 (setq icol (- icol fortran-do-indent)))
1160 \\(structure\\|union\\|map\\|interface\\)\\b[ \t]*[^ \t=(a-z]")
1161 (setq icol (- icol fortran-structure-indent)))
1163 "end[ \t]*select\\b[ \t]*[^ \t=(a-z]")
1164 (setq icol (- icol fortran-if-indent)))
1165 ((and (looking-at "end\\b[ \t]*[^ \t=(a-z]")
1166 (not (= icol fortran-minimum-statement-indent)))
1167 (message "Warning: `end' not in column %d. Probably\
1168 an unclosed block." fortran-minimum-statement-indent))))))
1169 (max fortran-minimum-statement-indent icol)))
1171 (defun fortran-current-line-indentation ()
1172 "Indentation of current line, ignoring Fortran line number or continuation.
1173 This is the column position of the first non-whitespace character
1174 aside from the line number and/or column 5/8 line-continuation character.
1175 For comment lines, returns indentation of the first
1176 non-indentation text within the comment."
1179 (cond ((looking-at comment-line-start-skip)
1180 (goto-char (match-end 0))
1182 (if (stringp fortran-comment-indent-char)
1183 fortran-comment-indent-char
1184 (char-to-string fortran-comment-indent-char))))
1185 ((or (looking-at " [^ 0\n]")
1186 (looking-at "\t[1-9]"))
1187 (goto-char (match-end 0)))
1189 ;; Move past line number.
1190 (skip-chars-forward "[ \t0-9]");From Uli
1192 ;; Move past whitespace.
1193 (skip-chars-forward " \t")
1196 (defun fortran-indent-to-column (col)
1197 "Indents current line with spaces to column COL.
1198 notes: 1) A non-zero/non-blank character in column 5 indicates a continuation
1199 line, and this continuation character is retained on indentation;
1200 2) If `fortran-continuation-string' is the first non-whitespace
1201 character, this is a continuation line;
1202 3) A non-continuation line which has a number as the first
1203 non-whitespace character is a numbered line.
1204 4) A TAB followed by a digit indicates a continuation line."
1207 (if (looking-at comment-line-start-skip)
1208 (if fortran-comment-indent-style
1209 (let ((char (if (stringp fortran-comment-indent-char)
1210 (aref fortran-comment-indent-char 0)
1211 fortran-comment-indent-char)))
1212 (goto-char (match-end 0))
1213 (delete-horizontal-regexp (concat " \t" (char-to-string char)))
1214 (insert-char char (- col (current-column)))))
1215 (if (looking-at "\t[1-9]")
1216 (if indent-tabs-mode
1217 (goto-char (match-end 0))
1220 (insert fortran-continuation-string))
1221 (if (looking-at " [^ 0\n]")
1222 (if indent-tabs-mode
1223 (progn (delete-char 6)
1225 (insert-char (fortran-numerical-continuation-char) 1))
1227 (delete-horizontal-space)
1228 ;; Put line number in columns 0-4
1229 ;; or put continuation character in column 5.
1231 ((looking-at (regexp-quote fortran-continuation-string))
1232 (if indent-tabs-mode
1235 (if indent-tabs-mode
1236 fortran-minimum-statement-indent-tab
1237 fortran-minimum-statement-indent-fixed))
1239 (insert-char (fortran-numerical-continuation-char) 1))
1242 ((looking-at "[0-9]+")
1243 (let ((extra-space (- 5 (- (match-end 0) (point)))))
1244 (if (< extra-space 0)
1245 (message "Warning: line number exceeds 5-digit limit.")
1246 (indent-to (min fortran-line-number-indent extra-space))))
1247 (skip-chars-forward "0-9")))))
1248 ;; Point is now after any continuation character or line number.
1249 ;; Put body of statement where specified.
1250 (delete-horizontal-space)
1252 ;; Indent any comment following code on the same line.
1253 (if (and comment-start-skip
1254 (fortran-find-comment-start-skip))
1255 (progn (goto-char (match-beginning 0))
1256 (if (not (= (current-column) (fortran-comment-hook)))
1257 (progn (delete-horizontal-space)
1258 (indent-to (fortran-comment-hook)))))))))
1260 (defun fortran-line-number-indented-correctly-p ()
1261 "Return t if current line's line number is correctly indented.
1262 Do not call if there is no line number."
1265 (skip-chars-forward " \t")
1266 (and (<= (current-column) fortran-line-number-indent)
1267 (or (= (current-column) fortran-line-number-indent)
1268 (progn (skip-chars-forward "0-9")
1269 (= (current-column) 5))))))
1271 (defun fortran-check-for-matching-do ()
1272 "When called from a numbered statement, returns t if matching DO is found.
1273 Otherwise return a nil."
1275 (case-fold-search t))
1278 (if (looking-at "[ \t]*[0-9]+")
1280 (skip-chars-forward " \t")
1281 (skip-chars-forward "0") ;skip past leading zeros
1282 (setq charnum (buffer-substring (point)
1283 (progn (skip-chars-forward "0-9")
1286 (and (re-search-backward
1287 (concat "\\(^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]\\)\\|"
1288 "\\(^[ \t0-9]*do[ \t]*0*" charnum "\\b\\)\\|"
1289 "\\(^[ \t]*0*" charnum "\\b\\)")
1291 (looking-at (concat "^[ \t0-9]*do[ \t]*0*" charnum))))))))
1293 (defun fortran-find-comment-start-skip ()
1294 "Move to past `comment-start-skip' found on current line.
1295 Return t if `comment-start-skip' found, nil if not."
1296 ;;; In order to move point only if comment-start-skip is found,
1297 ;;; this one uses a lot of save-excursions. Note that re-search-forward
1298 ;;; moves point even if comment-start-skip is inside a string-constant.
1299 ;;; Some code expects certain values for match-beginning and end
1302 (re-search-forward comment-start-skip
1303 (save-excursion (end-of-line) (point)) t))
1304 (let ((save-match-beginning (match-beginning 0))
1305 (save-match-end (match-end 0)))
1306 (if (fortran-is-in-string-p (match-beginning 0))
1308 (goto-char save-match-end)
1309 (fortran-find-comment-start-skip)) ; recurse for rest of line
1310 (goto-char save-match-beginning)
1311 (re-search-forward comment-start-skip
1312 (save-excursion (end-of-line) (point)) t)
1313 (goto-char (match-end 0))
1317 ;;;From: simon@gnu (Simon Marshall)
1318 ;;; Find the next ! not in a string.
1319 (defun fortran-match-!-comment (limit)
1321 (while (and (setq found (search-forward "!" limit t))
1322 (fortran-is-in-string-p (point))))
1325 ;; Cheaper than `looking-at' "!.*".
1327 (list (1- (point)) (progn (end-of-line) (min (point) limit))))
1330 ;; The above function is about 10% faster than the below...
1331 ;;(defun fortran-match-!-comment (limit)
1333 ;; (while (and (setq found (re-search-forward "!.*" limit t))
1334 ;; (fortran-is-in-string-p (match-beginning 0))))
1337 ;;;From: ralf@up3aud1.gwdg.de (Ralf Fassel)
1338 ;;; Test if TAB format continuation lines work.
1339 (defun fortran-is-in-string-p (where)
1340 "Return non-nil if POS (a buffer position) is inside a Fortran string,
1345 ((bolp) nil) ; bol is never inside a string
1346 ((save-excursion ; comment lines too
1347 (beginning-of-line)(looking-at comment-line-start-skip)) nil)
1348 (t (let (;; ok, serious now. Init some local vars:
1349 (parse-state '(0 nil nil nil nil nil 0))
1350 (quoted-comment-start (if comment-start
1351 (regexp-quote comment-start)))
1356 ;; move to start of current statement
1357 (fortran-next-statement)
1358 (fortran-previous-statement)
1359 ;; now parse up to WHERE
1361 (if (or ;; skip to next line if:
1363 (looking-at comment-line-start-skip)
1364 ;; - at end of line?
1366 ;; - not in a string and after comment-start?
1367 (and (not (nth 3 parse-state))
1369 (equal comment-start
1370 (char-to-string (preceding-char)))))
1371 ;; get around a bug in forward-line in versions <= 18.57
1372 (if (or (> (forward-line 1) 0) (eobp))
1373 (setq not-done nil))
1375 ;; if we are at beginning of code line, skip any
1376 ;; whitespace, labels and tab continuation markers.
1377 (if (bolp) (skip-chars-forward " \t0-9"))
1378 ;; if we are in column <= 5 now, check for continuation char
1379 (cond ((= 5 (current-column)) (forward-char 1))
1380 ((and (< (current-column) 5)
1381 (equal fortran-continuation-string
1382 (char-to-string (following-char)))
1384 ;; find out parse-limit from here
1385 (setq end-of-line (save-excursion (end-of-line)(point)))
1386 (setq parse-limit (min where end-of-line))
1387 ;; parse max up to comment-start, if non-nil and in current line
1390 (if (re-search-forward quoted-comment-start end-of-line t)
1391 (setq parse-limit (min (point) parse-limit)))))
1392 ;; now parse if still in limits
1393 (if (< (point) where)
1394 (setq parse-state (parse-partial-sexp
1395 (point) parse-limit nil nil parse-state))
1396 (setq not-done nil))
1399 (nth 3 parse-state))))))
1401 (defun fortran-auto-fill-mode (arg)
1402 "Toggle fortran-auto-fill mode.
1403 With ARG, turn `fortran-auto-fill' mode on iff ARG is positive.
1404 In `fortran-auto-fill' mode, inserting a space at a column beyond `fill-column'
1405 automatically breaks the line at a previous space."
1407 (prog1 (setq auto-fill-function
1409 (not auto-fill-function)
1410 (> (prefix-numeric-value arg) 0))
1411 'fortran-indent-line
1413 (force-mode-line-update)))
1415 (defun fortran-do-auto-fill ()
1417 (let* ((opoint (point))
1418 (bol (save-excursion (beginning-of-line) (point)))
1419 (eol (save-excursion (end-of-line) (point)))
1420 (bos (min eol (+ bol (fortran-current-line-indentation))))
1424 (if (looking-at comment-line-start-skip)
1425 nil ; OK to break quotes on comment lines.
1426 (move-to-column fill-column)
1427 (cond ((fortran-is-in-string-p (point))
1428 (save-excursion (re-search-backward "[^']'[^']" bol t)
1429 (if fortran-break-before-delimiters
1434 ;; decide where to split the line. If a position for a quoted
1435 ;; string was found above then use that, else break the line
1436 ;; before the last delimiter.
1437 ;; Delimiters are whitespace, commas, and operators.
1438 ;; Will break before a pair of *'s.
1443 (move-to-column (1+ fill-column))
1444 (skip-chars-backward "^ \t\n,'+-/*=)"
1445 ;;; (if fortran-break-before-delimiters
1446 ;;; "^ \t\n,'+-/*=" "^ \t\n,'+-/*=)")
1448 (if (<= (point) (1+ bos))
1450 (move-to-column (1+ fill-column))
1451 ;;;what is this doing???
1452 (if (not (re-search-forward "[\t\n,'+-/*)=]" eol t))
1455 (re-search-forward "[ \t]" opoint t)
1457 (if (looking-at "'")
1459 (skip-chars-backward " \t\*")))
1460 (if fortran-break-before-delimiters
1464 ;; if we are in an in-line comment, don't break unless the
1465 ;; line of code is longer than it should be. Otherwise
1466 ;; break the line at the column computed above.
1468 ;; Need to use fortran-find-comment-start-skip to make sure that quoted !'s
1469 ;; don't prevent a break.
1470 (if (not (or (save-excursion
1471 (if (and (re-search-backward comment-start-skip bol t)
1472 (not (fortran-is-in-string-p (point))))
1474 (skip-chars-backward " \t")
1475 (< (current-column) (1+ fill-column)))))
1477 (goto-char fill-point)
1479 (if (> (save-excursion
1480 (goto-char fill-point) (current-column))
1482 (progn (goto-char fill-point)
1483 (fortran-break-line))
1485 (if (> (save-excursion
1486 (goto-char fill-point)
1488 (+ (calculate-fortran-indent) fortran-continuation-indent))
1490 (goto-char fill-point)
1491 (fortran-break-line))))))
1493 (defun fortran-break-line ()
1494 (let ((opoint (point))
1495 (bol (save-excursion (beginning-of-line) (point)))
1496 (eol (save-excursion (end-of-line) (point)))
1497 (comment-string nil))
1500 (if (and comment-start-skip (fortran-find-comment-start-skip))
1502 (re-search-backward comment-start-skip bol t)
1503 (setq comment-string (buffer-substring (point) eol))
1504 (delete-region (point) eol))))
1505 ;;; Forward line 1 really needs to go to next non white line
1506 (if (save-excursion (forward-line 1)
1507 (or (looking-at " [^ 0\n]")
1508 (looking-at "\t[1-9]")))
1511 (delete-region (point) (match-end 0))
1512 (delete-horizontal-space)
1513 (fortran-do-auto-fill))
1514 (fortran-split-line))
1519 (delete-horizontal-space)
1520 (indent-to (fortran-comment-hook))
1521 (insert comment-string)))))
1523 (defun fortran-analyze-file-format ()
1524 "Returns nil if fixed format is used, t if TAB formatting is used.
1525 Use `fortran-tab-mode-default' if no non-comment statements are found in the
1526 file before the end or the first `fortran-analyze-depth' lines."
1529 (goto-char (point-min))
1535 (> i fortran-analyze-depth)))
1539 ((looking-at "\t") t)
1540 ((looking-at " ") nil)
1541 (fortran-tab-mode-default t)
1544 (or (assq 'fortran-tab-mode-string minor-mode-alist)
1545 (setq minor-mode-alist (cons
1546 '(fortran-tab-mode-string
1547 (indent-tabs-mode fortran-tab-mode-string))
1552 ;;; fortran.el ends here