-;;; fortran.el --- Fortran mode for GNU Emacs
-
-;; Copyright (c) 1986, 93, 94, 95, 97, 98, 1999 Free Software Foundation, Inc.
-
-;; Author: Michael D. Prange <prange@erl.mit.edu>
-;; Maintainer: Dave Love <fx@gnu.org>
-;; Keywords: 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:
-
-;; This mode is documented in the Emacs manual.
-;;
-;; Note that it is for editing Fortran77 or Fortran90 fixed source
-;; form. For editing Fortran 90 free format source, use `f90-mode'
-;; (f90.el).
-
-;;; History:
-
-;; Fortran mode was upgraded by Stephen A. Wood (saw@cebaf.gov).
-
-;; We acknowledge many contributions and valuable suggestions by
-;; Lawrence R. Dodd, Ralf Fassel, Ralph Finch, Stephen Gildea,
-;; Dr. Anil Gokhale, Ulrich Mueller, Mark Neale, Eric Prestemon,
-;; Gary Sabot and Richard Stallman.
-
-;;; Code:
-
-;; Todo:
-
-;; * Tidy it all up! (including renaming non-`fortran' prefixed
-;; functions).
-;; * Implement insertion and removal of statement continuations in
-;; mixed f77/f90 style, with the first `&' past column 72 and the
-;; second in column 6.
-;; * Support any other extensions to f77 grokked by GNU Fortran.
-;; * Change fontification to use font-lock-syntactic-keywords for
-;; fixed-form comments. (Done, but doesn't work properly with
-;; lazy-lock in pre-20.4.)
-
-(require 'easymenu)
-
-(defgroup fortran nil
- "Fortran mode for Emacs"
- :link '(custom-manual "(emacs)Fortran")
- :group 'languages)
-
-(defgroup fortran-indent nil
- "Indentation variables in Fortran mode"
- :prefix "fortran-"
- :group 'fortran)
-
-(defgroup fortran-comment nil
- "Comment-handling variables in Fortran mode"
- :prefix "fortran-"
- :group 'fortran)
-
-
-;;;###autoload
-(defcustom fortran-tab-mode-default nil
- "*Default tabbing/carriage control style for empty files in Fortran mode.
-A value of t specifies tab-digit style of continuation control.
-A value of nil specifies that continuation lines are marked
-with a character in column 6."
- :type 'boolean
- :group 'fortran-indent)
-
-;; Buffer local, used to display mode line.
-(defcustom fortran-tab-mode-string nil
- "String to appear in mode line when TAB format mode is on."
- :type '(choice (const nil) string)
- :group 'fortran-indent)
-(make-variable-buffer-local 'fortran-tab-mode-string)
-
-(defcustom fortran-do-indent 3
- "*Extra indentation applied to DO blocks."
- :type 'integer
- :group 'fortran-indent)
-
-(defcustom fortran-if-indent 3
- "*Extra indentation applied to IF blocks."
- :type 'integer
- :group 'fortran-indent)
-
-(defcustom fortran-structure-indent 3
- "*Extra indentation applied to STRUCTURE, UNION, MAP and INTERFACE blocks."
- :type 'integer
- :group 'fortran-indent)
-
-(defcustom fortran-continuation-indent 5
- "*Extra indentation applied to Fortran continuation lines."
- :type 'integer
- :group 'fortran-indent)
-
-(defcustom fortran-comment-indent-style 'fixed
- "*How to indent comments.
-nil forces comment lines not to be touched,
-'fixed makes fixed comment indentation to `fortran-comment-line-extra-indent'
-columns beyond `fortran-minimum-statement-indent-fixed' (for
-`indent-tabs-mode' of nil) or `fortran-minimum-statement-indent-tab' (for
-`indent-tabs-mode' of t), and 'relative indents to current
-Fortran indentation plus `fortran-comment-line-extra-indent'."
- :type '(radio (const :tag "Untouched" nil) (const fixed) (const relative))
- :group 'fortran-indent)
-
-(defcustom fortran-comment-line-extra-indent 0
- "*Amount of extra indentation for text within full-line comments."
- :type 'integer
- :group 'fortran-indent
- :group 'fortran-comment)
-
-(defcustom comment-line-start nil
- "*Delimiter inserted to start new full-line comment."
- :type '(choice string (const nil))
- :group 'fortran-comment)
-
-(defcustom comment-line-start-skip nil
- "*Regexp to match the start of a full-line comment."
- :type '(choice string (const nil))
- :group 'fortran-comment)
-
-(defcustom fortran-minimum-statement-indent-fixed 6
- "*Minimum statement indentation for fixed format continuation style."
- :type 'integer
- :group 'fortran-indent)
-
-(defcustom fortran-minimum-statement-indent-tab (max tab-width 6)
- "*Minimum statement indentation for TAB format continuation style."
- :type 'integer
- :group 'fortran-indent)
-
-;; 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.
-(defcustom fortran-comment-indent-char " "
- "*Single-character string inserted for Fortran comment indentation.
-Normally a space."
- :type 'string
- :group 'fortran-comment)
-
-(defcustom fortran-line-number-indent 1
- "*Maximum indentation for Fortran line numbers.
-5 means right-justify them within their five-column field."
- :type 'integer
- :group 'fortran-indent)
-
-(defcustom fortran-check-all-num-for-matching-do nil
- "*Non-nil causes all numbered lines to be treated as possible DO loop ends."
- :type 'boolean
- :group 'fortran)
-
-(defcustom fortran-blink-matching-if nil
- "*Non-nil causes \\[fortran-indent-line] on ENDIF statement to blink on matching IF.
-Also, from an ENDDO statement blink on matching DO [WHILE] statement."
- :type 'boolean
- :group 'fortran)
-
-(defcustom fortran-continuation-string "$"
- "*Single-character string used for Fortran continuation lines.
-In fixed format continuation style, this character is inserted in
-column 6 by \\[fortran-split-line] to begin a continuation line.
-Also, if \\[fortran-indent-line] finds this at the beginning of a line, it will
-convert the line into a continuation line of the appropriate style.
-Normally $."
- :type 'string
- :group 'fortran)
-
-(defcustom fortran-comment-region "c$$$"
- "*String inserted by \\[fortran-comment-region] at start of each \
-line in region."
- :type 'string
- :group 'fortran-comment)
-
-(defcustom fortran-electric-line-number t
- "*Non-nil causes line number digits to be moved to the correct \
-column as typed."
- :type 'boolean
- :group 'fortran)
-
-(defvar fortran-column-ruler-fixed
- "0 4 6 10 20 30 40 5\
-0 60 70\n\
-\[ ]|{ | | | | | | | | \
-\| | | | |}\n"
- "String displayed above current line by \\[fortran-column-ruler].
-This variable used in fixed format mode.")
-
-(defvar fortran-column-ruler-tab
- "0 810 20 30 40 5\
-0 60 70\n\
-\[ ]| { | | | | | | | | \
-\| | | | |}\n"
- "String displayed above current line by \\[fortran-column-ruler].
-This variable used in TAB format mode.")
-
-(defvar fortran-mode-syntax-table nil
- "Syntax table in use in Fortran mode buffers.")
-
-(defvar fortran-analyze-depth 100
- "Number of lines to scan to determine whether to use fixed or TAB \
-format style.")
-
-(defcustom fortran-break-before-delimiters t
- "*Non-nil causes filling to break lines before delimiters."
- :type 'boolean
- :group 'fortran)
-
-(if fortran-mode-syntax-table
- ()
- (setq fortran-mode-syntax-table (make-syntax-table))
- ;; We might like `;' to be punctuation (g77 multi-statement lines),
- ;; but that screws abbrevs.
- (modify-syntax-entry ?\; "w" fortran-mode-syntax-table)
- (modify-syntax-entry ?\r " " 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 ?\\ "\\" fortran-mode-syntax-table)
- ;; This might be better as punctuation, as for C, but this way you
- ;; can treat floating-point numbers as symbols.
- (modify-syntax-entry ?. "_" fortran-mode-syntax-table) ; e.g. `a.ne.b'
- (modify-syntax-entry ?_ "_" fortran-mode-syntax-table)
- (modify-syntax-entry ?$ "_" fortran-mode-syntax-table) ; esp. VMSisms
- (modify-syntax-entry ?\! "<" fortran-mode-syntax-table)
- (modify-syntax-entry ?\n ">" fortran-mode-syntax-table))
-
-;; Comments are real pain in Fortran because there is no way to
-;; represent the standard comment syntax in an Emacs syntax table.
-;; (We can do so for F90-style). Therefore an unmatched quote in a
-;; standard comment will throw fontification off on the wrong track.
-;; So we do syntactic fontification with regexps.
-\f
-;; Regexps done by simon@gnu with help from Ulrik Dickow <dickow@nbi.dk> and
-;; probably others Si's forgotten about (sorry).
-
-(defconst fortran-font-lock-keywords-1 nil
- "Subdued level highlighting for Fortran mode.")
-
-(defconst fortran-font-lock-keywords-2 nil
- "Medium level highlighting for Fortran mode.")
-
-(defconst fortran-font-lock-keywords-3 nil
- "Gaudy level highlighting for Fortran mode.")
-
-(defconst fortran-font-lock-syntactic-keywords nil
- "`font-lock-syntactic-keywords' for Fortran.
-These get fixed-format comments fontified.")
-
-(let ((comment-chars "cd") ; `d' for `debugging' comments
- (fortran-type-types
- (eval-when-compile
- (let ((re (regexp-opt
- (let ((simple-types
- '("character" "byte" "integer" "logical"
- "none" "real" "complex"
- "double precision" "double complex"))
- (structured-types '("structure" "union" "map"))
- (other-types '("record" "dimension"
- "parameter" "common" "save"
- "external" "intrinsic" "data"
- "equivalence")))
- (append
- (mapcar (lambda (x) (concat "implicit " x))
- simple-types)
- simple-types
- (mapcar (lambda (x) (concat "end " x))
- structured-types)
- structured-types
- other-types)))))
- ;; In the optimized regexp above, replace spaces by regexp
- ;; for optional whitespace, which regexp-opt would have
- ;; escaped.
- (mapconcat #'identity (split-string re) "[ \t]*"))))
- (fortran-keywords
- (eval-when-compile
- (regexp-opt '("continue" "format" "end" "enddo" "if" "then"
- "else" "endif" "elseif" "while" "inquire" "stop"
- "return" "include" "open" "close" "read" "write"
- "format" "print" "select" "case" "cycle" "exit"))))
- (fortran-logicals
- (eval-when-compile
- (regexp-opt '("and" "or" "not" "lt" "le" "eq" "ge" "gt" "ne"
- "true" "false")))))
-
- (setq fortran-font-lock-syntactic-keywords
- ;; Fixed format comments. (!-style handled normally.)
- (list
- (list (concat "^[" comment-chars "]") 0 '(11))
- (list (concat "^[^" comment-chars "\t\n]" (make-string 71 ?.)
- "\\([^\n]+\\)")
- 1 '(11))))
-
- (setq fortran-font-lock-keywords-1
- (list
- ;;
- ;; Program, subroutine and function declarations, plus calls.
- (list (concat "\\<\\(block[ \t]*data\\|call\\|entry\\|function\\|"
- "program\\|subroutine\\)\\>[ \t]*\\(\\sw+\\)?")
- '(1 font-lock-keyword-face)
- '(2 font-lock-function-name-face nil t))))
-
- (setq fortran-font-lock-keywords-2
- (append fortran-font-lock-keywords-1
- (list
- ;;
- ;; Fontify all type specifiers (must be first; see below).
- (cons (concat "\\<\\(" fortran-type-types "\\)\\>")
- 'font-lock-type-face)
- ;;
- ;; Fontify all builtin keywords (except logical, do
- ;; and goto; see below).
- (concat "\\<\\(" fortran-keywords "\\)\\>")
- ;;
- ;; Fontify all builtin operators.
- (concat "\\.\\(" fortran-logicals "\\)\\.")
- ;;
- ;; Fontify do/goto keywords and targets, and goto tags.
- (list "\\<\\(do\\|go *to\\)\\>[ \t]*\\([0-9]+\\)?"
- '(1 font-lock-keyword-face)
- '(2 font-lock-constant-face nil t))
- (cons "^ *\\([0-9]+\\)" 'font-lock-constant-face))))
-
- (setq fortran-font-lock-keywords-3
- (append
- ;;
- ;; The list `fortran-font-lock-keywords-1'.
- fortran-font-lock-keywords-1
- ;;
- ;; Fontify all type specifiers plus their declared items.
- (list
- (list (concat "\\<\\(" fortran-type-types "\\)\\>[ \t(/]*\\(*\\)?")
- ;; Fontify the type specifier.
- '(1 font-lock-type-face)
- ;; Fontify each declaration item (or just the /.../ block name).
- `(font-lock-match-c-style-declaration-item-and-skip-to-next
- ;; Start after any *(...) expression.
- (condition-case nil
- (and (and (match-beginning ,(+ 2 (regexp-opt-depth
- fortran-type-types)))
- (forward-sexp))
- (forward-sexp))
- (error nil))
- ;; No need to clean up.
- nil
- ;; Fontify as a variable name, functions are
- ;; fontified elsewhere.
- (1 font-lock-variable-name-face nil t))))
- ;;
- ;; Things extra to `fortran-font-lock-keywords-3'
- ;; (must be done first).
- (list
- ;;
- ;; Fontify goto-like `err=label'/`end=label' in read/write
- ;; statements.
- '(", *\\(e\\(nd\\|rr\\)\\)\\> *\\(= *\\([0-9]+\\)\\)?"
- (1 font-lock-keyword-face) (4 font-lock-constant-face nil t))
- ;;
- ;; Highlight standard continuation character and in a
- ;; TAB-formatted line.
- '("^ \\([^ 0]\\)" 1 font-lock-string-face)
- '("^\t\\([1-9]\\)" 1 font-lock-string-face))
- ;;
- ;; The list `fortran-font-lock-keywords-2' less that for types
- ;; (see above).
- (cdr (nthcdr (length fortran-font-lock-keywords-1)
- fortran-font-lock-keywords-2)))))
-
-(defvar fortran-font-lock-keywords fortran-font-lock-keywords-1
- "Default expressions to highlight in Fortran mode.")
-\f
-(defvar fortran-imenu-generic-expression
- ;; These patterns could be confused by sequence nos. in cols 72+ and
- ;; don't allow continuations everywhere.
- (list
- (list
- nil
- ;; Lines below are: 1. leading whitespace; 2. function
- ;; declaration with optional type, e.g. `real', `real*4',
- ;; character(*), `double precision' and possible statement
- ;; continuation; 3. untyped declarations; 4. the variable to
- ;; index. [This will be fooled by `end function' allowed by G77.
- ;; Also, it assumes sensible whitespace is employed.]
- (concat "^\\s-+\\(\
-\\(\\sw\\|\\s-\\|[*()+]\\)*\
-\\<function\\|subroutine\\|entry\\|block\\s-*data\\|program\\)\
-[ \t" fortran-continuation-string "]+\
-\\(\\sw+\\)")
- 3)
- ;; Un-named block data
- (list nil "^\\s-+\\(block\\s-*data\\)\\s-*$" 1))
- "Imenu generic expression for `imenu-default-create-index-function'.")
-
-(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 "\M-\C-a" 'beginning-of-fortran-subprogram)
- (define-key fortran-mode-map "\M-\C-e" 'end-of-fortran-subprogram)
- (define-key fortran-mode-map "\M-;" 'fortran-indent-comment)
- (define-key fortran-mode-map "\M-\C-h" 'mark-fortran-subprogram)
- (define-key fortran-mode-map "\M-\n" 'fortran-split-line)
- (define-key fortran-mode-map "\n" 'fortran-indent-new-line)
- (define-key fortran-mode-map "\M-\C-q" 'fortran-indent-subprogram)
- (define-key fortran-mode-map "\C-c\C-w" 'fortran-window-create-momentarily)
- (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 "\C-c\C-d" 'fortran-join-line) ; like f90
- (define-key fortran-mode-map "\M-^" 'fortran-join-line) ; subvert delete-indentation
- (define-key fortran-mode-map "\C-xnd" 'fortran-narrow-to-subprogram)
- ;(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)
-
- ;; Menu
- (unless (boundp 'fortran-mode-menu)
- (easy-menu-define
- fortran-mode-menu fortran-mode-map ""
- '("Fortran"
- ["Toggle Auto-fill" fortran-auto-fill-mode :style toggle
- :selected (eq auto-fill-function 'fortran-do-auto-fill)]
- ["Toggle abbrev-mode" abbrev-mode :style toggle :selected abbrev-mode]
- "----"
- ["Comment-out Region" fortran-comment-region mark-active]
- ["Uncomment-out region"
- (fortran-comment-region (region-beginning) (region-end) 1)
- mark-active]
- ["Indent Region" indent-region mark-active]
- ["Indent Subprogram" fortran-indent-subprogram t]
- "----"
- ["Beginning of Subprogram" beginning-of-fortran-subprogram t]
- ["End of Subprogram" end-of-fortran-subprogram t]
- ("Mark"
- ["Subprogram" mark-fortran-subprogram t]
- ["IF Block" fortran-mark-if t]
- ["DO Block" fortran-mark-do t])
- ["Narrow to Subprogram" fortran-narrow-to-subprogram t]
- ["Widen" widen t]
- "----"
- ["Temporary column ruler" fortran-column-ruler t]
- ["72-column window" fortran-window-create t]
- ["Full Width Window"
- (enlarge-window-horizontally (- (frame-width) (window-width)))
- (< (window-width) (frame-width))]
- ["Momentary 72-column window" fortran-window-create-momentarily t]
- "----"
- ["Break Line at Point" fortran-split-line t]
- ["Join Line" fortran-join-line t]
- ["Fill Statement/Comment" fill-paragraph t]
- "----"
- ["Add imenu menu"
- (progn (imenu-add-menubar-index)
- ;; Prod menu bar to update -- is this the right way?
- (menu-bar-mode 1))
- (not (and (boundp 'imenu--index-alist)
- imenu--index-alist))]))))
-\f
-(defvar fortran-mode-abbrev-table nil)
-(if fortran-mode-abbrev-table
- ()
- (let ((ac abbrevs-changed))
- (define-abbrev-table 'fortran-mode-abbrev-table ())
- (define-abbrev fortran-mode-abbrev-table ";au" "automatic" nil)
- (define-abbrev fortran-mode-abbrev-table ";b" "byte" nil)
- (define-abbrev fortran-mode-abbrev-table ";bd" "block data" 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 ";df" "define" 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 ";ew" "endwhere" 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 ";fa" ".false." 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 ";n" "namelist" nil)
- (define-abbrev fortran-mode-abbrev-table ";o" "open" nil) ; was ;op
- (define-abbrev fortran-mode-abbrev-table ";pa" "parameter" nil)
- (define-abbrev fortran-mode-abbrev-table ";pr" "program" nil)
- (define-abbrev fortran-mode-abbrev-table ";ps" "pause" nil)
- (define-abbrev fortran-mode-abbrev-table ";p" "print" nil)
- (define-abbrev fortran-mode-abbrev-table ";rc" "record" 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 ";sa" "save" nil)
- (define-abbrev fortran-mode-abbrev-table ";st" "structure" nil)
- (define-abbrev fortran-mode-abbrev-table ";sc" "static" nil)
- (define-abbrev fortran-mode-abbrev-table ";su" "subroutine" nil)
- (define-abbrev fortran-mode-abbrev-table ";tr" ".true." nil)
- (define-abbrev fortran-mode-abbrev-table ";ty" "type" nil)
- (define-abbrev fortran-mode-abbrev-table ";vo" "volatile" nil)
- (define-abbrev fortran-mode-abbrev-table ";w" "write" nil)
- (define-abbrev fortran-mode-abbrev-table ";wh" "where" nil)
- (setq abbrevs-changed ac)))
-\f
-(eval-when-compile ; silence compiler
- (defvar imenu-case-fold-search)
- (defvar imenu-syntax-alist))
-
-;;;###autoload
-(defun fortran-mode ()
- "Major mode for editing Fortran code.
-\\[fortran-indent-line] 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.
-
-Key definitions:
-\\{fortran-mode-map}
-
-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-structure-indent'
- Extra indentation within structure, union, map and interface blocks.
- (default 3)
- `fortran-continuation-indent'
- Extra indentation applied to continuation statements. (default 5)
- `fortran-comment-line-extra-indent'
- Amount of extra indentation for text within full-line comments. (default 0)
- `fortran-comment-indent-style'
- nil means don't change indentation of text in full-line comments,
- fixed means indent that text at `fortran-comment-line-extra-indent' beyond
- the value of `fortran-minimum-statement-indent-fixed' (for fixed
- format continuation style) or `fortran-minimum-statement-indent-tab'
- (for TAB format continuation style).
- relative means indent at `fortran-comment-line-extra-indent' beyond the
- indentation for a line of code.
- (default 'fixed)
- `fortran-comment-indent-char'
- Single-character string to be inserted instead of space for
- full-line comment indentation. (default \" \")
- `fortran-minimum-statement-indent-fixed'
- Minimum indentation for Fortran statements in fixed format mode. (def.6)
- `fortran-minimum-statement-indent-tab'
- Minimum indentation for Fortran statements in TAB format mode. (default 9)
- `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-blink-matching-if'
- Non-nil causes \\[fortran-indent-line] on an ENDIF statement to blink on
- matching IF. Also, from an ENDDO statement, blink on matching DO [WHILE]
- statement. (default nil)
- `fortran-continuation-string'
- Single-character string 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-break-before-delimiters'
- Non-nil causes `fortran-fill' to break lines before delimiters.
- (default t)
-
-Turning on Fortran mode calls the value of the variable `fortran-mode-hook'
-with no args, if that value is non-nil."
- (interactive)
- (kill-all-local-variables)
- (setq local-abbrev-table fortran-mode-abbrev-table)
- (set-syntax-table fortran-mode-syntax-table)
- ;; Font Lock mode support.
- (make-local-variable 'font-lock-defaults)
- (setq font-lock-defaults '((fortran-font-lock-keywords
- fortran-font-lock-keywords-1
- fortran-font-lock-keywords-2
- fortran-font-lock-keywords-3)
- nil t ((?/ . "$/") ("_$" . "w"))
- beginning-of-fortran-subprogram))
- (set (make-local-variable 'font-lock-syntactic-keywords)
- fortran-font-lock-syntactic-keywords)
- (make-local-variable 'fortran-break-before-delimiters)
- (setq fortran-break-before-delimiters t)
- (make-local-variable 'indent-line-function)
- (setq indent-line-function 'fortran-indent-line)
- (make-local-variable 'comment-indent-function)
- (setq comment-indent-function 'fortran-comment-hook)
- (make-local-variable 'comment-line-start-skip)
- (setq comment-line-start-skip
- "^[Cc*]\\(\\([^ \t\n]\\)\\2\\2*\\)?[ \t]*\\|^#.*")
- (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)
-;;;(setq abbrev-mode t) ; ?? (abbrev-mode 1) instead??
- (set (make-local-variable 'fill-column) 72)
- (use-local-map fortran-mode-map)
- (setq mode-name "Fortran")
- (setq major-mode 'fortran-mode)
- (make-local-variable 'fortran-comment-line-extra-indent)
- (make-local-variable 'fortran-minimum-statement-indent-fixed)
- (make-local-variable 'fortran-minimum-statement-indent-tab)
- (make-local-variable 'fortran-column-ruler-fixed)
- (make-local-variable 'fortran-column-ruler-tab)
- (setq fortran-tab-mode-string " TAB-format")
- (setq indent-tabs-mode (fortran-analyze-file-format))
- (setq imenu-case-fold-search t)
- (make-local-variable 'imenu-generic-expression)
- (setq imenu-generic-expression fortran-imenu-generic-expression)
- (setq imenu-syntax-alist '(("_$" . "w")))
- (set (make-local-variable 'fill-paragraph-function) 'fortran-fill-paragraph)
- (set (make-local-variable 'indent-line-function) 'fortran-indent-line)
- (set (make-local-variable 'indent-region-function)
- (lambda (start end)
- (let (fortran-blink-matching-if ; avoid blinking delay
- indent-region-function)
- (indent-region start end nil))))
- (run-hooks 'fortran-mode-hook))
-\f
-(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))
- ((fortran-find-comment-start-skip) ; catches any inline comment and
- ; leaves point after comment-start-skip
- (if comment-start-skip
- (progn (goto-char (match-beginning 0))
- (if (not (= (current-column) (fortran-comment-hook)))
- (progn (delete-horizontal-space)
- (indent-to (fortran-comment-hook)))))
- (end-of-line))) ; otherwise goto end of line or sth else?
- ;; 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)
- (- (fortran-calculate-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)))
-\f
-(defun fortran-abbrev-start ()
- "Typing ;\\[help-command] or ;? lists all the Fortran abbrevs.
-Any other key combination is executed normally."
- (interactive)
- (let (c)
- (insert last-command-char)
- (if (or (eq (setq c (read-event)) ??) ;insert char if not equal to `?'
- (eq c help-char))
- (fortran-abbrev-help)
- (setq unread-command-events (list c)))))
-
-(defun fortran-abbrev-help ()
- "List the currently defined abbrevs in Fortran mode."
- (interactive)
- (message "Listing abbrev table...")
- (display-buffer (fortran-prepare-abbrev-list-buffer))
- (message "Listing abbrev table...done"))
-
-(defun fortran-prepare-abbrev-list-buffer ()
- (save-excursion
- (set-buffer (get-buffer-create "*Abbrevs*"))
- (erase-buffer)
- (insert-abbrev-table-description 'fortran-mode-abbrev-table t)
- (goto-char (point-min))
- (set-buffer-modified-p nil)
- (edit-abbrevs-mode))
- (get-buffer-create "*Abbrevs*"))
-
-(defun fortran-column-ruler ()
- "Insert a column ruler momentarily above current line, till next keystroke.
-The ruler is defined by the value of `fortran-column-ruler-fixed' when in fixed
-format mode, and `fortran-column-ruler-tab' when in TAB format mode.
-The key typed is executed unless it is SPC."
- (interactive)
- (momentary-string-display
- (if indent-tabs-mode
- fortran-column-ruler-tab
- fortran-column-ruler-fixed)
- (save-excursion
- (beginning-of-line)
- (if (eq (window-start (selected-window))
- (window-point (selected-window)))
- (progn (forward-line) (point))
- (point)))
- nil "Type SPC or any command to erase ruler."))
-
-(defun fortran-window-create ()
- "Make the window 72 columns wide.
-See also `fortran-window-create-momentarily'."
- (interactive)
- (condition-case error
- (progn
- (let ((window-min-width 2))
- (if (< (window-width) (frame-width))
- (enlarge-window-horizontally (- (frame-width)
- (window-width) 1)))
- (let* ((window-edges (window-edges))
- (scroll-bar-width (- (nth 2 window-edges)
- (car window-edges)
- (window-width))))
- (split-window-horizontally (+ 72 scroll-bar-width)))
- (other-window 1)
- (switch-to-buffer " fortran-window-extra" t)
- (select-window (previous-window))))
- (error (message "No room for Fortran window.")
- 'error)))
-
-(defun fortran-window-create-momentarily (&optional arg)
- "Momentarily make the window 72 columns wide.
-Optional ARG non-nil and non-unity disables the momentary feature.
-See also `fortran-window-create'."
- (interactive "p")
- (if (or (not arg)
- (= arg 1))
- (save-window-excursion
- (if (not (equal (fortran-window-create) 'error))
- (progn (message "Type SPC to continue editing.")
- (let ((char (read-event)))
- (or (equal char (string-to-char " "))
- (setq unread-command-events (list char)))))))
- (fortran-window-create)))
-
-(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 " ")
- (if indent-tabs-mode
- (insert "\n\t" (fortran-numerical-continuation-char))
- (insert "\n " fortran-continuation-string))) ; Space after \n important
- (fortran-indent-line)) ; when the cont string is C, c or *.
-
-(defun fortran-remove-continuation ()
- (if (looking-at "\\( [^ 0\n]\\|\t[1-9]\\|&\\)")
- (progn (replace-match "")
- (delete-indentation)
- t)))
-
-(defun fortran-join-line (arg)
- "Join current line to the previous one and re-indent.
-With a prefix argument, repeat this operation that many times.
-If the prefix argument ARG is negative, join the next -ARG lines.
-Continuation lines are correctly handled."
- (interactive "*p")
- (save-excursion
- (when (> 0 arg)
- (setq arg (- arg))
- (forward-line arg))
- (while (not (zerop arg))
- (beginning-of-line)
- (or (fortran-remove-continuation)
- (delete-indentation))
- (setq arg (1- arg)))
- (fortran-indent-line)))
-
-(defun fortran-numerical-continuation-char ()
- "Return a digit for tab-digit style of continuation lines.
-If, previous line is a tab-digit continuation line, returns that digit
-plus one. Otherwise return 1. Zero not allowed."
- (save-excursion
- (forward-line -1)
- (if (looking-at "\t[1-9]")
- (+ ?1 (% (- (char-after (+ (point) 1)) ?0) 9))
- ?1)))
-
-(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))))
-
-(put 'fortran-electric-line-number 'delete-selection t)
-(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))
- (if arg
- (self-insert-command (prefix-numeric-value arg))
- (self-insert-command 1))
- (if (or (and (= 5 (current-column))
- (save-excursion
- (beginning-of-line)
- (looking-at " ")));In col 5 with only spaces to left.
- (and (= (if indent-tabs-mode
- fortran-minimum-statement-indent-tab
- fortran-minimum-statement-indent-fixed) (current-column))
- (save-excursion
- (beginning-of-line)
- (looking-at "\t"));In col 8 with a single tab to the left.
- (not (or (eq last-command 'fortran-indent-line)
- (eq last-command
- 'fortran-indent-new-line))))
- (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
- (self-insert-command (prefix-numeric-value arg))
- (skip-chars-backward " \t")
- (insert last-command-char)
- (fortran-indent-line))))
-\f
-(defvar fortran-end-prog-re1
- "end\
-\\([ \t]*\\(program\\|subroutine\\|function\\|block[ \t]*data\\)\\>\
-\\([ \t]*\\(\\sw\\|\\s_\\)+\\)?\\)?")
-(defvar fortran-end-prog-re
- (concat "^[ \t0-9]*" fortran-end-prog-re1)
- "Regexp possibly marking subprogram end.")
-
-(defun fortran-check-end-prog-re ()
- "Check a preliminary match against `fortran-end-prog-re'."
- ;; Having got a possible match for the subprogram end, we need a
- ;; match of whitespace, avoiding possible column 73+ stuff.
- (save-match-data
- (string-match "^\\s-*\\(\\'\\|\\s<\\)"
- (buffer-substring (match-end 0)
- (min (line-end-position)
- (+ 72 (line-beginning-position)))))))
-
-;; Note that you can't just check backwards for `subroutine' &c in
-;; case of un-marked main programs not at the start of the file.
-(defun beginning-of-fortran-subprogram ()
- "Moves point to the beginning of the current Fortran subprogram."
- (interactive)
- (save-match-data
- (let ((case-fold-search t))
- (beginning-of-line -1)
- (if (catch 'ok
- (while (re-search-backward fortran-end-prog-re nil 'move)
- (if (fortran-check-end-prog-re)
- (throw 'ok t))))
- (forward-line)))))
-
-(defun end-of-fortran-subprogram ()
- "Moves point to the end of the current Fortran subprogram."
- (interactive)
- (save-match-data
- (let ((case-fold-search t))
- (if (save-excursion ; on END
- (beginning-of-line)
- (and (looking-at fortran-end-prog-re)
- (fortran-check-end-prog-re)))
- (forward-line)
- (beginning-of-line 2)
- (catch 'ok
- (while (re-search-forward fortran-end-prog-re nil 'move)
- (if (fortran-check-end-prog-re)
- (throw 'ok t))))
- (goto-char (match-beginning 0))
- (forward-line)))))
-
-(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) nil t)
- (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
- (and
- (not (looking-at comment-line-start-skip))
- (or (looking-at
- (concat "[ \t]*" (regexp-quote fortran-continuation-string)))
- (or (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]")))))
- (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 "\t[1-9]")
- (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
- (and (= (forward-line 1) 0)
- (not (eobp))))
- (or (looking-at comment-line-start-skip)
- (looking-at "[ \t]*$")
- (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]")
- (looking-at (concat "[ \t]*" comment-start-skip)))))
- (if (not not-last-statement)
- 'last-statement)))
-
-(defun fortran-narrow-to-subprogram ()
- "Make text outside the current subprogram invisible.
-The subprogram visible is the one that contains or follows point."
- (interactive)
- (save-excursion
- (mark-fortran-subprogram)
- (narrow-to-region (point) (mark))))
-
-(defmacro fortran-with-subprogram-narrowing (&rest forms)
- "Execute FORMS with buffer temporarily narrowed to current subprogram.
-Doesn't push a mark."
- `(save-restriction
- (save-excursion
- (narrow-to-region (progn
- (beginning-of-fortran-subprogram)
- (point))
- (progn
- (end-of-fortran-subprogram)
- (point))))
- ,@forms))
-\f
-(defun fortran-blink-matching-if ()
- "From an ENDIF statement, blink the matching IF statement."
- (let ((top-of-window (window-start))
- (endif-point (point))
- (case-fold-search t)
- matching-if
- message)
- (if (save-excursion (beginning-of-line)
- (skip-chars-forward " \t0-9")
- (looking-at "e\\(nd[ \t]*if\\|lse\\([ \t]*if\\)?\\)\\b"))
- (progn
- (if (not (setq matching-if (fortran-beginning-if)))
- (setq message "No matching if.")
- (if (< matching-if top-of-window)
- (save-excursion
- (goto-char matching-if)
- (beginning-of-line)
- (setq message
- (concat "Matches "
- (buffer-substring
- (point) (progn (end-of-line) (point))))))))
- (if message
- (message "%s" message)
- (goto-char matching-if)
- (sit-for 1)
- (goto-char endif-point))))))
-
-(defun fortran-blink-matching-do ()
- "From an ENDDO statement, blink the matching DO or DO WHILE statement."
- ;; This is basically copied from fortran-blink-matching-if.
- (let ((top-of-window (window-start))
- (enddo-point (point))
- (case-fold-search t)
- matching-do
- message)
- (if (save-excursion (beginning-of-line)
- (skip-chars-forward " \t0-9")
- (looking-at "end[ \t]*do\\b"))
- (progn
- (if (not (setq matching-do (fortran-beginning-do)))
- (setq message "No matching do.")
- (if (< matching-do top-of-window)
- (save-excursion
- (goto-char matching-do)
- (beginning-of-line)
- (setq message
- (concat "Matches "
- (buffer-substring
- (point) (progn (end-of-line) (point))))))))
- (if message
- (message "%s" message)
- (goto-char matching-do)
- (sit-for 1)
- (goto-char enddo-point))))))
-
-(defun fortran-mark-do ()
- "Put mark at end of Fortran DO [WHILE]-ENDDO construct, point at beginning.
-The marks are pushed."
- (interactive)
- (let (enddo-point do-point)
- (if (setq enddo-point (fortran-end-do))
- (if (not (setq do-point (fortran-beginning-do)))
- (message "No matching do.")
- ;; Set mark, move point.
- (goto-char enddo-point)
- (push-mark)
- (goto-char do-point)))))
-
-(defun fortran-end-do ()
- "Search forward for first unmatched ENDDO.
-Return point or nil."
- (let ((case-fold-search t))
- (if (save-excursion (beginning-of-line)
- (skip-chars-forward " \t0-9")
- (looking-at "end[ \t]*do\\b"))
- ;; Sitting on one.
- (match-beginning 0)
- ;; Search for one.
- (save-excursion
- (let ((count 1))
- (while (and (not (= count 0))
- (not (eq (fortran-next-statement) 'last-statement))
- ;; Keep local to subprogram
- (not (and (looking-at fortran-end-prog-re)
- (fortran-check-end-prog-re))))
-
- (skip-chars-forward " \t0-9")
- (cond ((looking-at "end[ \t]*do\\b")
- (setq count (1- count)))
- ((looking-at "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+[^0-9]")
- (setq count (+ count 1)))))
- (and (= count 0)
- ;; All pairs accounted for.
- (point)))))))
-
-(defun fortran-beginning-do ()
- "Search backwards for first unmatched DO [WHILE].
-Return point or nil."
- (let ((case-fold-search t))
- (if (save-excursion (beginning-of-line)
- (skip-chars-forward " \t0-9")
- (looking-at "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+"))
- ;; Sitting on one.
- (match-beginning 0)
- ;; Search for one.
- (save-excursion
- (let ((count 1))
- (while (and (not (= count 0))
- (not (eq (fortran-previous-statement) 'first-statement))
- ;; Keep local to subprogram
- (not (and (looking-at fortran-end-prog-re)
- (fortran-check-end-prog-re))))
-
- (skip-chars-forward " \t0-9")
- (cond ((looking-at "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+[^0-9]")
- (setq count (1- count)))
- ((looking-at "end[ \t]*do\\b")
- (setq count (1+ count)))))
-
- (and (= count 0)
- ;; All pairs accounted for.
- (point)))))))
-
-(defun fortran-mark-if ()
- "Put mark at end of Fortran IF-ENDIF construct, point at beginning.
-The marks are pushed."
- (interactive)
- (let (endif-point if-point)
- (if (setq endif-point (fortran-end-if))
- (if (not (setq if-point (fortran-beginning-if)))
- (message "No matching if.")
- ;; Set mark, move point.
- (goto-char endif-point)
- (push-mark)
- (goto-char if-point)))))
-
-(defvar fortran-if-start-re "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?if[ \t]*(")
-
-(defun fortran-end-if ()
- "Search forwards for first unmatched ENDIF.
-Return point or nil."
- (let ((case-fold-search t))
- (if (save-excursion (beginning-of-line)
- (skip-chars-forward " \t0-9")
- (looking-at "end[ \t]*if\\b"))
- ;; Sitting on one.
- (match-beginning 0)
- ;; Search for one. The point has been already been moved to first
- ;; letter on line but this should not cause troubles.
- (save-excursion
- (let ((count 1))
- (while (and (not (= count 0))
- (not (eq (fortran-next-statement) 'last-statement))
- ;; Keep local to subprogram.
- (not (and (looking-at fortran-end-prog-re)
- (fortran-check-end-prog-re))))
-
- (skip-chars-forward " \t0-9")
- (cond ((looking-at "end[ \t]*if\\b")
- (setq count (- count 1)))
-
- ((looking-at fortran-if-start-re)
- (save-excursion
- (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.
- (or (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]"))
- (not
- (setq then-test
- (looking-at
- ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
- then-test))
- (setq count (+ count 1)))))))
-
- (and (= count 0)
- ;; All pairs accounted for.
- (point)))))))
-
-(defun fortran-beginning-if ()
- "Search backwards for first unmatched IF-THEN.
-Return point or nil."
- (let ((case-fold-search t))
- (if (save-excursion
- ;; May be sitting on multi-line if-then statement, first move to
- ;; beginning of current statement. Note: `fortran-previous-statement'
- ;; moves to previous statement *unless* current statement is first
- ;; one. Only move forward if not first-statement.
- (if (not (eq (fortran-previous-statement) 'first-statement))
- (fortran-next-statement))
- (skip-chars-forward " \t0-9")
- (and
- (looking-at fortran-if-start-re)
- (save-match-data
- (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
- ;; Multi-line if-then.
- (let (then-test)
- (while
- (and (= (forward-line 1) 0)
- ;; Search forward for then.
- (or (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]"))
- (not
- (setq then-test
- (looking-at
- ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
- then-test)))))
- ;; Sitting on one.
- (match-beginning 0)
- ;; Search for one.
- (save-excursion
- (let ((count 1))
- (while (and (not (= count 0))
- (not (eq (fortran-previous-statement) 'first-statement))
- ;; Keep local to subprogram.
- (not (and (looking-at fortran-end-prog-re)
- (fortran-check-end-prog-re))))
-
- (skip-chars-forward " \t0-9")
- (cond ((looking-at fortran-if-start-re)
- (save-excursion
- (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.
- (or (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]"))
- (not
- (setq then-test
- (looking-at
- ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
- then-test))
- (setq count (- count 1)))))
- ((looking-at "end[ \t]*if\\b")
- (setq count (+ count 1)))))
-
- (and (= count 0)
- ;; All pairs accounted for.
- (point)))))))
-\f
-(defun fortran-indent-line ()
- "Indent current Fortran line based on its contents and on previous lines."
- (interactive)
- (let ((cfi (fortran-calculate-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 (and (not (looking-at comment-line-start-skip))
- (fortran-find-comment-start-skip))
- (fortran-indent-comment))))
- ;; Never leave point in left margin.
- (if (< (current-column) cfi)
- (move-to-column cfi))
- (if (and auto-fill-function
- (> (save-excursion (end-of-line) (current-column)) fill-column))
- (save-excursion
- (end-of-line)
- (fortran-fill)))
- (if fortran-blink-matching-if
- (progn
- (fortran-blink-matching-if)
- (fortran-blink-matching-do)))))
-
-(defun fortran-indent-new-line ()
- "Reindent the current Fortran line, insert a newline and indent the newline.
-An abbrev before point is expanded if variable `abbrev-mode' is non-nil."
- (interactive)
- (if abbrev-mode (expand-abbrev))
- (save-excursion
- (beginning-of-line)
- (skip-chars-forward " \t")
- (let ((case-fold-search t))
- (if (or (looking-at "[0-9]") ;Reindent only where it is most
- (looking-at "end") ;likely to be necessary
- (looking-at "else")
- (looking-at (regexp-quote fortran-continuation-string)))
- (fortran-indent-line))))
- (newline)
- (fortran-indent-line))
-
-(defun fortran-indent-subprogram ()
- "Properly indent 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 fortran-calculate-indent ()
- "Calculates the Fortran indent column based on previous lines."
- (let (icol first-statement (case-fold-search t)
- (fortran-minimum-statement-indent
- (if indent-tabs-mode
- fortran-minimum-statement-indent-tab
- fortran-minimum-statement-indent-fixed)))
- (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 "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?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
- (or (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]"))
- (not (setq then-test (looking-at
- ".*then\\b[ \t]\
-*[^ \t_$(=a-z0-9]")))))
- then-test))
- (setq icol (+ icol fortran-if-indent))))
- ((looking-at "else\\(if\\)?\\b")
- (setq icol (+ icol fortran-if-indent)))
- ((looking-at "select[ \t]*case[ \t](.*)")
- (setq icol (+ icol fortran-if-indent)))
- ((looking-at "case[ \t]*(.*)")
- (setq icol (+ icol fortran-if-indent)))
- ((looking-at "case[ \t]*default\\b")
- (setq icol (+ icol fortran-if-indent)))
- ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
- (setq icol (+ icol fortran-if-indent)))
- ((looking-at "where[ \t]*(.*)[ \t]*\n")
- (setq icol (+ icol fortran-if-indent)))
- ((looking-at "do\\b")
- (setq icol (+ icol fortran-do-indent)))
- ((looking-at
- "\\(structure\\|union\\|map\\|interface\\)\\b[ \t]*[^ \t=(a-z]")
- (setq icol (+ icol fortran-structure-indent)))
- ((and (looking-at fortran-end-prog-re1)
- (fortran-check-end-prog-re))
- ;; Previous END resets indent to minimum
- (setq icol fortran-minimum-statement-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-extra-indent)))
- ((eq fortran-comment-indent-style 'fixed)
- (setq icol (+ fortran-minimum-statement-indent
- fortran-comment-line-extra-indent))))
- (setq fortran-minimum-statement-indent 0))
- ((or (looking-at (concat "[ \t]*"
- (regexp-quote
- fortran-continuation-string)))
- (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]"))
- (setq icol (+ icol fortran-continuation-indent)))
- ((looking-at "[ \t]*#") ; Check for cpp directive.
- (setq fortran-minimum-statement-indent 0 icol 0))
- (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\\|select\\|where\\)\\b")
- (setq icol (- icol fortran-if-indent)))
- ((looking-at "else\\(if\\)?\\b")
- (setq icol (- icol fortran-if-indent)))
- ((looking-at "case[ \t]*\\((.*)\\|default\\>\\)")
- (setq icol (- icol fortran-if-indent)))
- ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\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)))
- ((looking-at "end[ \t]*\
-\\(structure\\|union\\|map\\|interface\\)\\b[ \t]*[^ \t=(a-z]")
- (setq icol (- icol fortran-structure-indent)))
- ((and (looking-at fortran-end-prog-re1)
- (fortran-check-end-prog-re)
- (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)))
-\f
-(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 5/8 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))))
- ((or (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]"))
- (goto-char (match-end 0)))
- (t
- ;; Move past line number.
- (skip-chars-forward "[ \t0-9]");From Uli
- ))
- ;; Move past whitespace.
- (skip-chars-forward " \t")
- (current-column)))
-
-(defun fortran-indent-to-column (col)
- "Indent 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-string' 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.
- 4) A TAB followed by a digit indicates a continuation 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 "\t[1-9]")
- (if indent-tabs-mode
- (goto-char (match-end 0))
- (delete-char 2)
- (insert " ")
- (insert fortran-continuation-string))
- (if (looking-at " [^ 0\n]")
- (if indent-tabs-mode
- (progn (delete-char 6)
- (insert "\t")
- (insert-char (fortran-numerical-continuation-char) 1))
- (forward-char 6))
- (delete-horizontal-space)
- ;; Put line number in columns 0-4
- ;; or put continuation character in column 5.
- (cond ((eobp))
- ((looking-at (regexp-quote fortran-continuation-string))
- (if indent-tabs-mode
- (progn
- (indent-to
- (if indent-tabs-mode
- fortran-minimum-statement-indent-tab
- fortran-minimum-statement-indent-fixed))
- (delete-char 1)
- (insert-char (fortran-numerical-continuation-char) 1))
- (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 (and comment-start-skip
- (fortran-find-comment-start-skip))
- (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 indented.
-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, return t if matching DO is found.
-Otherwise return nil."
- (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)
- (fortran-with-subprogram-narrowing
- (and (re-search-backward
- (concat "\\(^[ \t0-9]*do[ \t]*0*" charnum "\\b\\)\\|"
- "\\(^[ \t]*0*" charnum "\\b\\)")
- nil t)
- (looking-at (concat "^[ \t0-9]*do[ \t]*0*" charnum)))))))))
-
-(defun fortran-find-comment-start-skip ()
- "Move to past `comment-start-skip' found on current line.
-Return t if `comment-start-skip' found, nil if not."
- ;; In order to move point only if comment-start-skip is found, this
- ;; one uses a lot of save-excursions. Note that re-search-forward
- ;; moves point even if comment-start-skip is inside a string-constant.
- ;; Some code expects certain values for match-beginning and end
- (interactive)
- (if (save-excursion
- (re-search-forward comment-start-skip
- (save-excursion (end-of-line) (point)) t))
- (let ((save-match-beginning (match-beginning 0))
- (save-match-end (match-end 0)))
- (if (fortran-is-in-string-p (match-beginning 0))
- (save-excursion
- (goto-char save-match-end)
- (fortran-find-comment-start-skip)) ; recurse for rest of line
- (goto-char save-match-beginning)
- (re-search-forward comment-start-skip
- (save-excursion (end-of-line) (point)) t)
- (goto-char (match-end 0))
- t))
- nil))
-
-;;From: ralf@up3aud1.gwdg.de (Ralf Fassel)
-;; Test if TAB format continuation lines work.
-(defun fortran-is-in-string-p (where)
- "Return non-nil iff WHERE (a buffer position) is inside a Fortran string."
- (save-excursion
- (goto-char where)
- (cond
- ((bolp) nil) ; bol is never inside a string
- ((save-excursion ; comment lines too
- (beginning-of-line)
- (looking-at comment-line-start-skip)) nil)
- (t (let (;; ok, serious now. Init some local vars:
- (parse-state '(0 nil nil nil nil nil 0))
- (quoted-comment-start (if comment-start
- (regexp-quote comment-start)))
- (not-done t)
- parse-limit
- end-of-line
- )
- ;; move to start of current statement
- (fortran-next-statement)
- (fortran-previous-statement)
- ;; now parse up to WHERE
- (while not-done
- (if (or ;; skip to next line if:
- ;; - comment line?
- (looking-at comment-line-start-skip)
- ;; - at end of line?
- (eolp)
- ;; - not in a string and after comment-start?
- (and (not (nth 3 parse-state))
- comment-start
- (equal comment-start
- (char-to-string (preceding-char)))))
- (if (> (forward-line) 0)
- (setq not-done nil))
- ;; else:
- ;; if we are at beginning of code line, skip any
- ;; whitespace, labels and tab continuation markers.
- (if (bolp) (skip-chars-forward " \t0-9"))
- ;; if we are in column <= 5 now, check for continuation char
- (cond ((= 5 (current-column)) (forward-char 1))
- ((and (< (current-column) 5)
- (equal fortran-continuation-string
- (char-to-string (following-char)))
- (forward-char 1))))
- ;; find out parse-limit from here
- (setq end-of-line (save-excursion (end-of-line)(point)))
- (setq parse-limit (min where end-of-line))
- ;; parse max up to comment-start, if non-nil and in current line
- (if comment-start
- (save-excursion
- (if (re-search-forward quoted-comment-start end-of-line t)
- (setq parse-limit (min (point) parse-limit)))))
- ;; now parse if still in limits
- (if (< (point) where)
- (setq parse-state (parse-partial-sexp
- (point) parse-limit nil nil parse-state))
- (setq not-done nil))
- ))
- ;; result is
- (nth 3 parse-state))))))
-
-(defun fortran-auto-fill-mode (arg)
- "Toggle fortran-auto-fill mode.
-With ARG, turn `fortran-auto-fill' mode on iff ARG is positive.
-In `fortran-auto-fill' mode, inserting a space at a column beyond `fill-column'
-automatically breaks the line at a previous space."
- (interactive "P")
- (prog1 (setq auto-fill-function
- (if (if (null arg)
- (not auto-fill-function)
- (> (prefix-numeric-value arg) 0))
- #'fortran-do-auto-fill
- nil))
- (force-mode-line-update)))
-
-(defun fortran-do-auto-fill ()
- (if (> (current-column) fill-column)
- (fortran-indent-line)))
-
-(defun fortran-fill ()
- (interactive)
- (let* ((auto-fill-function #'fortran-do-auto-fill)
- (opoint (point))
- (bol (save-excursion (beginning-of-line) (point)))
- (eol (save-excursion (end-of-line) (point)))
- (bos (min eol (+ bol (fortran-current-line-indentation))))
- (quote
- (save-excursion
- (goto-char bol)
- (if (looking-at comment-line-start-skip)
- nil ; OK to break quotes on comment lines.
- (move-to-column fill-column)
- (if (fortran-is-in-string-p (point))
- (save-excursion (re-search-backward "\\S\"\\s\"\\S\"" bol t)
- (if fortran-break-before-delimiters
- (point)
- (1+ (point))))))))
- ;; decide where to split the line. If a position for a quoted
- ;; string was found above then use that, else break the line
- ;; before the last delimiter.
- ;; Delimiters are whitespace, commas, and operators.
- ;; Will break before a pair of *'s.
- (fill-point
- (or quote
- (save-excursion
- (move-to-column (1+ fill-column))
- (skip-chars-backward "^ \t\n,'+-/*=)"
-;;; (if fortran-break-before-delimiters
-;;; "^ \t\n,'+-/*=" "^ \t\n,'+-/*=)")
- )
- (if (<= (point) (1+ bos))
- (progn
- (move-to-column (1+ fill-column))
- ;;what is this doing???
- (if (not (re-search-forward "[\t\n,'+-/*)=]" eol t))
- (goto-char bol))))
- (if (bolp)
- (re-search-forward "[ \t]" opoint t)
- (backward-char)
- (if (looking-at "\\s\"")
- (forward-char)
- (skip-chars-backward " \t\*")))
- (if fortran-break-before-delimiters
- (point)
- (1+ (point)))))))
- ;; if we are in an in-line comment, don't break unless the
- ;; line of code is longer than it should be. Otherwise
- ;; break the line at the column computed above.
- ;;
- ;; Need to use fortran-find-comment-start-skip to make sure that quoted !'s
- ;; don't prevent a break.
- (if (not (or (save-excursion
- (if (and (re-search-backward comment-start-skip bol t)
- (not (fortran-is-in-string-p (point))))
- (progn
- (skip-chars-backward " \t")
- (< (current-column) (1+ fill-column)))))
- (save-excursion
- (goto-char fill-point)
- (bolp))))
- (if (> (save-excursion
- (goto-char fill-point) (current-column))
- (1+ fill-column))
- (progn (goto-char fill-point)
- (fortran-break-line))
- (save-excursion
- (if (> (save-excursion
- (goto-char fill-point)
- (current-column))
- (+ (fortran-calculate-indent) fortran-continuation-indent))
- (progn
- (goto-char fill-point)
- (fortran-break-line))))))
- ))
-(defun fortran-break-line ()
- (let ((opoint (point))
- (bol (save-excursion (beginning-of-line) (point)))
- (eol (save-excursion (end-of-line) (point)))
- (comment-string nil))
-
- (save-excursion
- (if (and comment-start-skip (fortran-find-comment-start-skip))
- (progn
- (re-search-backward comment-start-skip bol t)
- (setq comment-string (buffer-substring (point) eol))
- (delete-region (point) eol))))
- ;; Forward line 1 really needs to go to next non white line
- (if (save-excursion (forward-line)
- (or (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]")))
- (progn
- (end-of-line)
- (delete-region (point) (match-end 0))
- (delete-horizontal-space)
- (fortran-fill))
- (fortran-split-line))
- (if comment-string
- (save-excursion
- (goto-char bol)
- (end-of-line)
- (delete-horizontal-space)
- (indent-to (fortran-comment-hook))
- (insert comment-string)))))
-
-(defun fortran-analyze-file-format ()
- "Return nil if fixed format is used, t if TAB formatting is used.
-Use `fortran-tab-mode-default' if no non-comment statements are found in the
-file before the end or the first `fortran-analyze-depth' lines."
- (let ((i 0))
- (save-excursion
- (goto-char (point-min))
- (setq i 0)
- (while (not (or
- (eobp)
- (looking-at "\t")
- (looking-at " ")
- (> i fortran-analyze-depth)))
- (forward-line)
- (setq i (1+ i)))
- (cond
- ((looking-at "\t") t)
- ((looking-at " ") nil)
- (fortran-tab-mode-default t)
- (t nil)))))
-
-(or (assq 'fortran-tab-mode-string minor-mode-alist)
- (setq minor-mode-alist (cons
- '(fortran-tab-mode-string
- (indent-tabs-mode fortran-tab-mode-string))
- minor-mode-alist)))
-
-(defun fortran-fill-paragraph (&optional justify)
- "Fill surrounding comment block as paragraphs, else fill statement.
-
-Intended as the value of `fill-paragraph-function'."
- (interactive "P")
- (save-excursion
- (beginning-of-line)
- (if (not (looking-at "[Cc*]"))
- (fortran-fill-statement)
- ;; We're in a comment block. Find the start and end of a
- ;; paragraph, delimited either by non-comment lines or empty
- ;; comments. (Get positions as markers, since the
- ;; `indent-region' below can shift the block's end).
- (let* ((non-empty-comment (concat "\\(" comment-line-start-skip
- "\\)" "[^ \t\n]"))
- (start (save-excursion
- ;; Find (start of) first line.
- (while (and (zerop (forward-line -1))
- (looking-at non-empty-comment)))
- (or (looking-at non-empty-comment)
- (forward-line)) ; overshot
- (point-marker)))
- (end (save-excursion
- ;; Find start of first line past region to fill.
- (while (progn (forward-line)
- (looking-at non-empty-comment)))
- (point-marker))))
- ;; Indent the block, find the string comprising the effective
- ;; comment start skip and use that as a fill-prefix for
- ;; filling the region.
- (indent-region start end nil)
- (let ((paragraph-ignore-fill-prefix nil)
- (fill-prefix (progn (beginning-of-line)
- (looking-at comment-line-start-skip)
- (match-string 0))))
- (let (fill-paragraph-function)
- (fill-region start end justify))) ; with normal `fill-paragraph'
- (set-marker start nil)
- (set-marker end nil))))
- t)
-
-(defun fortran-fill-statement ()
- "Fill a fortran statement up to `fill-column'."
- (interactive)
- (let ((auto-fill-function #'fortran-do-auto-fill))
- (if (not (save-excursion
- (beginning-of-line)
- (or (looking-at "[ \t]*$")
- (looking-at comment-line-start-skip)
- (and comment-start-skip
- (looking-at (concat "[ \t]*" comment-start-skip))))))
- (save-excursion
- ;; Find beginning of statement.
- (fortran-next-statement)
- (fortran-previous-statement)
- ;; Re-indent initially.
- (fortran-indent-line)
- ;; Replace newline plus continuation field plus indentation with
- ;; single space.
- (while (progn
- (forward-line)
- (fortran-remove-continuation)))
- (fortran-previous-statement)))
- (fortran-indent-line)))
-
-(provide 'fortran)
-
-;;; fortran.el ends here
+;;; fortran.el --- Fortran mode for GNU Emacs
+
+;; Copyright (C) 1986, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2001,
+;; 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+
+;; Author: Michael D. Prange <prange@erl.mit.edu>
+;; Maintainer: Glenn Morris <rgm@gnu.org>
+;; Keywords: fortran, 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., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+
+;;; Commentary:
+
+;; This mode is documented in the Emacs manual.
+;;
+;; Note that it is for editing Fortran77 or Fortran90 fixed source
+;; form. For editing Fortran 90 free format source, use `f90-mode'
+;; (f90.el). It is meant to support the GNU Fortran language
+;; implemented by g77 (its extensions to Fortran77 and
+;; interpretations, e.g. of blackslash in strings).
+
+;;; History:
+
+;; Fortran mode was upgraded by Stephen A. Wood (saw@cebaf.gov).
+
+;; We acknowledge many contributions and valuable suggestions by
+;; Lawrence R. Dodd, Ralf Fassel, Ralph Finch, Stephen Gildea,
+;; Dr. Anil Gokhale, Ulrich Mueller, Mark Neale, Eric Prestemon,
+;; Gary Sabot and Richard Stallman.
+
+;;; Code:
+
+;; Todo:
+
+;; * Tidy it all up (more)!
+;; * Implement insertion and removal of statement continuations in
+;; mixed f77/f90 style, with the first `&' past column 72 and the
+;; second in column 6.
+;; * Support any other extensions to f77 grokked by GNU Fortran I've missed.
+
+(eval-when-compile ; silence compiler
+ (defvar dabbrev-case-fold-search)
+ (defvar font-lock-syntactic-keywords)
+ (defvar gud-find-expr-function)
+ (defvar imenu-case-fold-search)
+ (defvar imenu-syntax-alist))
+
+
+(defgroup fortran nil
+ "Major mode for editing fixed format Fortran code."
+ :link '(custom-group-link :tag "Font Lock Faces group" font-lock-faces)
+ :link '(custom-manual "(emacs)Fortran")
+ :group 'languages)
+
+(defgroup fortran-indent nil
+ "Indentation variables in Fortran mode."
+ :prefix "fortran-"
+ :group 'fortran)
+
+(defgroup fortran-comment nil
+ "Comment-handling variables in Fortran mode."
+ :prefix "fortran-"
+ :group 'fortran)
+
+
+;;;###autoload
+(defcustom fortran-tab-mode-default nil
+ "*Default tabbing/carriage control style for empty files in Fortran mode.
+A non-nil value specifies tab-digit style of continuation control.
+A value of nil specifies that continuation lines are marked
+with a character in column 6."
+ :type 'boolean
+ :group 'fortran-indent)
+
+(defcustom fortran-tab-mode-string "/t"
+ "*String to appear in mode line in TAB format buffers."
+ :type 'string
+ :group 'fortran-indent)
+
+(defcustom fortran-do-indent 3
+ "*Extra indentation applied to DO blocks."
+ :type 'integer
+ :group 'fortran-indent)
+
+(defcustom fortran-if-indent 3
+ "*Extra indentation applied to IF, SELECT CASE and WHERE blocks."
+ :type 'integer
+ :group 'fortran-indent)
+
+(defcustom fortran-structure-indent 3
+ "*Extra indentation applied to STRUCTURE, UNION, MAP and INTERFACE blocks."
+ :type 'integer
+ :group 'fortran-indent)
+
+(defcustom fortran-continuation-indent 5
+ "*Extra indentation applied to continuation lines."
+ :type 'integer
+ :group 'fortran-indent)
+
+(defcustom fortran-comment-indent-style 'fixed
+ "*How to indent comments.
+nil forces comment lines not to be touched;
+`fixed' indents to `fortran-comment-line-extra-indent' columns beyond
+ `fortran-minimum-statement-indent-fixed' (if `indent-tabs-mode' nil), or
+ `fortran-minimum-statement-indent-tab' (if `indent-tabs-mode' non-nil);
+`relative' indents to current Fortran indentation plus
+ `fortran-comment-line-extra-indent'."
+ :type '(radio (const :tag "Untouched" nil) (const fixed) (const relative))
+ :group 'fortran-indent)
+
+(defcustom fortran-comment-line-extra-indent 0
+ "*Amount of extra indentation for text within full-line comments."
+ :type 'integer
+ :group 'fortran-indent
+ :group 'fortran-comment)
+
+(defcustom fortran-comment-line-start "C"
+ "*Delimiter inserted to start new full-line comment.
+You might want to change this to \"*\", for instance."
+ :version "21.1"
+ :type 'string
+ :group 'fortran-comment)
+
+;; This used to match preprocessor lines too, but that messes up
+;; filling and doesn't seem to be necessary.
+(defcustom fortran-comment-line-start-skip
+ "^[CcDd*!]\\(\\([^ \t\n]\\)\\2+\\)?[ \t]*"
+ "*Regexp to match the start of a full-line comment."
+ :version "21.1"
+ :type 'regexp
+ :group 'fortran-comment)
+
+(defcustom fortran-directive-re
+ "^[ \t]*#.*"
+ "*Regexp to match a directive line.
+The matching text will be fontified with `font-lock-keyword-face'.
+The matching line will be given zero indentation."
+ :version "22.1"
+ :type 'regexp
+ :group 'fortran-indent)
+
+(defcustom fortran-minimum-statement-indent-fixed 6
+ "*Minimum statement indentation for fixed format continuation style."
+ :type 'integer
+ :group 'fortran-indent)
+
+(defcustom fortran-minimum-statement-indent-tab (max tab-width 6)
+ "*Minimum statement indentation for TAB format continuation style."
+ :type 'integer
+ :group 'fortran-indent)
+
+;; 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.
+(defcustom fortran-comment-indent-char " "
+ "*Single-character string inserted for Fortran comment indentation.
+Normally a space."
+ :type 'string
+ :group 'fortran-comment)
+
+(defcustom fortran-line-number-indent 1
+ "*Maximum indentation for Fortran line numbers.
+5 means right-justify them within their five-column field."
+ :type 'integer
+ :group 'fortran-indent)
+
+(defcustom fortran-check-all-num-for-matching-do nil
+ "*Non-nil causes all numbered lines to be treated as possible DO loop ends."
+ :type 'boolean
+ :group 'fortran)
+
+(defcustom fortran-blink-matching-if nil
+ "*Non-nil causes \\[fortran-indent-line] on ENDIF to blink on matching IF.
+Also, from an ENDDO statement blink on matching DO [WHILE] statement."
+ :type 'boolean
+ :group 'fortran)
+
+(defcustom fortran-continuation-string "$"
+ "*Single-character string used for Fortran continuation lines.
+In fixed format continuation style, this character is inserted in
+column 6 by \\[fortran-split-line] to begin a continuation line.
+Also, if \\[fortran-indent-line] finds this at the beginning of a
+line, it will convert the line into a continuation line of the
+appropriate style. Normally $."
+ :type 'string
+ :group 'fortran)
+
+(defcustom fortran-comment-region "c$$$"
+ "*String inserted by \\[fortran-comment-region] at start of each \
+line in region."
+ :type 'string
+ :group 'fortran-comment)
+
+(defcustom fortran-electric-line-number t
+ "*Non-nil causes line numbers to be moved to the correct column as typed."
+ :type 'boolean
+ :group 'fortran)
+
+(defcustom fortran-column-ruler-fixed
+ "0 4 6 10 20 30 40 5\
+0 60 70\n\
+\[ ]|{ | | | | | | | | \
+\| | | | |}\n"
+ "String displayed above current line by \\[fortran-column-ruler].
+This variable is used in fixed format mode.
+See the variable `fortran-column-ruler-tab' for TAB format mode."
+ :type 'string
+ :group 'fortran)
+
+(defcustom fortran-column-ruler-tab
+ "0 810 20 30 40 5\
+0 60 70\n\
+\[ ]| { | | | | | | | | \
+\| | | | |}\n"
+ "String displayed above current line by \\[fortran-column-ruler].
+This variable is used in TAB format mode.
+See the variable `fortran-column-ruler-fixed' for fixed format mode."
+ :type 'string
+ :group 'fortran)
+
+(defcustom fortran-analyze-depth 100
+ "Number of lines to scan to identify fixed or TAB format style."
+ :type 'integer
+ :group 'fortran)
+
+(defcustom fortran-break-before-delimiters t
+ "*Non-nil causes filling to break lines before delimiters.
+Delimiters are characters matching the regexp `fortran-break-delimiters-re'."
+ :type 'boolean
+ :group 'fortran)
+
+(defconst fortran-break-delimiters-re "[-+*/><=, \t]"
+ "Regexp matching delimiter characters at which lines may be broken.
+There are certain tokens comprised entirely of characters
+matching this regexp that should not be split, and these are
+specified by the constant `fortran-no-break-re'.")
+
+;; The ">=", etc F77 extensions are supported by g77.
+(defconst fortran-no-break-re
+ (regexp-opt '("**" "//" "=>" ">=" "<=" "==" "/=") 'paren)
+ "Regexp specifying where not to break lines when filling.
+This regexp matches certain tokens comprised entirely of
+characters matching the regexp `fortran-break-delimiters-re' that should
+not be split by filling. Each element is assumed to be two
+characters long.")
+
+(defcustom fortran-mode-hook nil
+ "Hook run when entering Fortran mode."
+ :type 'hook
+ :group 'fortran)
+
+\f
+(defvar fortran-if-start-re "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?if[ \t]*("
+ "Regexp matching the start of an IF statement.")
+
+(defvar fortran-end-prog-re1
+ "end\
+\\([ \t]*\\(program\\|subroutine\\|function\\|block[ \t]*data\\)\\>\
+\\([ \t]*\\(\\sw\\|\\s_\\)+\\)?\\)?"
+ "Regexp possibly matching the end of a subprogram.")
+
+(defvar fortran-end-prog-re
+ (concat "^[ \t0-9]*" fortran-end-prog-re1)
+ "Regexp possibly matching the end of a subprogram, from the line start.
+See also `fortran-end-prog-re1'.")
+
+(defconst fortran-type-types
+ (concat "\\<"
+ (mapconcat 'identity ; " " -> "[ \t]*"
+ (split-string
+ (regexp-opt
+ (let ((simple-types
+ '("character" "byte" "integer" "logical"
+ "none" "real" "complex"
+ "double precision" "double complex"))
+ (structured-types '("structure" "union" "map"))
+ (other-types '("record" "dimension"
+ "parameter" "common" "save"
+ "external" "intrinsic" "data"
+ "equivalence")))
+ (append
+ (mapcar (lambda (x) (concat "implicit " x))
+ simple-types)
+ simple-types
+ (mapcar (lambda (x) (concat "end " x))
+ structured-types)
+ structured-types
+ other-types)) 'paren))
+ "[ \t]*") "\\>")
+ "Regexp matching Fortran types.")
+
+(defvar fortran-font-lock-keywords-1
+ ;; Program, subroutine and function declarations, plus calls.
+ '(("\\<\\(block[ \t]*data\\|call\\|entry\\|function\\|\
+program\\|subroutine\\)\\>[ \t]*\\(\\sw+\\)?"
+ (1 font-lock-keyword-face)
+ (2 font-lock-function-name-face nil t)))
+ "Subdued level highlighting for Fortran mode.")
+
+(defvar fortran-font-lock-keywords-2
+ (append fortran-font-lock-keywords-1
+ (list
+ ;; Fontify all type specifiers (must be first - see below).
+ (cons fortran-type-types 'font-lock-type-face)
+ ;; Builtin keywords (except logical, do and goto - see below).
+ (concat "\\<" (regexp-opt
+ '("continue" "format" "end" "enddo"
+ "if" "then" "else" "endif" "elseif"
+ "while" "inquire" "stop" "return"
+ "include" "open" "close" "read"
+ "write" "format" "print" "select" "case"
+ "cycle" "exit" "rewind" "backspace"
+ "where" "elsewhere")
+ 'paren) "\\>")
+ ;; Builtin operators.
+ (concat "\\." (regexp-opt
+ '("and" "or" "not" "lt" "le" "eq" "ge"
+ "gt" "ne" "true" "false")
+ 'paren) "\\.")
+ ;; do/goto keywords and targets, and goto tags.
+ '("\\<\\(do\\|go *to\\)\\>[ \t]*\\([0-9]+\\)?"
+ (1 font-lock-keyword-face)
+ (2 font-lock-constant-face nil t))
+ '("^ *\\([0-9]+\\)" . font-lock-constant-face)))
+ "Medium level highlighting for Fortran mode.")
+
+(defvar fortran-font-lock-keywords-3
+ (append
+ fortran-font-lock-keywords-1
+ ;; All type specifiers plus their declared items.
+ (list
+ (list (concat fortran-type-types "[ \t(/]*\\(*\\)?")
+ ;; Type specifier.
+ '(1 font-lock-type-face)
+ ;; Declaration item (or just /.../ block name).
+ `(font-lock-match-c-style-declaration-item-and-skip-to-next
+ ;; Start after any *(...) expression.
+ (condition-case nil
+ (and (match-beginning ,(1+ (regexp-opt-depth
+ fortran-type-types)))
+ (forward-sexp)
+ (forward-sexp))
+ (error nil))
+ ;; No need to clean up.
+ nil
+ ;; Fontify as a variable name, functions fontified elsewhere.
+ (1 font-lock-variable-name-face nil t))))
+ ;; Things extra to `fortran-font-lock-keywords-3' (must be done first).
+ (list
+ ;; Goto-like `err=label'/`end=label' in read/write statements.
+ '(", *\\(e\\(nd\\|rr\\)\\)\\> *\\(= *\\([0-9]+\\)\\)?"
+ (1 font-lock-keyword-face) (4 font-lock-constant-face nil t))
+ ;; Standard continuation character and in a TAB-formatted line.
+ '("^ \\{5\\}\\([^ 0\n]\\)" 1 font-lock-string-face)
+ '("^\t\\([1-9]\\)" 1 font-lock-string-face))
+ `((,fortran-directive-re (0 font-lock-keyword-face t)))
+ ;; `fortran-font-lock-keywords-2' without types (see above).
+ (cdr (nthcdr (length fortran-font-lock-keywords-1)
+ fortran-font-lock-keywords-2)))
+ "Gaudy level highlighting for Fortran mode.")
+
+(defvar fortran-font-lock-keywords-4
+ (append fortran-font-lock-keywords-3
+ (list (list
+ (concat "\\<"
+ (regexp-opt
+ '("int" "ifix" "idint" "real" "float" "sngl"
+ "dble" "cmplx" "ichar" "char" "aint" "dint"
+ "anint" "dnint" "nint" "idnint" "iabs" "abs"
+ "dabs" "cabs" "mod" "amod" "dmod" "isign"
+ "sign" "dsign" "idim" "dim" "ddim" "dprod"
+ "max" "max0" "amax1" "dmax1" "amax0" "max1"
+ "min0" "amin1" "dmin1" "amin0" "min1" "len"
+ "index" "lge" "lgt" "lle" "llt" "aimag"
+ "conjg" "sqrt" "dsqrt" "csqrt" "exp" "dexp"
+ "cexp" "log" "alog" "dlog" "clog" "log10"
+ "alog10" "dlog10" "sin" "dsin" "csin" "cos"
+ "dcos" "ccos" "tan" "dtan" "asin" "dasin"
+ "acos" "dacos" "atan" "datan" "atan2" "datan2"
+ "sinh" "dsinh" "cosh" "dcosh" "tanh" "dtanh")
+ 'paren) "[ \t]*(") '(1 font-lock-builtin-face))))
+ "Maximum highlighting for Fortran mode.
+Consists of level 3 plus all other intrinsics not already highlighted.")
+
+;; Comments are real pain in Fortran because there is no way to
+;; represent the standard comment syntax in an Emacs syntax table.
+;; (We can do so for F90-style). Therefore an unmatched quote in a
+;; standard comment will throw fontification off on the wrong track.
+;; So we do syntactic fontification with regexps.
+(defvar fortran-font-lock-syntactic-keywords
+ '(("^[cd\\*]" 0 (11))
+ ("^[^cd\\*\t\n].\\{71\\}\\([^\n]+\\)" 1 (11)))
+ "`font-lock-syntactic-keywords' for Fortran.
+These get fixed-format comments fontified.")
+
+(defvar fortran-font-lock-keywords fortran-font-lock-keywords-1
+ "Default expressions to highlight in Fortran mode.")
+
+(defvar fortran-imenu-generic-expression
+ ;; These patterns could be confused by sequence nos. in cols 72+ and
+ ;; don't allow continuations everywhere.
+ (list
+ (list
+ nil
+ ;; [This will be fooled by `end function' allowed by G77. Also,
+ ;; it assumes sensible whitespace is employed.]
+ (concat
+ ;; leading whitespace:
+ "^\\s-+\\("
+ ;; function declaration with optional type, e.g. `real',
+ ;; `real*4', character(*), `double precision':
+ "\\(\\sw\\|\\s-\\|[*()+]\\)*"
+ "\\<function\\|subroutine\\|entry\\|block\\s-*data\\|program\\)"
+ ;; Possible statement continuation:
+ "[ \t" fortran-continuation-string "]+"
+ ;; Variable to index:
+ "\\(\\sw+\\)")
+ 3)
+ ;; Un-named block data.
+ '(nil "^\\s-+\\(block\\s-*data\\)\\s-*$" 1))
+ "Value for `imenu-generic-expression' in Fortran mode.")
+
+\f
+;; Hideshow support.
+(defconst fortran-blocks-re
+ (concat "block[ \t]*data\\|select[ \t]*case\\|"
+ (regexp-opt '("do" "if" "interface" "function" "map" "program"
+ "structure" "subroutine" "union" "where")))
+ "Regexp potentially indicating the start or end of a Fortran \"block\".
+Omits naked END statements, and DO-loops closed by anything other
+than ENDDO.")
+
+(defconst fortran-end-block-re
+ ;; Do-loops terminated by things other than ENDDO cannot be handled
+ ;; with a regexp. This omission does not seem to matter to hideshow...
+ (concat "^[ \t0-9]*\\<end[ \t]*\\("
+ fortran-blocks-re
+ ;; Naked END statement.
+ "\\|!\\|$\\)")
+ "Regexp matching the end of a Fortran \"block\", from the line start.
+Note that only ENDDO is handled for the end of a DO-loop. Used
+in the Fortran entry in `hs-special-modes-alist'.")
+
+(defconst fortran-start-block-re
+ (concat
+ "^[ \t0-9]*\\(" ; statement number
+ ;; Structure label for DO, IF, SELECT, WHERE.
+ "\\(\\(\\sw+[ \t]*:[ \t]*\\)?"
+ ;; IF blocks are a nuisance:
+ ;; IF ( ... ) foo is not a block, but a single statement.
+ ;; IF ( ... ) THEN can be split over multiple lines.
+ ;; [So can, eg, a DO WHILE (... ), but that is less common, I hope.]
+ ;; The regexp below allows for it to be split over at most 2 lines.
+ ;; That leads to the problem of not matching two consecutive IF
+ ;; statements as one, eg:
+ ;; IF ( ... ) foo
+ ;; IF ( ... ) THEN
+ ;; It simply is not possible to do this in a 100% correct fashion
+ ;; using a regexp - see the functions fortran-end-if,
+ ;; fortran-beginning-if for the hoops we have to go through.
+ ;; An alternative is to match on THEN at a line end, eg:
+ ;; ".*)[ \t]*then[ \t]*\\($\\|!\\)"
+ ;; This would also match ELSE branches, though. This does not seem
+ ;; right to me, because then one has neighbouring blocks that are
+ ;; not nested in each other.
+ "\\(if[ \t]*(\\(.*\\|"
+ ".*\n\\([^if]*\\([^i].\\|.[^f]\\|.\\>\\)\\)\\)\\<then\\|"
+ "do\\|select[ \t]*case\\|where\\)\\)\\|"
+ (regexp-opt '("interface" "function" "map" "program"
+ "structure" "subroutine" "union"))
+ "\\|block[ \t]*data\\)[ \t]*")
+ "Regexp matching the start of a Fortran \"block\", from the line start.
+A simple regexp cannot do this in fully correct fashion, so this
+tries to strike a compromise between complexity and flexibility.
+Used in the Fortran entry in `hs-special-modes-alist'.")
+
+(add-to-list 'hs-special-modes-alist
+ `(fortran-mode ,fortran-start-block-re ,fortran-end-block-re
+ "^[cC*!]" fortran-end-of-block nil))
+
+\f
+(defvar fortran-mode-syntax-table
+ (let ((table (make-syntax-table)))
+ ;; We might like `;' to be punctuation (g77 multi-statement
+ ;; lines), but that screws abbrevs.
+ (modify-syntax-entry ?\; "w" table)
+ (modify-syntax-entry ?\r " " table)
+ (modify-syntax-entry ?+ "." table)
+ (modify-syntax-entry ?- "." table)
+ (modify-syntax-entry ?= "." table)
+ (modify-syntax-entry ?* "." table)
+ (modify-syntax-entry ?/ "." table)
+ (modify-syntax-entry ?\' "\"" table)
+ (modify-syntax-entry ?\" "\"" table)
+ ;; Consistent with GNU Fortran's default -- see the manual.
+ ;; The F77 standard imposes no rule on this issue.
+ (modify-syntax-entry ?\\ "\\" table)
+ ;; This might be better as punctuation, as for C, but this way you
+ ;; can treat floating-point numbers as symbols.
+ (modify-syntax-entry ?. "_" table) ; e.g. `a.ne.b'
+ (modify-syntax-entry ?_ "_" table)
+ (modify-syntax-entry ?$ "_" table) ; esp. VMSisms
+ (modify-syntax-entry ?\! "<" table)
+ (modify-syntax-entry ?\n ">" table)
+ table)
+ "Syntax table used in Fortran mode.")
+
+(defvar fortran-gud-syntax-table
+ (let ((st (make-syntax-table fortran-mode-syntax-table)))
+ (modify-syntax-entry ?\n "." st)
+ st)
+ "Syntax table used to parse Fortran expressions for printing in GUD.")
+
+(defvar fortran-mode-map
+ (let ((map (make-sparse-keymap)))
+ (define-key map ";" 'fortran-abbrev-start)
+ (define-key map "\C-c;" 'fortran-comment-region)
+ (define-key map "\M-;" 'fortran-indent-comment)
+ (define-key map "\M-\n" 'fortran-split-line)
+ (define-key map "\M-\C-n" 'fortran-end-of-block)
+ (define-key map "\M-\C-p" 'fortran-beginning-of-block)
+ (define-key map "\M-\C-q" 'fortran-indent-subprogram)
+ (define-key map "\C-c\C-w" 'fortran-window-create-momentarily)
+ (define-key map "\C-c\C-r" 'fortran-column-ruler)
+ (define-key map "\C-c\C-p" 'fortran-previous-statement)
+ (define-key map "\C-c\C-n" 'fortran-next-statement)
+ (define-key map "\C-c\C-d" 'fortran-join-line) ; like f90
+ (define-key map "\M-^" 'fortran-join-line) ; subvert delete-indentation
+ (define-key map "0" 'fortran-electric-line-number)
+ (define-key map "1" 'fortran-electric-line-number)
+ (define-key map "2" 'fortran-electric-line-number)
+ (define-key map "3" 'fortran-electric-line-number)
+ (define-key map "4" 'fortran-electric-line-number)
+ (define-key map "5" 'fortran-electric-line-number)
+ (define-key map "6" 'fortran-electric-line-number)
+ (define-key map "7" 'fortran-electric-line-number)
+ (define-key map "8" 'fortran-electric-line-number)
+ (define-key map "9" 'fortran-electric-line-number)
+
+ (easy-menu-define fortran-menu map "Menu for Fortran mode."
+ `("Fortran"
+ ["Manual" (info "(emacs)Fortran")]
+ ("Customization"
+ ,(custom-menu-create 'fortran)
+ ["Set" Custom-set t]
+ ["Save" Custom-save t]
+ ["Reset to Current" Custom-reset-current t]
+ ["Reset to Saved" Custom-reset-saved t]
+ ["Reset to Standard Settings" Custom-reset-standard t]
+ )
+ "--"
+ ["Comment Region" fortran-comment-region mark-active]
+ ["Uncomment Region"
+ (fortran-comment-region (region-beginning) (region-end) 1)
+ mark-active]
+ ["Indent Region" indent-region mark-active]
+ ["Indent Subprogram" fortran-indent-subprogram t]
+ "--"
+ ["Beginning of Subprogram" fortran-beginning-of-subprogram t]
+ ["End of Subprogram" fortran-end-of-subprogram t]
+ ("Mark"
+ ["Subprogram" mark-defun t]
+ ["IF Block" fortran-mark-if t]
+ ["DO Block" fortran-mark-do t]
+ )
+ ["Narrow to Subprogram" narrow-to-defun t]
+ ["Widen" widen t]
+ "--"
+ ["Temporary column ruler" fortran-column-ruler t]
+ ["72-column window" fortran-window-create t]
+ ["Full Width Window"
+ (enlarge-window-horizontally (- (frame-width) (window-width)))
+ (< (window-width) (frame-width))]
+ ["Momentary 72-column window" fortran-window-create-momentarily t]
+ "--"
+ ["Break Line at Point" fortran-split-line t]
+ ["Join Line" fortran-join-line t]
+ ["Fill Statement/Comment" fill-paragraph t]
+ "--"
+ ["Toggle auto-fill" auto-fill-mode :selected auto-fill-function
+ :style toggle]
+ ["Toggle abbrev-mode" abbrev-mode :selected abbrev-mode
+ :style toggle]
+ ["Add imenu Menu" imenu-add-menubar-index
+ :active (not (lookup-key (current-local-map) [menu-bar index]))
+ :included (fboundp 'imenu-add-to-menubar)]))
+ map)
+ "Keymap used in Fortran mode.")
+
+\f
+(defvar fortran-mode-abbrev-table
+ (let (abbrevs-changed)
+ (define-abbrev-table 'fortran-mode-abbrev-table nil)
+ ;; Use the 6th arg (SYSTEM-FLAG) of define-abbrev if possible.
+ ;; Only use `apply' to quieten the byte-compiler.
+ (mapcar
+ (function (lambda (element)
+ (condition-case nil
+ (apply 'define-abbrev fortran-mode-abbrev-table
+ (append element '(nil 0 t)))
+ (wrong-number-of-arguments
+ (apply 'define-abbrev fortran-mode-abbrev-table
+ (append element '(nil 0)))))))
+ '((";au" "automatic" )
+ (";b" "byte" )
+ (";bd" "block data" )
+ (";ch" "character" )
+ (";cl" "close" )
+ (";c" "continue" )
+ (";cm" "common" )
+ (";cx" "complex" )
+ (";df" "define" )
+ (";di" "dimension" )
+ (";do" "double" )
+ (";dc" "double complex" )
+ (";dp" "double precision" )
+ (";dw" "do while" )
+ (";e" "else" )
+ (";ed" "enddo" )
+ (";el" "elseif" )
+ (";en" "endif" )
+ (";eq" "equivalence" )
+ (";ew" "endwhere" )
+ (";ex" "external" )
+ (";ey" "entry" )
+ (";f" "format" )
+ (";fa" ".false." )
+ (";fu" "function" )
+ (";g" "goto" )
+ (";im" "implicit" )
+ (";ib" "implicit byte" )
+ (";ic" "implicit complex" )
+ (";ich" "implicit character")
+ (";ii" "implicit integer" )
+ (";il" "implicit logical" )
+ (";ir" "implicit real" )
+ (";inc" "include" )
+ (";in" "integer" )
+ (";intr" "intrinsic" )
+ (";l" "logical" )
+ (";n" "namelist" )
+ (";o" "open" ) ; was ;op
+ (";pa" "parameter" )
+ (";pr" "program" )
+ (";ps" "pause" )
+ (";p" "print" )
+ (";rc" "record" )
+ (";re" "real" )
+ (";r" "read" )
+ (";rt" "return" )
+ (";rw" "rewind" )
+ (";s" "stop" )
+ (";sa" "save" )
+ (";st" "structure" )
+ (";sc" "static" )
+ (";su" "subroutine" )
+ (";tr" ".true." )
+ (";ty" "type" )
+ (";vo" "volatile" )
+ (";w" "write" )
+ (";wh" "where" )))
+ fortran-mode-abbrev-table))
+
+\f
+
+;;;###autoload
+(defun fortran-mode ()
+ "Major mode for editing Fortran code in fixed format.
+For free format code, use `f90-mode'.
+
+\\[fortran-indent-line] indents the current Fortran line correctly.
+Note that DO statements must not share a common CONTINUE.
+
+Type ;? or ;\\[help-command] to display a list of built-in abbrevs for\
+ Fortran keywords.
+
+Key definitions:
+\\{fortran-mode-map}
+
+Variables controlling indentation style and extra features:
+
+`fortran-comment-line-start'
+ 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-structure-indent'
+ Extra indentation within STRUCTURE, UNION, MAP and INTERFACE blocks.
+ (default 3)
+`fortran-continuation-indent'
+ Extra indentation applied to continuation statements (default 5).
+`fortran-comment-line-extra-indent'
+ Amount of extra indentation for text in full-line comments (default 0).
+`fortran-comment-indent-style'
+ How to indent the text in full-line comments. Allowed values are:
+ nil don't change the indentation
+ fixed indent to `fortran-comment-line-extra-indent' beyond the
+ value of either
+ `fortran-minimum-statement-indent-fixed' (fixed format) or
+ `fortran-minimum-statement-indent-tab' (TAB format),
+ depending on the continuation format in use.
+ relative indent to `fortran-comment-line-extra-indent' beyond the
+ indentation for a line of code.
+ (default 'fixed)
+`fortran-comment-indent-char'
+ Single-character string to be inserted instead of space for
+ full-line comment indentation (default \" \").
+`fortran-minimum-statement-indent-fixed'
+ Minimum indentation for statements in fixed format mode (default 6).
+`fortran-minimum-statement-indent-tab'
+ Minimum indentation for statements in TAB format mode (default 9).
+`fortran-line-number-indent'
+ Maximum indentation for line numbers (default 1). A line number will
+ get less than this much indentation if necessary to avoid reaching
+ column 5.
+`fortran-check-all-num-for-matching-do'
+ Non-nil causes all numbered lines to be treated as possible \"continue\"
+ statements (default nil).
+`fortran-blink-matching-if'
+ Non-nil causes \\[fortran-indent-line] on an ENDIF (or ENDDO) statement
+ to blink on the matching IF (or DO [WHILE]). (default nil)
+`fortran-continuation-string'
+ Single-character string 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
+ the region (default \"c$$$\").
+`fortran-electric-line-number'
+ Non-nil causes line number digits to be moved to the correct column
+ as typed (default t).
+`fortran-break-before-delimiters'
+ Non-nil causes lines to be broken before delimiters (default t).
+
+Turning on Fortran mode calls the value of the variable `fortran-mode-hook'
+with no args, if that value is non-nil."
+ (interactive)
+ (kill-all-local-variables)
+ (setq major-mode 'fortran-mode
+ mode-name "Fortran"
+ local-abbrev-table fortran-mode-abbrev-table)
+ (set-syntax-table fortran-mode-syntax-table)
+ (use-local-map fortran-mode-map)
+ (set (make-local-variable 'indent-line-function) 'fortran-indent-line)
+ (set (make-local-variable 'indent-region-function)
+ (lambda (start end)
+ (let (fortran-blink-matching-if ; avoid blinking delay
+ indent-region-function)
+ (indent-region start end nil))))
+ (set (make-local-variable 'require-final-newline) mode-require-final-newline)
+ ;; The syntax tables don't understand the column-0 comment-markers.
+ (set (make-local-variable 'comment-use-syntax) nil)
+ (set (make-local-variable 'comment-padding) "$$$")
+ (set (make-local-variable 'comment-start) fortran-comment-line-start)
+ (set (make-local-variable 'comment-start-skip)
+ ;; We can't reuse `fortran-comment-line-start-skip' directly because
+ ;; it contains backrefs whereas we need submatch-1 to end at the
+ ;; beginning of the comment delimiter.
+ ;; (concat "\\(\\)\\(![ \t]*\\|" fortran-comment-line-start-skip "\\)")
+ "\\(\\)\\(?:^[CcDd*]\\|!\\)\\(?:\\([^ \t\n]\\)\\2+\\)?[ \t]*")
+ (set (make-local-variable 'comment-indent-function) 'fortran-comment-indent)
+ (set (make-local-variable 'abbrev-all-caps) t)
+ (set (make-local-variable 'normal-auto-fill-function) 'fortran-auto-fill)
+ (set (make-local-variable 'indent-tabs-mode) (fortran-analyze-file-format))
+ (setq mode-line-process '(indent-tabs-mode fortran-tab-mode-string))
+ (set (make-local-variable 'fill-column) 72)
+ (set (make-local-variable 'fill-paragraph-function) 'fortran-fill-paragraph)
+ (set (make-local-variable 'font-lock-defaults)
+ '((fortran-font-lock-keywords
+ fortran-font-lock-keywords-1
+ fortran-font-lock-keywords-2
+ fortran-font-lock-keywords-3
+ fortran-font-lock-keywords-4)
+ nil t ((?/ . "$/") ("_$" . "w"))
+ fortran-beginning-of-subprogram))
+ (set (make-local-variable 'font-lock-syntactic-keywords)
+ fortran-font-lock-syntactic-keywords)
+ (set (make-local-variable 'imenu-case-fold-search) t)
+ (set (make-local-variable 'imenu-generic-expression)
+ fortran-imenu-generic-expression)
+ (set (make-local-variable 'imenu-syntax-alist) '(("_$" . "w")))
+ (set (make-local-variable 'beginning-of-defun-function)
+ #'fortran-beginning-of-subprogram)
+ (set (make-local-variable 'end-of-defun-function)
+ #'fortran-end-of-subprogram)
+ (set (make-local-variable 'add-log-current-defun-function)
+ #'fortran-current-defun)
+ (set (make-local-variable 'dabbrev-case-fold-search) 'case-fold-search)
+ (set (make-local-variable 'gud-find-expr-function) 'fortran-gud-find-expr)
+ (run-mode-hooks 'fortran-mode-hook))
+
+\f
+(defun fortran-gud-find-expr ()
+ ;; Consider \n as punctuation (end of expression).
+ (with-syntax-table fortran-gud-syntax-table
+ (gud-find-c-expr)))
+
+(defsubst fortran-comment-indent ()
+ "Return the indentation appropriate for the current comment line.
+This is 0 for a line matching `fortran-comment-line-start-skip', else
+the value of `comment-column' (leaving at least one space after code)."
+ (if (looking-at fortran-comment-line-start-skip) 0
+ (save-excursion
+ (skip-chars-backward " \t")
+ (max (1+ (current-column)) comment-column))))
+
+(defun fortran-indent-comment ()
+ "Align or create comment on current line.
+Existing comments of all types are recognized and aligned.
+If the line has no comment, a side-by-side comment is inserted and aligned,
+if the value of `comment-start' is not nil and allows such comments.
+Otherwise, a separate-line comment is inserted, on this line
+or on a new line inserted before this line if this line is not blank."
+ (interactive "*")
+ (beginning-of-line)
+ ;; Recognize existing comments of either kind.
+ (cond ((fortran-find-comment-start-skip 'all)
+ (goto-char (match-beginning 0))
+ (if (bolp)
+ (fortran-indent-line)
+ (unless (= (current-column) (fortran-comment-indent))
+ (delete-horizontal-space)
+ (indent-to (fortran-comment-indent)))))
+ ;; No existing comment.
+ ;; If side-by-side comments are defined, insert one,
+ ;; unless line is now blank.
+ ((and comment-start (not (looking-at "[ \t]*$"))
+ (string-match comment-start-skip (concat " " comment-start)))
+ (end-of-line)
+ (delete-horizontal-space)
+ (indent-to (fortran-comment-indent))
+ (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 fortran-comment-line-start)
+ (insert-char (if (stringp fortran-comment-indent-char)
+ (aref fortran-comment-indent-char 0)
+ fortran-comment-indent-char)
+ (- (fortran-calculate-indent) (current-column))))))
+
+(defun fortran-comment-region (beg-region end-region arg)
+ "Comment every line in the region.
+Inserts the string variable `fortran-comment-region' at the beginning of
+every line in the region.
+BEG-REGION and END-REGION specify the region boundaries.
+With non-nil ARG, uncomments the region."
+ (interactive "*r\nP")
+ (let ((end-region-mark (copy-marker end-region))
+ (save-point (point-marker)))
+ (goto-char beg-region)
+ (beginning-of-line)
+ (if arg
+ (let ((com (regexp-quote fortran-comment-region))) ; uncomment
+ (if (looking-at com)
+ (delete-region (point) (match-end 0)))
+ (while (and (zerop (forward-line 1))
+ (< (point) end-region-mark))
+ (if (looking-at com)
+ (delete-region (point) (match-end 0)))))
+ (insert fortran-comment-region) ; comment
+ (while (and (zerop (forward-line 1))
+ (< (point) end-region-mark))
+ (insert fortran-comment-region)))
+ (goto-char save-point)
+ (set-marker end-region-mark nil)
+ (set-marker save-point nil)))
+
+\f
+(defun fortran-abbrev-start ()
+ "Typing ;\\[help-command] or ;? lists all the Fortran abbrevs.
+Any other key combination is executed normally."
+ (interactive "*")
+ (insert last-command-char)
+ (let (char event)
+ (if (fboundp 'next-command-event) ; XEmacs
+ (setq event (next-command-event)
+ char (event-to-character event))
+ (setq event (read-event)
+ char event))
+ ;; Insert char if not equal to `?', or if abbrev-mode is off.
+ (if (and abbrev-mode (or (eq char ??) (eq char help-char)))
+ (fortran-abbrev-help)
+ (setq unread-command-events (list event)))))
+
+(defun fortran-abbrev-help ()
+ "List the currently defined abbrevs in Fortran mode."
+ (interactive)
+ (message "Listing abbrev table...")
+ (display-buffer (fortran-prepare-abbrev-list-buffer))
+ (message "Listing abbrev table...done"))
+
+(defun fortran-prepare-abbrev-list-buffer ()
+ "Create a buffer listing the Fortran mode abbreviations."
+ (save-excursion
+ (set-buffer (get-buffer-create "*Abbrevs*"))
+ (erase-buffer)
+ (insert-abbrev-table-description 'fortran-mode-abbrev-table t)
+ (goto-char (point-min))
+ (set-buffer-modified-p nil)
+ (edit-abbrevs-mode))
+ (get-buffer-create "*Abbrevs*"))
+
+(defun fortran-column-ruler ()
+ "Insert a column ruler momentarily above current line, till next keystroke.
+The ruler is defined by the value of `fortran-column-ruler-fixed' in fixed
+format mode, and `fortran-column-ruler-tab' in TAB format mode.
+The next key typed is executed unless it is SPC."
+ (interactive)
+ (momentary-string-display
+ (if indent-tabs-mode
+ fortran-column-ruler-tab
+ fortran-column-ruler-fixed)
+ (save-excursion
+ (beginning-of-line)
+ (if (eq (window-start (selected-window))
+ (window-point (selected-window)))
+ (line-beginning-position 2)
+ (point)))
+ nil "Type SPC or any command to erase ruler."))
+
+(defun fortran-window-create ()
+ "Make the window 72 columns wide.
+See also `fortran-window-create-momentarily'."
+ (interactive)
+ (let ((window-min-width 2))
+ (if (< (window-width) (frame-width))
+ (enlarge-window-horizontally (- (frame-width)
+ (window-width) 1)))
+ (let* ((window-edges (window-edges))
+ (scroll-bar-width (- (nth 2 window-edges)
+ (car window-edges)
+ (window-width))))
+ (split-window-horizontally (+ 72 scroll-bar-width)))
+ (other-window 1)
+ (switch-to-buffer " fortran-window-extra" t)
+ (select-window (previous-window))))
+
+(defun fortran-window-create-momentarily (&optional arg)
+ "Momentarily make the window 72 columns wide.
+Optional ARG non-nil and non-unity disables the momentary feature.
+See also `fortran-window-create'."
+ (interactive "p")
+ (if (or (not arg)
+ (= arg 1))
+ (save-window-excursion
+ (progn
+ (condition-case nil
+ (fortran-window-create)
+ (error (error "No room for Fortran window")))
+ (message "Type SPC to continue editing.")
+ (let ((char (read-event)))
+ (or (equal char (string-to-char " "))
+ (setq unread-command-events (list char))))))
+ (fortran-window-create)))
+
+(defun fortran-split-line ()
+ "Break line at point and insert continuation marker and alignment."
+ (interactive "*")
+ (delete-horizontal-space)
+ (if (save-excursion
+ (let ((pos (point)))
+ (beginning-of-line)
+ (and (fortran-find-comment-start-skip 'all)
+ (< (match-beginning 0) pos))))
+ (insert ?\n (match-string 0))
+ (if indent-tabs-mode
+ (insert ?\n ?\t (fortran-numerical-continuation-char))
+ (insert "\n " fortran-continuation-string))) ; space after \n important
+ (fortran-indent-line)) ; when cont string is C, c or *
+
+(defun fortran-remove-continuation ()
+ "Delete any Fortran continuation characters at point.
+Returns t if anything actually deleted."
+ (when (looking-at "\\( \\{5\\}[^ 0\n]\\|\t[1-9]\\|&\\)")
+ (replace-match "")
+ (delete-indentation)
+ t))
+
+(defun fortran-join-line (arg)
+ "Join current line to the previous one and re-indent.
+With a prefix argument, repeat this operation that many times.
+If the prefix argument ARG is negative, join the next -ARG lines.
+Continuation lines are correctly handled."
+ (interactive "*p")
+ (save-excursion
+ (when (> 0 arg)
+ (setq arg (- arg))
+ (forward-line arg))
+ (while (not (zerop arg))
+ (beginning-of-line)
+ (or (fortran-remove-continuation)
+ (delete-indentation))
+ (setq arg (1- arg)))
+ (fortran-indent-line)))
+
+(defun fortran-numerical-continuation-char ()
+ "Return a digit for tab-digit style of continuation lines.
+If previous line is a tab-digit continuation line, return that digit
+plus one, otherwise return 1. Zero not allowed."
+ (save-excursion
+ (forward-line -1)
+ (if (looking-at "\t[1-9]")
+ (+ ?1 (% (- (char-after (1+ (point))) ?0) 9))
+ ?1)))
+
+(put 'fortran-electric-line-number 'delete-selection t)
+(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))
+ (if arg
+ (self-insert-command (prefix-numeric-value arg))
+ (self-insert-command 1))
+ (if (or (and (= 5 (current-column))
+ (save-excursion
+ (beginning-of-line)
+ ;; In col 5 with only spaces to the left.
+ (looking-at " \\{5\\}")))
+ (and (= (if indent-tabs-mode
+ fortran-minimum-statement-indent-tab
+ fortran-minimum-statement-indent-fixed) (current-column))
+ ;; In col 8 with a single tab to the left.
+ (eq ?\t (char-after (line-beginning-position)))
+ (not (or (eq last-command 'fortran-indent-line)
+ (eq last-command
+ 'fortran-indent-new-line))))
+ (save-excursion
+ (re-search-backward "[^ \t0-9]"
+ (line-beginning-position)
+ t)) ; not a line number
+ (looking-at "[0-9]")) ; within a line number
+ (self-insert-command (prefix-numeric-value arg))
+ (skip-chars-backward " \t")
+ (insert last-command-char)
+ (fortran-indent-line))))
+
+\f
+(defun fortran-check-end-prog-re ()
+ "Check a preliminary match against `fortran-end-prog-re'."
+ ;; Having got a possible match for the subprogram end, we need a
+ ;; match of whitespace, avoiding possible column 73+ stuff.
+ (save-match-data
+ (string-match "^\\s-*\\(\\'\\|\\s<\\)"
+ (buffer-substring (match-end 0)
+ (min (line-end-position)
+ (+ 72 (line-beginning-position)))))))
+
+;; Note that you can't just check backwards for `subroutine' &c in
+;; case of un-marked main programs not at the start of the file.
+(defun fortran-beginning-of-subprogram ()
+ "Move point to the beginning of the current Fortran subprogram."
+ (interactive)
+ (save-match-data
+ (let ((case-fold-search t))
+ (beginning-of-line -1)
+ (if (catch 'ok
+ (while (re-search-backward fortran-end-prog-re nil 'move)
+ (if (fortran-check-end-prog-re)
+ (throw 'ok t))))
+ (forward-line)))))
+
+(defun fortran-end-of-subprogram ()
+ "Move point to the end of the current Fortran subprogram."
+ (interactive)
+ (save-match-data
+ (let ((case-fold-search t))
+ (if (save-excursion ; on END
+ (beginning-of-line)
+ (and (looking-at fortran-end-prog-re)
+ (fortran-check-end-prog-re)))
+ (forward-line)
+ (beginning-of-line 2)
+ (catch 'ok
+ (while (re-search-forward fortran-end-prog-re nil 'move)
+ (if (fortran-check-end-prog-re)
+ (throw 'ok t))))
+ (goto-char (match-beginning 0))
+ (forward-line)))))
+
+(defun fortran-previous-statement ()
+ "Move 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.
+Directive lines are treated as comments."
+ (interactive)
+ (let (not-first-statement continue-test)
+ (beginning-of-line)
+ (setq continue-test
+ (and
+ (not (looking-at fortran-comment-line-start-skip))
+ (not (looking-at fortran-directive-re))
+ (or (looking-at
+ (concat "[ \t]*"
+ (regexp-quote fortran-continuation-string)))
+ (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]"))))
+ (while (and (setq not-first-statement (zerop (forward-line -1)))
+ (or (looking-at fortran-comment-line-start-skip)
+ (looking-at fortran-directive-re)
+ (looking-at
+ (concat "[ \t]*"
+ (regexp-quote fortran-continuation-string)))
+ (looking-at "[ \t]*$\\| \\{5\\}[^ 0\n]\\|\t[1-9]")
+ (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 ()
+ "Move 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.
+Directive lines are treated as comments."
+ (interactive)
+ (let (not-last-statement)
+ (beginning-of-line)
+ (while (and (setq not-last-statement
+ (and (zerop (forward-line 1))
+ (not (eobp))))
+ (or (looking-at fortran-comment-line-start-skip)
+ (looking-at fortran-directive-re)
+ (looking-at "[ \t]*$\\| [^ 0\n]\\|\t[1-9]")
+ (looking-at (concat "[ \t]*" comment-start-skip)))))
+ (if (not not-last-statement)
+ 'last-statement)))
+
+(defun fortran-looking-at-if-then ()
+ "Return non-nil if at the start of a line with an IF ... THEN statement."
+ ;; cf f90-looking-at-if-then.
+ (let ((p (point))
+ (i (fortran-beginning-if)))
+ (if i
+ (save-excursion
+ (goto-char i)
+ (beginning-of-line)
+ (= (point) p)))))
+
+;; Used in hs-special-modes-alist.
+(defun fortran-end-of-block (&optional num)
+ "Move point forward to the end of the current code block.
+With optional argument NUM, go forward that many balanced blocks.
+If NUM is negative, go backward to the start of a block. Does
+not check for consistency of block types. Interactively, pushes
+mark before moving point."
+ (interactive "p")
+ (if (interactive-p) (push-mark (point) t))
+ (and num (< num 0) (fortran-beginning-of-block (- num)))
+ (let ((case-fold-search t)
+ (count (or num 1)))
+ (end-of-line)
+ (while (and (> count 0)
+ (re-search-forward
+ (concat "\\(" fortran-blocks-re
+ (if fortran-check-all-num-for-matching-do
+ "\\|^[ \t]*[0-9]+" "")
+ "\\|continue\\|end\\)\\>")
+ nil 'move))
+ (beginning-of-line)
+ (if (if (looking-at (concat "^[0-9 \t]*" fortran-if-start-re))
+ (fortran-looking-at-if-then)
+ (looking-at fortran-start-block-re))
+ (setq count (1+ count))
+ (if (or (looking-at fortran-end-block-re)
+ (and (or (looking-at "^[0-9 \t]*continue")
+ (and fortran-check-all-num-for-matching-do
+ (looking-at "[ \t]*[0-9]+")))
+ (fortran-check-for-matching-do)))
+ (setq count (1- count))))
+ (end-of-line))
+ (if (> count 0) (error "Missing block end"))))
+
+(defun fortran-beginning-of-block (&optional num)
+ "Move point backwards to the start of the current code block.
+With optional argument NUM, go backward that many balanced
+blocks. If NUM is negative, go forward to the end of a block.
+Does not check for consistency of block types. Interactively,
+pushes mark before moving point."
+ (interactive "p")
+ (if (interactive-p) (push-mark (point) t))
+ (and num (< num 0) (fortran-end-of-block (- num)))
+ (let ((case-fold-search t)
+ (count (or num 1)))
+ (beginning-of-line)
+ (while (and (> count 0)
+ (re-search-backward
+ (concat "\\(" fortran-blocks-re
+ (if fortran-check-all-num-for-matching-do
+ "\\|^[ \t]*[0-9]+" "")
+ "\\|continue\\|end\\)\\>")
+ nil 'move))
+ (beginning-of-line)
+ (if (if (looking-at (concat "^[0-9 \t]*" fortran-if-start-re))
+ (fortran-looking-at-if-then)
+ (looking-at fortran-start-block-re))
+ (setq count (1- count))
+ (if (or (looking-at fortran-end-block-re)
+ (and (or (looking-at "^[0-9 \t]*continue")
+ (and fortran-check-all-num-for-matching-do
+ (looking-at "[ \t]*[0-9]+")))
+ (fortran-check-for-matching-do)))
+ (setq count (1+ count)))))
+ ;; Includes an un-named main program block.
+ (if (> count 0) (error "Missing block start"))))
+
+\f
+(defun fortran-blink-match (regex keyword find-begin)
+ "From a line matching REGEX, blink matching KEYWORD statement line.
+Use function FIND-BEGIN to match it."
+ (let ((top-of-window (window-start))
+ (end-point (point))
+ (case-fold-search t)
+ matching
+ message)
+ (when (save-excursion
+ (beginning-of-line)
+ (skip-chars-forward " \t0-9")
+ (looking-at regex))
+ (if (not (setq matching (funcall find-begin)))
+ (setq message (concat "No matching " keyword "."))
+ (if (< matching top-of-window)
+ (save-excursion
+ (goto-char matching)
+ (beginning-of-line)
+ (setq message
+ (concat "Matches "
+ (buffer-substring (point)
+ (line-end-position)))))))
+ (if message
+ (message "%s" message)
+ (goto-char matching)
+ (sit-for blink-matching-delay)
+ (goto-char end-point)))))
+
+(defun fortran-blink-matching-if ()
+ "From an ENDIF or ELSE statement, blink the matching IF statement."
+ (fortran-blink-match "e\\(nd[ \t]*if\\|lse\\([ \t]*if\\)?\\)\\b"
+ "if" #'fortran-beginning-if))
+
+(defun fortran-blink-matching-do ()
+ "From an ENDDO statement, blink the matching DO or DO WHILE statement."
+ (fortran-blink-match "end[ \t]*do\\b" "do" #'fortran-beginning-do))
+
+(defun fortran-mark-do ()
+ "Put mark at end of Fortran DO [WHILE]-ENDDO construct, point at beginning.
+The marks are pushed."
+ (interactive)
+ (let (enddo-point do-point)
+ (if (setq enddo-point (fortran-end-do))
+ (if (not (setq do-point (fortran-beginning-do)))
+ (message "No matching do.")
+ (goto-char enddo-point)
+ (push-mark)
+ (goto-char do-point)))))
+
+(defun fortran-end-do ()
+ "Search forward for first unmatched ENDDO.
+Return point or nil."
+ (let ((case-fold-search t))
+ (if (save-excursion (beginning-of-line)
+ (skip-chars-forward " \t0-9")
+ (looking-at "end[ \t]*do\\b"))
+ ;; Sitting on one.
+ (match-beginning 0)
+ ;; Search for one.
+ (save-excursion
+ (let ((count 1))
+ (while (and (not (zerop count))
+ (not (eq (fortran-next-statement) 'last-statement))
+ ;; Keep local to subprogram.
+ (not (and (looking-at fortran-end-prog-re)
+ (fortran-check-end-prog-re))))
+ (skip-chars-forward " \t0-9")
+ (cond ((looking-at "end[ \t]*do\\b")
+ (setq count (1- count)))
+ ((looking-at
+ "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+[^0-9]")
+ (setq count (1+ count)))))
+ (and (zerop count)
+ ;; All pairs accounted for.
+ (point)))))))
+
+(defun fortran-beginning-do ()
+ "Search backwards for first unmatched DO [WHILE].
+Return point or nil. Ignores labelled DO loops (ie DO 10 ... 10 CONTINUE)."
+ (let ((case-fold-search t)
+ (dostart-re "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+[^0-9]"))
+ (if (save-excursion
+ (beginning-of-line)
+ (skip-chars-forward " \t0-9")
+ (looking-at dostart-re))
+ ;; Sitting on one.
+ (match-beginning 0)
+ ;; Search for one.
+ (save-excursion
+ (let ((count 1))
+ (while (and (not (zerop count))
+ (not (eq (fortran-previous-statement) 'first-statement))
+ ;; Keep local to subprogram.
+ (not (and (looking-at fortran-end-prog-re)
+ (fortran-check-end-prog-re))))
+ (skip-chars-forward " \t0-9")
+ (cond ((looking-at dostart-re)
+ (setq count (1- count)))
+ ;; Note labelled loop ends not considered.
+ ((looking-at "end[ \t]*do\\b")
+ (setq count (1+ count)))))
+ (and (zerop count)
+ ;; All pairs accounted for.
+ (point)))))))
+
+(defun fortran-mark-if ()
+ "Put mark at end of Fortran IF-ENDIF construct, point at beginning.
+The marks are pushed."
+ (interactive)
+ (let (endif-point if-point)
+ (if (setq endif-point (fortran-end-if))
+ (if (not (setq if-point (fortran-beginning-if)))
+ (message "No matching if.")
+ ;; Set mark, move point.
+ (goto-char endif-point)
+ (push-mark)
+ (goto-char if-point)))))
+
+(defun fortran-end-if ()
+ "Search forwards for first unmatched ENDIF.
+Return point or nil."
+ (let ((case-fold-search t))
+ (if (save-excursion (beginning-of-line)
+ (skip-chars-forward " \t0-9")
+ (looking-at "end[ \t]*if\\b"))
+ ;; Sitting on one.
+ (match-beginning 0)
+ ;; Search for one. The point has been already been moved to first
+ ;; letter on line but this should not cause troubles.
+ (save-excursion
+ (let ((count 1))
+ (while (and (not (zerop count))
+ (not (eq (fortran-next-statement) 'last-statement))
+ ;; Keep local to subprogram.
+ (not (and (looking-at fortran-end-prog-re)
+ (fortran-check-end-prog-re))))
+ (skip-chars-forward " \t0-9")
+ (cond ((looking-at "end[ \t]*if\\b")
+ (setq count (1- count)))
+ ((looking-at fortran-if-start-re)
+ (save-excursion
+ (if (or
+ (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
+ (let (then-test) ; multi-line if-then
+ (while
+ (and
+ (zerop (forward-line 1))
+ ;; Search forward for then.
+ (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]")
+ (not
+ (setq then-test
+ (looking-at
+ ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
+ then-test))
+ (setq count (1+ count)))))))
+ (and (zerop count)
+ ;; All pairs accounted for.
+ (point)))))))
+
+(defun fortran-beginning-if ()
+ "Search backwards for first unmatched IF-THEN.
+Return point or nil."
+ (let ((case-fold-search t))
+ (if (save-excursion
+ ;; May be sitting on multi-line if-then statement, first
+ ;; move to beginning of current statement. Note:
+ ;; `fortran-previous-statement' moves to previous statement
+ ;; *unless* current statement is first one. Only move
+ ;; forward if not first-statement.
+ (if (not (eq (fortran-previous-statement) 'first-statement))
+ (fortran-next-statement))
+ (skip-chars-forward " \t0-9")
+ (and
+ (looking-at fortran-if-start-re)
+ (save-match-data
+ (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
+ ;; Multi-line if-then.
+ (let (then-test)
+ (while
+ (and (zerop (forward-line 1))
+ ;; Search forward for then.
+ (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]")
+ (not
+ (setq then-test
+ (looking-at
+ ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
+ then-test)))))
+ ;; Sitting on one.
+ (match-beginning 0)
+ ;; Search for one.
+ (save-excursion
+ (let ((count 1))
+ (while (and (not (zerop count))
+ (not (eq (fortran-previous-statement) 'first-statement))
+ ;; Keep local to subprogram.
+ (not (and (looking-at fortran-end-prog-re)
+ (fortran-check-end-prog-re))))
+ (skip-chars-forward " \t0-9")
+ (cond ((looking-at fortran-if-start-re)
+ (save-excursion
+ (if (or
+ (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
+ (let (then-test) ; multi-line if-then
+ (while
+ (and
+ (zerop (forward-line 1))
+ ;; Search forward for then.
+ (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]")
+ (not
+ (setq then-test
+ (looking-at
+ (concat ".*then\\b[ \t]*"
+ "[^ \t(=a-z0-9]"))))))
+ then-test))
+ (setq count (1- count)))))
+ ((looking-at "end[ \t]*if\\b")
+ (setq count (1+ count)))))
+ (and (zerop count)
+ ;; All pairs accounted for.
+ (point)))))))
+
+\f
+(defun fortran-indent-line ()
+ "Indent current Fortran line based on its contents and on previous lines."
+ (interactive "*")
+ (let ((cfi (fortran-calculate-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 (fortran-find-comment-start-skip)
+ (fortran-indent-comment))))
+ ;; Never leave point in left margin.
+ (if (< (current-column) cfi)
+ (move-to-column cfi))
+ (and auto-fill-function
+ (> (save-excursion (end-of-line) (current-column))
+ fill-column)
+ (save-excursion
+ (end-of-line)
+ (fortran-fill)))
+ (when fortran-blink-matching-if
+ (fortran-blink-matching-if)
+ (fortran-blink-matching-do))))
+
+(defun fortran-auto-fill ()
+ "Function to use for `normal-auto-fill-function' in Fortran mode."
+ (if (> (current-column) (current-fill-column))
+ (let ((cfi (fortran-calculate-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 (fortran-find-comment-start-skip)
+ (fortran-indent-comment))))
+ (fortran-fill)
+ ;; Never leave point in left margin.
+ (if (< (current-column) cfi)
+ (move-to-column cfi)))))
+
+;; Historically this was a separate function which advertised itself
+;; as reindenting but only did so where `most likely to be necessary'.
+(defalias 'fortran-indent-new-line 'reindent-then-newline-and-indent)
+
+(defun fortran-indent-subprogram ()
+ "Properly indent the Fortran subprogram containing point."
+ (interactive "*")
+ (save-excursion
+ (mark-defun)
+ (message "Indenting subprogram...")
+ (indent-region (point) (mark) nil))
+ (message "Indenting subprogram...done."))
+
+(defun fortran-calculate-indent ()
+ "Calculates the Fortran indent column based on previous lines."
+ (let (icol first-statement (case-fold-search t)
+ (fortran-minimum-statement-indent
+ (if indent-tabs-mode
+ fortran-minimum-statement-indent-tab
+ fortran-minimum-statement-indent-fixed)))
+ (save-excursion
+ (setq first-statement (fortran-previous-statement))
+ (if first-statement
+ (setq icol fortran-minimum-statement-indent)
+ (if (= (point) (point-min))
+ (setq icol fortran-minimum-statement-indent)
+ (setq icol (fortran-current-line-indentation)))
+ (skip-chars-forward " \t0-9")
+ (cond ((looking-at "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?if[ \t]*(")
+ (if (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t_$(=a-z0-9]")
+ (let (then-test) ; multi-line if-then
+ (while (and (zerop (forward-line 1))
+ ;; Search forward for then.
+ (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]")
+ (not (setq then-test
+ (looking-at
+ ".*then\\b[ \t]\
+*[^ \t_$(=a-z0-9]")))))
+ then-test))
+ (setq icol (+ icol fortran-if-indent))))
+ ((looking-at "else\\(if\\)?\\b")
+ (setq icol (+ icol fortran-if-indent)))
+ ((looking-at "select[ \t]*case[ \t](.*)")
+ (setq icol (+ icol fortran-if-indent)))
+ ((looking-at "case[ \t]*(.*)")
+ (setq icol (+ icol fortran-if-indent)))
+ ((looking-at "case[ \t]*default\\b")
+ (setq icol (+ icol fortran-if-indent)))
+ ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
+ (setq icol (+ icol fortran-if-indent)))
+ ((looking-at "where[ \t]*(.*)[ \t]*\n")
+ (setq icol (+ icol fortran-if-indent)))
+ ((looking-at "do\\b")
+ (setq icol (+ icol fortran-do-indent)))
+ ((looking-at
+ "\\(structure\\|union\\|map\\|interface\\)\
+\\b[ \t]*[^ \t=(a-z]")
+ (setq icol (+ icol fortran-structure-indent)))
+ ((and (looking-at fortran-end-prog-re1)
+ (fortran-check-end-prog-re))
+ ;; Previous END resets indent to minimum.
+ (setq icol fortran-minimum-statement-indent)))))
+ (save-excursion
+ (beginning-of-line)
+ (cond ((looking-at "[ \t]*$"))
+ ;; Check for directive before comment, so as not to indent.
+ ((looking-at fortran-directive-re)
+ (setq fortran-minimum-statement-indent 0 icol 0))
+ ((looking-at fortran-comment-line-start-skip)
+ (cond ((eq fortran-comment-indent-style 'relative)
+ (setq icol (+ icol fortran-comment-line-extra-indent)))
+ ((eq fortran-comment-indent-style 'fixed)
+ (setq icol (+ fortran-minimum-statement-indent
+ fortran-comment-line-extra-indent))))
+ (setq fortran-minimum-statement-indent 0))
+ ((or (looking-at (concat "[ \t]*"
+ (regexp-quote
+ fortran-continuation-string)))
+ (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]"))
+ (skip-chars-forward " \t")
+ ;; Do not introduce extra whitespace into a broken string.
+ (setq icol
+ (if (fortran-is-in-string-p (point))
+ 6
+ (+ 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\\|select\\|where\\)\\b")
+ (setq icol (- icol fortran-if-indent)))
+ ((looking-at "else\\(if\\)?\\b")
+ (setq icol (- icol fortran-if-indent)))
+ ((looking-at "case[ \t]*\\((.*)\\|default\\>\\)")
+ (setq icol (- icol fortran-if-indent)))
+ ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\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)))
+ ((looking-at "end[ \t]*\
+\\(structure\\|union\\|map\\|interface\\)\\b[ \t]*[^ \t=(a-z]")
+ (setq icol (- icol fortran-structure-indent)))
+ ((and (looking-at fortran-end-prog-re1)
+ (fortran-check-end-prog-re)
+ (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)))
+
+\f
+(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 5/8 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 fortran-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))))
+ ((or (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]"))
+ (goto-char (match-end 0)))
+ (t
+ ;; Move past line number.
+ (skip-chars-forward "[ \t0-9]")))
+ ;; Move past whitespace.
+ (skip-chars-forward " \t")
+ (current-column)))
+
+(defun fortran-indent-to-column (col)
+ "Indent current line 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-string' 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.
+ 4) A TAB followed by a digit indicates a continuation line."
+ (save-excursion
+ (beginning-of-line)
+ (if (looking-at fortran-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))
+ (chars (string ?\s ?\t char)))
+ (goto-char (match-end 0))
+ (skip-chars-backward chars)
+ (delete-region (point) (progn (skip-chars-forward chars)
+ (point)))
+ (insert-char char (- col (current-column)))))
+ (if (looking-at "\t[1-9]")
+ (if indent-tabs-mode
+ (goto-char (match-end 0))
+ (delete-char 2)
+ (insert-char ?\s 5)
+ (insert fortran-continuation-string))
+ (if (looking-at " \\{5\\}[^ 0\n]")
+ (if indent-tabs-mode
+ (progn (delete-char 6)
+ (insert ?\t (fortran-numerical-continuation-char) 1))
+ (forward-char 6))
+ (delete-horizontal-space)
+ ;; Put line number in columns 0-4, or
+ ;; continuation character in column 5.
+ (cond ((eobp))
+ ((looking-at (regexp-quote fortran-continuation-string))
+ (if indent-tabs-mode
+ (progn
+ (indent-to
+ (if indent-tabs-mode
+ fortran-minimum-statement-indent-tab
+ fortran-minimum-statement-indent-fixed))
+ (delete-char 1)
+ (insert-char (fortran-numerical-continuation-char) 1))
+ (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.
+ (when (fortran-find-comment-start-skip)
+ (goto-char (match-beginning 0))
+ (unless (= (current-column) (fortran-comment-indent))
+ (delete-horizontal-space)
+ (indent-to (fortran-comment-indent)))))))
+
+(defun fortran-line-number-indented-correctly-p ()
+ "Return t if current line's line number is correctly indented.
+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, return t if matching DO is found.
+Otherwise return nil."
+ (let ((case-fold-search t)
+ charnum)
+ (save-excursion
+ (beginning-of-line)
+ (when (looking-at "[ \t]*[0-9]+")
+ (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)
+ (save-restriction
+ (save-excursion
+ (narrow-to-defun)
+ (and (re-search-backward
+ (concat
+ "\\(^[ \t0-9]*do[ \t]*0*"
+ charnum "\\b\\)\\|" "\\(^[ \t]*0*"
+ charnum "\\b\\)")
+ nil t)
+ (looking-at
+ (concat "^[ \t0-9]*do[ \t]*0*"
+ charnum)))))))))
+
+(defun fortran-find-comment-start-skip (&optional all)
+ "Move to past `comment-start-skip' found on current line.
+Return non-nil if `comment-start-skip' found, nil if not.
+If ALL is nil, only match comments that start in column > 0."
+ ;; Hopefully at some point we can just use the line below! -stef
+ ;; (comment-search-forward (line-end-position) t))
+ (when (or all comment-start-skip)
+ (let ((pos (point))
+ (css (if comment-start-skip
+ (concat fortran-comment-line-start-skip
+ "\\|" comment-start-skip)
+ fortran-comment-line-start-skip)))
+ (when (re-search-forward css (line-end-position) t)
+ (if (and (or all (> (match-beginning 0) (line-beginning-position)))
+ (or (save-match-data
+ (not (fortran-is-in-string-p (match-beginning 0))))
+ ;; Recurse for rest of line.
+ (fortran-find-comment-start-skip all)))
+ (point)
+ (goto-char pos)
+ nil)))))
+
+;; From: ralf@up3aud1.gwdg.de (Ralf Fassel)
+;; Test if TAB format continuation lines work.
+(defun fortran-is-in-string-p (where)
+ "Return non-nil iff WHERE (a buffer position) is inside a Fortran string."
+ (save-excursion
+ (goto-char where)
+ (cond
+ ((bolp) nil) ; bol is never inside a string
+ ((save-excursion ; comment lines too
+ (beginning-of-line)
+ (looking-at fortran-comment-line-start-skip)) nil)
+ (t (let ((parse-state '(0 nil nil nil nil nil 0))
+ (quoted-comment-start (if comment-start
+ (regexp-quote comment-start)))
+ (not-done t)
+ parse-limit end-of-line)
+ ;; Move to start of current statement.
+ (fortran-next-statement)
+ (fortran-previous-statement)
+ ;; Now parse up to WHERE.
+ (while not-done
+ (if (or ;; Skip to next line if:
+ ;; - comment line?
+ (looking-at fortran-comment-line-start-skip)
+ ;; - at end of line?
+ (eolp)
+ ;; - not in a string and after comment-start?
+ (and (not (nth 3 parse-state))
+ comment-start
+ (equal comment-start
+ (char-to-string (preceding-char)))))
+ (if (> (forward-line) 0)
+ (setq not-done nil))
+ ;; else:
+ ;; If we are at beginning of code line, skip any
+ ;; whitespace, labels and tab continuation markers.
+ (if (bolp) (skip-chars-forward " \t0-9"))
+ ;; If we are in column <= 5 now, check for continuation char.
+ (cond ((= 5 (current-column)) (forward-char 1))
+ ((and (< (current-column) 5)
+ (equal fortran-continuation-string
+ (char-to-string (following-char)))
+ (forward-char 1))))
+ ;; Find out parse-limit from here.
+ (setq end-of-line (line-end-position))
+ (setq parse-limit (min where end-of-line))
+ ;; Parse max up to comment-start, if non-nil and in current line.
+ (if comment-start
+ (save-excursion
+ (if (re-search-forward quoted-comment-start end-of-line t)
+ (setq parse-limit (min (point) parse-limit)))))
+ ;; Now parse if still in limits.
+ (if (< (point) where)
+ (setq parse-state (parse-partial-sexp
+ (point) parse-limit nil nil parse-state))
+ (setq not-done nil))))
+ ;; Result.
+ (nth 3 parse-state))))))
+
+;; From old version.
+(defalias 'fortran-auto-fill-mode 'auto-fill-mode)
+
+(defun fortran-fill ()
+ "Fill the current line at an appropriate point(s)."
+ (let* ((auto-fill-function #'fortran-auto-fill)
+ (opoint (point))
+ (bol (line-beginning-position))
+ (eol (line-end-position))
+ (bos (min eol (+ bol (fortran-current-line-indentation))))
+ ;; If in a string at fill-column, break it either before the
+ ;; initial quote, or at fill-col (if string is too long).
+ (quote
+ (save-excursion
+ (goto-char bol)
+ ;; OK to break quotes on comment lines.
+ (unless (looking-at fortran-comment-line-start-skip)
+ (let (fcpoint start)
+ (move-to-column fill-column)
+ (when (fortran-is-in-string-p (setq fcpoint (point)))
+ (save-excursion
+ (re-search-backward "\\S\"\\s\"\\S\"?" bol t)
+ (setq start
+ (if fortran-break-before-delimiters
+ (point)
+ (1+ (point)))))
+ (if (re-search-forward "\\S\"\\s\"\\S\"" eol t)
+ (backward-char 2))
+ ;; If the current string is longer than (fill-column
+ ;; - 6) chars, break it at the fill column (else
+ ;; infinite loop).
+ (if (> (- (point) start)
+ (- fill-column 6 fortran-continuation-indent))
+ fcpoint
+ start))))))
+ ;; Decide where to split the line. If a position for a quoted
+ ;; string was found above then use that, else break the line
+ ;; before/after the last delimiter.
+ (fill-point
+ (or quote
+ (save-excursion
+ ;; If f-b-b-d is t, have an extra column to play with,
+ ;; since delimiter gets shifted to new line.
+ (move-to-column (if fortran-break-before-delimiters
+ (1+ fill-column)
+ fill-column))
+ (let ((repeat t))
+ (while repeat
+ (setq repeat nil)
+ ;; Adapted from f90-find-breakpoint.
+ (re-search-backward fortran-break-delimiters-re bol)
+ (if (not fortran-break-before-delimiters)
+ (if (looking-at fortran-no-break-re)
+ ;; Deal with cases such as "**" split over
+ ;; fill-col. Simpler alternative would be
+ ;; to start from (1- fill-column) above.
+ (if (> (+ 2 (current-column)) fill-column)
+ (setq repeat t)
+ (forward-char 2))
+ (forward-char 1))
+ (backward-char)
+ (or (looking-at fortran-no-break-re)
+ (forward-char)))))
+ ;; Line indented beyond fill-column?
+ (when (<= (point) bos)
+ (move-to-column (1+ fill-column))
+ ;; What is this doing???
+ (or (re-search-forward "[\t\n,'+-/*)=]" eol t)
+ (goto-char bol)))
+ (if (bolp)
+ (re-search-forward "[ \t]" opoint t))
+ (point)))))
+ ;; If we are in an in-line comment, don't break unless the
+ ;; line of code is longer than it should be. Otherwise
+ ;; break the line at the column computed above.
+ ;;
+ ;; Need to use fortran-find-comment-start-skip to make sure that
+ ;; quoted !'s don't prevent a break.
+ (when (and (save-excursion
+ (beginning-of-line)
+ (if (not (fortran-find-comment-start-skip))
+ t
+ (goto-char (match-beginning 0))
+ (>= (point) fill-point)))
+ (save-excursion
+ (goto-char fill-point)
+ (not (bolp)))
+ (> (save-excursion
+ (goto-char opoint)
+ (current-column))
+ (min (1+ fill-column)
+ (+ (fortran-calculate-indent)
+ fortran-continuation-indent))))
+ (goto-char fill-point)
+ (fortran-break-line)
+ (end-of-line))))
+
+(defun fortran-break-line ()
+ "Call `fortran-split-line'. Joins continuation lines first, then refills."
+ (let ((opoint (point))
+ (bol (line-beginning-position))
+ (comment-string
+ (save-excursion
+ (if (fortran-find-comment-start-skip)
+ (delete-and-extract-region
+ (match-beginning 0) (line-end-position))))))
+ ;; Forward line 1 really needs to go to next non white line.
+ (if (save-excursion (forward-line)
+ (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]"))
+ (progn
+ (end-of-line)
+ (delete-region (point) (match-end 0))
+ (delete-horizontal-space)
+ (fortran-fill))
+ (fortran-split-line))
+ (if comment-string
+ (save-excursion
+ (goto-char bol)
+ (end-of-line)
+ (delete-horizontal-space)
+ (indent-to (fortran-comment-indent))
+ (insert comment-string)))))
+
+(defun fortran-analyze-file-format ()
+ "Return nil if fixed format is used, t if TAB formatting is used.
+Use `fortran-tab-mode-default' if no non-comment statements are found
+before the end or in the first `fortran-analyze-depth' lines."
+ (let ((i 0))
+ (save-excursion
+ (goto-char (point-min))
+ (while (not (or
+ (eobp)
+ (eq (char-after) ?\t)
+ (looking-at " \\{6\\}")
+ (> i fortran-analyze-depth)))
+ (forward-line)
+ (setq i (1+ i)))
+ (cond
+ ((eq (char-after) ?\t) t)
+ ((looking-at " \\{6\\}") nil)
+ (t fortran-tab-mode-default)))))
+
+(defun fortran-fill-paragraph (&optional justify)
+ "Fill surrounding comment block as paragraphs, else fill statement.
+Intended as the value of `fill-paragraph-function'.
+A comment block is filled by calling `fill-comment-paragraph' with
+argument JUSTIFY, otherwise `fortran-fill-statement' is called.
+Always returns non-nil (to prevent `fill-paragraph' being called)."
+ (interactive "*P")
+ (or (fill-comment-paragraph justify)
+ (fortran-fill-statement)
+ t))
+
+(defun fortran-fill-statement ()
+ "Fill a Fortran statement up to `fill-column'."
+ (interactive "*")
+ (let ((auto-fill-function #'fortran-auto-fill))
+ (unless (save-excursion
+ (beginning-of-line)
+ (or (looking-at "[ \t]*$")
+ (looking-at fortran-comment-line-start-skip)
+ (and comment-start-skip
+ (looking-at (concat "[ \t]*" comment-start-skip)))))
+ (save-excursion
+ ;; Find beginning of statement.
+ (fortran-next-statement)
+ (fortran-previous-statement)
+ ;; Re-indent initially.
+ (fortran-indent-line)
+ ;; Replace newline plus continuation field plus indentation with
+ ;; single space.
+ (while (progn
+ (forward-line)
+ (fortran-remove-continuation)))
+ (fortran-previous-statement)))
+ (fortran-indent-line)))
+
+(defun fortran-strip-sequence-nos (&optional do-space)
+ "Delete all text in column 72 and up (assumed to be sequence numbers).
+Normally also deletes trailing whitespace after stripping such text.
+Supplying prefix arg DO-SPACE prevents stripping the whitespace."
+ (interactive "*p")
+ (save-excursion
+ (goto-char (point-min))
+ (while (re-search-forward "^.\\{72\\}\\(.*\\)" nil t)
+ (replace-match "" nil nil nil 1)
+ (unless do-space (delete-horizontal-space)))))
+
+;; This code used to live in add-log.el, but this is a better place
+;; for it.
+(defun fortran-current-defun ()
+ "Function to use for `add-log-current-defun-function' in Fortran mode."
+ (save-excursion
+ ;; We must be inside function body for this to work.
+ (fortran-beginning-of-subprogram)
+ (let ((case-fold-search t)) ; case-insensitive
+ ;; Search for fortran subprogram start.
+ (if (re-search-forward
+ (concat "^[ \t]*\\(program\\|subroutine\\|function"
+ "\\|[ \ta-z0-9*()]*[ \t]+function\\|"
+ "\\(block[ \t]*data\\)\\)")
+ (save-excursion (fortran-end-of-subprogram)
+ (point))
+ t)
+ (or (match-string-no-properties 2)
+ (progn
+ ;; Move to EOL or before first left paren.
+ (if (re-search-forward "[(\n]" nil t)
+ (progn (backward-char)
+ (skip-chars-backward " \t"))
+ (end-of-line))
+ ;; Use the name preceding that.
+ (buffer-substring-no-properties (point) (progn (backward-sexp)
+ (point)))))
+ "main"))))
+
+(provide 'fortran)
+
+;;; arch-tag: 74935096-21c4-4cab-8ee5-6ef16090dc04
+;;; fortran.el ends here
HCoop / bpt / emacs.git / blobdiff