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- ;;; Fortran mode for GNU Emacs (beta test version 1.21, Oct. 1, 1985)
- ;;; Copyright (c) 1986 Free Software Foundation, Inc.
- ;;; Written by Michael D. Prange (prange@erl.mit.edu)
-
- ;; 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 1, 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.
-
- ;;; Author acknowledges help from Stephen Gildea <gildea@erl.mit.edu>
-
- ;;; Bugs to bug-fortran-mode@erl.mit.edu.
-
- (defvar fortran-do-indent 3
- "*Extra indentation applied to `do' blocks.")
-
- (defvar fortran-if-indent 3
- "*Extra indentation applied to `if' blocks.")
-
- (defvar fortran-continuation-indent 5
- "*Extra indentation applied to `continuation' lines.")
-
- (defvar fortran-comment-indent-style 'fixed
- "*nil forces comment lines not to be touched,
- 'fixed produces fixed comment indentation to comment-column,
- and 'relative indents to current fortran indentation plus comment-column.")
-
- (defvar fortran-comment-line-column 6
- "*Indentation for text in comment lines.")
-
- (defvar comment-line-start nil
- "*Delimiter inserted to start new full-line comment.")
-
- (defvar comment-line-start-skip nil
- "*Regexp to match the start of a full-line comment.")
-
- (defvar fortran-minimum-statement-indent 6
- "*Minimum indentation for fortran statements.")
-
- ;; Note that this is documented in the v18 manuals as being a string
- ;; of length one rather than a single character.
- ;; The code in this file accepts either format for compatibility.
- (defvar fortran-comment-indent-char ?
- "*Character to be inserted for Fortran comment indentation.
- Normally a space.")
-
- (defvar fortran-line-number-indent 1
- "*Maximum indentation for Fortran line numbers.
- 5 means right-justify them within their five-column field.")
-
- (defvar fortran-check-all-num-for-matching-do nil
- "*Non-nil causes all numbered lines to be treated as possible do-loop ends.")
-
- (defvar fortran-continuation-char ?$
- "*Character which is inserted in column 5 by \\[fortran-split-line]
- to begin a continuation line. Normally $.")
-
- (defvar fortran-comment-region "c$$$"
- "*String inserted by \\[fortran-comment-region] at start of each line in region.")
-
- (defvar fortran-electric-line-number t
- "*Non-nil causes line number digits to be moved to the correct column as typed.")
-
- (defvar fortran-startup-message t
- "*Non-nil displays a startup message when fortran-mode is first called.")
-
- (defvar fortran-column-ruler
- (concat "0 4 6 10 20 30 40 50 60 70\n"
- "[ ]|{ | | | | | | | | | | | | |}\n")
- "*String displayed above current line by \\[fortran-column-ruler].")
-
- (defconst fortran-mode-version "1.21")
-
- (defvar fortran-mode-syntax-table nil
- "Syntax table in use in fortran-mode buffers.")
-
- (if fortran-mode-syntax-table
- ()
- (setq fortran-mode-syntax-table (make-syntax-table))
- (modify-syntax-entry ?\; "w" fortran-mode-syntax-table)
- (modify-syntax-entry ?+ "." fortran-mode-syntax-table)
- (modify-syntax-entry ?- "." fortran-mode-syntax-table)
- (modify-syntax-entry ?* "." fortran-mode-syntax-table)
- (modify-syntax-entry ?/ "." fortran-mode-syntax-table)
- (modify-syntax-entry ?\' "\"" fortran-mode-syntax-table)
- (modify-syntax-entry ?\" "\"" fortran-mode-syntax-table)
- (modify-syntax-entry ?\\ "/" fortran-mode-syntax-table)
- (modify-syntax-entry ?. "w" fortran-mode-syntax-table)
- (modify-syntax-entry ?\n ">" fortran-mode-syntax-table))
-
- (defvar fortran-mode-map ()
- "Keymap used in fortran mode.")
-
- (if fortran-mode-map
- ()
- (setq fortran-mode-map (make-sparse-keymap))
- (define-key fortran-mode-map ";" 'fortran-abbrev-start)
- (define-key fortran-mode-map "\C-c;" 'fortran-comment-region)
- (define-key fortran-mode-map "\e\C-a" 'beginning-of-fortran-subprogram)
- (define-key fortran-mode-map "\e\C-e" 'end-of-fortran-subprogram)
- (define-key fortran-mode-map "\e;" 'fortran-indent-comment)
- (define-key fortran-mode-map "\e\C-h" 'mark-fortran-subprogram)
- (define-key fortran-mode-map "\e\n" 'fortran-split-line)
- (define-key fortran-mode-map "\e\C-q" 'fortran-indent-subprogram)
- (define-key fortran-mode-map "\C-c\C-w" 'fortran-window-create)
- (define-key fortran-mode-map "\C-c\C-r" 'fortran-column-ruler)
- (define-key fortran-mode-map "\C-c\C-p" 'fortran-previous-statement)
- (define-key fortran-mode-map "\C-c\C-n" 'fortran-next-statement)
- (define-key fortran-mode-map "\t" 'fortran-indent-line)
- (define-key fortran-mode-map "0" 'fortran-electric-line-number)
- (define-key fortran-mode-map "1" 'fortran-electric-line-number)
- (define-key fortran-mode-map "2" 'fortran-electric-line-number)
- (define-key fortran-mode-map "3" 'fortran-electric-line-number)
- (define-key fortran-mode-map "4" 'fortran-electric-line-number)
- (define-key fortran-mode-map "5" 'fortran-electric-line-number)
- (define-key fortran-mode-map "6" 'fortran-electric-line-number)
- (define-key fortran-mode-map "7" 'fortran-electric-line-number)
- (define-key fortran-mode-map "8" 'fortran-electric-line-number)
- (define-key fortran-mode-map "9" 'fortran-electric-line-number))
-
- (defvar fortran-mode-abbrev-table nil)
- (if fortran-mode-abbrev-table
- ()
- (define-abbrev-table 'fortran-mode-abbrev-table ())
- (let ((abbrevs-changed nil))
- (define-abbrev fortran-mode-abbrev-table ";b" "byte" nil)
- (define-abbrev fortran-mode-abbrev-table ";ch" "character" nil)
- (define-abbrev fortran-mode-abbrev-table ";cl" "close" nil)
- (define-abbrev fortran-mode-abbrev-table ";c" "continue" nil)
- (define-abbrev fortran-mode-abbrev-table ";cm" "common" nil)
- (define-abbrev fortran-mode-abbrev-table ";cx" "complex" nil)
- (define-abbrev fortran-mode-abbrev-table ";di" "dimension" nil)
- (define-abbrev fortran-mode-abbrev-table ";do" "double" nil)
- (define-abbrev fortran-mode-abbrev-table ";dc" "double complex" nil)
- (define-abbrev fortran-mode-abbrev-table ";dp" "double precision" nil)
- (define-abbrev fortran-mode-abbrev-table ";dw" "do while" nil)
- (define-abbrev fortran-mode-abbrev-table ";e" "else" nil)
- (define-abbrev fortran-mode-abbrev-table ";ed" "enddo" nil)
- (define-abbrev fortran-mode-abbrev-table ";el" "elseif" nil)
- (define-abbrev fortran-mode-abbrev-table ";en" "endif" nil)
- (define-abbrev fortran-mode-abbrev-table ";eq" "equivalence" nil)
- (define-abbrev fortran-mode-abbrev-table ";ex" "external" nil)
- (define-abbrev fortran-mode-abbrev-table ";ey" "entry" nil)
- (define-abbrev fortran-mode-abbrev-table ";f" "format" nil)
- (define-abbrev fortran-mode-abbrev-table ";fu" "function" nil)
- (define-abbrev fortran-mode-abbrev-table ";g" "goto" nil)
- (define-abbrev fortran-mode-abbrev-table ";im" "implicit" nil)
- (define-abbrev fortran-mode-abbrev-table ";ib" "implicit byte" nil)
- (define-abbrev fortran-mode-abbrev-table ";ic" "implicit complex" nil)
- (define-abbrev fortran-mode-abbrev-table ";ich" "implicit character" nil)
- (define-abbrev fortran-mode-abbrev-table ";ii" "implicit integer" nil)
- (define-abbrev fortran-mode-abbrev-table ";il" "implicit logical" nil)
- (define-abbrev fortran-mode-abbrev-table ";ir" "implicit real" nil)
- (define-abbrev fortran-mode-abbrev-table ";inc" "include" nil)
- (define-abbrev fortran-mode-abbrev-table ";in" "integer" nil)
- (define-abbrev fortran-mode-abbrev-table ";intr" "intrinsic" nil)
- (define-abbrev fortran-mode-abbrev-table ";l" "logical" nil)
- (define-abbrev fortran-mode-abbrev-table ";op" "open" nil)
- (define-abbrev fortran-mode-abbrev-table ";pa" "parameter" nil)
- (define-abbrev fortran-mode-abbrev-table ";pr" "program" nil)
- (define-abbrev fortran-mode-abbrev-table ";p" "print" nil)
- (define-abbrev fortran-mode-abbrev-table ";re" "real" nil)
- (define-abbrev fortran-mode-abbrev-table ";r" "read" nil)
- (define-abbrev fortran-mode-abbrev-table ";rt" "return" nil)
- (define-abbrev fortran-mode-abbrev-table ";rw" "rewind" nil)
- (define-abbrev fortran-mode-abbrev-table ";s" "stop" nil)
- (define-abbrev fortran-mode-abbrev-table ";su" "subroutine" nil)
- (define-abbrev fortran-mode-abbrev-table ";ty" "type" nil)
- (define-abbrev fortran-mode-abbrev-table ";w" "write" nil)))
-
- (defun fortran-mode ()
- "Major mode for editing fortran code.
- Tab indents the current fortran line correctly.
- `do' statements must not share a common `continue'.
-
- Type `;?' or `;\\[help-command]' to display a list of built-in abbrevs for Fortran keywords.
-
- Variables controlling indentation style and extra features:
-
- comment-start
- Normally nil in Fortran mode. If you want to use comments
- starting with `!', set this to the string \"!\".
- fortran-do-indent
- Extra indentation within do blocks. (default 3)
- fortran-if-indent
- Extra indentation within if blocks. (default 3)
- fortran-continuation-indent
- Extra indentation appled to continuation statements. (default 5)
- fortran-comment-line-column
- Amount of indentation for text within full-line comments. (default 6)
- fortran-comment-indent-style
- nil means don't change indentation of text in full-line comments,
- fixed means indent that text at column fortran-comment-line-column
- relative means indent at fortran-comment-line-column beyond the
- indentation for a line of code.
- Default value is fixed.
- fortran-comment-indent-char
- Character to be inserted instead of space for full-line comment
- indentation. (default is a space)
- fortran-minimum-statement-indent
- Minimum indentation for fortran statements. (default 6)
- fortran-line-number-indent
- Maximum indentation for line numbers. A line number will get
- less than this much indentation if necessary to avoid reaching
- column 5. (default 1)
- fortran-check-all-num-for-matching-do
- Non-nil causes all numbered lines to be treated as possible 'continue'
- statements. (default nil)
- fortran-continuation-char
- character to be inserted in column 5 of a continuation line.
- (default $)
- fortran-comment-region
- String inserted by \\[fortran-comment-region] at start of each line in
- region. (default \"c$$$\")
- fortran-electric-line-number
- Non-nil causes line number digits to be moved to the correct column
- as typed. (default t)
- fortran-startup-message
- Set to nil to inhibit message first time fortran-mode is used.
-
- Turning on Fortran mode calls the value of the variable fortran-mode-hook
- with no args, if that value is non-nil.
- \\{fortran-mode-map}"
- (interactive)
- (kill-all-local-variables)
- (if fortran-startup-message
- (message "Emacs Fortran mode version %s. Bugs to bug-fortran-mode@erl.mit.edu" fortran-mode-version))
- (setq fortran-startup-message nil)
- (setq local-abbrev-table fortran-mode-abbrev-table)
- (set-syntax-table fortran-mode-syntax-table)
- (make-local-variable 'indent-line-function)
- (setq indent-line-function 'fortran-indent-line)
- (make-local-variable 'comment-indent-hook)
- (setq comment-indent-hook 'fortran-comment-hook)
- (make-local-variable 'comment-line-start-skip)
- (setq comment-line-start-skip "^[Cc*][^ \t\n]*[ \t]*") ;[^ \t\n]* handles comment strings such as c$$$
- (make-local-variable 'comment-line-start)
- (setq comment-line-start "c")
- (make-local-variable 'comment-start-skip)
- (setq comment-start-skip "![ \t]*")
- (make-local-variable 'comment-start)
- (setq comment-start nil)
- (make-local-variable 'require-final-newline)
- (setq require-final-newline t)
- (make-local-variable 'abbrev-all-caps)
- (setq abbrev-all-caps t)
- (make-local-variable 'indent-tabs-mode)
- (setq indent-tabs-mode nil)
- (use-local-map fortran-mode-map)
- (setq mode-name "Fortran")
- (setq major-mode 'fortran-mode)
- (run-hooks 'fortran-mode-hook))
-
- (defun fortran-comment-hook ()
- (save-excursion
- (skip-chars-backward " \t")
- (max (+ 1 (current-column))
- comment-column)))
-
- (defun fortran-indent-comment ()
- "Align or create comment on current line.
- Existing comments of all types are recognized and aligned.
- If the line has no comment, a side-by-side comment is inserted and aligned
- if the value of comment-start is not nil.
- Otherwise, a separate-line comment is inserted, on this line
- or on a new line inserted before this line if this line is not blank."
- (interactive)
- (beginning-of-line)
- ;; Recognize existing comments of either kind.
- (cond ((looking-at comment-line-start-skip)
- (fortran-indent-line))
- ((re-search-forward comment-start-skip
- (save-excursion (end-of-line) (point)) t)
- (indent-for-comment))
- ;; No existing comment.
- ;; If side-by-side comments are defined, insert one,
- ;; unless line is now blank.
- ((and comment-start (not (looking-at "^[ \t]*$")))
- (end-of-line)
- (delete-horizontal-space)
- (indent-to (fortran-comment-hook))
- (insert comment-start))
- ;; Else insert separate-line comment, making a new line if nec.
- (t
- (if (looking-at "^[ \t]*$")
- (delete-horizontal-space)
- (beginning-of-line)
- (insert "\n")
- (forward-char -1))
- (insert comment-line-start)
- (insert-char (if (stringp fortran-comment-indent-char)
- (aref fortran-comment-indent-char 0)
- fortran-comment-indent-char)
- (- (calculate-fortran-indent) (current-column))))))
-
- (defun fortran-comment-region (beg-region end-region arg)
- "Comments every line in the region.
- Puts fortran-comment-region at the beginning of every line in the region.
- BEG-REGION and END-REGION are args which specify the region boundaries.
- With non-nil ARG, uncomments the region."
- (interactive "*r\nP")
- (let ((end-region-mark (make-marker)) (save-point (point-marker)))
- (set-marker end-region-mark end-region)
- (goto-char beg-region)
- (beginning-of-line)
- (if (not arg) ;comment the region
- (progn (insert fortran-comment-region)
- (while (and (= (forward-line 1) 0)
- (< (point) end-region-mark))
- (insert fortran-comment-region)))
- (let ((com (regexp-quote fortran-comment-region))) ;uncomment the region
- (if (looking-at com)
- (delete-region (point) (match-end 0)))
- (while (and (= (forward-line 1) 0)
- (< (point) end-region-mark))
- (if (looking-at com)
- (delete-region (point) (match-end 0))))))
- (goto-char save-point)
- (set-marker end-region-mark nil)
- (set-marker save-point nil)))
-
- (defun fortran-abbrev-start ()
- "Typing \";\\[help-command]\" or \";?\" lists all the fortran abbrevs.
- Any other key combination is executed normally." ;\\[help-command] is just a way to print the value of the variable help-char.
- (interactive)
- (let (c)
- (insert last-command-char)
- (if (or (= (setq c (read-char)) ??) ;insert char if not equal to `?'
- (= c help-char))
- (fortran-abbrev-help)
- (setq unread-command-char c))))
-
- (defun fortran-abbrev-help ()
- "List the currently defined abbrevs in Fortran mode."
- (interactive)
- (message "Listing abbrev table...")
- (require 'abbrevlist)
- (list-one-abbrev-table fortran-mode-abbrev-table "*Help*")
- (message "Listing abbrev table...done"))
-
- (defun fortran-column-ruler ()
- "Inserts a column ruler momentarily above current line, till next keystroke.
- The ruler is defined by the value of fortran-column-ruler.
- The key typed is executed unless it is SPC."
- (interactive)
- (momentary-string-display
- fortran-column-ruler (save-excursion (beginning-of-line) (point))
- nil "Type SPC or any command to erase ruler."))
-
- (defun fortran-window-create ()
- "Makes the window 72 columns wide."
- (interactive)
- (let ((window-min-width 2))
- (split-window-horizontally 73))
- (other-window 1)
- (switch-to-buffer " fortran-window-extra" t)
- (select-window (previous-window)))
-
- (defun fortran-split-line ()
- "Break line at point and insert continuation marker and alignment."
- (interactive)
- (delete-horizontal-space)
- (if (save-excursion (beginning-of-line) (looking-at comment-line-start-skip))
- (insert "\n" comment-line-start " ")
- (insert "\n " fortran-continuation-char))
- (fortran-indent-line))
-
- (defun delete-horizontal-regexp (chars)
- "Delete all characters in CHARS around point.
- CHARS is like the inside of a [...] in a regular expression
- except that ] is never special and \ quotes ^, - or \."
- (interactive "*s")
- (skip-chars-backward chars)
- (delete-region (point) (progn (skip-chars-forward chars) (point))))
-
- (defun fortran-electric-line-number (arg)
- "Self insert, but if part of a Fortran line number indent it automatically.
- Auto-indent does not happen if a numeric arg is used."
- (interactive "P")
- (if (or arg (not fortran-electric-line-number))
- (self-insert-command arg)
- (if (or (save-excursion (re-search-backward "[^ \t0-9]"
- (save-excursion
- (beginning-of-line)
- (point))
- t)) ;not a line number
- (looking-at "[0-9]")) ;within a line number
- (insert last-command-char)
- (skip-chars-backward " \t")
- (insert last-command-char)
- (fortran-indent-line))))
-
- (defun beginning-of-fortran-subprogram ()
- "Moves point to the beginning of the current fortran subprogram."
- (interactive)
- (let ((case-fold-search t))
- (beginning-of-line -1)
- (re-search-backward "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]" nil 'move)
- (if (looking-at "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")
- (forward-line 1))))
-
- (defun end-of-fortran-subprogram ()
- "Moves point to the end of the current fortran subprogram."
- (interactive)
- (let ((case-fold-search t))
- (beginning-of-line 2)
- (re-search-forward "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]" nil 'move)
- (goto-char (match-beginning 0))
- (forward-line 1)))
-
- (defun mark-fortran-subprogram ()
- "Put mark at end of fortran subprogram, point at beginning.
- The marks are pushed."
- (interactive)
- (end-of-fortran-subprogram)
- (push-mark (point))
- (beginning-of-fortran-subprogram))
-
- (defun fortran-previous-statement ()
- "Moves point to beginning of the previous fortran statement.
- Returns 'first-statement if that statement is the first
- non-comment Fortran statement in the file, and nil otherwise."
- (interactive)
- (let (not-first-statement continue-test)
- (beginning-of-line)
- (setq continue-test
- (or (looking-at
- (concat "[ \t]*" (regexp-quote (char-to-string
- fortran-continuation-char))))
- (looking-at " [^ 0\n]")))
- (while (and (setq not-first-statement (= (forward-line -1) 0))
- (or (looking-at comment-line-start-skip)
- (looking-at "[ \t]*$")
- (looking-at " [^ 0\n]")
- (looking-at (concat "[ \t]*" comment-start-skip)))))
- (cond ((and continue-test
- (not not-first-statement))
- (message "Incomplete continuation statement."))
- (continue-test
- (fortran-previous-statement))
- ((not not-first-statement)
- 'first-statement))))
-
- (defun fortran-next-statement ()
- "Moves point to beginning of the next fortran statement.
- Returns 'last-statement if that statement is the last
- non-comment Fortran statement in the file, and nil otherwise."
- (interactive)
- (let (not-last-statement)
- (beginning-of-line)
- (while (and (setq not-last-statement (= (forward-line 1) 0))
- (or (looking-at comment-line-start-skip)
- (looking-at "[ \t]*$")
- (looking-at " [^ 0\n]")
- (looking-at (concat "[ \t]*" comment-start-skip)))))
- (if (not not-last-statement)
- 'last-statement)))
-
- (defun fortran-indent-line ()
- "Indents current fortran line based on its contents and on previous lines."
- (interactive)
- (let ((cfi (calculate-fortran-indent)))
- (save-excursion
- (beginning-of-line)
- (if (or (not (= cfi (fortran-current-line-indentation)))
- (and (re-search-forward "^[ \t]*[0-9]+" (+ (point) 4) t)
- (not (fortran-line-number-indented-correctly-p))))
- (fortran-indent-to-column cfi)
- (beginning-of-line)
- (if (re-search-forward comment-start-skip
- (save-excursion (end-of-line) (point)) 'move)
- (fortran-indent-comment))))
- ;; Never leave point in left margin.
- (if (< (current-column) cfi)
- (move-to-column cfi))))
-
- (defun fortran-indent-subprogram ()
- "Properly indents the Fortran subprogram which contains point."
- (interactive)
- (save-excursion
- (mark-fortran-subprogram)
- (message "Indenting subprogram...")
- (indent-region (point) (mark) nil))
- (message "Indenting subprogram...done."))
-
- (defun calculate-fortran-indent ()
- "Calculates the fortran indent column based on previous lines."
- (let (icol first-statement (case-fold-search t))
- (save-excursion
- (setq first-statement (fortran-previous-statement))
- (if first-statement
- (setq icol fortran-minimum-statement-indent)
- (progn
- (if (= (point) (point-min))
- (setq icol fortran-minimum-statement-indent)
- (setq icol (fortran-current-line-indentation)))
- (skip-chars-forward " \t0-9")
- (cond ((looking-at "if[ \t]*(")
- (if (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
- (let (then-test) ;multi-line if-then
- (while (and (= (forward-line 1) 0) ;search forward for then
- (looking-at " [^ 0]")
- (not (setq then-test (looking-at ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
- then-test))
- (setq icol (+ icol fortran-if-indent))))
- ((looking-at "\\(else\\|elseif\\)\\b")
- (setq icol (+ icol fortran-if-indent)))
- ((looking-at "do\\b")
- (setq icol (+ icol fortran-do-indent)))))))
- (save-excursion
- (beginning-of-line)
- (cond ((looking-at "[ \t]*$"))
- ((looking-at comment-line-start-skip)
- (cond ((eq fortran-comment-indent-style 'relative)
- (setq icol (+ icol fortran-comment-line-column)))
- ((eq fortran-comment-indent-style 'fixed)
- (setq icol fortran-comment-line-column))))
- ((or (looking-at (concat "[ \t]*"
- (regexp-quote (char-to-string fortran-continuation-char))))
- (looking-at " [^ 0\n]"))
- (setq icol (+ icol fortran-continuation-indent)))
- (first-statement)
- ((and fortran-check-all-num-for-matching-do
- (looking-at "[ \t]*[0-9]+")
- (fortran-check-for-matching-do))
- (setq icol (- icol fortran-do-indent)))
- (t
- (skip-chars-forward " \t0-9")
- (cond ((looking-at "end[ \t]*if\\b")
- (setq icol (- icol fortran-if-indent)))
- ((looking-at "\\(else\\|elseif\\)\\b")
- (setq icol (- icol fortran-if-indent)))
- ((and (looking-at "continue\\b")
- (fortran-check-for-matching-do))
- (setq icol (- icol fortran-do-indent)))
- ((looking-at "end[ \t]*do\\b")
- (setq icol (- icol fortran-do-indent)))
- ((and (looking-at "end\\b[ \t]*[^ \t=(a-z]")
- (not (= icol fortran-minimum-statement-indent)))
- (message "Warning: `end' not in column %d. Probably an unclosed block." fortran-minimum-statement-indent))))))
- (max fortran-minimum-statement-indent icol)))
-
- (defun fortran-current-line-indentation ()
- "Indentation of current line, ignoring Fortran line number or continuation.
- This is the column position of the first non-whitespace character
- aside from the line number and/or column 5 line-continuation character.
- For comment lines, returns indentation of the first
- non-indentation text within the comment."
- (save-excursion
- (beginning-of-line)
- (cond ((looking-at comment-line-start-skip)
- (goto-char (match-end 0))
- (skip-chars-forward
- (if (stringp fortran-comment-indent-char)
- fortran-comment-indent-char
- (char-to-string fortran-comment-indent-char))))
- ((looking-at " [^ 0\n]")
- (goto-char (match-end 0)))
- (t
- ;; Move past line number.
- (move-to-column 5)))
- ;; Move past whitespace.
- (skip-chars-forward " \t")
- (current-column)))
-
- (defun fortran-indent-to-column (col)
- "Indents current line with spaces to column COL.
- notes: 1) A non-zero/non-blank character in column 5 indicates a continuation
- line, and this continuation character is retained on indentation;
- 2) If fortran-continuation-char is the first non-whitespace character,
- this is a continuation line;
- 3) A non-continuation line which has a number as the first
- non-whitespace character is a numbered line."
- (save-excursion
- (beginning-of-line)
- (if (looking-at comment-line-start-skip)
- (if fortran-comment-indent-style
- (let ((char (if (stringp fortran-comment-indent-char)
- (aref fortran-comment-indent-char 0)
- fortran-comment-indent-char)))
- (goto-char (match-end 0))
- (delete-horizontal-regexp (concat " \t" (char-to-string char)))
- (insert-char char (- col (current-column)))))
- (if (looking-at " [^ 0\n]")
- (forward-char 6)
- (delete-horizontal-space)
- ;; Put line number in columns 0-4
- ;; or put continuation character in column 5.
- (cond ((eobp))
- ((= (following-char) fortran-continuation-char)
- (indent-to 5)
- (forward-char 1))
- ((looking-at "[0-9]+")
- (let ((extra-space (- 5 (- (match-end 0) (point)))))
- (if (< extra-space 0)
- (message "Warning: line number exceeds 5-digit limit.")
- (indent-to (min fortran-line-number-indent extra-space))))
- (skip-chars-forward "0-9"))))
- ;; Point is now after any continuation character or line number.
- ;; Put body of statement where specified.
- (delete-horizontal-space)
- (indent-to col)
- ;; Indent any comment following code on the same line.
- (if (re-search-forward comment-start-skip
- (save-excursion (end-of-line) (point)) t)
- (progn (goto-char (match-beginning 0))
- (if (not (= (current-column) (fortran-comment-hook)))
- (progn (delete-horizontal-space)
- (indent-to (fortran-comment-hook)))))))))
-
- (defun fortran-line-number-indented-correctly-p ()
- "Return t if current line's line number is correctly indente.
- Do not call if there is no line number."
- (save-excursion
- (beginning-of-line)
- (skip-chars-forward " \t")
- (and (<= (current-column) fortran-line-number-indent)
- (or (= (current-column) fortran-line-number-indent)
- (progn (skip-chars-forward "0-9")
- (= (current-column) 5))))))
-
- (defun fortran-check-for-matching-do ()
- "When called from a numbered statement, returns t
- if matching 'do' is found, and nil otherwise."
- (let (charnum
- (case-fold-search t))
- (save-excursion
- (beginning-of-line)
- (if (looking-at "[ \t]*[0-9]+")
- (progn
- (skip-chars-forward " \t")
- (skip-chars-forward "0") ;skip past leading zeros
- (setq charnum (buffer-substring (point)
- (progn (skip-chars-forward "0-9")
- (point))))
- (beginning-of-line)
- (and (re-search-backward
- (concat "\\(^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]\\)\\|\\(^[ \t0-9]*do[ \t]*0*"
- charnum "\\b\\)\\|\\(^[ \t]*0*" charnum "\\b\\)")
- nil t)
- (looking-at (concat "^[ \t0-9]*do[ \t]*0*" charnum))))))))
-
-
-