commit bfa17006d2f902111195e676165d45a0ae0da920 Author: Warwick Date: Thu Nov 14 19:25:57 2024 +0000 Got a basic zig interface going thank god. Raw dogging those vtables diff --git a/build.zig b/build.zig new file mode 100644 index 0000000..29ecfcf --- /dev/null +++ b/build.zig @@ -0,0 +1,52 @@ +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 exe = b.addExecutable(.{ + .name = "zboard2", + .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); +} diff --git a/build.zig.zon b/build.zig.zon new file mode 100644 index 0000000..eb3a5e3 --- /dev/null +++ b/build.zig.zon @@ -0,0 +1,72 @@ +.{ + // This is the default name used by packages depending on this one. For + // example, when a user runs `zig fetch --save `, this field is used + // as the key in the `dependencies` table. Although the user can choose a + // different name, most users will stick with this provided value. + // + // It is redundant to include "zig" in this name because it is already + // within the Zig package namespace. + .name = "zboard2", + + // 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 ` 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. Only files listed here will remain on disk + // when using the zig package manager. As a rule of thumb, one should list + // files required for compilation plus any license(s). + // 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 = .{ + "build.zig", + "build.zig.zon", + "src", + // For example... + //"LICENSE", + //"README.md", + }, +} diff --git a/src/ScreenInterface.zig b/src/ScreenInterface.zig new file mode 100644 index 0000000..c41906f --- /dev/null +++ b/src/ScreenInterface.zig @@ -0,0 +1,22 @@ +pub const ScreenInterface = struct { + ptr: *anyopaque, + vtable: VTable, + + pub fn init(self: ScreenInterface) anyerror!ScreenInterface { + return self.vtable.initFn(self.ptr); + } + + pub fn deinit(self: ScreenInterface) anyerror!void { + return self.vtable.deinitFn(self.ptr); + } + + pub fn run(self: ScreenInterface) anyerror!void { + return self.vtable.runFn(self.ptr); + } +}; + +pub const VTable = struct { + initFn: *const fn (self: *anyopaque) anyerror!ScreenInterface, + deinitFn: *const fn (self: *anyopaque) anyerror!void, + runFn: *const fn (self: *anyopaque) anyerror!void, +}; diff --git a/src/TopicScreen.zig b/src/TopicScreen.zig new file mode 100644 index 0000000..482a8bd --- /dev/null +++ b/src/TopicScreen.zig @@ -0,0 +1,28 @@ +const std = @import("std"); +const ScreenInterface = @import("ScreenInterface.zig").ScreenInterface; + +pub const TopicScreen = struct { + topic: []const u8 = "ayy", + + pub fn init(ptr: *anyopaque) !ScreenInterface { + const self: *TopicScreen = @ptrCast(@alignCast(ptr)); + std.debug.print("{s}", .{self.topic}); + return self.screenInterface(); + } + pub fn deinit(ptr: *anyopaque) !void { + const self: *TopicScreen = @ptrCast(@alignCast(ptr)); + return std.debug.print("{s}", .{self.topic}); + } + pub fn run(ptr: *anyopaque) !void { + const self: *TopicScreen = @ptrCast(@alignCast(ptr)); + return std.debug.print("{s}", .{self.topic}); + } + + pub fn screenInterface(self: *TopicScreen) ScreenInterface { + return .{ .ptr = self, .vtable = .{ + .initFn = TopicScreen.init, + .deinitFn = TopicScreen.deinit, + .runFn = TopicScreen.run, + } }; + } +}; diff --git a/src/main.zig b/src/main.zig new file mode 100644 index 0000000..9d27a5d --- /dev/null +++ b/src/main.zig @@ -0,0 +1,10 @@ +const std = @import("std"); +const TopicScreen = @import("TopicScreen.zig").TopicScreen; + +pub fn main() !void { + var topic_screen = TopicScreen{ .topic = "it worked?" }; + var screen_interface = topic_screen.screenInterface(); + _ = try screen_interface.init(); + _ = try screen_interface.run(); + _ = try screen_interface.deinit(); +}