Synch with Oort Gnus.

[elisp/gnus.git-] / lisp / gnus-util.el

diff --git a/lisp/gnus-util.el b/lisp/gnus-util.el
index 8b4f687..e2246d4 100644 (file)
--- a/lisp/gnus-util.el
+++ b/lisp/gnus-util.el
@@ -1207,6 +1207,38 @@ sure of changing the value of `foo'."
 If you find some problem with the directory separator character, try
 \"[/\\\\\]\" for some systems.")
 
+(defun gnus-url-unhex (x)
+  (if (> x ?9)
+      (if (>= x ?a)
+         (+ 10 (- x ?a))
+       (+ 10 (- x ?A)))
+    (- x ?0)))
+
+(defun gnus-url-unhex-string (str &optional allow-newlines)
+  "Remove %XXX embedded spaces, etc in a url.
+If optional second argument ALLOW-NEWLINES is non-nil, then allow the
+decoding of carriage returns and line feeds in the string, which is normally
+forbidden in URL encoding."
+  (setq str (or (mm-subst-char-in-string ?+ ?  str) ""))
+  (let ((tmp "")
+       (case-fold-search t))
+    (while (string-match "%[0-9a-f][0-9a-f]" str)
+      (let* ((start (match-beginning 0))
+            (ch1 (gnus-url-unhex (elt str (+ start 1))))
+            (code (+ (* 16 ch1)
+                     (gnus-url-unhex (elt str (+ start 2))))))
+       (setq tmp (concat
+                  tmp (substring str 0 start)
+                  (cond
+                   (allow-newlines
+                    (char-to-string code))
+                   ((or (= code ?\n) (= code ?\r))
+                    " ")
+                   (t (char-to-string code))))
+             str (substring str (match-end 0)))))
+    (setq tmp (concat tmp str))
+    tmp))
+
 (provide 'gnus-util)
 
 ;;; gnus-util.el ends here