Getters and setters for registers

src/cpu.rs

@@ -1,26 +1,100 @@
 pub enum Register {
-    A(u8),
+    A(u8), // Accumulator
+    F(u8), // Flags
     B(u8), 
     C(u8),
     D(u8),
     E(u8),
-    F(u8),
     H(u8),
     L(u8),
+    // This registers are just the same as above but combined to get a 16 bits register
+    BC(u16),
+    DE(u16),
+    HL(u16),
+
     SP(u16),
     PC(u16),
 }
 
 pub struct Registers {
-    a: Register,
-    b: Register,
-    c: Register,
-    d: Register,
-    e: Register,
-    f: Register,
-    h: Register,
-    sp: Register,
-    pc: Register,
+    a: u8,
+    f: u8,
+    b: u8,
+    c: u8,
+    d: u8,
+    e: u8,
+    h: u8,
+    l: u8,
+    sp: u16,
+    pc: u16,
+}
+
+impl Registers {
+    pub fn get(&self, register: Register) -> u16 {
+        match register {
+            Register::A(_) => self.a as u16,
+            Register::B(_) => self.b as u16,
+            Register::C(_) => self.c as u16,
+            Register::D(_) => self.d as u16,
+            Register::E(_) => self.e as u16,
+            Register::F(_) => self.f as u16,
+            Register::H(_) => self.h as u16,
+            Register::L(_) => self.l as u16,
+            Register::BC(_) => self.get_bc(),
+            Register::DE(_) => self.get_de(),
+            Register::HL(_) => self.get_hl(),
+            Register::SP(_) => self.sp,
+            Register::PC(_) => self.pc,
+        }
+    }
+
+    pub fn set(&mut self, register: Register) {
+        match register {
+            Register::A(val) => self.a = val,
+            Register::B(val) => self.b = val,
+            Register::C(val) => self.c = val,
+            Register::D(val) => self.d = val,
+            Register::E(val) => self.e = val,
+            Register::F(val) => self.f = val,
+            Register::H(val) => self.h = val,
+            Register::L(val) => self.l = val,
+            Register::BC(val) => self.set_bc(val),
+            Register::DE(val) => self.set_de(val),
+            Register::HL(val) => self.set_hl(val),
+            Register::SP(val) => self.sp = val,
+            Register::PC(val) => self.pc = val,
+        }
+    }
+
+    fn get_bc(&self) -> u16 {
+        ((self.b as u16) << 8) | (self.c as u16)
+    }
+
+    fn get_de(&self) -> u16 {
+        ((self.d as u16) << 8) | (self.e as u16)
+    }
+
+    fn get_hl(&self) -> u16 {
+        ((self.h as u16) << 8) | (self.l as u16)
+    }
+
+    fn set_bc(&mut self, val: u16) {
+        let bytes = val.to_be_bytes();
+        self.b = bytes[0];
+        self.c = bytes[1];
+    }
+
+    fn set_de(&mut self, val: u16) {
+        let bytes = val.to_be_bytes();
+        self.d = bytes[0];
+        self.e = bytes[1];
+    }
+
+    fn set_hl(&mut self, val: u16) {
+        let bytes = val.to_be_bytes();
+        self.h = bytes[0];
+        self.l = bytes[1];
+    }
 }
 
 pub struct CPU {