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// license:BSD-3-Clause
// copyright-holders:Nathan Woods
/***************************************************************************
fs_coco_rsdos.h
Management of CoCo "RS-DOS" floppy images
***************************************************************************/
#ifndef MAME_FORMATS_FS_COCO_RSDOS_H
#define MAME_FORMATS_FS_COCO_RSDOS_H
#pragma once
#include "fsmgr.h"
#include <optional>
#include <string_view>
namespace fs {
class coco_rsdos_image : public manager_t {
public:
coco_rsdos_image() : manager_t() {}
virtual const char *name() const override;
virtual const char *description() const override;
virtual void enumerate_f(floppy_enumerator &fe, u32 form_factor, const std::vector<u32> &variants) const override;
virtual std::unique_ptr<filesystem_t> mount(fsblk_t &blockdev) const override;
virtual bool can_format() const override;
virtual bool can_read() const override;
virtual bool can_write() const override;
virtual bool has_rsrc() const override;
virtual std::vector<meta_description> file_meta_description() const override;
private:
class impl : public filesystem_t {
public:
class root_dir : public idir_t {
public:
root_dir(impl &i) : m_fs(i) {}
virtual ~root_dir() = default;
virtual void drop_weak_references() override;
virtual meta_data metadata() override;
virtual std::vector<dir_entry> contents() override;
virtual file_t file_get(u64 key) override;
virtual dir_t dir_get(u64 key) override;
private:
impl &m_fs;
};
struct rsdos_dirent
{
char m_filename[11];
u8 m_filetype;
u8 m_asciiflag;
u8 m_first_granule;
u8 m_last_sector_bytes_msb;
u8 m_last_sector_bytes_lsb;
};
struct rsdos_dirent_sector
{
struct
{
rsdos_dirent m_dirent;
u8 m_unused[16];
} m_entries[4];
};
class granule_iterator {
public:
granule_iterator(impl &fs, const rsdos_dirent &dirent);
bool next(u8 &granule, u16 &byte_count);
private:
fsblk_t::block_t m_granule_map;
std::optional<u8> m_current_granule;
u8 m_maximum_granules;
u16 m_last_sector_bytes;
};
class file : public ifile_t {
public:
file(impl &fs, rsdos_dirent &&dirent);
virtual ~file() = default;
virtual void drop_weak_references() override;
virtual meta_data metadata() override;
virtual std::vector<u8> read_all() override;
private:
impl & m_fs;
rsdos_dirent m_dirent;
};
impl(fsblk_t &blockdev);
virtual ~impl() = default;
virtual meta_data metadata() override;
virtual dir_t root() override;
private:
dir_t m_root;
void drop_root_ref();
fsblk_t::block_t read_sector(int track, int sector) const;
u8 maximum_granules() const;
static std::string get_filename_from_dirent(const rsdos_dirent &dirent);
};
static bool validate_filename(std::string_view name);
};
extern const coco_rsdos_image COCO_RSDOS;
} // namespace fs
#endif // MAME_FORMATS_FS_COCO_RSDOS_H
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