Caleb Gardner
37 lines
1.1 KiB
Zig
37 lines
1.1 KiB
Zig
const std = @import("std");
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const fs = std.fs;
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const Superblock = @import("superblock.zig").Superblock;
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const inode = @import("inode.zig");
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const MetadataReader = @import("metadata_reader.zig").MetadataReader;
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pub const Reader = struct {
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super: Superblock,
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rdr: fs.File,
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root: inode.Inode,
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alloc: std.heap.GeneralPurposeAllocator(.{}),
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pub fn close(self: *Reader) void {
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self.rdr.close();
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_ = self.alloc.deinit();
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}
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};
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pub fn newReader(filename: []const u8) !Reader {
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const file = try std.fs.cwd().openFile(filename, .{});
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errdefer file.close();
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var alloc: std.heap.GeneralPurposeAllocator(.{}) = .init;
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errdefer _ = alloc.deinit();
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const super = try file.reader().readStruct(Superblock);
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try super.valid();
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try file.seekTo(super.inode_table + super.root_inode.block_start);
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var root_reader: MetadataReader = try .init(super.comp, file.reader().any(), alloc.allocator());
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const root_inode = try inode.readInode(root_reader.any(), super.block_size, alloc.allocator());
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return Reader{
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.super = super,
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.rdr = file,
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.root = root_inode,
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.alloc = alloc,
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};
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}
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