More work on stuff

src/archive.zig

@@ -1,6 +1,10 @@
 const std = @import("std");
 const Io = std.Io;
 
+const File = @import("file.zig");
+const Inode = @import("inode.zig");
+const Util = @import("util.zig");
+
 const Archive = @This();
 
 map: Io.File.MemoryMap,
@@ -14,7 +18,7 @@ pub fn open(io: Io, file: Io.File, offset: u64) !Archive {
         .protection = .{ .read = true },
     });
 
-    var super: Superblock = std.mem.bytesToValue(Superblock, map.memory[0..@sizeOf(Superblock)]);
+    var super = Util.readValue(Superblock, map.memory[0..@sizeOf(Superblock)]);
     try super.check();
 
     return .{
@@ -23,6 +27,18 @@ pub fn open(io: Io, file: Io.File, offset: u64) !Archive {
         .super = super,
     };
 }
+pub fn close(self: *Archive, io: Io) void {
+    self.map.destroy(io);
+}
+
+pub fn root(self: *Archive) !File {
+    _ = self;
+    return error.TODO;
+}
+pub fn extract(self: *Archive) !void {
+    _ = self;
+    return error.TODO;
+}
 
 // Superblock
 
@@ -40,7 +56,7 @@ pub const Superblock = extern struct {
     id_count: u16,
     version_major: u16,
     version_minor: u16,
-    root_inode_ref: u64, // TODO: Change to inode reference packed struct.
+    root_inode_ref: Inode.Reference, // TODO: Change to inode reference packed struct.
     size: u64,
     id_table_start: u64,
     xattr_table_start: u64,

src/file.zig

@@ -0,0 +1,16 @@
+const std = @import("std");
+const Io = std.Io;
+
+const Inode = @import("inode.zig");
+
+const File = @This();
+
+alloc: std.mem.Allocator,
+
+name: []const u8,
+inode: Inode,
+
+pub fn close(self: File) void {
+    self.inode.deinit(self.alloc);
+    self.alloc.free(self.name);
+}

src/inode.zig

@@ -6,6 +6,16 @@ const Inode = @This();
 header: Header,
 data: Data,
 
+pub fn deinit(self: Inode, alloc: std.mem.Allocator) void {
+    switch (self.data) {
+        .file => |f| alloc.free(f.blocks),
+        .ext_file => |f| alloc.free(f.blocks),
+        .symlink => |s| alloc.free(s.target),
+        .ext_symlink => |s| alloc.free(s.target),
+        else => {},
+    }
+}
+
 // Types
 
 pub const Reference = packed struct(u64) {
@@ -76,11 +86,19 @@ pub const ExtDir = extern struct {
     xattr_idx: u32,
 };
 
-pub const File = struct {};
+pub const File = struct {
-pub const ExtFile = struct {};
+    blocks: []u64,
+};
+pub const ExtFile = struct {
+    blocks: []u64,
+};
 
-pub const Symlink = struct {};
+pub const Symlink = struct {
-pub const ExtSymlink = struct {};
+    target: []const u8,
+};
+pub const ExtSymlink = struct {
+    target: []const u8,
+};
 
 pub const Dev = extern struct {};
 pub const ExtDev = extern struct {};

src/root.zig

@@ -2,5 +2,5 @@ pub const Archive = @import("archive.zig");
 pub const Options = @import("options.zig");
 
 test {
-    @import("std").testing.refAllDecls(Archive);
+    @import("std").testing.refAllDecls(@import("tests.zig"));
 }

src/tests.zig

@@ -0,0 +1,20 @@
+const std = @import("std");
+const Io = std.Io;
+
+var alloc = std.testing.allocator;
+var io = std.testing.io;
+
+const Archive = @import("archive.zig");
+
+const TEST_ARCHIVE = "testing/LinuxPATest.sfs";
+
+test "Open" {
+    var archive_file = try Io.Dir.cwd().openFile(io, TEST_ARCHIVE, .{});
+    defer archive_file.close(io);
+
+    var arc: Archive = try .open(io, archive_file, 0);
+    defer arc.close(io);
+
+    var root = try arc.root();
+    defer root.close();
+}

src/util.zig

@@ -0,0 +1,16 @@
+const std = @import("std");
+const builtin = @import("builtin");
+
+pub fn readValue(comptime T: type, bytes: []u8) T {
+    var res = std.mem.bytesToValue(T, bytes);
+    if (builtin.cpu.arch.endian() != .little) {
+        switch (@typeInfo(T)) {
+            .@"enum" => res = std.mem.nativeToLittle(@typeInfo(T).@"enum".tag_type, res),
+            .@"struct" => std.mem.byteSwapAllFields(T, &res),
+            .int => res = std.mem.nativeToLittle(T, res),
+            .array => std.mem.byteSwapAllElements(@typeInfo(T).array.child, res),
+            else => unreachable,
+        }
+    }
+    return res;
+}