[retro-gtk/wip/aplazas/expose-options] core: Add option accessors

[Adrien Plazas <aplazas src gnome org>]

commit e41fccb2ac8c7eb8be50621d9c646f390bbfb4a0
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Thu May 18 16:33:22 2017 +0200

    core: Add option accessors
    
    Add the has_option(), get_option_values() and set_option() methods to
    Core, allowing some access the options of the core.

 retro-gtk/core.vala |   14 +++++++++++++-
 1 files changed, 13 insertions(+), 1 deletions(-)
---
diff --git a/retro-gtk/core.vala b/retro-gtk/core.vala
index d7d95c9..cc1905b 100644
--- a/retro-gtk/core.vala
+++ b/retro-gtk/core.vala
@@ -214,7 +214,7 @@ public class Core : Object {
        private extern void set_callbacks ();
 
        internal Module module;
-       internal Variables variables_interface;
+       internal Options variables_interface;
 
        internal float aspect_ratio;
        internal bool overscan;
@@ -385,6 +385,18 @@ public class Core : Object {
         */
        public extern void set_memory (MemoryType id, uint8[] data);
 
+       public bool has_option (string key) {
+               return variables_interface.contains (key);
+       }
+
+       public unowned string[] get_option_values (string key) {
+               return variables_interface.lookup_values (key);
+       }
+
+       public void set_option (owned string key, owned string value) {
+               variables_interface.set_option (key, value);
+       }
+
        private void init_input () {
                if (input_interface == null)
                        return;