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// license:BSD-3-Clause
// copyright-holders:Olivier Galibert
// Filesystem management code for floppy, hd and cdrom images
#ifndef MAME_FORMATS_FSMGR_H
#define MAME_FORMATS_FSMGR_H
#pragma once
#include "flopimg.h"
#include <variant>
#include <unordered_map>
enum class fs_meta_name {
creation_date,
length,
loading_address,
locked,
sequential,
modification_date,
name,
size_in_blocks,
};
enum class fs_meta_type {
string,
number,
date,
flag,
};
using fs_meta = std::variant<std::string, uint64_t, bool>;
using fs_meta_data = std::unordered_map<fs_meta_name, fs_meta>;
const char *fs_meta_get_name(fs_meta_name name);
std::string fs_meta_to_string(fs_meta_type type, const fs_meta &m);
fs_meta fs_meta_from_string(fs_meta_type type, std::string value);
struct fs_meta_description {
fs_meta_name m_name;
fs_meta_type m_type;
fs_meta m_default;
bool m_ro;
std::function<void (const fs_meta &)> m_validator;
const char *m_tooltip;
fs_meta_description(fs_meta_name name, fs_meta_type type, int def, bool ro, std::function<void (fs_meta)> validator, const char *tooltip) :
m_name(name), m_type(type), m_default(uint64_t(def)), m_ro(ro), m_validator(validator), m_tooltip(tooltip)
{}
template<typename T> fs_meta_description(fs_meta_name name, fs_meta_type type, T def, bool ro, std::function<void (fs_meta)> validator, const char *tooltip) :
m_name(name), m_type(type), m_default(def), m_ro(ro), m_validator(validator), m_tooltip(tooltip)
{}
};
class fsblk_t {
protected:
class iblock_t {
public:
iblock_t(uint32_t size) : m_ref(0), m_weak_ref(0), m_size(size) {}
virtual ~iblock_t() = default;
void ref();
void ref_weak();
void unref();
void unref_weak();
uint32_t size() const { return m_size; }
virtual void drop_weak_references() = 0;
virtual const uint8_t *rodata() = 0;
virtual uint8_t *data() = 0;
uint8_t *offset(const char *function, uint32_t off, uint32_t size);
const uint8_t *rooffset(const char *function, uint32_t off, uint32_t size);
protected:
uint32_t m_ref, m_weak_ref;
uint32_t m_size;
};
public:
class block_t {
public:
block_t(iblock_t *block, bool weak = false) : m_block(block), m_is_weak_ref(weak) {
ref();
}
block_t(const block_t &cref) {
m_block = cref.m_block;
m_is_weak_ref = cref.m_is_weak_ref;
ref();
}
block_t(block_t &&cref) {
m_block = cref.m_block;
m_is_weak_ref = cref.m_is_weak_ref;
cref.m_block = nullptr;
}
~block_t() {
unref();
}
block_t &operator =(const block_t &cref) {
m_block = cref.m_block;
m_is_weak_ref = cref.m_is_weak_ref;
ref();
return *this;
}
block_t &operator =(block_t &&cref) {
m_block = cref.m_block;
m_is_weak_ref = cref.m_is_weak_ref;
cref.m_block = nullptr;
return *this;
}
const uint8_t *rodata() {
return m_block ? m_block->rodata() : nullptr;
}
uint8_t *data() {
return m_block ? m_block->data() : nullptr;
}
void copy(uint32_t offset, const uint8_t *src, uint32_t size);
void fill( uint8_t data);
void fill(uint32_t offset, uint8_t data, uint32_t size);
void wstr(uint32_t offset, const std::string &str);
void w8( uint32_t offset, uint8_t data);
void w16b(uint32_t offset, u16 data);
void w32b(uint32_t offset, uint32_t data);
void w16l(uint32_t offset, u16 data);
void w32l(uint32_t offset, uint32_t data);
std::string rstr(uint32_t offset, uint32_t size);
private:
iblock_t *m_block;
bool m_is_weak_ref;
void ref() {
if(m_block) {
if(m_is_weak_ref)
m_block->ref_weak();
else
m_block->ref();
}
}
void unref() {
if(m_block) {
if(m_is_weak_ref)
m_block->unref_weak();
else
m_block->unref();
}
}
};
fsblk_t() : m_block_size(0) {}
virtual ~fsblk_t() = default;
virtual void set_block_size(uint32_t block_size);
virtual uint32_t block_count() const = 0;
virtual block_t get(uint32_t id) = 0;
virtual void fill(uint8_t data) = 0;
protected:
uint32_t m_block_size;
};
class filesystem_t {
protected:
class idir_t {
public:
virtual ~idir_t();
void ref();
void ref_weak();
void unref();
void unref_weak();
virtual void drop_weak_references();
};
class ifile_t {
public:
virtual ~ifile_t();
void ref();
void ref_weak();
void unref();
void unref_weak();
virtual void drop_weak_references();
};
public:
class dir_t {
public:
dir_t(idir_t *dir, bool weak = false) : m_dir(dir), m_is_weak_ref(weak) {
ref();
}
dir_t(const dir_t &cref) {
m_dir = cref.m_dir;
m_is_weak_ref = cref.m_is_weak_ref;
ref();
}
dir_t(dir_t &&cref) {
m_dir = cref.m_dir;
m_is_weak_ref = cref.m_is_weak_ref;
cref.m_dir = nullptr;
}
~dir_t() {
unref();
}
dir_t &operator =(const dir_t &cref) {
m_dir = cref.m_dir;
m_is_weak_ref = cref.m_is_weak_ref;
ref();
return *this;
}
dir_t &operator =(dir_t &&cref) {
m_dir = cref.m_dir;
m_is_weak_ref = cref.m_is_weak_ref;
cref.m_dir = nullptr;
return *this;
}
private:
idir_t *m_dir;
bool m_is_weak_ref;
void ref() {
if(m_dir) {
if(m_is_weak_ref)
m_dir->ref_weak();
else
m_dir->ref();
}
}
void unref() {
if(m_dir) {
if(m_is_weak_ref)
m_dir->unref_weak();
else
m_dir->unref();
}
}
};
class file_t {
public:
file_t(ifile_t *file, bool weak = false) : m_file(file), m_is_weak_ref(weak) {
ref();
}
file_t(const file_t &cref) {
m_file = cref.m_file;
m_is_weak_ref = cref.m_is_weak_ref;
ref();
}
file_t(file_t &&cref) {
m_file = cref.m_file;
m_is_weak_ref = cref.m_is_weak_ref;
cref.m_file = nullptr;
}
~file_t() {
unref();
}
file_t &operator =(const file_t &cref) {
m_file = cref.m_file;
m_is_weak_ref = cref.m_is_weak_ref;
ref();
return *this;
}
file_t &operator =(file_t &&cref) {
m_file = cref.m_file;
m_is_weak_ref = cref.m_is_weak_ref;
cref.m_file = nullptr;
return *this;
}
private:
ifile_t *m_file;
bool m_is_weak_ref;
void ref() {
if(m_file) {
if(m_is_weak_ref)
m_file->ref_weak();
else
m_file->ref();
}
}
void unref() {
if(m_file) {
if(m_is_weak_ref)
m_file->unref_weak();
else
m_file->unref();
}
}
};
filesystem_t(fsblk_t &blockdev, u32 size) : m_blockdev(blockdev) {
m_blockdev.set_block_size(size);
}
virtual ~filesystem_t() = default;
virtual void format(const fs_meta_data &meta);
virtual fs_meta_data metadata();
virtual dir_t root();
protected:
fsblk_t &m_blockdev;
};
class unformatted_floppy_creator;
class filesystem_manager_t {
public:
struct floppy_enumerator {
virtual ~floppy_enumerator() = default;
virtual void add(const filesystem_manager_t *manager, floppy_format_type type, uint32_t image_size, const char *name, const char *description) = 0;
virtual void add_raw(const char *name, uint32_t key, const char *description) = 0;
};
struct hd_enumerator {
virtual ~hd_enumerator() = default;
virtual void add(const filesystem_manager_t *manager, const char *name, const char *description) = 0;
};
struct cdrom_enumerator {
virtual ~cdrom_enumerator() = default;
virtual void add(const filesystem_manager_t *manager, const char *name, const char *description) = 0;
};
virtual ~filesystem_manager_t() = default;
virtual void enumerate_f(floppy_enumerator &fe, uint32_t form_factor, const std::vector<uint32_t> &variants) const;
virtual void enumerate_h(hd_enumerator &he) const;
virtual void enumerate_c(cdrom_enumerator &ce) const;
virtual bool can_format() const = 0;
virtual bool can_read() const = 0;
virtual bool can_write() const = 0;
virtual bool has_subdirectories() const = 0;
virtual std::vector<fs_meta_description> volume_meta_description() const;
virtual std::vector<fs_meta_description> file_meta_description() const;
virtual std::vector<fs_meta_description> directory_meta_description() const;
// Create a filesystem object from a block device
virtual std::unique_ptr<filesystem_t> mount(fsblk_t &blockdev) const = 0;
protected:
filesystem_manager_t() = default;
static bool has(uint32_t form_factor, const std::vector<uint32_t> &variants, uint32_t ff, uint32_t variant);
static bool has_variant(const std::vector<uint32_t> &variants, uint32_t variant);
};
typedef filesystem_manager_t *(*filesystem_manager_type)();
// this template function creates a stub which constructs a filesystem manager
template<class _FormatClass>
filesystem_manager_t *filesystem_manager_creator()
{
return new _FormatClass();
}
#endif
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