X-Git-Url: http://git.chise.org/gitweb/?a=blobdiff_plain;f=lisp%2Fsubr.el;h=4c3977ad99fcc3bbe4c8cf6258fceaf5e6c2959c;hb=5854fb5730482af8fb33e449621f5241bd1a7d74;hp=e1a2a29499bf057927ca07004f38b21dc900e9a7;hpb=77dcef404dc78635f6ffa8f71a803d2bc7cc8921;p=chise%2Fxemacs-chise.git

diff --git a/lisp/subr.el b/lisp/subr.el
index e1a2a29..4c3977a 100644
--- a/lisp/subr.el
+++ b/lisp/subr.el
@@ -294,10 +294,14 @@ Otherwise treat \\ in NEWTEXT string as special:
 If PATTERN is omitted, it defaults to \"[ \\f\\t\\n\\r\\v]+\"."
   (or pattern
       (setq pattern "[ \f\t\n\r\v]+"))
-  ;; The FSF version of this function takes care not to cons in case
-  ;; of infloop.  Maybe we should synch?
-  (let (parts (start 0))
-    (while (string-match pattern string start)
+  (let (parts (start 0) (len (length string)))
+    (if (string-match pattern string)
+	(setq parts (cons (substring string 0 (match-beginning 0)) parts)
+	      start (match-end 0)))
+    (while (and (< start len)
+		(string-match pattern string (if (> start (match-beginning 0))
+						 start
+					       (1+ start))))
       (setq parts (cons (substring string start (match-beginning 0)) parts)
 	    start (match-end 0)))
     (nreverse (cons (substring string start) parts))))
@@ -330,7 +334,7 @@ it as a string."
        (erase-buffer))))
 
 (defmacro with-current-buffer (buffer &rest body)
-  "Execute the forms in BODY with BUFFER as the current buffer.
+  "Temporarily make BUFFER the current buffer and execute the forms in BODY.
 The value returned is the value of the last form in BODY.
 See also `with-temp-buffer'."
   `(save-current-buffer
@@ -614,6 +618,28 @@ If FUNCTION is not interactive, nil will be returned."
 	(t
 	 (error "Non-funcallable object: %s" function))))
 
+;; This function used to be an alias to `buffer-substring', except
+;; that FSF Emacs 20.4 added a BUFFER argument in an incompatible way.
+;; The new FSF's semantics makes more sense, but we try to support
+;; both for backward compatibility.
+(defun buffer-string (&optional buffer old-end old-buffer)
+  "Return the contents of the current buffer as a string.
+If narrowing is in effect, this function returns only the visible part
+of the buffer.
+
+If BUFFER is specified, the contents of that buffer are returned.
+
+The arguments OLD-END and OLD-BUFFER are supported for backward
+compatibility with pre-21.2 XEmacsen times when arguments to this
+function were (buffer-string &optional START END BUFFER)."
+  (if (or (null buffer)
+	  (bufferp buffer)
+	  (stringp buffer))
+      ;; The new way
+      (buffer-substring nil nil buffer)
+    ;; The old way
+    (buffer-substring buffer old-end old-buffer)))
+
 ;; This was not present before.  I think Jamie had some objections
 ;; to this, so I'm leaving this undefined for now. --ben
 
@@ -667,6 +693,5 @@ FILE should be the name of a library, with no directory name."
 (define-function 'remove-directory 'delete-directory)
 (define-function 'set-match-data 'store-match-data)
 (define-function 'send-string-to-terminal 'external-debugging-output)
-(define-function 'buffer-string 'buffer-substring)
 
 ;;; subr.el ends here