basic Microchip functionality

src/main.zig

@@ -11,6 +11,23 @@ pub fn main() !void {
 
     var circuit = Circuit.init(allocator);
     defer circuit.deinit();
+
+    var microchip = try circuit.addComponent(Microchip);
+
+    var not1 = try circuit.addComponent(Not);
+    var not2 = try microchip.circuit.addComponent(Not);
+    not1.invert_output = false;
+    try microchip.resizeInputs(1);
+    try microchip.resizeOutputs(1);
+    try microchip.connectInput(0, &not2.component, 0);
+    try microchip.connectOutput(&not2.component, 0, 0);
+
+    try circuit.tick();
+    std.log.info("{}", .{microchip.component.getOutput(0)});
+    try circuit.tick();
+    std.log.info("{}", .{microchip.component.getOutput(0)});
+    try circuit.tick();
+    std.log.info("{}", .{microchip.component.getOutput(0)});
 }
 
 test "basic circuit" {
@@ -234,22 +251,18 @@ pub const Component = struct {
     pub const Input = struct {
         signal: ?*Signal = null,
         connection: ?Connection = null,
-
-        pub const Connection = struct {
-            component: *Component,
-            idx: usize,
-        };
     };
     pub const Output = struct {
         signal: Signal = .{},
         connections: Connections = .empty,
-
-        pub const Connections = std.ArrayListUnmanaged(Connection);
-        pub const Connection = struct {
-            component: *Component,
-            idx: usize,
-        };
     };
+
+    pub const Connection = struct {
+        component: *Component,
+        idx: usize,
+    };
+    // TODO wouldn't this need to be a list of ?Connection since an
+    pub const Connections = std.ArrayListUnmanaged(Connection);
     const Inputs = std.ArrayListUnmanaged(Input);
     const Outputs = std.ArrayListUnmanaged(Output);
 
@@ -373,11 +386,15 @@ pub const Microchip = struct {
     component: Component,
 
     circuit: Circuit,
+    outer_to_inner: std.ArrayListUnmanaged(?Component.Connection),
+    inner_to_outer: std.ArrayListUnmanaged(?Component.Connection),
 
     pub fn init(allocator: std.mem.Allocator) !*Microchip {
         var self = try allocator.create(Microchip);
         errdefer allocator.destroy(self);
         self.circuit = Circuit.init(allocator);
+        self.outer_to_inner = .empty;
+        self.inner_to_outer = .empty;
         errdefer self.circuit.deinit();
         try Component.init(&self.component, allocator, "Microchip", 0, 0, &update, &deinit);
         return self;
@@ -385,18 +402,56 @@ pub const Microchip = struct {
 
     pub fn deinit(component: *Component, allocator: std.mem.Allocator) void {
         const self: *Microchip = @fieldParentPtr("component", component);
+        self.outer_to_inner.deinit(self.circuit.allocator);
+        self.inner_to_outer.deinit(self.circuit.allocator);
         self.circuit.deinit();
         allocator.destroy(self);
     }
 
     pub fn update(component: *Component) AllocatorError!void {
         const self: *Microchip = @fieldParentPtr("component", component);
+
+        for (self.outer_to_inner.items, 0..) |connection_opt, idx| {
+            if (connection_opt) |connection| {
+                const outer = component.getInput(idx);
+                const inner = &connection.component.inputs.items[connection.idx];
+                inner.signal = outer;
+            }
+        }
+
         try self.circuit.tick();
+
+        for (self.inner_to_outer.items, 0..) |connection_opt, idx| {
+            if (connection_opt) |connection| {
+                const outer = component.getOutput(idx);
+                const inner = connection.component.getOutput(connection.idx);
+                outer.* = inner.*;
+            }
+        }
+    }
+
+    pub fn resizeInputs(self: *Microchip, new_len: usize) !void {
+        try self.component.resizeInputs(self.circuit.allocator, new_len);
+        try self.outer_to_inner.resize(self.circuit.allocator, new_len);
+    }
+
+    pub fn resizeOutputs(self: *Microchip, new_len: usize) !void {
+        try self.component.resizeOutputs(self.circuit.allocator, new_len);
+        try self.inner_to_outer.resize(self.circuit.allocator, new_len);
+    }
+
+    pub fn connectInput(self: *Microchip, outer_idx: usize, inner: *Component, inner_idx: usize) !void {
+        self.outer_to_inner.items[outer_idx] = .{
+            .component = inner,
+            .idx = inner_idx,
+        };
     }
 
     pub fn connectOutput(self: *Microchip, inner: *Component, inner_idx: usize, outer_idx: usize) !void {
-        _ = .{ self, inner, inner_idx, outer_idx };
-        @compileError("TODO");
+        self.inner_to_outer.items[outer_idx] = .{
+            .component = inner,
+            .idx = inner_idx,
+        };
     }
 };