mirror of
https://github.com/TomHarte/CLK.git
synced 2024-12-12 08:30:05 +00:00
73 lines
1.7 KiB
C++
73 lines
1.7 KiB
C++
//
|
|
// FAT.hpp
|
|
// Clock Signal
|
|
//
|
|
// Created by Thomas Harte on 02/07/2021.
|
|
// Copyright © 2021 Thomas Harte. All rights reserved.
|
|
//
|
|
|
|
#pragma once
|
|
|
|
#include "../Disk.hpp"
|
|
|
|
#include <cstdint>
|
|
#include <optional>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
namespace Storage::Disk::FAT {
|
|
|
|
struct File {
|
|
std::string name;
|
|
std::string extension;
|
|
uint8_t attributes = 0;
|
|
uint16_t time = 0; // TODO: offer time/date decoders.
|
|
uint16_t date = 0;
|
|
uint16_t starting_cluster = 0;
|
|
uint32_t size = 0;
|
|
|
|
enum Attribute: uint8_t {
|
|
ReadOnly = (1 << 0),
|
|
Hidden = (1 << 1),
|
|
System = (1 << 2),
|
|
VolumeLabel = (1 << 3),
|
|
Directory = (1 << 4),
|
|
Archive = (1 << 5),
|
|
};
|
|
};
|
|
|
|
using Directory = std::vector<File>;
|
|
|
|
struct Volume {
|
|
uint16_t bytes_per_sector = 0;
|
|
uint8_t sectors_per_cluster = 0;
|
|
uint16_t reserved_sectors = 0;
|
|
uint8_t fat_copies = 0;
|
|
uint16_t total_sectors = 0;
|
|
uint16_t sectors_per_fat = 0;
|
|
uint16_t sectors_per_track = 0;
|
|
uint16_t head_count = 0;
|
|
uint16_t hidden_sectors = 0;
|
|
bool correct_signature = false;
|
|
int first_data_sector = 0;
|
|
|
|
std::vector<uint16_t> fat;
|
|
Directory root_directory;
|
|
|
|
struct CHS {
|
|
int cylinder;
|
|
int head;
|
|
int sector;
|
|
};
|
|
/// @returns a direct sector -> CHS address translation.
|
|
CHS chs_for_sector(int sector) const;
|
|
/// @returns the CHS address for the numbered cluster within the data area.
|
|
int sector_for_cluster(uint16_t cluster) const;
|
|
};
|
|
|
|
std::optional<Volume> GetVolume(const std::shared_ptr<Storage::Disk::Disk> &disk);
|
|
std::optional<std::vector<uint8_t>> GetFile(const std::shared_ptr<Storage::Disk::Disk> &disk, const Volume &volume, const File &file);
|
|
std::optional<Directory> GetDirectory(const std::shared_ptr<Storage::Disk::Disk> &disk, const Volume &volume, const File &file);
|
|
|
|
}
|