add GList/GSList wrappers

source/tycho/interfaces.rs

@@ -3,6 +3,7 @@
 use cairo_sys::*;
 use gdk_pixbuf_sys::*;
 use gdk_sys::*;
+use glib_sys::*;
 use gobject_sys::*;
 use gtk_sys::*;
 use maraiah::{c_str,
@@ -175,6 +176,64 @@ impl<T> Refc<'_, T>
    pub fn own(p: *mut T) -> Self {unsafe {g_object_ref(p as _);} Self::new(p)}
 }
 
+impl ListD
+{
+   pub fn new(head: *mut GList) -> Self {Self{head, iter: head}}
+}
+
+impl Iterator for ListD
+{
+   type Item = gpointer;
+
+   fn next(&mut self) -> Option<gpointer> {
+      if self.iter != ffi::null_mut() {
+         let obj = unsafe {
+            let obj = (*self.iter).data;
+            self.iter = (*self.iter).next;
+            obj
+         };
+
+         Some(obj)
+      } else {
+         None
+      }
+   }
+}
+
+impl Drop for ListD
+{
+   fn drop(&mut self) {unsafe {g_list_free(self.head);}}
+}
+
+impl ListS
+{
+   pub fn new(head: *mut GSList) -> Self {Self{head, iter: head}}
+}
+
+impl Iterator for ListS
+{
+   type Item = gpointer;
+
+   fn next(&mut self) -> Option<gpointer> {
+      if self.iter != ffi::null_mut() {
+         let obj = unsafe {
+            let obj = (*self.iter).data;
+            self.iter = (*self.iter).next;
+            obj
+         };
+
+         Some(obj)
+      } else {
+         None
+      }
+   }
+}
+
+impl Drop for ListS
+{
+   fn drop(&mut self) {unsafe {g_slist_free(self.head);}}
+}
+
 /// An image for a `CrDrawArea`.
 pub struct CrImage(pub *const GdkPixbuf);
 
@@ -203,4 +262,18 @@ pub struct Refc<'a, T>
    l: PhantomData<&'a *mut T>,
 }
 
+/// A GList wrapper.
+pub struct ListD
+{
+   head: *mut GList,
+   iter: *mut GList,
+}
+
+/// A GSList wrapper.
+pub struct ListS
+{
+   head: *mut GSList,
+   iter: *mut GSList,
+}
+
 // EOF