init

.gitattributes

@@ -0,0 +1 @@
+* text=auto eol=lf

.gitignore

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+# This file is for zig-specific build artifacts.
+# If you have OS-specific or editor-specific files to ignore,
+# such as *.swp or .DS_Store, put those in your global
+# ~/.gitignore and put this in your ~/.gitconfig:
+#
+# [core]
+#     excludesfile = ~/.gitignore
+#
+# Cheers!
+# -andrewrk
+
+.zig-cache/
+zig-cache/
+zig-out/
+/release/
+/debug/
+/build/
+/build-*/
+/docgen_tmp/

build.zig

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+const std = @import("std");
+
+pub fn build(b: *std.Build) void {
+    const target = b.standardTargetOptions(.{});
+    const optimize = b.standardOptimizeOption(.{});
+
+    const exe_mod = b.createModule(.{
+        .root_source_file = b.path("src/main.zig"),
+        .target = target,
+        .optimize = optimize,
+    });
+
+    const exe = b.addExecutable(.{
+        .name = "lble",
+        .root_module = exe_mod,
+    });
+    b.installArtifact(exe);
+
+    const run_cmd = b.addRunArtifact(exe);
+    run_cmd.step.dependOn(b.getInstallStep());
+    if (b.args) |args| {
+        run_cmd.addArgs(args);
+    }
+
+    const run_step = b.step("run", "Run the app");
+    run_step.dependOn(&run_cmd.step);
+
+    const exe_unit_tests = b.addTest(.{
+        .root_module = exe_mod,
+    });
+
+    const run_exe_unit_tests = b.addRunArtifact(exe_unit_tests);
+
+    const test_step = b.step("test", "Run unit tests");
+    test_step.dependOn(&run_exe_unit_tests.step);
+}

build.zig.zon

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+.{
+    .name = "lble",
+    .version = "0.0.0",
+    .minimum_zig_version = "0.14.0",
+    .dependencies = .{},
+    .paths = .{
+        "build.zig",
+        "build.zig.zon",
+        "src",
+    },
+}

flake.lock

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+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1736817698,
+        "narHash": "sha256-1m+JP9RUsbeLVv/tF1DX3Ew9Vl/fatXnlh/g5k3jcSk=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "2b1fca3296ddd1602d2c4f104a4050e006f4b0cb",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "zig2nix": "zig2nix"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "zig2nix": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1739237314,
+        "narHash": "sha256-40cMNh8VYNeStriQojG8ehmbuQm1CE0ga1p7Rshg0Kg=",
+        "owner": "Cloudef",
+        "repo": "zig2nix",
+        "rev": "f729393c8f73fbc075d4f1c4b837c5ca4af2ec79",
+        "type": "github"
+      },
+      "original": {
+        "owner": "Cloudef",
+        "repo": "zig2nix",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  inputs = {
+    zig2nix.url = "github:Cloudef/zig2nix";
+  };
+
+  outputs = { zig2nix, ... }: let
+    flake-utils = zig2nix.inputs.flake-utils;
+  in (flake-utils.lib.eachDefaultSystem (system: let
+      env = zig2nix.outputs.zig-env.${system} { zig = zig2nix.outputs.packages.${system}.zig.master.bin; };
+      system-triple = env.lib.zigTripleFromString system;
+    in with builtins; with env.lib; with env.pkgs.lib; rec {
+      packages.target = genAttrs allTargetTriples (target: env.packageForTarget target ({
+        src = cleanSource ./.;
+
+        nativeBuildInputs = with env.pkgs; [];
+        buildInputs = with env.pkgsForTarget target; [];
+
+        zigPreferMusl = true;
+        zigDisableWrap = true;
+      }));
+
+      packages.default = packages.target.${system-triple}.override {
+        zigPreferMusl = false;
+        zigDisableWrap = false;
+      };
+
+      apps.bundle.default = apps.bundle.target.${system-triple};
+
+      apps.default = env.app [] "zig build run -- \"$@\"";
+      apps.build = env.app [] "zig build \"$@\"";
+      apps.test = env.app [] "zig build test -- \"$@\"";
+      apps.docs = env.app [] "zig build docs -- \"$@\"";
+      apps.deps = env.showExternalDeps;
+
+      apps.zon2json = env.app [env.zon2json] "zon2json \"$@\"";
+      apps.zon2json-lock = env.app [env.zon2json-lock] "zon2json-lock \"$@\"";
+      apps.zon2nix = env.app [env.zon2nix] "zon2nix \"$@\"";
+
+      devShells.default = env.mkShell {};
+    }));
+}

src/main.zig

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+const std = @import("std");
+
+pub fn main() !void {
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    defer _ = gpa.deinit();
+    // const allocator = gpa.allocator();
+
+    var wire1 = Wire{};
+    var wire2 = Wire{};
+    var wire3 = Wire{};
+    var wire4 = Wire{};
+
+    var buffer1 = Buffer{ .input = &wire1, .output = &wire2 };
+    var buffer2 = Buffer{ .input = &wire2, .output = &wire3 };
+    var buffer3 = Buffer{ .input = &wire3, .output = &wire4 };
+
+    var alternating = false;
+    while (true) {
+        alternating = !alternating;
+
+        wire1.digital = alternating;
+        wire1.analog = if (alternating) 1.0 else 0.0;
+        buffer1.process();
+        buffer2.process();
+        buffer3.process();
+
+        std.debug.print("input:  {}\noutput: {}\n", .{ buffer1.input, buffer3.output });
+    }
+}
+
+pub const Wire = struct {
+    digital: bool = false,
+    analog: f32 = 0.0,
+
+    pub fn format(self: Wire, comptime fmt: []const u8, options: std.fmt.FormatOptions, writer: anytype) !void {
+        _ = .{ fmt, options };
+        try writer.print("Wire({s} | {d:0>1.4})", .{
+            if (self.digital) "1" else "0",
+            self.analog,
+        });
+    }
+
+    fn analogSet(self: *Wire, value: f32) void {
+        self.analog = std.math.clamp(value, 0.0, 1.0);
+    }
+};
+
+pub const Buffer = struct {
+    input: *Wire,
+    output: *Wire,
+
+    pub fn process(self: *Buffer) void {
+        self.output.analogSet(self.input.analog);
+    }
+};
+
+pub const Not = struct {
+    input: *Wire,
+    output: *Wire,
+
+    // TODO check implementation
+    pub fn process(self: *Buffer) void {
+        self.output.analogSet(1.0 - self.input.analog);
+    }
+};