Caleb Gardner
58 lines
2.0 KiB
Zig
58 lines
2.0 KiB
Zig
const std = @import("std");
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pub const FileInode = struct {
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start: u32,
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frag_index: u32,
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frag_block_offset: u32,
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size: u32,
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block_sizes: []const u32,
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};
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pub fn readFileInode(rdr: std.io.AnyReader, block_size: u32, alloc: std.mem.Allocator) !FileInode {
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var out = FileInode{
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.start = try rdr.readInt(u32, std.builtin.Endian.little),
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.frag_index = try rdr.readInt(u32, std.builtin.Endian.little),
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.frag_block_offset = try rdr.readInt(u32, std.builtin.Endian.little),
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.size = try rdr.readInt(u32, std.builtin.Endian.little),
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.block_sizes = undefined,
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};
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var block_num = out.size / block_size;
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if (out.frag_index != 0xFFFFFFFF) {
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block_num += 1;
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}
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out.block_sizes = try alloc.alloc(u32, block_num);
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_ = try rdr.readAll(std.mem.asBytes(&out.block_sizes));
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return out;
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}
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pub const ExtFileInode = struct {
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start: u64,
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size: u64,
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sparse: u64,
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hard_links: u32,
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frag_index: u32,
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frag_block_offset: u32,
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xattr_index: u32,
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block_sizes: []const u32,
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};
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pub fn readExtFileInode(rdr: std.io.AnyReader, block_size: u32, alloc: std.mem.Allocator) !ExtFileInode {
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var out = ExtFileInode{
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.start = try rdr.readInt(u64, std.builtin.Endian.little),
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.size = try rdr.readInt(u64, std.builtin.Endian.little),
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.sparse = try rdr.readInt(u64, std.builtin.Endian.little),
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.hard_links = try rdr.readInt(u32, std.builtin.Endian.little),
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.frag_index = try rdr.readInt(u32, std.builtin.Endian.little),
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.frag_block_offset = try rdr.readInt(u32, std.builtin.Endian.little),
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.xattr_index = try rdr.readInt(u32, std.builtin.Endian.little),
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.block_sizes = undefined,
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};
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var block_num = out.size / block_size;
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if (out.frag_index != 0xFFFFFFFF and out.size % block_size != 0) {
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block_num += 1;
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}
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out.block_sizes = try alloc.alloc(u32, block_num);
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_ = try rdr.readAll(std.mem.asBytes(&out.block_sizes));
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return out;
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}
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