;;; ediff-diff.el --- diff-related utilities
-;; Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02 Free Software Foundation, Inc.
+;; Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
+;; 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
;; Author: Michael Kifer <kifer@cs.stonybrook.edu>
;;; Code:
-(provide 'ediff-diff)
;; compiler pacifier
(defvar ediff-default-variant)
;; The following functions needed for setting diff/diff3 options
;; test if diff supports the --binary option
(defsubst ediff-test-utility (diff-util option &optional files)
- (eq 0 (apply 'call-process
- (append (list diff-util nil nil nil option) files))))
+ (condition-case nil
+ (eq 0 (apply 'call-process
+ (append (list diff-util nil nil nil option) files)))
+ (error (format "Cannot execute program %S." diff-util)))
+ )
(defun ediff-diff-mandatory-option (diff-util)
(let ((file (if (boundp 'null-device) null-device "/dev/null")))
((and (string= diff-util ediff-diff-program)
(ediff-test-utility
ediff-diff-program "--binary" (list file file)))
- "--binary")
+ "--binary ")
((and (string= diff-util ediff-diff3-program)
(ediff-test-utility
ediff-diff3-program "--binary" (list file file file)))
- "--binary")
+ "--binary ")
(t ""))))
+
+;; must be before ediff-reset-diff-options to avoid compiler errors
+(fset 'ediff-set-actual-diff-options '(lambda () nil))
+
;; make sure that mandatory options are added even if the user changes
;; ediff-diff-options or ediff-diff3-options in the customization widget
(defun ediff-reset-diff-options (symb val)
(if (eq symb 'ediff-diff-options)
ediff-diff-program
ediff-diff3-program))
- (mandatory-option (ediff-diff-mandatory-option diff-program))
- (spacer (if (string-equal mandatory-option "") "" " ")))
- (set symb
- (if (string-match mandatory-option val)
- val
- (concat mandatory-option spacer val)))
+ (mandatory-option (ediff-diff-mandatory-option diff-program)))
+ (set symb (concat mandatory-option val))
+ (ediff-set-actual-diff-options)
))
(defcustom ediff-diff-options ""
"*Options to pass to `ediff-diff-program'.
-If Unix diff is used as `ediff-diff-program', then the most useful options are
-`-w', to ignore space, and `-i', to ignore case of letters.
-At present, the option `-c' is not allowed."
+If Unix diff is used as `ediff-diff-program',
+ then a useful option is `-w', to ignore space.
+Options `-c' and `-i' are not allowed. Case sensitivity can be
+ toggled interactively using \\[ediff-toggle-ignore-case]."
:set 'ediff-reset-diff-options
:type 'string
:group 'ediff-diff)
+(ediff-defvar-local ediff-ignore-case nil
+ "*If t, skip over difference regions that differ only in letter case.
+This variable can be set either in .emacs or toggled interactively.
+Use `setq-default' if setting it in .emacs")
+
+(defcustom ediff-ignore-case-option "-i"
+ "*Option that causes the diff program to ignore case of letters."
+ :type 'string
+ :group 'ediff-diff)
+
+(defcustom ediff-ignore-case-option3 ""
+ "*Option that causes the diff3 program to ignore case of letters.
+GNU diff3 doesn't have such an option."
+ :type 'string
+ :group 'ediff-diff)
+
+;; the actual options used in comparison
+(ediff-defvar-local ediff-actual-diff-options ediff-diff-options "")
+
(defcustom ediff-custom-diff-program ediff-diff-program
"*Program to use for generating custom diff output for saving it in a file.
This output is not used by Ediff internally."
:set 'ediff-reset-diff-options
:type 'string
:group 'ediff-diff)
+
+;; the actual options used in comparison
+(ediff-defvar-local ediff-actual-diff3-options ediff-diff3-options "")
+
(defcustom ediff-diff3-ok-lines-regexp
"^\\([1-3]:\\|====\\| \\|.*Warning *:\\|.*No newline\\|.*missing newline\\|^\C-m$\\)"
"*Regexp that matches normal output lines from `ediff-diff3-program'.
This variable can be set either in .emacs or toggled interactively.
Use `setq-default' if setting it in .emacs")
-(ediff-defvar-local ediff-auto-refine-limit 1400
+(ediff-defvar-local ediff-auto-refine-limit 14000
"*Auto-refine only the regions of this size \(in bytes\) or less.")
;;; General
;; ediff-setup-diff-regions-function, which can also have the value
;; ediff-setup-diff-regions3, which takes 4 arguments.
(defun ediff-setup-diff-regions (file-A file-B file-C)
- ;; looking either for '-c' or a 'c' in a set of clustered non-long options
- (if (string-match "^-c\\| -c\\|-[^- ]+c" ediff-diff-options)
- (error "Option `-c' is not allowed in `ediff-diff-options'"))
+ ;; looking for '-c', '-i', or a 'c', 'i' among clustered non-long options
+ (if (string-match "^-[ci]\\| -[ci]\\|\\(^\\| \\)-[^- ]+[ci]"
+ ediff-diff-options)
+ (error "Options `-c' and `-i' are not allowed in `ediff-diff-options'"))
;; create, if it doesn't exist
(or (ediff-buffer-live-p ediff-diff-buffer)
(ediff-exec-process ediff-diff-program
diff-buffer
'synchronize
- ediff-diff-options file1 file2)
+ ediff-actual-diff-options file1 file2)
(message "")
(ediff-with-current-buffer diff-buffer
(buffer-size))))))
(let (diff3-job diff-program diff-options ok-regexp diff-list)
(setq diff3-job ediff-3way-job
diff-program (if diff3-job ediff-diff3-program ediff-diff-program)
- diff-options (if diff3-job ediff-diff3-options ediff-diff-options)
+ diff-options (if diff3-job
+ ediff-actual-diff3-options
+ ediff-actual-diff-options)
ok-regexp (if diff3-job
ediff-diff3-ok-lines-regexp
ediff-diff-ok-lines-regexp))
(B-buffer ediff-buffer-B)
(C-buffer ediff-buffer-C)
(a-prev 1) ; this is needed to set the first diff line correctly
+ (a-prev-pt nil)
(b-prev 1)
+ (b-prev-pt nil)
(c-prev 1)
+ (c-prev-pt nil)
diff-list shift-A shift-B
)
;; we must disable and then restore longlines-mode
(if (eq longlines-mode-val 1)
(longlines-mode 0))
+ (goto-char (or a-prev-pt shift-A (point-min)))
(forward-line (- a-begin a-prev))
(setq a-begin-pt (point))
(forward-line (- a-end a-begin))
(setq a-end-pt (point)
- a-prev a-end)
+ a-prev a-end
+ a-prev-pt a-end-pt)
(if (eq longlines-mode-val 1)
(longlines-mode longlines-mode-val))
))
(if (and (boundp 'longlines-mode) longlines-mode) 1 0)))
(if (eq longlines-mode-val 1)
(longlines-mode 0))
+ (goto-char (or b-prev-pt shift-B (point-min)))
(forward-line (- b-begin b-prev))
(setq b-begin-pt (point))
(forward-line (- b-end b-begin))
(setq b-end-pt (point)
- b-prev b-end)
+ b-prev b-end
+ b-prev-pt b-end-pt)
(if (eq longlines-mode-val 1)
(longlines-mode longlines-mode-val))
))
(if (and (boundp 'longlines-mode) longlines-mode) 1 0)))
(if (eq longlines-mode-val 1)
(longlines-mode 0))
+ (goto-char (or c-prev-pt (point-min)))
(forward-line (- c-begin c-prev))
(setq c-begin-pt (point))
(forward-line (- c-end c-begin))
(setq c-end-pt (point)
- c-prev c-end)
+ c-prev c-end
+ c-prev-pt c-end-pt)
(if (eq longlines-mode-val 1)
(longlines-mode longlines-mode-val))
)))
(C-buffer ediff-buffer-C)
(anc-buffer ediff-ancestor-buffer)
(a-prev 1) ; needed to set the first diff line correctly
+ (a-prev-pt nil)
(b-prev 1)
+ (b-prev-pt nil)
(c-prev 1)
+ (c-prev-pt nil)
(anc-prev 1)
diff-list shift-A shift-B shift-C
)
;; we must disable and then restore longlines-mode
(if (eq longlines-mode-val 1)
(longlines-mode 0))
+ (goto-char (or a-prev-pt shift-A (point-min)))
(forward-line (- a-begin a-prev))
(setq a-begin-pt (point))
(forward-line (- a-end a-begin))
(setq a-end-pt (point)
- a-prev a-end)
+ a-prev a-end
+ a-prev-pt a-end-pt)
(if (eq longlines-mode-val 1)
(longlines-mode longlines-mode-val))
))
(if (and (boundp 'longlines-mode) longlines-mode) 1 0)))
(if (eq longlines-mode-val 1)
(longlines-mode 0))
+ (goto-char (or b-prev-pt shift-B (point-min)))
(forward-line (- b-begin b-prev))
(setq b-begin-pt (point))
(forward-line (- b-end b-begin))
(setq b-end-pt (point)
- b-prev b-end)
+ b-prev b-end
+ b-prev-pt b-end-pt)
(if (eq longlines-mode-val 1)
(longlines-mode longlines-mode-val))
))
(if (and (boundp 'longlines-mode) longlines-mode) 1 0)))
(if (eq longlines-mode-val 1)
(longlines-mode 0))
+ (goto-char (or c-prev-pt shift-C (point-min)))
(forward-line (- c-begin c-prev))
(setq c-begin-pt (point))
(forward-line (- c-end c-begin))
(setq c-end-pt (point)
- c-prev c-end)
+ c-prev c-end
+ c-prev-pt c-end-pt)
(if (eq longlines-mode-val 1)
(longlines-mode longlines-mode-val))
))
;; File-C is either the third file to compare (in case of 3-way comparison)
;; or it is the ancestor file.
(defun ediff-setup-diff-regions3 (file-A file-B file-C)
+ ;; looking for '-i' or a 'i' among clustered non-long options
+ (if (string-match "^-i\\| -i\\|\\(^\\| \\)-[^- ]+i" ediff-diff-options)
+ (error "Option `-i' is not allowed in `ediff-diff3-options'"))
+
(or (ediff-buffer-live-p ediff-diff-buffer)
(setq ediff-diff-buffer
(get-buffer-create (ediff-unique-buffer-name "*ediff-diff" "*"))))
(message "Computing differences ...")
(ediff-exec-process ediff-diff3-program ediff-diff-buffer 'synchronize
- ediff-diff3-options file-A file-B file-C)
+ ediff-actual-diff3-options file-A file-B file-C)
(ediff-prepare-error-list ediff-diff3-ok-lines-regexp ediff-diff-buffer)
;;(message "Computing differences ... done")
;; Similarly for Windows-*
;; In DOS, must synchronize because DOS doesn't have
;; asynchronous processes.
- (apply 'call-process program nil buffer nil args)
+ (condition-case nil
+ (apply 'call-process program nil buffer nil args)
+ (error (format "Cannot execute program %S." program)))
;; On other systems, do it asynchronously.
(setq proc (get-buffer-process buffer))
(if proc (kill-process proc))
Used for splitting difference regions into individual words.")
(make-variable-buffer-local 'ediff-forward-word-function)
-(defvar ediff-whitespace " \n\t\f"
+;; \240 is unicode symbol for nonbreakable whitespace
+(defvar ediff-whitespace " \n\t\f\r\240"
"*Characters constituting white space.
These characters are ignored when differing regions are split into words.")
(make-variable-buffer-local 'ediff-whitespace)
"Return t if files F1 and F2 have identical contents."
(if (and (not (file-directory-p f1))
(not (file-directory-p f2)))
- (let ((res
- (apply 'call-process ediff-cmp-program nil nil nil
- (append ediff-cmp-options (list f1 f2)))))
- (and (numberp res) (eq res 0))))
- )
+ (condition-case nil
+ (let ((res
+ (apply 'call-process ediff-cmp-program nil nil nil
+ (append ediff-cmp-options (list f1 f2)))))
+ (and (numberp res) (eq res 0)))
+ (error (format "Cannot execute program %S." ediff-cmp-program)))
+ ))
(defun ediff-same-contents (d1 d2 &optional filter-re)
(reverse result)))
+(defun ediff-set-actual-diff-options ()
+ (if ediff-ignore-case
+ (setq ediff-actual-diff-options
+ (concat ediff-diff-options " " ediff-ignore-case-option)
+ ediff-actual-diff3-options
+ (concat ediff-diff3-options " " ediff-ignore-case-option3))
+ (setq ediff-actual-diff-options ediff-diff-options
+ ediff-actual-diff3-options ediff-diff3-options)
+ )
+ (setq-default ediff-actual-diff-options ediff-actual-diff-options
+ ediff-actual-diff3-options ediff-actual-diff3-options)
+ )
+
+
+;; Ignore case handling - some ideas from drew.adams@@oracle.com
+(defun ediff-toggle-ignore-case ()
+ (interactive)
+ (ediff-barf-if-not-control-buffer)
+ (setq ediff-ignore-case (not ediff-ignore-case))
+ (ediff-set-actual-diff-options)
+ (if ediff-ignore-case
+ (message "Ignoring regions that differ only in case")
+ (message "Ignoring case differences turned OFF"))
+ (cond (ediff-merge-job
+ (message "Ignoring letter case is too dangerous in merge jobs"))
+ ((and ediff-diff3-job (string= ediff-ignore-case-option3 ""))
+ (message "Ignoring letter case is not supported by this diff3 program"))
+ ((and (not ediff-3way-job) (string= ediff-ignore-case-option ""))
+ (message "Ignoring letter case is not supported by this diff program"))
+ (t
+ (sit-for 1)
+ (ediff-update-diffs)))
+ )
+
+
+(provide 'ediff-diff)
+
+
;;; Local Variables:
;;; eval: (put 'ediff-defvar-local 'lisp-indent-hook 'defun)
;;; eval: (put 'ediff-with-current-buffer 'lisp-indent-hook 1)