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Diffstat (limited to 'src/lib/formats/fs_coco_rsdos.h')
-rw-r--r-- | src/lib/formats/fs_coco_rsdos.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/src/lib/formats/fs_coco_rsdos.h b/src/lib/formats/fs_coco_rsdos.h new file mode 100644 index 00000000000..e02a5a831f4 --- /dev/null +++ b/src/lib/formats/fs_coco_rsdos.h @@ -0,0 +1,125 @@ +// 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 |