homebrew-core/Formula/wmctrl.rb

require 'formula'

class Wmctrl < Formula
  homepage 'http://sweb.cz/tripie/utils/wmctrl/'
  url 'http://tomas.styblo.name/wmctrl/dist/wmctrl-1.07.tar.gz'
  md5 '1fe3c7a2caa6071e071ba34f587e1555'

  depends_on 'pkg-config' => :build
  depends_on 'glib'
  depends_on 'gettext'
  depends_on :x11

  def patches
    # Fix for 64-bit arch. See:
    # * http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=362068
    # * http://patch-tracker.debian.org/package/wmctrl/1.07-6
    DATA
  end

  def install
    system "./configure", "--disable-debug", "--disable-dependency-tracking",
                          "--prefix=#{prefix}",
                          "--mandir=#{man}"
    system "make install"
  end
end

__END__
--- wmctrl-1.07.orig/main.c
+++ wmctrl-1.07/main.c
@@ -1425,6 +1425,16 @@
      *
      * long_length = Specifies the length in 32-bit multiples of the
      *               data to be retrieved.
+     *
+     * NOTE:  see
+     * http://mail.gnome.org/archives/wm-spec-list/2003-March/msg00067.html
+     * In particular:
+     *
+     * 	When the X window system was ported to 64-bit architectures, a
+     * rather peculiar design decision was made. 32-bit quantities such
+     * as Window IDs, atoms, etc, were kept as longs in the client side
+     * APIs, even when long was changed to 64 bits.
+     *
      */
     if (XGetWindowProperty(disp, win, xa_prop_name, 0, MAX_PROPERTY_VALUE_LEN / 4, False,
             xa_prop_type, &xa_ret_type, &ret_format,
@@ -1440,7 +1450,18 @@ static gchar *get_property (Display *disp, Window win, /*{{{*/
     }

     /* null terminate the result to make string handling easier */
-    tmp_size = (ret_format / 8) * ret_nitems;
+    switch (ret_format) {
+        case 8:
+            tmp_size = sizeof(char) * ret_nitems;
+            break;
+        case 16:
+            tmp_size = sizeof(short) * ret_nitems;
+            break;
+        case 32:
+        default:
+            tmp_size = sizeof(long) * ret_nitems;
+            break;
+    }
     ret = g_malloc(tmp_size + 1);
     memcpy(ret, ret_prop, tmp_size);
     ret[tmp_size] = '\0';