feat: drop use std.net instead of zig-network

build.zig

@@ -1,16 +1,40 @@
 const std = @import("std");
 
+// Although this function looks imperative, note that its job is to
+// declaratively construct a build graph that will be executed by an external
+// runner.
 pub fn build(b: *std.Build) void {
+    // Standard target options allows the person running `zig build` to choose
+    // what target to build for. Here we do not override the defaults, which
+    // means any target is allowed, and the default is native. Other options
+    // for restricting supported target set are available.
     const target = b.standardTargetOptions(.{});
-    const net_dep = b.dependency("zig-network", .{}); // https://github.com/MasterQ32/zig-network
+
+    // Standard optimization options allow the person running `zig build` to select
+    // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall. Here we do not
+    // set a preferred release mode, allowing the user to decide how to optimize.
+    const optimize = b.standardOptimizeOption(.{});
+
+    const zig_network = b.dependency("zig-network", .{}); // https://github.com/MasterQ32/zig-network
 
     _ = b.addModule("gdbstub", .{
         .source_file = .{ .path = "src/lib.zig" },
-        .dependencies = &.{.{ .name = "network", .module = net_dep.module("network") }},
+        .dependencies = &.{.{ .name = "network", .module = zig_network.module("network") }},
     });
 
-    const lib_test = b.addTest(.{ .root_source_file = .{ .path = "src/lib.zig" }, .target = target });
+    // Creates a step for unit testing. This only builds the test executable
+    // but does not run it.
+    const lib_tests = b.addTest(.{
+        .root_source_file = .{ .path = "src/lib.zig" },
+        .target = target,
+        .optimize = optimize,
+    });
 
-    const test_step = b.step("test", "Run Library Tests");
-    test_step.dependOn(&lib_test.step);
+    const run_lib_tests = b.addRunArtifact(lib_tests);
+
+    // This creates a build step. It will be visible in the `zig build --help` menu,
+    // and can be selected like this: `zig build test`
+    // This will evaluate the `test` step rather than the default, which is "install".
+    const test_step = b.step("test", "Run library tests");
+    test_step.dependOn(&run_lib_tests.step);
 }

build.zig.zon

@@ -3,8 +3,8 @@
     .version = "0.1.0",
     .dependencies = .{
         .@"zig-network" = .{
-            .url = "https://github.com/MasterQ32/zig-network/archive/86c315be67c7567195cc426615d81202a39bbb91.tar.gz",
-            .hash = "1220746fef79fb9774d76a0a5d746ccf30cfc847bce4a3a7388c3451817b7ab92869",
+            .url = "https://github.com/MasterQ32/zig-network/archive/07ef40cacd7b00bc0f26e254d97d4d4c9071195a.tar.gz",
+            .hash = "12204d3d4c1184d379a78399e5ddd8a46fe19ca6c991d5c9b909c1980d14acb1dede",
         },
     },
 }

src/Packet.zig

@@ -293,7 +293,7 @@ pub fn checksum(input: []const u8) u8 {
     var sum: usize = 0;
     for (input) |char| sum += char;
 
-    return @truncate(u8, sum);
+    return @truncate(sum);
 }
 
 fn verify(input: []const u8, chksum: u8) bool {

src/Server.zig

@@ -1,12 +1,12 @@
 const std = @import("std");
-const network = @import("network");
 const Packet = @import("Packet.zig");
-
-const Socket = network.Socket;
-const Allocator = std.mem.Allocator;
-const Atomic = std.atomic.Atomic;
 const Emulator = @import("lib.zig").Emulator;
 
+const Atomic = std.atomic.Atomic;
+const Allocator = std.mem.Allocator;
+const Server = std.net.StreamServer;
+const Connection = Server.Connection;
+
 const Self = @This();
 const log = std.log.scoped(.Server);
 const port: u16 = 2424;
@@ -57,32 +57,24 @@ pub const memory_map: []const u8 =
 // FIXME: Shouldn't this be a Packet Struct?
 pkt_cache: ?[]const u8 = null,
 
-client: Socket,
-_socket: Socket,
+server: Server,
+client: Server.Connection,
 
 emu: Emulator,
 
 pub fn init(emulator: Emulator) !Self {
-    try network.init();
+    var server = std.net.StreamServer.init(.{});
+    server.listen(std.net.Address.initIp4([_]u8{0} ** 4, port));
 
-    var socket = try Socket.create(.ipv4, .tcp);
-    try socket.bindToPort(port);
-    try socket.listen();
+    var client = try server.accept();
+    log.info("client connected from {}", .{client.address});
 
-    var client = try socket.accept(); // TODO: This blocks, is this OK?
-
-    const endpoint = try client.getLocalEndPoint();
-    log.info("client connected from {}", .{endpoint});
-
-    return .{ .emu = emulator, ._socket = socket, .client = client };
+    return .{ .emu = emulator, .server = server, .client = client };
 }
 
 pub fn deinit(self: *Self, allocator: Allocator) void {
     self.reset(allocator);
-
-    self.client.close();
-    self._socket.close();
-    network.deinit();
+    self.server.deinit();
 
     self.* = undefined;
 }
@@ -99,7 +91,7 @@ pub fn run(self: *Self, allocator: Allocator, quit: *Atomic(bool)) !void {
     var buf: [Packet.max_len]u8 = undefined;
 
     while (true) {
-        const len = try self.client.receive(&buf);
+        const len = try self.client.stream.readAll(&buf);
         if (len == 0) break;
 
         if (quit.load(.Monotonic)) break;
@@ -113,7 +105,7 @@ pub fn run(self: *Self, allocator: Allocator, quit: *Atomic(bool)) !void {
 }
 
 fn parse(self: *Self, allocator: Allocator, input: []const u8) !Action {
-    // log.debug("-> {s}", .{input});
+    log.debug("-> {s}", .{input});
 
     return switch (input[0]) {
         '+' => blk: {
@@ -150,7 +142,7 @@ fn send(self: *Self, allocator: Allocator, action: Action) !void {
     switch (action) {
         .send => |pkt| {
             _ = try self.client.send(pkt);
-            // log.debug("<- {s}", .{pkt});
+            log.debug("<- {s}", .{pkt});
 
             self.reset(allocator);
             self.pkt_cache = pkt;
@@ -160,18 +152,18 @@ fn send(self: *Self, allocator: Allocator, action: Action) !void {
 
             if (self.pkt_cache) |pkt| {
                 _ = try self.client.send(pkt);
-                // log.debug("<- {s}", .{pkt});
+                log.debug("<- {s}", .{pkt});
             }
         },
         .ack => {
             _ = try self.client.send("+");
-            // log.debug("<- +", .{});
+            log.debug("<- +", .{});
 
             self.reset(allocator);
         },
         .nack => {
             _ = try self.client.send("-");
-            // log.debug("<- -", .{});
+            log.debug("<- -", .{});
 
             self.reset(allocator);
         },

src/lib.zig

@@ -35,35 +35,33 @@ pub const Emulator = struct {
         if (ptr_info != .Pointer) @compileError("ptr must be a pointer");
         if (ptr_info.Pointer.size != .One) @compileError("ptr must be a single-item pointer");
 
-        const alignment = ptr_info.Pointer.alignment;
-
         const gen = struct {
             pub fn readImpl(pointer: *anyopaque, addr: u32) u8 {
-                const self = @ptrCast(Ptr, @alignCast(alignment, pointer));
+                const self: Ptr = @ptrCast(@alignCast(pointer));
 
                 return @call(.always_inline, ptr_info.Pointer.child.read, .{ self, addr });
             }
 
             pub fn writeImpl(pointer: *anyopaque, addr: u32, value: u8) void {
-                const self = @ptrCast(Ptr, @alignCast(alignment, pointer));
+                const self: Ptr = @ptrCast(@alignCast(pointer));
 
                 return @call(.always_inline, ptr_info.Pointer.child.write, .{ self, addr, value });
             }
 
             pub fn registersImpl(pointer: *anyopaque) *[16]u32 {
-                const self = @ptrCast(Ptr, @alignCast(alignment, pointer));
+                const self: Ptr = @ptrCast(@alignCast(pointer));
 
                 return @call(.always_inline, ptr_info.Pointer.child.registers, .{self});
             }
 
             pub fn cpsrImpl(pointer: *anyopaque) u32 {
-                const self = @ptrCast(Ptr, @alignCast(alignment, pointer));
+                const self: Ptr = @ptrCast(@alignCast(pointer));
 
                 return @call(.always_inline, ptr_info.Pointer.child.cpsr, .{self});
             }
 
             pub fn stepImpl(pointer: *anyopaque) void {
-                const self = @ptrCast(Ptr, @alignCast(alignment, pointer));
+                const self: Ptr = @ptrCast(@alignCast(pointer));
 
                 return @call(.always_inline, ptr_info.Pointer.child.step, .{self});
             }