Finished? inodes

src/inode/dir.zig

@@ -14,8 +14,11 @@ pub const DirInode = packed struct {
 };
 
 const DirIndex = struct {
-
+    offset: u32,
-}
+    block_start: u32,
+    name_size: u32,
+    name: []const u8,
+};
 
 pub const ExtDirInode = packed struct {
     hard_links: u32,

src/inode/file.zig

@@ -0,0 +1,72 @@
+const std = @import("std");
+const io = std.io;
+
+pub const BlockSize = packed struct { size: u23, not_compressed: bool, _: u8 };
+
+pub const FileInode = struct {
+    data_start: u32,
+    frag_idx: u32,
+    frag_offset: u32,
+    size: u32,
+    blocks: []const BlockSize,
+
+    pub fn init(alloc: std.mem.Allocator, rdr: io.AnyReader, block_size: u32) !FileInode {
+        const fixed_buf = [_]u8{0} ** 16;
+        _ = try rdr.readAll(&fixed_buf);
+        const frag_idx = std.mem.bytesToValue(u32, fixed_buf[4..8]);
+        const size = std.mem.bytesToValue(u32, fixed_buf[12..16]);
+        var block_num = size / block_size;
+        if (frag_idx != 0xFFFFFFFF) {
+            block_num += 1;
+        }
+        const blocks = try alloc.alloc(BlockSize, block_num);
+        _ = try rdr.readAll(std.mem.asBytes(blocks));
+        return .{
+            .data_start = std.mem.bytesToValue(u32, fixed_buf[0..4]),
+            .frag_idx = frag_idx,
+            .frag_offset = std.mem.bytesToValue(u32, fixed_buf[8..12]),
+            .size = size,
+            .blocks = blocks,
+        };
+    }
+    pub fn deinit(self: FileInode, alloc: std.mem.Allocator) void {
+        alloc.free(self.blocks);
+    }
+};
+
+pub const ExtFileInode = struct {
+    data_start: u64,
+    size: u64,
+    sparse: u64,
+    hard_links: u32,
+    frag_idx: u32,
+    frag_offset: u32,
+    xattr_idx: u32,
+    blocks: []const BlockSize,
+
+    pub fn init(alloc: std.mem.Allocator, rdr: io.AnyReader, block_size: u32) !ExtFileInode {
+        const fixed_buf = [_]u8{0} ** 40;
+        _ = try rdr.readAll(&fixed_buf);
+        const size = std.mem.bytesToValue(u64, fixed_buf[8..16]);
+        const frag_idx = std.mem.bytesToValue(u32, fixed_buf[28..32]);
+        var block_num = size / block_size;
+        if (frag_idx != 0xFFFFFFFF) {
+            block_num += 1;
+        }
+        const blocks = try alloc.alloc(BlockSize, block_num);
+        _ = try rdr.readAll(std.mem.asBytes(blocks));
+        return .{
+            .data_start = std.mem.bytesToValue(u64, fixed_buf[0..8]),
+            .size = size,
+            .sparse = std.mem.bytesToValue(u64, fixed_buf[16..24]),
+            .hard_links = std.mem.bytesToValue(u32, fixed_buf[24..28]),
+            .frag_idx = frag_idx,
+            .frag_offset = std.mem.bytesToValue(u32, fixed_buf[32..36]),
+            .xattr_idx = std.mem.bytesToValue(u32, fixed_buf[36..40]),
+            .blocks = blocks,
+        };
+    }
+    pub fn deinit(self: ExtFileInode, alloc: std.mem.Allocator) void {
+        alloc.free(self.blocks);
+    }
+};

src/inode/inode.zig

@@ -56,8 +56,41 @@ pub const InodeHeader = packed struct {
 };
 
 pub const Inode = struct {
+    alloc: std.mem.Allocator,
     header: InodeHeader,
-    data: InodeData, //TODO
+    data: InodeData,
 
-    pub fn init(rdr: io.AnyReader) !Inode {}
+    pub fn init(alloc: std.mem.Allocator, rdr: io.AnyReader, block_size: u32) !Inode {
+        const hdr = try rdr.readStruct(InodeHeader);
+        const data: InodeData = switch (hdr.inode_type) {
+            .dir => .{ .dir = try .init(rdr) },
+            .file => .{ .file = try .init(alloc, rdr, block_size) },
+            .sym => .{ .sym = try .init(alloc, rdr) },
+            .block => .{ .block = try .init(rdr) },
+            .char => .{ .char = try .init(rdr) },
+            .fifo => .{ .fifo = try .init(rdr) },
+            .sock => .{ .sock = try .init(rdr) },
+            .ext_dir => .{ .ext_dir = try .init(rdr) },
+            .ext_file => .{ .ext_file = try .init(alloc, rdr, block_size) },
+            .ext_sym => .{ .ext_sym = try .init(alloc, rdr) },
+            .ext_block => .{ .ext_block = try .init(rdr) },
+            .ext_char => .{ .ext_char = try .init(rdr) },
+            .ext_fifo => .{ .ext_fifo = try .init(rdr) },
+            .ext_sock => .{ .ext_sock = try .init(rdr) },
+        };
+        return .{
+            .alloc = alloc,
+            .header = hdr,
+            .data = data,
+        };
+    }
+    pub fn deinit(self: Inode) void {
+        switch (self.data) {
+            .file => |d| d.deinit(self.alloc),
+            .sym => |d| d.deinit(self.alloc),
+            .ext_file => |d| d.deinit(self.alloc),
+            .ext_sym => |d| d.deinit(self.alloc),
+            else => {},
+        }
+    }
 };

src/inode/misc.zig

@@ -0,0 +1,38 @@
+const std = @import("std");
+const io = std.io;
+
+pub const DeviceInode = packed struct {
+    hard_links: u32,
+    device: u32,
+
+    pub fn init(rdr: io.AnyReader) !DeviceInode {
+        return rdr.readStruct(DeviceInode);
+    }
+};
+
+pub const ExtDeviceInode = packed struct {
+    hard_links: u32,
+    device: u32,
+    xattr_idx: u32,
+
+    pub fn init(rdr: io.AnyReader) !ExtDeviceInode {
+        return rdr.readStruct(ExtDeviceInode);
+    }
+};
+
+pub const IPCInode = packed struct {
+    hard_links: u32,
+
+    pub fn init(rdr: io.AnyReader) !IPCInode {
+        return rdr.readStruct(IPCInode);
+    }
+};
+
+pub const ExtIPCInode = packed struct {
+    hard_links: u32,
+    xattr_idx: u32,
+
+    pub fn init(rdr: io.AnyReader) !ExtIPCInode {
+        return rdr.readStruct(ExtIPCInode);
+    }
+};

src/inode/sym.zig

@@ -0,0 +1,48 @@
+const std = @import("std");
+const io = std.io;
+
+pub const SymInode = struct {
+    hard_links: u32,
+    size: u32,
+    target: []const u8,
+
+    pub fn init(alloc: std.mem.Allocator, rdr: io.AnyReader) !SymInode {
+        const fixed_buf = [_]u8{0} ** 8;
+        _ = try rdr.readAll(&fixed_buf);
+        const size = std.mem.bytesToValue(u32, fixed_buf[4..]);
+        const target = try alloc.alloc(u8, size);
+        _ = try rdr.readAll(target);
+        return .{
+            .hard_links = std.mem.bytesToValue(u32, fixed_buf[0..4]),
+            .size = size,
+            .target = target,
+        };
+    }
+    pub fn deinit(self: SymInode, alloc: std.mem.Allocator) void {
+        alloc.free(self.target);
+    }
+};
+
+pub const ExtSymInode = struct {
+    hard_links: u32,
+    size: u32,
+    target: []const u8,
+    xattr_idx: u32,
+
+    pub fn init(alloc: std.mem.Allocator, rdr: io.AnyReader) !ExtSymInode {
+        const fixed_buf = [_]u8{0} ** 8;
+        _ = try rdr.readAll(&fixed_buf);
+        const size = std.mem.bytesToValue(u32, fixed_buf[4..]);
+        const target = try alloc.alloc(u8, size);
+        _ = try rdr.readAll(target);
+        return .{
+            .hard_links = std.mem.bytesToValue(u32, fixed_buf[0..4]),
+            .size = size,
+            .target = target,
+            .xattr_idx = rdr.readInt(u32, std.builtin.Endian.little),
+        };
+    }
+    pub fn deinit(self: ExtSymInode, alloc: std.mem.Allocator) void {
+        alloc.free(self.target);
+    }
+};