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Jeeves 2024-04-20 06:05:30 -06:00
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* text=auto eol=lf

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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-out/
/release/
/debug/
/build/
/build-*/
/docgen_tmp/

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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(.{});
// 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 lib = b.addStaticLibrary(.{
.name = "master",
// In this case the main source file is merely a path, however, in more
// complicated build scripts, this could be a generated file.
.root_source_file = b.path("src/root.zig"),
.target = target,
.optimize = optimize,
});
// This declares intent for the library to be installed into the standard
// location when the user invokes the "install" step (the default step when
// running `zig build`).
b.installArtifact(lib);
const exe = b.addExecutable(.{
.name = "master",
.root_source_file = b.path("src/main.zig"),
.target = target,
.optimize = optimize,
});
// This declares intent for the executable to be installed into the
// standard location when the user invokes the "install" step (the default
// step when running `zig build`).
b.installArtifact(exe);
// This *creates* a Run step in the build graph, to be executed when another
// step is evaluated that depends on it. The next line below will establish
// such a dependency.
const run_cmd = b.addRunArtifact(exe);
// By making the run step depend on the install step, it will be run from the
// installation directory rather than directly from within the cache directory.
// This is not necessary, however, if the application depends on other installed
// files, this ensures they will be present and in the expected location.
run_cmd.step.dependOn(b.getInstallStep());
// This allows the user to pass arguments to the application in the build
// command itself, like this: `zig build run -- arg1 arg2 etc`
if (b.args) |args| {
run_cmd.addArgs(args);
}
// This creates a build step. It will be visible in the `zig build --help` menu,
// and can be selected like this: `zig build run`
// This will evaluate the `run` step rather than the default, which is "install".
const run_step = b.step("run", "Run the app");
run_step.dependOn(&run_cmd.step);
// Creates a step for unit testing. This only builds the test executable
// but does not run it.
const lib_unit_tests = b.addTest(.{
.root_source_file = b.path("src/root.zig"),
.target = target,
.optimize = optimize,
});
const run_lib_unit_tests = b.addRunArtifact(lib_unit_tests);
const exe_unit_tests = b.addTest(.{
.root_source_file = b.path("src/main.zig"),
.target = target,
.optimize = optimize,
});
const run_exe_unit_tests = b.addRunArtifact(exe_unit_tests);
// Similar to creating the run step earlier, this exposes a `test` step to
// the `zig build --help` menu, providing a way for the user to request
// running the unit tests.
const test_step = b.step("test", "Run unit tests");
test_step.dependOn(&run_lib_unit_tests.step);
test_step.dependOn(&run_exe_unit_tests.step);
}

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.{
.name = "master",
// This is a [Semantic Version](https://semver.org/).
// In a future version of Zig it will be used for package deduplication.
.version = "0.0.0",
// This field is optional.
// This is currently advisory only; Zig does not yet do anything
// with this value.
//.minimum_zig_version = "0.11.0",
// This field is optional.
// Each dependency must either provide a `url` and `hash`, or a `path`.
// `zig build --fetch` can be used to fetch all dependencies of a package, recursively.
// Once all dependencies are fetched, `zig build` no longer requires
// internet connectivity.
.dependencies = .{
// See `zig fetch --save <url>` for a command-line interface for adding dependencies.
//.example = .{
// // When updating this field to a new URL, be sure to delete the corresponding
// // `hash`, otherwise you are communicating that you expect to find the old hash at
// // the new URL.
// .url = "https://example.com/foo.tar.gz",
//
// // This is computed from the file contents of the directory of files that is
// // obtained after fetching `url` and applying the inclusion rules given by
// // `paths`.
// //
// // This field is the source of truth; packages do not come from a `url`; they
// // come from a `hash`. `url` is just one of many possible mirrors for how to
// // obtain a package matching this `hash`.
// //
// // Uses the [multihash](https://multiformats.io/multihash/) format.
// .hash = "...",
//
// // When this is provided, the package is found in a directory relative to the
// // build root. In this case the package's hash is irrelevant and therefore not
// // computed. This field and `url` are mutually exclusive.
// .path = "foo",
// // When this is set to `true`, a package is declared to be lazily
// // fetched. This makes the dependency only get fetched if it is
// // actually used.
// .lazy = false,
//},
},
// Specifies the set of files and directories that are included in this package.
// Only files and directories listed here are included in the `hash` that
// is computed for this package.
// Paths are relative to the build root. Use the empty string (`""`) to refer to
// the build root itself.
// A directory listed here means that all files within, recursively, are included.
.paths = .{
// This makes *all* files, recursively, included in this package. It is generally
// better to explicitly list the files and directories instead, to insure that
// fetching from tarballs, file system paths, and version control all result
// in the same contents hash.
"",
// For example...
//"build.zig",
//"build.zig.zon",
//"src",
//"LICENSE",
//"README.md",
},
}

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{
description = "Zig project flake";
inputs = {
zig2nix.url = "github:Cloudef/zig2nix";
};
outputs = { zig2nix, ... }: let
flake-utils = zig2nix.inputs.flake-utils;
in (flake-utils.lib.eachDefaultSystem (system: let
# Zig flake helper
# Check the flake.nix in zig2nix project for more options:
# <https://github.com/Cloudef/zig2nix/blob/master/flake.nix>
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 {
# nix build .#target.{zig-target}
# e.g. nix build .#target.x86_64-linux-gnu
packages.target = genAttrs allTargetTriples (target: env.packageForTarget target ({
src = cleanSource ./.;
nativeBuildInputs = with env.pkgs; [];
buildInputs = with env.pkgsForTarget target; [];
# Smaller binaries and avoids shipping glibc.
zigPreferMusl = true;
# This disables LD_LIBRARY_PATH mangling, binary patching etc...
# The package won't be usable inside nix.
zigDisableWrap = true;
} // optionalAttrs (!pathExists ./build.zig.zon) {
pname = "my-zig-project";
version = "0.0.0";
}));
# nix build .
packages.default = packages.target.${system-triple}.override {
# Prefer nix friendly settings.
zigPreferMusl = false;
zigDisableWrap = false;
};
# For bundling with nix bundle for running outside of nix
# example: https://github.com/ralismark/nix-appimage
apps.bundle.target = genAttrs allTargetTriples (target: let
pkg = packages.target.${target};
in {
type = "app";
program = "${pkg}/bin/master";
});
# default bundle
apps.bundle.default = apps.bundle.target.${system-triple};
# nix run .
apps.default = env.app [] "zig build run -- \"$@\"";
# nix run .#build
apps.build = env.app [] "zig build \"$@\"";
# nix run .#test
apps.test = env.app [] "zig build test -- \"$@\"";
# nix run .#docs
apps.docs = env.app [] "zig build docs -- \"$@\"";
# nix run .#deps
apps.deps = env.showExternalDeps;
# nix run .#zon2json
apps.zon2json = env.app [env.zon2json] "zon2json \"$@\"";
# nix run .#zon2json-lock
apps.zon2json-lock = env.app [env.zon2json-lock] "zon2json-lock \"$@\"";
# nix run .#zon2nix
apps.zon2nix = env.app [env.zon2nix] "zon2nix \"$@\"";
# nix develop
devShells.default = env.mkShell {};
}));
}

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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 uxn = Uxn{
.mem = try allocator.alloc(u8, 0xFFFF),
.ws = try allocator.alloc(u8, 0xFF),
.rs = try allocator.alloc(u8, 0xFF),
.wsp = 0,
.rsp = 0,
.pc = 0x0100,
};
defer allocator.free(uxn.mem);
defer allocator.free(uxn.ws);
defer allocator.free(uxn.rs);
while (true) uxn.loop();
}
pub const Uxn = struct {
mem: [0xFFFF]u8,
// ws: [0xFF]u8,
// rs: [0xFF]u8,
// wsp: u8,
// rsp: u8,
ws: Stack,
rs: Stack,
pc: u16,
const Stack = struct {
s: *[0xFF]u8,
sp: *u8,
};
pub fn loop(self: *Uxn) void {
switch (self.mem[self.pc]) {
0x00 => {}, // BRK
0x01 => inc(&self.ws, false, false), // INC
0x02 => pop(&self.ws, false, false), // POP
0x03 => nip(&self.ws, false, false), // NIP
0x04 => swp(&self.ws, false, false), // SWP
0x05 => {}, // ROT
0x06 => {}, // DUP
0x07 => {}, // OVR
0x08 => {}, // EQU
0x09 => {}, // NEQ
0x0A => {}, // GTH
0x0B => {}, // LTH
0x0C => {}, // JMP
0x0D => {}, // JCN
0x0E => {}, // JSR
0x0F => {}, // STH
0x10 => {}, // LDZ
0x11 => {}, // STZ
0x12 => {}, // LDR
0x13 => {}, // STR
0x14 => {}, // LDA
0x15 => {}, // STA
0x16 => {}, // DEI
0x17 => {}, // DEO
0x18 => {}, // ADD
0x19 => {}, // SUB
0x1A => {}, // MUL
0x1B => {}, // DIV
0x1C => {}, // AND
0x1D => {}, // ORA
0x1E => {}, // EOR
0x1F => {}, // SFT
}
}
fn brk() void {}
fn inc(stack: *Stack, comptime short: bool, comptime keep: bool) void {
_ = short;
if (keep) {
stack.s[stack.sp +% 1] = stack.s[stack.sp] +% 1;
stack.sp +%= 1;
} else {
stack.s[stack.sp] +%= 1;
}
}
fn pop(stack: *Stack, comptime short: bool, comptime keep: bool) void {
if (!keep) {
if (short) stack.sp -%= 2 else stack.sp -%= 1;
}
}
fn nip(stack: *Stack, comptime short: bool, comptime keep: bool) void {
_ = short;
if (!keep) {
stack.sp -%= 1;
stack.s[stack.sp] = stack.s[stack.sp +% 1];
}
}
fn swp(stack: *Stack, comptime short: bool, comptime keep: bool) void {
_ = short;
if (keep) {
stack.s[stack.sp +% 1] = stack.s[stack.sp];
stack.s[stack.sp +% 2] = stack.s[stack.sp -% 1];
} else {
const a = stack.s[stack.sp -% 1];
stack.s[stack.sp -% 1] = stack.s[stack.sp];
stack.sp = a;
}
}
fn dup() void {}
fn ovr() void {}
fn equ() void {}
fn neq() void {}
fn gth() void {}
fn lth() void {}
fn jmp() void {}
fn jcn() void {}
fn jsr() void {}
fn sth() void {}
fn ldz() void {}
fn stz() void {}
fn ldr() void {}
fn str() void {}
fn lda() void {}
fn sta() void {}
fn dei() void {}
fn deo() void {}
fn add() void {}
fn sub() void {}
fn mul() void {}
fn div() void {}
fn @"and"() void {}
fn ora() void {}
fn eor() void {}
fn sft() void {}
};

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const std = @import("std");
const testing = std.testing;
export fn add(a: i32, b: i32) i32 {
return a + b;
}
test "basic add functionality" {
try testing.expect(add(3, 7) == 10);
}