[bpt/emacs.git] / lisp / add-log.el

;;; add-log.el --- change log maintenance commands for Emacs

;; Copyright (C) 1985, 1986, 1988, 1993 Free Software Foundation, Inc.

;; 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, 675 Mass Ave, Cambridge, MA 02139, USA.

;;; Code:

;;;###autoload
(defvar change-log-default-name nil
  "*Name of a change log file for \\[add-change-log-entry].")

(defun change-log-name ()
  (or change-log-default-name
      (if (eq system-type 'vax-vms) "$CHANGE_LOG$.TXT" "ChangeLog")))

(defun prompt-for-change-log-name ()
  "Prompt for a change log name."
  (let ((default (change-log-name)))
    (expand-file-name
     (read-file-name (format "Log file (default %s): " default)
		     nil default))))

;;;###autoload
(defun add-change-log-entry (&optional whoami file-name other-window)
  "Find change log file and add an entry for today.
Optional arg (interactive prefix) non-nil means prompt for user name and site.
Second arg is file name of change log.  If nil, uses `change-log-default-name'.
Third arg OTHER-WINDOW non-nil means visit in other window."
  (interactive (list current-prefix-arg
		     (prompt-for-change-log-name)))
  (let* ((full-name (if whoami
			(read-input "Full name: " (user-full-name))
		      (user-full-name)))
	 ;; Note that some sites have room and phone number fields in
	 ;; full name which look silly when inserted.  Rather than do
	 ;; anything about that here, let user give prefix argument so that
	 ;; s/he can edit the full name field in prompter if s/he wants.
	 (login-name (if whoami
			 (read-input "Login name: " (user-login-name))
		       (user-login-name)))
	 (site-name (if whoami
			(read-input "Site name: " (system-name))
		      (system-name)))
	 (defun (add-log-current-defun))
	 paragraph-end entry)
    (or file-name
	(setq file-name (or change-log-default-name
			    default-directory)))
    (setq file-name (if (file-directory-p file-name)
			(expand-file-name (change-log-name) file-name)
		      (expand-file-name file-name)))
    ;; Chase links before visiting the file.
    ;; This makes it easier to use a single change log file
    ;; for several related directories.
    (setq file-name
	  (expand-file-name (or (file-symlink-p file-name) file-name)))
    ;; Move up in the dir hierarchy till we find a change log file.
    (let ((file1 file-name)
	  parent-dir)
      (while (and (not (file-exists-p file1))
		  (progn (setq parent-dir
			       (file-name-directory
				(directory-file-name
				 (file-name-directory file1))))
			 ;; Give up if we are already at the root dir.
			 (not (string= (file-name-directory file1) parent-dir))))
	;; Move up to the parent dir and try again.
	(setq file1 (expand-file-name (change-log-name) parent-dir)))
      ;; If we found a change log in a parent, use that.
      (if (file-exists-p file1)
	  (setq file-name file1)))

    (set (make-local-variable 'change-log-default-name) file-name)

    ;; Set ENTRY to the file name to use in the new entry.
    (and buffer-file-name
	 ;; Never want to add a change log entry for the ChangeLog file itself.
	 (not (string= buffer-file-name file-name))
	 (setq entry (if (string-match
			  (concat "^" (regexp-quote (file-name-directory
						     file-name)))
			  buffer-file-name)
			 (substring buffer-file-name (match-end 0))
		       (file-name-nondirectory buffer-file-name))))

    (if (and other-window (not (equal file-name buffer-file-name)))
	(find-file-other-window file-name)
      (find-file file-name))
    (undo-boundary)
    (goto-char (point-min))
    (if (looking-at (concat (regexp-quote (substring (current-time-string)
						     0 10))
			    ".* " (regexp-quote full-name)
			    "  (" (regexp-quote login-name) "@"))
	(forward-line 1)
      (insert (current-time-string)
	      "  " full-name
	      "  (" login-name "@" site-name ")\n\n"))

    ;; Search only within the first paragraph.
    (forward-paragraph 1)
    (setq paragraph-end (point))
    (goto-char (point-min))

    ;; Now insert the new line for this entry.
    (cond ((re-search-forward "^\\s *\\*\\s *$" paragraph-end t)
	   ;; Put this file name into the existing empty entry.
	   (if entry
	       (insert entry)))
	  ((and (re-search-forward
		 (concat (regexp-quote (concat "* " entry))
			 ;; Don't accept `foo.bar' when
			 ;; looking for `foo':
			 "\\(\\s \\|[(),:]\\)")
		 paragraph-end t))
	   ;; Add to the existing entry for the same file.
	   (re-search-forward "^\\s *$\\|^\\s \\*")
	   (beginning-of-line)
	   (while (and (not (eobp)) (looking-at "^\\s *$"))
	     (delete-region (point) (save-excursion (forward-line 1) (point))))
	   (insert "\n\n")
	   (forward-line -2)
	   (indent-relative-maybe))
	  (t
	   ;; Make a new entry.
	   (forward-line 1)
	   (while (looking-at "\\sW")
	     (forward-line 1))
	   (while (and (not (eobp)) (looking-at "^\\s *$"))
	     (delete-region (point) (save-excursion (forward-line 1) (point))))
	   (insert "\n\n\n")
	   (forward-line -2)
	   (indent-to left-margin)
	   (insert "* " (or entry ""))))
    ;; Now insert the function name, if we have one.
    ;; Point is at the entry for this file,
    ;; either at the end of the line or at the first blank line.
    (if defun
	(progn
	  ;; Make it easy to get rid of the function name.
	  (undo-boundary)
	  (insert (if (save-excursion
			(beginning-of-line 1)
			(looking-at "\\s *$")) 
		      ""
		    " ")
		  "(" defun "): "))
      ;; No function name, so put in a colon unless we have just a star.
      (if (not (save-excursion
		 (beginning-of-line 1)
		 (looking-at "\\s *\\(\\*\\s *\\)?$")))
	  (insert ": ")))))

;;;###autoload
(defun add-change-log-entry-other-window (&optional whoami file-name)
  "Find change log file in other window and add an entry for today.
First arg (interactive prefix) non-nil means prompt for user name and site.
Second arg is file name of change log.
Interactively, with a prefix argument, the file name is prompted for."
  (interactive (if current-prefix-arg
		   (list current-prefix-arg
			 (prompt-for-change-log-name))))
  (add-change-log-entry whoami file-name t))
;;;###autoload (define-key ctl-x-4-map "a" 'add-change-log-entry-other-window)

;;;###autoload
(defun change-log-mode ()
  "Major mode for editting change logs; like Indented Text Mode.
Prevents numeric backups and sets `left-margin' to 8 and `fill-column' to 74.
New log entries are usually made with \\[add-change-log-entry] or \\[add-change-log-entry-other-window].
Each entry behaves as a paragraph, and the entries for one day as a page.
Runs `change-log-mode-hook'."
  (interactive)
  (kill-all-local-variables)
  (indented-text-mode)
  (setq major-mode 'change-log-mode
	mode-name "Change Log"
	left-margin 8
	fill-column 74)
  ;; Let each entry behave as one paragraph:
  (set (make-local-variable 'paragraph-start) "^\\s *$\\|^^L")
  (set (make-local-variable 'paragraph-separate) "^\\s *$\\|^^L\\|^\\sw")
  ;; Let all entries for one day behave as one page.
  ;; Match null string on the date-line so that the date-line
  ;; is grouped with what follows.
  (set (make-local-variable 'page-delimiter) "^\\<\\|^\f")
  (set (make-local-variable 'version-control) 'never)
  (set (make-local-variable 'adaptive-fill-regexp) "\\s *")
  (run-hooks 'change-log-mode-hook))

(defvar add-log-current-defun-header-regexp
  "^\\([A-Z][A-Z_ ]*[A-Z_]\\|[a-z_---A-Z]+\\)[ \t]*[:=]"
  "*Heuristic regexp used by `add-log-current-defun' for unknown major modes.")

(defun add-log-current-defun ()
  "Return name of function definition point is in, or nil.

Understands Lisp, LaTeX (\"functions\" are chapters, sections, ...),
Texinfo (@node titles), and C.

Other modes are handled by a heuristic that looks in the 10K before
point for uppercase headings starting in the first column or
identifiers followed by `:' or `=', see variable
`add-log-current-defun-header-regexp'.

Has a preference of looking backwards."
  (condition-case nil
      (save-excursion
	(let ((location (point)))
	  (cond ((memq major-mode '(emacs-lisp-mode lisp-mode scheme-mode))
		 ;; If we are now precisely a the beginning of a defun,
		 ;; make sure beginning-of-defun finds that one
		 ;; rather than the previous one.
		 (or (eobp) (forward-char 1))
		 (beginning-of-defun)
		 ;; Make sure we are really inside the defun found, not after it.
		 (if (and (progn (end-of-defun)
				 (< location (point)))
			  (progn (forward-sexp -1)
				 (>= location (point))))
		     (progn
		       (forward-word 1)
		       (skip-chars-forward " ")
		       (buffer-substring (point)
					 (progn (forward-sexp 1) (point))))))
		((and (memq major-mode '(c-mode 'c++-mode))
		      (save-excursion (beginning-of-line)
				      ;; Use eq instead of = here to avoid
				      ;; error when at bob and char-after
				      ;; returns nil.
				      (while (eq (char-after (- (point) 2)) ?\\)
					(forward-line -1))
				      (looking-at "[ \t]*#[ \t]*define[ \t]")))
		 ;; Handle a C macro definition.
		 (beginning-of-line)
		 (while (eq (char-after (- (point) 2)) ?\\) ;not =; note above
		   (forward-line -1))
		 (search-forward "define")
		 (skip-chars-forward " \t")
		 (buffer-substring (point)
				   (progn (forward-sexp 1) (point))))
		((memq major-mode '(c-mode 'c++-mode))
		 (beginning-of-line)
		 ;; See if we are in the beginning part of a function,
		 ;; before the open brace.  If so, advance forward.
		 (while (not (looking-at "{\\|\\(\\s *$\\)"))
		   (forward-line 1))
		 (or (eobp)
		     (forward-char 1))
		 (beginning-of-defun)
		 (if (progn (end-of-defun)
			    (< location (point)))
		     (progn
		       (backward-sexp 1)
		       (let (beg tem)

			 (forward-line -1)
			 ;; Skip back over typedefs of arglist.
			 (while (and (not (bobp))
				     (looking-at "[ \t\n]"))
			   (forward-line -1))
			 ;; See if this is using the DEFUN macro used in Emacs,
			 ;; or the DEFUN macro used by the C library.
			 (if (condition-case nil
				 (and (save-excursion
					(forward-line 1)
					(backward-sexp 1)
					(beginning-of-line)
					(setq tem (point))
					(looking-at "DEFUN\\b"))
				      (>= location tem))
			       (error nil))
			     (progn
			       (goto-char tem)
			       (down-list 1)
			       (if (= (char-after (point)) ?\")
				   (progn
				     (forward-sexp 1)
				     (skip-chars-forward " ,")))
			       (buffer-substring (point)
						 (progn (forward-sexp 1) (point))))
			   ;; Ordinary C function syntax.
			   (setq beg (point))
			   (if (condition-case nil
				   ;; Protect against "Unbalanced parens" error.
				   (progn
				     (down-list 1) ; into arglist
				     (backward-up-list 1)
				     (skip-chars-backward " \t")
				     t)
				 (error nil))
			       ;; Verify initial pos was after
			       ;; real start of function.
			       (if (and (save-excursion
					  (goto-char beg)
					  ;; For this purpose, include the line
					  ;; that has the decl keywords.  This
					  ;; may also include some of the
					  ;; comments before the function.
					  (while (and (not (bobp))
						      (save-excursion
							(forward-line -1)
							(looking-at "[^\n\f]")))
					    (forward-line -1))
					  (>= location (point)))
					;; Consistency check: going down and up
					;; shouldn't take us back before BEG.
					(> (point) beg))
				   (buffer-substring (point)
						     (progn (backward-sexp 1)
							    (point))))))))))
		((memq major-mode
		       '(TeX-mode plain-TeX-mode LaTeX-mode;; tex-mode.el
				  plain-tex-mode latex-mode;; cmutex.el
				  ))
		 (if (re-search-backward
		      "\\\\\\(sub\\)*\\(section\\|paragraph\\|chapter\\)" nil t)
		     (progn
		       (goto-char (match-beginning 0))
		       (buffer-substring (1+ (point));; without initial backslash
					 (progn
					   (end-of-line)
					   (point))))))
		((eq major-mode 'texinfo-mode)
		 (if (re-search-backward "^@node[ \t]+\\([^,]+\\)," nil t)
		     (buffer-substring (match-beginning 1)
				       (match-end 1))))
		(t
		 ;; If all else fails, try heuristics
		 (let (case-fold-search)
		   (end-of-line)
		   (if (re-search-backward add-log-current-defun-header-regexp
					   (- (point) 10000)
					   t)
		       (buffer-substring (match-beginning 1)
					 (match-end 1))))))))
    (error nil)))


(provide 'add-log)

;;; add-log.el ends here
Commit	Line	Data
84fc2cfa ER	1	;;; add-log.el --- change log maintenance commands for Emacs
84fc2cfa ER	2
ec367ad6	3	;; Copyright (C) 1985, 1986, 1988, 1993 Free Software Foundation, Inc.
84fc2cfa ER	4
	5	;; This file is part of GNU Emacs.
	6
	7	;; GNU Emacs is free software; you can redistribute it and/or modify
	8	;; it under the terms of the GNU General Public License as published by
fd7fa35a	9	;; the Free Software Foundation; either version 2, or (at your option)
84fc2cfa ER	10	;; any later version.
	11
	12	;; GNU Emacs is distributed in the hope that it will be useful,
	13	;; but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	;; GNU General Public License for more details.
	16
	17	;; You should have received a copy of the GNU General Public License
	18	;; along with GNU Emacs; see the file COPYING. If not, write to
	19	;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
	20
fd7fa35a	21	;;; Code:
84fc2cfa ER	22
	23	;;;###autoload
	24	(defvar change-log-default-name nil
	25	"*Name of a change log file for \\[add-change-log-entry].")
	26
	27	(defun change-log-name ()
	28	(or change-log-default-name
	29	(if (eq system-type 'vax-vms) "$CHANGE_LOG$.TXT" "ChangeLog")))
	30
	31	(defun prompt-for-change-log-name ()
	32	"Prompt for a change log name."
	33	(let ((default (change-log-name)))
	34	(expand-file-name
	35	(read-file-name (format "Log file (default %s): " default)
	36	nil default))))
	37
	38	;;;###autoload
	39	(defun add-change-log-entry (&optional whoami file-name other-window)
	40	"Find change log file and add an entry for today.
	41	Optional arg (interactive prefix) non-nil means prompt for user name and site.
	42	Second arg is file name of change log. If nil, uses `change-log-default-name'.
	43	Third arg OTHER-WINDOW non-nil means visit in other window."
	44	(interactive (list current-prefix-arg
	45	(prompt-for-change-log-name)))
dd309224	46	(let* ((full-name (if whoami
84fc2cfa ER	47	(read-input "Full name: " (user-full-name))
	48	(user-full-name)))
	49	;; Note that some sites have room and phone number fields in
	50	;; full name which look silly when inserted. Rather than do
	51	;; anything about that here, let user give prefix argument so that
	52	;; s/he can edit the full name field in prompter if s/he wants.
	53	(login-name (if whoami
	54	(read-input "Login name: " (user-login-name))
	55	(user-login-name)))
	56	(site-name (if whoami
	57	(read-input "Site name: " (system-name))
21d7e080 ER	58	(system-name)))
21d7e080 ER	59	(defun (add-log-current-defun))
82f4acaf	60	paragraph-end entry)
84fc2cfa ER	61	(or file-name
	62	(setq file-name (or change-log-default-name
	63	default-directory)))
dd309224 RM	64	(setq file-name (if (file-directory-p file-name)
	65	(expand-file-name (change-log-name) file-name)
	66	(expand-file-name file-name)))
09b389d0 RS	67	;; Chase links before visiting the file.
	68	;; This makes it easier to use a single change log file
	69	;; for several related directories.
e12d0df7 RS	70	(setq file-name
e12d0df7 RS	71	(expand-file-name (or (file-symlink-p file-name) file-name)))
6d7ee041 RS	72	;; Move up in the dir hierarchy till we find a change log file.
	73	(let ((file1 file-name)
	74	parent-dir)
	75	(while (and (not (file-exists-p file1))
	76	(progn (setq parent-dir
	77	(file-name-directory
	78	(directory-file-name
	79	(file-name-directory file1))))
	80	;; Give up if we are already at the root dir.
	81	(not (string= (file-name-directory file1) parent-dir))))
	82	;; Move up to the parent dir and try again.
	83	(setq file1 (expand-file-name (change-log-name) parent-dir)))
	84	;; If we found a change log in a parent, use that.
	85	(if (file-exists-p file1)
	86	(setq file-name file1)))
	87
84fc2cfa	88	(set (make-local-variable 'change-log-default-name) file-name)
82f4acaf RM	89
	90	;; Set ENTRY to the file name to use in the new entry.
	91	(and buffer-file-name
	92	;; Never want to add a change log entry for the ChangeLog file itself.
	93	(not (string= buffer-file-name file-name))
	94	(setq entry (if (string-match
	95	(concat "^" (regexp-quote (file-name-directory
	96	file-name)))
	97	buffer-file-name)
	98	(substring buffer-file-name (match-end 0))
	99	(file-name-nondirectory buffer-file-name))))
	100
84fc2cfa ER	101	(if (and other-window (not (equal file-name buffer-file-name)))
	102	(find-file-other-window file-name)
	103	(find-file file-name))
	104	(undo-boundary)
	105	(goto-char (point-min))
ec367ad6	106	(if (looking-at (concat (regexp-quote (substring (current-time-string)
82f4acaf RM	107	0 10))
	108	".* " (regexp-quote full-name)
	109	" (" (regexp-quote login-name) "@"))
ec367ad6 RS	110	(forward-line 1)
	111	(insert (current-time-string)
	112	" " full-name
	113	" (" login-name "@" site-name ")\n\n"))
82f4acaf	114
74046d00	115	;; Search only within the first paragraph.
82f4acaf RM	116	(forward-paragraph 1)
82f4acaf RM	117	(setq paragraph-end (point))
84fc2cfa	118	(goto-char (point-min))
82f4acaf	119
1832dbd1	120	;; Now insert the new line for this entry.
82f4acaf RM	121	(cond ((re-search-forward "^\\s \\\\s *$" paragraph-end t)
	122	;; Put this file name into the existing empty entry.
	123	(if entry
	124	(insert entry)))
	125	((and (re-search-forward
	126	(concat (regexp-quote (concat "* " entry))
	127	;; Don't accept `foo.bar' when
	128	;; looking for `foo':
	129	"\\(\\s \\\|[(),:]\\)")
	130	paragraph-end t))
	131	;; Add to the existing entry for the same file.
	132	(re-search-forward "^\\s $\\\|^\\s \\")
1832dbd1	133	(beginning-of-line)
09b389d0	134	(while (and (not (eobp)) (looking-at "^\\s *$"))
1832dbd1 RS	135	(delete-region (point) (save-excursion (forward-line 1) (point))))
	136	(insert "\n\n")
	137	(forward-line -2)
dd309224	138	(indent-relative-maybe))
21d7e080	139	(t
dd309224 RM	140	;; Make a new entry.
	141	(forward-line 1)
	142	(while (looking-at "\\sW")
	143	(forward-line 1))
09b389d0	144	(while (and (not (eobp)) (looking-at "^\\s *$"))
1832dbd1 RS	145	(delete-region (point) (save-excursion (forward-line 1) (point))))
	146	(insert "\n\n\n")
	147	(forward-line -2)
dd309224 RM	148	(indent-to left-margin)
dd309224 RM	149	(insert "* " (or entry ""))))
1832dbd1	150	;; Now insert the function name, if we have one.
21d7e080 ER	151	;; Point is at the entry for this file,
	152	;; either at the end of the line or at the first blank line.
	153	(if defun
	154	(progn
dd309224	155	;; Make it easy to get rid of the function name.
21d7e080	156	(undo-boundary)
dd309224 RM	157	(insert (if (save-excursion
	158	(beginning-of-line 1)
	159	(looking-at "\\s *$"))
	160	""
	161	" ")
	162	"(" defun "): "))
1832dbd1	163	;; No function name, so put in a colon unless we have just a star.
dd309224 RM	164	(if (not (save-excursion
	165	(beginning-of-line 1)
	166	(looking-at "\\s \\(\\\\s *\\)?$")))
1832dbd1	167	(insert ": ")))))
84fc2cfa	168
84fc2cfa ER	169	;;;###autoload
	170	(defun add-change-log-entry-other-window (&optional whoami file-name)
	171	"Find change log file in other window and add an entry for today.
	172	First arg (interactive prefix) non-nil means prompt for user name and site.
	173	Second arg is file name of change log.
	174	Interactively, with a prefix argument, the file name is prompted for."
	175	(interactive (if current-prefix-arg
	176	(list current-prefix-arg
	177	(prompt-for-change-log-name))))
	178	(add-change-log-entry whoami file-name t))
82f4acaf	179	;;;###autoload (define-key ctl-x-4-map "a" 'add-change-log-entry-other-window)
84fc2cfa	180
1da56800	181	;;;###autoload
21d7e080	182	(defun change-log-mode ()
dd309224	183	"Major mode for editting change logs; like Indented Text Mode.
09b389d0	184	Prevents numeric backups and sets `left-margin' to 8 and `fill-column' to 74.
5516387c RM	185	New log entries are usually made with \\[add-change-log-entry] or \\[add-change-log-entry-other-window].
	186	Each entry behaves as a paragraph, and the entries for one day as a page.
	187	Runs `change-log-mode-hook'."
21d7e080 ER	188	(interactive)
	189	(kill-all-local-variables)
	190	(indented-text-mode)
82f4acaf RM	191	(setq major-mode 'change-log-mode
	192	mode-name "Change Log"
	193	left-margin 8
	194	fill-column 74)
21d7e080	195	;; Let each entry behave as one paragraph:
dd309224 RM	196	(set (make-local-variable 'paragraph-start) "^\\s *$\\\|^^L")
dd309224 RM	197	(set (make-local-variable 'paragraph-separate) "^\\s *$\\\|^^L\\\|^\\sw")
21d7e080	198	;; Let all entries for one day behave as one page.
2c91c85c RS	199	;; Match null string on the date-line so that the date-line
	200	;; is grouped with what follows.
	201	(set (make-local-variable 'page-delimiter) "^\\<\\\|^\f")
dd309224 RM	202	(set (make-local-variable 'version-control) 'never)
dd309224 RM	203	(set (make-local-variable 'adaptive-fill-regexp) "\\s *")
21d7e080 ER	204	(run-hooks 'change-log-mode-hook))
	205
	206	(defvar add-log-current-defun-header-regexp
d80788d8	207	"^\\([A-Z][A-Z_ ][A-Z_]\\\|[a-z_---A-Z]+\\)[ \t][:=]"
21d7e080 ER	208	"*Heuristic regexp used by `add-log-current-defun' for unknown major modes.")
	209
	210	(defun add-log-current-defun ()
	211	"Return name of function definition point is in, or nil.
	212
	213	Understands Lisp, LaTeX (\"functions\" are chapters, sections, ...),
	214	Texinfo (@node titles), and C.
	215
	216	Other modes are handled by a heuristic that looks in the 10K before
	217	point for uppercase headings starting in the first column or
	218	identifiers followed by `:' or `=', see variable
	219	`add-log-current-defun-header-regexp'.
	220
	221	Has a preference of looking backwards."
2cc0b765 RS	222	(condition-case nil
	223	(save-excursion
	224	(let ((location (point)))
	225	(cond ((memq major-mode '(emacs-lisp-mode lisp-mode scheme-mode))
	226	;; If we are now precisely a the beginning of a defun,
	227	;; make sure beginning-of-defun finds that one
	228	;; rather than the previous one.
	229	(or (eobp) (forward-char 1))
	230	(beginning-of-defun)
	231	;; Make sure we are really inside the defun found, not after it.
	232	(if (and (progn (end-of-defun)
	233	(< location (point)))
	234	(progn (forward-sexp -1)
	235	(>= location (point))))
	236	(progn
	237	(forward-word 1)
	238	(skip-chars-forward " ")
	239	(buffer-substring (point)
	240	(progn (forward-sexp 1) (point))))))
	241	((and (memq major-mode '(c-mode 'c++-mode))
	242	(save-excursion (beginning-of-line)
	243	;; Use eq instead of = here to avoid
	244	;; error when at bob and char-after
	245	;; returns nil.
	246	(while (eq (char-after (- (point) 2)) ?\\)
36e6631c	247	(forward-line -1))
2cc0b765 RS	248	(looking-at "[ \t]#[ \t]define[ \t]")))
	249	;; Handle a C macro definition.
	250	(beginning-of-line)
	251	(while (eq (char-after (- (point) 2)) ?\\) ;not =; note above
	252	(forward-line -1))
	253	(search-forward "define")
	254	(skip-chars-forward " \t")
	255	(buffer-substring (point)
	256	(progn (forward-sexp 1) (point))))
	257	((memq major-mode '(c-mode 'c++-mode))
	258	(beginning-of-line)
	259	;; See if we are in the beginning part of a function,
	260	;; before the open brace. If so, advance forward.
	261	(while (not (looking-at "{\\\|\\(\\s *$\\)"))
	262	(forward-line 1))
	263	(or (eobp)
	264	(forward-char 1))
	265	(beginning-of-defun)
	266	(if (progn (end-of-defun)
	267	(< location (point)))
	268	(progn
	269	(backward-sexp 1)
	270	(let (beg tem)
fd7fa35a	271
2cc0b765 RS	272	(forward-line -1)
	273	;; Skip back over typedefs of arglist.
	274	(while (and (not (bobp))
	275	(looking-at "[ \t\n]"))
	276	(forward-line -1))
	277	;; See if this is using the DEFUN macro used in Emacs,
	278	;; or the DEFUN macro used by the C library.
	279	(if (condition-case nil
	280	(and (save-excursion
	281	(forward-line 1)
	282	(backward-sexp 1)
	283	(beginning-of-line)
	284	(setq tem (point))
	285	(looking-at "DEFUN\\b"))
	286	(>= location tem))
	287	(error nil))
	288	(progn
	289	(goto-char tem)
	290	(down-list 1)
	291	(if (= (char-after (point)) ?\")
	292	(progn
	293	(forward-sexp 1)
	294	(skip-chars-forward " ,")))
	295	(buffer-substring (point)
	296	(progn (forward-sexp 1) (point))))
	297	;; Ordinary C function syntax.
	298	(setq beg (point))
	299	(if (condition-case nil
	300	;; Protect against "Unbalanced parens" error.
	301	(progn
	302	(down-list 1) ; into arglist
	303	(backward-up-list 1)
	304	(skip-chars-backward " \t")
	305	t)
	306	(error nil))
	307	;; Verify initial pos was after
	308	;; real start of function.
	309	(if (and (save-excursion
	310	(goto-char beg)
	311	;; For this purpose, include the line
	312	;; that has the decl keywords. This
	313	;; may also include some of the
	314	;; comments before the function.
	315	(while (and (not (bobp))
	316	(save-excursion
	317	(forward-line -1)
	318	(looking-at "[^\n\f]")))
	319	(forward-line -1))
	320	(>= location (point)))
	321	;; Consistency check: going down and up
	322	;; shouldn't take us back before BEG.
	323	(> (point) beg))
	324	(buffer-substring (point)
	325	(progn (backward-sexp 1)
	326	(point))))))))))
	327	((memq major-mode
	328	'(TeX-mode plain-TeX-mode LaTeX-mode;; tex-mode.el
	329	plain-tex-mode latex-mode;; cmutex.el
	330	))
	331	(if (re-search-backward
	332	"\\\\\\(sub\\)*\\(section\\\|paragraph\\\|chapter\\)" nil t)
	333	(progn
	334	(goto-char (match-beginning 0))
	335	(buffer-substring (1+ (point));; without initial backslash
336	(progn
337	(end-of-line)
338	(point))))))
339	((eq major-mode 'texinfo-mode)
340	(if (re-search-backward "^@node[ \t]+\\([^,]+\\)," nil t)
341	(buffer-substring (match-beginning 1)
342	(match-end 1))))
343	(t
344	;; If all else fails, try heuristics
345	(let (case-fold-search)
346	(end-of-line)
347	(if (re-search-backward add-log-current-defun-header-regexp
348	(- (point) 10000)
349	t)
350	(buffer-substring (match-beginning 1)
351	(match-end 1))))))))
352	(error nil)))
ef15f270 JB	353
ef15f270 JB	354
1da56800 RS	355	(provide 'add-log)
1da56800 RS	356
fd7fa35a	357	;;; add-log.el ends here