Start working on updating global data structures

1 files changed, 58 insertions, 0 deletions

diff --git a/src/globals.rs b/src/globals.rs
new file mode 100644
index 0000000..27d3bbd
--- /dev/null
+++ b/src/globals.rs
@@ -0,0 +1,58 @@
+use std::cell::RefCell;
+use std::rc::Rc;
+
+use rustv::isa;
+use rustv::memory::{Memory, MemoryInterface, Mmu};
+
+use memory_tracker::MemoryTracker;
+
+pub const HOME_STATUS: isa::Address = 0xFFF00;
+
+/// Update the various global data structures as requested by other
+/// subsystems.
+// Intended to be passed around as &'a GlobalsUpdater
+pub struct GlobalsUpdater<'a> {
+    // TODO: weak reference?
+    memory: Rc<RefCell<MemoryTracker>>,
+    mmu1: Box<Mmu + 'a>,
+    mmu2: Box<Mmu + 'a>,
+}
+
+impl<'a> GlobalsUpdater<'a> {
+    pub fn new(memory: Rc<RefCell<MemoryTracker>>,
+               mmu1: Box<Mmu + 'a>, mmu2: Box<Mmu + 'a>) -> GlobalsUpdater<'a> {
+        GlobalsUpdater {
+            memory: memory,
+            mmu1: mmu1,
+            mmu2: mmu2,
+        }
+    }
+
+    pub fn init_memory(&self) {
+        // Initialize taunt array to all -1
+        for offset in 0..(228 / 4) {
+            let address1 = self.mmu1.translate(HOME_STATUS + 28 + offset);
+            let address2 = self.mmu2.translate(HOME_STATUS + 28 + offset);
+            let _ = self.memory.borrow_mut().write_word(
+                address1,
+                (-1 as i32) as isa::Word);
+            let _ = self.memory.borrow_mut().write_word(
+                address2,
+                (-1 as i32) as isa::Word);
+        }
+    }
+
+    // TODO: how to distinguish which player?
+    pub fn fetch_tag(&self, tag: isa::Address, index: u32) {
+        // TODO: assert index is 0 or 1
+        let address = HOME_STATUS;
+    }
+
+    pub fn finish_tag(&self, tag: isa::Address, index: u32) {
+
+    }
+
+    pub fn update_score(&self, player1: i64, player2: i64) {
+
+    }
+}