Fix regexp match issue when exporting large source code snippets

lisp/ChangeLog

@@ -1,5 +1,8 @@
 2009-08-31  Carsten Dominik  <carsten.dominik@gmail.com>
 
+	* org-exp.el (org-export-select-backend-specific-text): Match in 2
+	steps, to avoid regexp problems.
+
 	* org.el (org-offer-links-in-entry): Improve working with many and
 	duplicate links.
 

lisp/org-exp.el

@@ -1701,7 +1701,7 @@ from the buffer."
 	   (ascii "ASCII" "BEGIN_ASCII" "END_ASCII")
 	   (latex "LaTeX" "BEGIN_LaTeX" "END_LaTeX")))
 	(case-fold-search t)
-	fmt)
+	fmt beg beg-content end end-content)
 
     (while formatters
       (setq fmt (pop formatters))
@@ -1715,16 +1715,17 @@ from the buffer."
 	   (point-at-bol) (min (1+ (point-at-eol)) (point-max))
 	   '(org-protected t))))
       (goto-char (point-min))
-      (while (re-search-forward
-	      (concat "^[ \t]*#\\+" (caddr fmt)
-		      "\\>.*\\(\\(\n.*\\)*?\n\\)[ \t]*#\\+" (cadddr fmt)
-		      "\\>.*\n?") nil t)
-	(if (eq (car fmt) backend)
-	    ;; yes, keep this
-	    (add-text-properties (match-beginning 1) (1+ (match-end 1))
-				 '(org-protected t))
-	  ;; No, this is for a different backend, kill it
-	  (delete-region (match-beginning 0) (match-end 0)))))))
+      (while (re-search-forward (concat "^[ \t]*#\\+" (caddr fmt) "\\>.*\n?")
+				nil t)
+	(setq beg (match-beginning 0) beg-content (match-end 0))
+	(when (re-search-forward (concat "^[ \t]*#\\+" (cadddr fmt) "\\>.*\n?")
+				 nil t)
+	  (setq end (match-end 0) end-content (match-beginning 0))
+	  (if (eq (car fmt) backend)
+	      ;; yes, keep this
+	      (add-text-properties beg-content end-content '(org-protected t))
+	    ;; No, this is for a different backend, kill it
+	    (delete-region beg end)))))))
 
 (defun org-export-mark-blockquote-verse-center ()
   "Mark block quote and verse environments with special cookies.