;;; 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 Free Software Foundation, Inc.
;; Author: Michael Kifer <kifer@cs.stonybrook.edu>
;; 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.
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; compiler pacifier
(defvar ediff-default-variant)
(defvar null-device)
+(defvar longlines-mode)
(eval-when-compile
(let ((load-path (cons (expand-file-name ".") load-path)))
(require 'ediff-init)
(defgroup ediff-diff nil
- "Diff related utilities"
+ "Diff related utilities."
:prefix "ediff-"
:group 'ediff)
;; 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)
- (zerop (apply 'call-process
- (append (list diff-util nil nil nil option) files))))
+ (eq 0 (apply 'call-process
+ (append (list diff-util nil nil nil option) files))))
(defun ediff-diff-mandatory-option (diff-util)
(let ((file (if (boundp 'null-device) null-device "/dev/null")))
:group 'ediff-diff)
(defcustom ediff-diff-options ""
- "*Options to pass to `ediff-diff-program'.
+ "*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."
;; the status can be =diff(A), =diff(B), or =diff(A+B)
(ediff-defvar-local ediff-diff-status "" "")
-
+
;;; Fine differences
(ediff-defvar-local ediff-auto-refine (if (ediff-has-face-support-p) 'on 'nix)
(ediff-defvar-local ediff-auto-refine-limit 1400
"*Auto-refine only the regions of this size \(in bytes\) or less.")
-
+
;;; General
(defvar ediff-diff-ok-lines-regexp
file-C. It may ignore file C for diff2 jobs. It should also take
one optional arguments, diff-number to refine.")
-
+
;;; Functions
;; Generate the difference vector and overlays for the two files
;; 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'"))
-
+
;; create, if it doesn't exist
(or (ediff-buffer-live-p ediff-diff-buffer)
(setq ediff-diff-buffer
(message "")
(ediff-with-current-buffer diff-buffer
(buffer-size))))))
-
-
+
+
;; If file-A/B/C is nil, do 2-way comparison with the non-nil buffers
;; This function works for diff3 and diff2 jobs
(defun ediff-setup-fine-diff-regions (file-A file-B file-C reg-num)
(setq ediff-fine-diff-buffer
(get-buffer-create
(ediff-unique-buffer-name "*ediff-fine-diff" "*"))))
-
+
(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)
ok-regexp (if diff3-job
ediff-diff3-ok-lines-regexp
ediff-diff-ok-lines-regexp))
-
+
(ediff-message-if-verbose "Refining difference region %d ..." (1+ reg-num))
(ediff-exec-process diff-program ediff-fine-diff-buffer 'synchronize
diff-options
(if diff3-job
(if file-C file-C file-B))
) ; exec process
-
+
(ediff-prepare-error-list ok-regexp ediff-fine-diff-buffer)
(ediff-message-if-verbose
"")
;; "Refining difference region %d ... done" (1+ reg-num))
-
+
(setq diff-list
(if diff3-job
(ediff-extract-diffs3
(aset elt 5 nil))
(cdr diff-list)))
))
-
+
(ediff-convert-fine-diffs-to-overlays diff-list reg-num)
))
-
-
+
+
(defun ediff-prepare-error-list (ok-regexp diff-buff)
(or (ediff-buffer-live-p ediff-error-buffer)
(setq ediff-error-buffer
(c-prev 1)
diff-list shift-A shift-B
)
-
+
;; diff list contains word numbers, unless changed later
(setq diff-list (cons (if word-mode 'words 'points)
diff-list))
shift-B
(ediff-overlay-start
(ediff-get-value-according-to-buffer-type 'B bounds))))
-
+
;; reset point in buffers A/B/C
(ediff-with-current-buffer A-buffer
(goto-char (if shift-A shift-A (point-min))))
(if (ediff-buffer-live-p C-buffer)
(ediff-with-current-buffer C-buffer
(goto-char (point-min))))
-
+
(ediff-with-current-buffer diff-buffer
(goto-char (point-min))
(while (re-search-forward ediff-match-diff-line nil t)
- (let* ((a-begin (string-to-int (buffer-substring (match-beginning 1)
- (match-end 1))))
+ (let* ((a-begin (string-to-number (buffer-substring (match-beginning 1)
+ (match-end 1))))
(a-end (let ((b (match-beginning 3))
(e (match-end 3)))
(if b
- (string-to-int (buffer-substring b e))
+ (string-to-number (buffer-substring b e))
a-begin)))
(diff-type (buffer-substring (match-beginning 4) (match-end 4)))
- (b-begin (string-to-int (buffer-substring (match-beginning 5)
- (match-end 5))))
+ (b-begin (string-to-number (buffer-substring (match-beginning 5)
+ (match-end 5))))
(b-end (let ((b (match-beginning 7))
(e (match-end 7)))
(if b
- (string-to-int (buffer-substring b e))
+ (string-to-number (buffer-substring b e))
b-begin)))
a-begin-pt a-end-pt b-begin-pt b-end-pt
c-begin c-end c-begin-pt c-end-pt)
;; (string-equal diff-type "c")
(setq a-end (1+ a-end)
b-end (1+ b-end))))
-
+
(if (eq ediff-default-variant 'default-B)
(setq c-begin b-begin
c-end b-end)
(setq c-begin a-begin
c-end a-end))
-
+
;; compute main diff vector
(if word-mode
;; make diff-list contain word numbers
c-prev c-end)
;; else convert lines to points
(ediff-with-current-buffer A-buffer
- (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))
+ (let ((longlines-mode-val
+ (if (and (boundp 'longlines-mode) longlines-mode) 1 0)))
+ ;; we must disable and then restore longlines-mode
+ (if (eq longlines-mode-val 1)
+ (longlines-mode 0))
+ (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)
+ (if (eq longlines-mode-val 1)
+ (longlines-mode longlines-mode-val))
+ ))
(ediff-with-current-buffer B-buffer
- (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))
+ (let ((longlines-mode-val
+ (if (and (boundp 'longlines-mode) longlines-mode) 1 0)))
+ (if (eq longlines-mode-val 1)
+ (longlines-mode 0))
+ (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)
+ (if (eq longlines-mode-val 1)
+ (longlines-mode longlines-mode-val))
+ ))
(if (ediff-buffer-live-p C-buffer)
(ediff-with-current-buffer C-buffer
- (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)))
+ (let ((longlines-mode-val
+ (if (and (boundp 'longlines-mode) longlines-mode) 1 0)))
+ (if (eq longlines-mode-val 1)
+ (longlines-mode 0))
+ (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)
+ (if (eq longlines-mode-val 1)
+ (longlines-mode longlines-mode-val))
+ )))
(setq diff-list
(nconc
diff-list
nil ; dummy state of ancestor
)))
)))
-
+
))) ; end ediff-with-current-buffer
diff-list
))
-
+
(defun ediff-convert-diffs-to-overlays (diff-list)
(ediff-set-diff-overlays-in-one-buffer 'A diff-list)
)))
(message "Processing difference regions ... done"))
-
+
(defun ediff-set-diff-overlays-in-one-buffer (buf-type diff-list)
(let* ((current-diff -1)
(buff (ediff-get-buffer buf-type))
+ (ctl-buf ediff-control-buffer)
;; ediff-extract-diffs puts the type of diff-list as the first elt
;; of this list. The type is either 'points or 'words
(diff-list-type (car diff-list))
(setq diff-list (cdr diff-list)) ; discard diff list type
(setq total-diffs (length diff-list))
-
+
;; shift, if necessary
(ediff-with-current-buffer buff (setq pt-saved shift))
-
+
(while diff-list
(setq current-diff (1+ current-diff)
list-element (car diff-list)
(t 7))) ; Ancestor
state-of-diff (aref list-element 8)
)
-
+
(cond ((and (not (eq buf-type state-of-diff))
(not (eq buf-type 'Ancestor))
(memq state-of-diff '(A B C)))
(setq state-of-diff (format "=diff(%S)" state-of-diff))
)
(t (setq state-of-diff nil)))
-
+
;; Put overlays at appropriate places in buffer
;; convert word numbers to points, if necessary
(if (eq diff-list-type 'words)
(progn
(ediff-with-current-buffer buff (goto-char pt-saved))
- (setq begin (ediff-goto-word (1+ begin) buff)
- end (ediff-goto-word end buff 'end))
+ (ediff-with-current-buffer ctl-buf
+ (setq begin (ediff-goto-word (1+ begin) buff)
+ end (ediff-goto-word end buff 'end)))
(if (> end limit) (setq end limit))
(if (> begin end) (setq begin end))
(setq pt-saved (ediff-with-current-buffer buff (point)))))
(setq overlay (ediff-make-bullet-proof-overlay begin end buff))
-
+
(ediff-overlay-put overlay 'priority ediff-shadow-overlay-priority)
(ediff-overlay-put overlay 'ediff-diff-num current-diff)
(if (and (ediff-has-face-support-p)
diff-list
(cdr diff-list))
) ; while
-
+
(set (ediff-get-symbol-from-alist buf-type ediff-difference-vector-alist)
(vconcat diff-overlay-list))
))
;; if `flag' is 'skip then don't compute fine diffs for this region.
(defun ediff-make-fine-diffs (&optional n flag)
(or n (setq n ediff-current-difference))
-
+
(if (< ediff-number-of-differences 1)
(error ediff-NO-DIFFERENCES))
-
+
(if ediff-word-mode
(setq flag 'skip
ediff-auto-refine 'nix))
-
+
(or (< n 0)
(>= n ediff-number-of-differences)
;; n is within the range
(whitespace-B (ediff-whitespace-diff-region-p n 'B))
(whitespace-C (ediff-whitespace-diff-region-p n 'C))
cumulative-fine-diff-length)
-
+
(cond ;; If one of the regions is empty (or 2 in 3way comparison)
;; then don't refine.
;; If the region happens to be entirely whitespace or empty then
ediff-control-buffer)
(setq file-A
(ediff-make-temp-file tmp-buffer "fineDiffA" file-A))
-
+
(ediff-wordify
(ediff-get-diff-posn 'B 'beg n)
(ediff-get-diff-posn 'B 'end n)
ediff-control-buffer)
(setq file-B
(ediff-make-temp-file tmp-buffer "fineDiffB" file-B))
-
+
(if ediff-3way-job
(progn
(ediff-wordify
(setq file-C
(ediff-make-temp-file
tmp-buffer "fineDiffC" file-C))))
-
+
;; save temp file names.
(setq ediff-temp-file-A file-A
ediff-temp-file-B file-B
ediff-temp-file-C file-C)
-
+
;; set the new vector of fine diffs, if none exists
(cond ((and ediff-3way-job whitespace-A)
(ediff-setup-fine-diff-regions nil file-B file-C n))
(ediff-setup-fine-diff-regions file-A file-B nil n))
(t
(ediff-setup-fine-diff-regions file-A file-B file-C n)))
-
+
(setq cumulative-fine-diff-length
(+ (length (ediff-get-fine-diff-vector n 'A))
(length (ediff-get-fine-diff-vector n 'B))
(if (and file-C (not ediff-merge-job))
(length (ediff-get-fine-diff-vector n 'C))
0)))
-
+
(cond ((or
;; all regions are white space
(and whitespace-A whitespace-B whitespace-C)
) ; end cond
(ediff-set-fine-diff-properties n)
)))
-
+
;; Interface to ediff-make-fine-diffs. Checks for auto-refine limit, etc.
(defun ediff-install-fine-diff-if-necessary (n)
(cond ((and (eq ediff-auto-refine 'on)
(ediff-get-diff-posn 'B 'beg n))))
(ediff-make-fine-diffs n 'noforce)
(ediff-make-fine-diffs n 'skip)))
-
+
;; highlight iff fine diffs already exist
((eq ediff-auto-refine 'off)
(ediff-make-fine-diffs n 'skip))))
-
-
+
+
;; if fine diff vector is not set for diff N, then do nothing
(defun ediff-set-fine-diff-properties (n &optional default)
(or (not (ediff-has-face-support-p))
(ediff-set-fine-diff-properties-in-one-buffer 'B n default)
(if ediff-3way-job
(ediff-set-fine-diff-properties-in-one-buffer 'C n default)))))
-
+
(defun ediff-set-fine-diff-properties-in-one-buffer (buf-type
n &optional default)
(let ((fine-diff-vector (ediff-get-fine-diff-vector n buf-type))
(ediff-set-overlay-face overl face)
(ediff-overlay-put overl 'priority priority))
fine-diff-vector)))
-
+
;; Set overlays over the regions that denote delimiters
(defun ediff-set-fine-overlays-for-combined-merge (diff-list reg-num)
(let (overlay overlay-list)
(ediff-set-fine-diff-vector
reg-num 'C (apply 'vector overlay-list))
))
-
-
+
+
;; Convert diff list to overlays for a given DIFF-REGION
;; in buffer of type BUF-TYPE
(defun ediff-set-fine-overlays-in-one-buffer (buf-type diff-list region-num)
(let* ((current-diff -1)
(reg-start (ediff-get-diff-posn buf-type 'beg region-num))
(buff (ediff-get-buffer buf-type))
+ (ctl-buf ediff-control-buffer)
combined-merge-diff-list
diff-overlay-list list-element
begin end overlay)
(ediff-clear-fine-differences-in-one-buffer region-num buf-type)
(setq diff-list (cdr diff-list)) ; discard list type (words or points)
(ediff-with-current-buffer buff (goto-char reg-start))
-
+
;; if it is a combined merge then set overlays in buff C specially
(if (and ediff-merge-job (eq buf-type 'C)
(setq combined-merge-diff-list
() ; skip this diff
;; Put overlays at appropriate places in buffers
;; convert lines to points, if necessary
- (setq begin (ediff-goto-word (1+ begin) buff)
- end (ediff-goto-word end buff 'end))
+ (ediff-with-current-buffer ctl-buf
+ (setq begin (ediff-goto-word (1+ begin) buff)
+ end (ediff-goto-word end buff 'end)))
(setq overlay (ediff-make-bullet-proof-overlay begin end buff))
;; record all overlays for this difference region
(setq diff-overlay-list (nconc diff-overlay-list (list overlay))))
-
+
(setq diff-list (cdr diff-list))
) ; while
;; convert the list of difference information into a vector
;; it is a "c" group
(if (match-beginning 2)
;; it has two numbers
- (list (string-to-int
+ (list (string-to-number
(buffer-substring (match-beginning 1) (match-end 1)))
- (1+ (string-to-int
+ (1+ (string-to-number
(buffer-substring (match-beginning 3) (match-end 3)))))
;; it has one number
- (let ((x (string-to-int
+ (let ((x (string-to-number
(buffer-substring (match-beginning 1) (match-end 1)))))
(list x (1+ x))))
;; it is an "a" group
- (let ((x (1+ (string-to-int
+ (let ((x (1+ (string-to-number
(buffer-substring (match-beginning 1) (match-end 1))))))
(list x x)))))
(anc-prev 1)
diff-list shift-A shift-B shift-C
)
-
+
;; diff list contains word numbers or points, depending on word-mode
(setq diff-list (cons (if word-mode 'words 'points)
diff-list))
(if three-way-comp
(ediff-overlay-start
(ediff-get-value-according-to-buffer-type 'C bounds)))))
-
+
;; reset point in buffers A, B, C
(ediff-with-current-buffer A-buffer
(goto-char (if shift-A shift-A (point-min))))
(if (ediff-buffer-live-p anc-buffer)
(ediff-with-current-buffer anc-buffer
(goto-char (point-min))))
-
+
(ediff-with-current-buffer diff-buffer
(goto-char (point-min))
(while (re-search-forward ediff-match-diff3-line nil t)
b-begin-pt b-end-pt
c-begin-pt c-end-pt
anc-begin-pt anc-end-pt)
-
+
(setq state-of-ancestor
(= c-or-anc-begin c-or-anc-end))
(t
(setq c-begin a-begin
c-end a-end)))
-
+
;; compute main diff vector
(if word-mode
;; make diff-list contain word numbers
c-prev c-end)
;; else convert lines to points
(ediff-with-current-buffer A-buffer
- (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))
+ (let ((longlines-mode-val
+ (if (and (boundp 'longlines-mode) longlines-mode) 1 0)))
+ ;; we must disable and then restore longlines-mode
+ (if (eq longlines-mode-val 1)
+ (longlines-mode 0))
+ (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)
+ (if (eq longlines-mode-val 1)
+ (longlines-mode longlines-mode-val))
+ ))
(ediff-with-current-buffer B-buffer
- (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))
+ (let ((longlines-mode-val
+ (if (and (boundp 'longlines-mode) longlines-mode) 1 0)))
+ (if (eq longlines-mode-val 1)
+ (longlines-mode 0))
+ (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)
+ (if (eq longlines-mode-val 1)
+ (longlines-mode longlines-mode-val))
+ ))
(ediff-with-current-buffer C-buffer
- (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))
+ (let ((longlines-mode-val
+ (if (and (boundp 'longlines-mode) longlines-mode) 1 0)))
+ (if (eq longlines-mode-val 1)
+ (longlines-mode 0))
+ (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)
+ (if (eq longlines-mode-val 1)
+ (longlines-mode longlines-mode-val))
+ ))
(if (ediff-buffer-live-p anc-buffer)
(ediff-with-current-buffer anc-buffer
- (forward-line (- c-or-anc-begin anc-prev))
- (setq anc-begin-pt (point))
- (forward-line (- c-or-anc-end c-or-anc-begin))
- (setq anc-end-pt (point)
- anc-prev c-or-anc-end)))
+ (let ((longlines-mode-val
+ (if (and (boundp 'longlines-mode) longlines-mode) 1 0)))
+ (if (eq longlines-mode-val 1)
+ (longlines-mode 0))
+ (forward-line (- c-or-anc-begin anc-prev))
+ (setq anc-begin-pt (point))
+ (forward-line (- c-or-anc-end c-or-anc-begin))
+ (setq anc-end-pt (point)
+ anc-prev c-or-anc-end)
+ (if (eq longlines-mode-val 1)
+ (longlines-mode longlines-mode-val))
+ )))
(setq diff-list
(nconc
diff-list
)))
)))
))
-
+
))) ; end ediff-with-current-buffer
diff-list
))
-
+
;; Generate the difference vector and overlays for three files
;; File-C is either the third file to compare (in case of 3-way comparison)
;; or it is the ancestor file.
(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-prepare-error-list ediff-diff3-ok-lines-regexp ediff-diff-buffer)
;;(message "Computing differences ... done")
(ediff-convert-diffs-to-overlays
ediff-diff-buffer
ediff-word-mode ediff-3way-comparison-job ediff-narrow-bounds)
))
-
+
;; Execute PROGRAM asynchronously, unless OS/2, Windows-*, or DOS, or unless
;; SYNCH is non-nil. BUFFER must be a buffer object, and must be alive. The
(set-process-filter proc 'ediff-process-filter)
)))
(store-match-data data))))
-
+
;; This is shell-command-filter from simple.el in Emacs.
;; Copied here because XEmacs doesn't have it.
(defun ediff-process-filter (proc string)
(if opoint
(goto-char opoint))
(set-buffer obuf))))
-
+
;; like shell-command-sentinel but doesn't print an exit status message
;; we do this because diff always exits with status 1, if diffs are found
;; so shell-command-sentinel displays a confusing message to the user
(set-buffer (process-buffer process))
(setq mode-line-process nil))
(delete-process process))))
-
+
;;; Word functions used to refine the current diff
(goto-char (point-min))
(skip-chars-forward ediff-whitespace)
(delete-region (point-min) (point))
-
+
(while (not (eobp))
(funcall forward-word-function)
(setq sv-point (point))
(skip-chars-forward ediff-whitespace)
(delete-region sv-point (point))
(insert "\n")))))
-
+
;; copy string specified as BEG END from IN-BUF to OUT-BUF
(defun ediff-copy-to-buffer (beg end in-buffer out-buffer)
(with-current-buffer out-buffer
(while (> n 1)
(funcall fwd-word-fun)
(skip-chars-forward ediff-whitespace)
- (setq n (1- n))))
- (if (and flag (> n 0))
- (funcall fwd-word-fun))
+ (setq n (1- n)))
+ (if (and flag (> n 0))
+ (funcall fwd-word-fun)))
(point))))
(defun ediff-same-file-contents (f1 f2)
- "Return t if F1 and F2 have identical contents."
- (let ((res
- (apply 'call-process ediff-cmp-program nil nil nil
- (append ediff-cmp-options (list f1 f2)))))
- (and (numberp res) (eq res 0))))
+ "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))))
+ )
+
+
+(defun ediff-same-contents (d1 d2 &optional filter-re)
+ "Returns t iff D1 and D2 have the same content.
+D1 and D2 can either be both directories or both regular files.
+Symlinks and the likes are not handled.
+If FILTER-RE is non-nil, recursive checking in directories
+affects only files whose names match the expression."
+ ;; Normalize empty filter RE to nil.
+ (unless (> (length filter-re) 0) (setq filter-re nil))
+ ;; Indicate progress
+ (message "Comparing '%s' and '%s' modulo '%s'" d1 d2 filter-re)
+ (cond
+ ;; D1 & D2 directories => recurse
+ ((and (file-directory-p d1)
+ (file-directory-p d2))
+ (if (null ediff-recurse-to-subdirectories)
+ (if (y-or-n-p "Compare subdirectories recursively? ")
+ (setq ediff-recurse-to-subdirectories 'yes)
+ (setq ediff-recurse-to-subdirectories 'no)))
+ (if (eq ediff-recurse-to-subdirectories 'yes)
+ (let* ((all-entries-1 (directory-files d1 t filter-re))
+ (all-entries-2 (directory-files d2 t filter-re))
+ (entries-1 (ediff-delete-all-matches "^\\.\\.?$" all-entries-1))
+ (entries-2 (ediff-delete-all-matches "^\\.\\.?$" all-entries-2))
+ )
+
+ (ediff-same-file-contents-lists entries-1 entries-2 filter-re)
+ ))
+ ) ; end of the directories case
+ ;; D1 & D2 are both files => compare directly
+ ((and (file-regular-p d1)
+ (file-regular-p d2))
+ (ediff-same-file-contents d1 d2))
+ ;; Otherwise => false: unequal contents
+ )
+ )
+
+;; If lists have the same length and names of files are pairwise equal
+;; (removing the directories) then compare contents pairwise.
+;; True if all contents are the same; false otherwise
+(defun ediff-same-file-contents-lists (entries-1 entries-2 filter-re)
+ ;; First, check only the names (works quickly and ensures a
+ ;; precondition for subsequent code)
+ (if (and (= (length entries-1) (length entries-2))
+ (equal (mapcar 'file-name-nondirectory entries-1)
+ (mapcar 'file-name-nondirectory entries-2)))
+ ;; With name equality established, compare the entries
+ ;; through recursion.
+ (let ((continue t))
+ (while (and entries-1 continue)
+ (if (ediff-same-contents
+ (car entries-1) (car entries-2) filter-re)
+ (setq entries-1 (cdr entries-1)
+ entries-2 (cdr entries-2))
+ (setq continue nil))
+ )
+ ;; if reached the end then lists are equal
+ (null entries-1))
+ )
+ )
+
+
+;; ARG1 is a regexp, ARG2 is a list of full-filenames
+;; Delete all entries that match the regexp
+(defun ediff-delete-all-matches (regex file-list-list)
+ (let (result elt)
+ (while file-list-list
+ (setq elt (car file-list-list))
+ (or (string-match regex (file-name-nondirectory elt))
+ (setq result (cons elt result)))
+ (setq file-list-list (cdr file-list-list)))
+ (reverse result)))
;;; Local Variables:
;;; eval: (put 'ediff-with-current-buffer 'edebug-form-spec '(form body))
;;; End:
-
+;;; arch-tag: a86d448e-58d7-4572-a1d9-fdedfa22f648
;;; ediff-diff.el ends here