commit bce43c205fe30dff37dc83045cd8ef05dd71b27f
Author: Martin Ashby <martin@ashbysoft.com>
Date: Fri, 9 Aug 2024 22:08:46 +0100
Initial
Diffstat:
5 files changed, 154 insertions(+), 0 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1,2 @@
+.zig-cache
+zig-out
diff --git a/build.zig b/build.zig
@@ -0,0 +1,91 @@
+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 = "dicer",
+ // 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 = "dicer",
+ .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);
+}
diff --git a/build.zig.zon b/build.zig.zon
@@ -0,0 +1,11 @@
+.{
+ .name = "dicer",
+ .version = "0.0.1",
+ .minimum_zig_version = "0.13.0",
+ .dependencies = .{},
+ .paths = .{
+ "build.zig",
+ "build.zig.zon",
+ "src",
+ },
+}
diff --git a/src/main.zig b/src/main.zig
@@ -0,0 +1,40 @@
+const std = @import("std");
+
+const usage =
+ \\Usage:
+ \\ dicer XdY
+ \\
+ \\Rolls X dice with Y
+ \\
+;
+
+pub fn main() !void {
+ var args = std.process.args();
+ _ = args.skip(); // program name
+ const dice_str = args.next() orelse {
+ try printUsage();
+ return;
+ };
+
+ var spl = std.mem.splitScalar(u8, dice_str, 'd');
+ const count = try std.fmt.parseInt(u64, spl.first(), 10);
+ const sides = try std.fmt.parseInt(u64, spl.next() orelse "6", 10);
+ var wtr = std.io.getStdOut().writer();
+ try wtr.writeAll("Dice roll: ");
+ var total: u64 = 0;
+ for (0..count) |_| {
+ const res = roll(sides);
+ try std.fmt.format(wtr, "{} ", .{res});
+ total += res;
+ }
+ try std.fmt.format(wtr, " total: {}", .{total});
+ try wtr.writeByte('\n');
+}
+
+fn roll(dsize: u64) u64 {
+ return (std.crypto.random.int(u64) % dsize) + 1;
+}
+
+fn printUsage() !void {
+ try std.fmt.format(std.io.getStdOut(), usage, .{});
+}
diff --git a/src/root.zig b/src/root.zig
@@ -0,0 +1,10 @@
+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);
+}
