src/util/reader.[ch]pp: Add "reader_get_layer" ...

... a utility function to read and sanitize the "layer" and "z-pos" options.

References: #527.

git-svn-id: http://supertux.lethargik.org/svn/supertux/trunk/supertux@6320 837edb03-e0f3-0310-88ca-d4d4e8b29345

diff --git a/src/util/reader.cpp b/src/util/reader.cpp
new file mode 100644 (file)
index 0000000..ae9cd9f
--- /dev/null
+++ b/src/util/reader.cpp
@@ -0,0 +1,45 @@
+/*
+ * src/util/reader.cpp - Utility functions for config handling.
+ * Copyright (C) 2010  Florian Forster
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Authors:
+ *   Florian "octo" Forster <supertux at octo.it>
+ */
+
+#include "util/reader.hpp"
+#include "video/drawing_request.hpp" /* LAYER_GUI */
+
+int reader_get_layer (const Reader& reader, int def)
+{
+  int tmp = 0;
+  bool status;
+
+  status = reader.get ("z-pos", tmp);
+
+  if (!status)
+    status = reader.get ("layer", tmp);
+
+  if (!status)
+    tmp = def;
+
+  if (tmp > (LAYER_GUI - 100))
+    tmp = LAYER_GUI - 100;
+
+  return (tmp);
+} /* int reader_get_layer */
+
+/* vim: set sw=2 et sts=2 : */

diff --git a/src/util/reader.hpp b/src/util/reader.hpp
index be7ec5e..788f7ba 100644 (file)
--- a/src/util/reader.hpp
+++ b/src/util/reader.hpp
@@ -21,6 +21,8 @@
 
 typedef lisp::Lisp Reader;
 
+int reader_get_layer (const Reader& reader, int def);
+
 #endif
 
 /* EOF */