Rework file system API to support different backends
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continuous-integration/drone/push Build is passing
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979c2a73f3
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1289e9634b
73
src/sys.zig
73
src/sys.zig
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@ -70,8 +70,6 @@ pub const EventLoop = opaque {
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///
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///
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const InitError = error {
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DataFileNotFound,
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DataFileInvalid,
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OutOfSemaphores,
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OutOfMutexes,
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OutOfMemory,
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@ -118,7 +116,6 @@ pub const EventLoop = opaque {
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}
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}
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ext.SDL_free(implementation.user_prefix.ptr);
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ext.SDL_DestroyMutex(implementation.file_system_mutex);
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ext.SDL_DestroySemaphore(implementation.file_system_semaphore);
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}
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@ -148,19 +145,11 @@ pub const EventLoop = opaque {
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///
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///
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fn init() InitError!Implementation {
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const data_file_access = @ptrCast(*FileAccess,
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ext.SDL_RWFromFile("./data.tar", "r+") orelse return error.DataFileNotFound);
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return Implementation{
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.data_archive = tar.Archive.init(data_file_access) catch |err| switch (err) {
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error.Invalid, error.Inaccessible => return error.DataFileInvalid,
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},
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.file_system_semaphore = ext.SDL_CreateSemaphore(0)
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orelse return error.OutOfSemaphores,
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.file_system_mutex = ext.SDL_CreateMutex() orelse return error.OutOfMutexes,
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.data_file = data_file_access,
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.file_system_thread = null,
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};
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}
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@ -177,14 +166,16 @@ pub const EventLoop = opaque {
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while (true) {
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while (implementation.file_system_messages) |messages| {
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const root = @import("./sys.zig");
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switch (messages.request) {
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.exit => return 0,
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.log => |*log_request| .log(log_request.kind, log_request.message),
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.log => |*log_request| root.log(log_request.kind, log_request.message),
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.open => |*open_request| open_request.result =
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.open(open_request.mode, open_request.file_system_path),
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root.open(open_request.mode, open_request.file_system_path.*),
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.close => |*close_request| .close(close_request.file_access),
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.close => |*close_request| root.close(close_request.file_access),
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.read_file => |read_request| {
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// TODO: Implement.
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@ -444,13 +435,17 @@ pub const FileSystem = struct {
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///
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///
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///
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pub const Root = struct {
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prefix: []const u8,
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pub const Root = union(enum) {
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native: struct {
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prefix: []const u8,
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},
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tar: struct {},
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///
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///
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///
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pub fn joinedPath(root: Root, sequences: []const []const u8) PathError!Path {
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pub fn joinedPath(root: *const Root, sequences: []const []const u8) PathError!Path {
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var path = Path{
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.root = root,
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.buffer = std.mem.zeroes([Path.max]u8),
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@ -609,8 +604,8 @@ pub const SeekOrigin = enum {
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///
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///
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pub fn close(file_access: *FileAccess) void {
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if (!ext.SDL_RWclose(@ptrCast(*ext.SDL_RWops,
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@alignCast(@alignOf(ext.SDL_RWops), file_access)))) {
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if (ext.SDL_RWclose(@ptrCast(*ext.SDL_RWops,
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@alignCast(@alignOf(ext.SDL_RWops), file_access))) != 0) {
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ext.SDL_LogCritical(ext.SDL_LOG_CATEGORY_APPLICATION,
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"Failed to close file - may have been already closed");
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@ -629,21 +624,21 @@ pub fn log(kind: LogKind, message: []const u8) void {
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///
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///
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pub fn open(mode: OpenMode, file_system_path: FileSystem.Path) OpenError!*FileAccess {
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switch (file_system_path.file_system) {
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.data => {
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// TODO: Implement
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switch (file_system_path.root.*) {
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.tar => {
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// TODO: Implement.
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return error.NotFound;
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},
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.user => {
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.native => |native| {
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var path_buffer = std.mem.zeroes([4096]u8);
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var path = stack.Fixed(u8){.buffer = path_buffer[0 .. ]};
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path.pushAll("/home/kayomn/.local/share") catch return error.NotFound;
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path.pushAll(native.prefix) catch return error.NotFound;
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if (file_system_path.write(path.writer())) return error.NotFound;
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return @ptrCast(*FileAccess, ext.SDL_RWFromFile(&path_buffer, switch (mode) {
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return @ptrCast(?*FileAccess, ext.SDL_RWFromFile(&path_buffer, switch (mode) {
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.readonly => "rb",
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.overwrite => "wb",
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.append => "ab",
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@ -689,24 +684,19 @@ pub fn runGraphics(comptime Errors: anytype, comptime run: GraphicsRunner(Errors
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defer ext.SDL_DestroyRenderer(renderer);
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var file_system = FileSystem{
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.user = .{.prefix = create_pref_path: {
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const path = ext.SDL_GetPrefPath("ona", "ona") orelse {
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ext.SDL_LogCritical(ext.SDL_LOG_CATEGORY_APPLICATION,
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"Failed to load user path");
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const user_prefix = ext.SDL_GetPrefPath("ona", "ona") orelse {
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ext.SDL_LogCritical(ext.SDL_LOG_CATEGORY_APPLICATION,
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"Failed to load user path");
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return error.InitFailure;
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};
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break: create_pref_path path[0 .. std.mem.len(path)];
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}},
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.data = .{.prefix = "./"},
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return error.InitFailure;
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};
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defer {
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ext.SDL_free(file_system.user.prefix);
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}
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defer ext.SDL_free(user_prefix);
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var file_system = FileSystem{
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.user = .{.native = .{.prefix = user_prefix[0 .. std.mem.len(user_prefix)]}},
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.data = .{.tar = .{}},
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};
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var event_loop = EventLoop.Implementation.init() catch |err| {
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switch (err) {
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@ -743,5 +733,6 @@ pub fn runGraphics(comptime Errors: anytype, comptime run: GraphicsRunner(Errors
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},
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};
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return run(@ptrCast(*EventLoop, &event_loop), @ptrCast(*GraphicsContext, &graphics_context));
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return run(@ptrCast(*EventLoop, &event_loop), &file_system,
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@ptrCast(*GraphicsContext, &graphics_context));
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}
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