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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 "timeconv.h"
#include <variant>
#include <unordered_map>
#include <functional>
enum class fs_meta_name {
basic,
creation_date,
length,
loading_address,
locked,
modification_date,
name,
os_minimum_version,
os_version,
rsrc_length,
sequential,
size_in_blocks,
};
enum class fs_meta_type {
date,
flag,
number,
string,
};
enum class fs_dir_entry_type {
dir,
file,
system_file,
};
class fs_meta {
public:
static std::string to_string(fs_meta_type type, const fs_meta &m);
static fs_meta from_string(fs_meta_type type, std::string value);
fs_meta() { value = false; }
fs_meta(std::string str) { value = str; }
fs_meta(bool b) { value = b; }
fs_meta(int32_t num) { value = uint64_t(num); }
fs_meta(uint32_t num) { value = uint64_t(num); }
fs_meta(int64_t num) { value = uint64_t(num); }
fs_meta(uint64_t num) { value = num; }
fs_meta(util::arbitrary_datetime dt) { value = dt; }
util::arbitrary_datetime as_date() const { return *std::get_if<util::arbitrary_datetime>(&value); }
bool as_flag() const { return *std::get_if<bool>(&value); }
uint64_t as_number() const { return *std::get_if<uint64_t>(&value); }
std::string as_string() const { return *std::get_if<std::string>(&value); }
private:
std::variant<std::string, uint64_t, bool, util::arbitrary_datetime> value;
};
class fs_meta_data {
public:
std::unordered_map<fs_meta_name, fs_meta> meta;
static const char *entry_name(fs_meta_name name);
bool has(fs_meta_name name) const { return meta.find(name) != meta.end(); }
bool empty() const { return meta.empty(); }
void set(fs_meta_name name, const fs_meta &val) { meta[name] = val; }
void set(fs_meta_name name, std::string str) { set(name, fs_meta(str)); }
void set(fs_meta_name name, bool b) { set(name, fs_meta(b)); }
void set(fs_meta_name name, int32_t num) { set(name, fs_meta(num)); }
void set(fs_meta_name name, uint32_t num) { set(name, fs_meta(num)); }
void set(fs_meta_name name, int64_t num) { set(name, fs_meta(num)); }
void set(fs_meta_name name, uint64_t num) { set(name, fs_meta(num)); }
void set(fs_meta_name name, util::arbitrary_datetime dt) { set(name, fs_meta(dt)); }
void set_now(fs_meta_name name) { set(name, fs_meta(util::arbitrary_datetime::now())); }
fs_meta get(fs_meta_name name) const { auto i = meta.find(name); if(i == meta.end()) fatalerror("Entry %s not found\n", entry_name(name)); else return i->second; }
util::arbitrary_datetime get_date(fs_meta_name name, util::arbitrary_datetime def = util::arbitrary_datetime::now()) const { auto i = meta.find(name); if(i == meta.end()) return def; else return i->second.as_date(); }
bool get_flag(fs_meta_name name, bool def = false) const { auto i = meta.find(name); if(i == meta.end()) return def; else return i->second.as_flag(); }
uint64_t get_number(fs_meta_name name, uint64_t def = 0) const { auto i = meta.find(name); if(i == meta.end()) return def; else return i->second.as_number(); }
std::string get_string(fs_meta_name name, std::string def = "") const { auto i = meta.find(name); if(i == meta.end()) return def; else return i->second.as_string(); }
};
template<typename T> class fs_refcounted_outer {
public:
fs_refcounted_outer(bool weak) : m_object(nullptr), m_is_weak_ref(weak) {}
fs_refcounted_outer(T *object, bool weak) : m_object(object), m_is_weak_ref(weak) {
ref();
}
fs_refcounted_outer(const fs_refcounted_outer &cref) {
m_object = cref.m_object;
m_is_weak_ref = cref.m_is_weak_ref;
ref();
}
fs_refcounted_outer(fs_refcounted_outer &&cref) {
m_object = cref.m_object;
m_is_weak_ref = cref.m_is_weak_ref;
cref.m_object = nullptr;
}
~fs_refcounted_outer() {
unref();
}
fs_refcounted_outer<T> &operator =(T *dir) {
if(m_object != dir) {
unref();
m_object = dir;
ref();
}
return *this;
}
fs_refcounted_outer<T> &operator =(const fs_refcounted_outer<T> &cref) {
if(m_object != cref.m_object) {
unref();
m_object = cref.m_object;
ref();
}
return *this;
}
fs_refcounted_outer<T> &operator =(fs_refcounted_outer<T> &&cref) {
if(m_object != cref.m_object) {
unref();
m_object = cref.m_object;
ref();
} else if(m_is_weak_ref != cref.m_is_weak_ref) {
ref();
cref.unref();
m_object = cref.m_object; // In case the object got deleted (when going from strong ref to weak on the last strong)
}
cref.m_object = nullptr;
return *this;
}
operator bool() const { return m_object != nullptr; }
protected:
T *m_object;
bool m_is_weak_ref;
private:
void ref() {
if(m_object) {
if(m_is_weak_ref)
m_object->ref_weak();
else
m_object->ref();
}
}
void unref() {
if(m_object) {
bool del = m_is_weak_ref ? m_object->unref_weak() : m_object->unref();
if(del)
m_object = nullptr;
}
}
};
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 fs_refcounted_inner {
public:
fs_refcounted_inner() : m_ref(0), m_weak_ref(0) {}
virtual ~fs_refcounted_inner() = default;
void ref();
void ref_weak();
bool unref();
bool unref_weak();
virtual void drop_weak_references() = 0;
public:
uint32_t m_ref, m_weak_ref;
};
struct fs_dir_entry {
std::string m_name;
fs_dir_entry_type m_type;
uint64_t m_key;
fs_dir_entry(const std::string &name, fs_dir_entry_type type, uint64_t key) : m_name(name), m_type(type), m_key(key) {}
};
class fsblk_t {
protected:
class iblock_t : public fs_refcounted_inner {
public:
iblock_t(uint32_t size) : fs_refcounted_inner(), m_size(size) {}
virtual ~iblock_t() = default;
uint32_t size() const { return m_size; }
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_size;
};
public:
class block_t : public fs_refcounted_outer<iblock_t> {
public:
block_t(bool weak = false) : fs_refcounted_outer<iblock_t>(weak) {}
block_t(iblock_t *block, bool weak = true) : fs_refcounted_outer(block, weak) {}
virtual ~block_t() = default;
block_t strong() { return block_t(m_object, false); }
block_t weak() { return block_t(m_object, true); }
const uint8_t *rodata() { return m_object->rodata(); }
uint8_t *data() { return m_object->data(); }
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, uint16_t data);
void w24b(uint32_t offset, uint32_t data);
void w32b(uint32_t offset, uint32_t data);
void w16l(uint32_t offset, uint16_t data);
void w24l(uint32_t offset, uint32_t data);
void w32l(uint32_t offset, uint32_t data);
std::string rstr(uint32_t offset, uint32_t size);
uint8_t r8( uint32_t offset);
uint16_t r16b(uint32_t offset);
uint32_t r24b(uint32_t offset);
uint32_t r32b(uint32_t offset);
uint16_t r16l(uint32_t offset);
uint32_t r24l(uint32_t offset);
uint32_t r32l(uint32_t offset);
};
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 {
public:
class dir_t;
class file_t;
protected:
class idir_t : public fs_refcounted_inner {
public:
idir_t() : fs_refcounted_inner() {}
virtual ~idir_t() = default;
virtual fs_meta_data metadata() = 0;
virtual void metadata_change(const fs_meta_data &info);
virtual std::vector<fs_dir_entry> contents() = 0;
virtual file_t file_get(uint64_t key) = 0;
virtual dir_t dir_get(uint64_t key) = 0;
virtual file_t file_create(const fs_meta_data &info);
virtual void file_delete(uint64_t key);
};
class ifile_t : public fs_refcounted_inner {
public:
ifile_t() : fs_refcounted_inner() {}
virtual ~ifile_t() = default;
virtual fs_meta_data metadata() = 0;
virtual void metadata_change(const fs_meta_data &info);
virtual std::vector<u8> read_all() = 0;
virtual void replace(const std::vector<u8> &data);
virtual std::vector<u8> rsrc_read_all();
virtual void rsrc_replace(const std::vector<u8> &data);
};
public:
class dir_t : public fs_refcounted_outer<idir_t> {
public:
dir_t(bool weak = false) : fs_refcounted_outer<idir_t>(weak) {}
dir_t(idir_t *dir, bool weak = true) : fs_refcounted_outer(dir, weak) {}
virtual ~dir_t() = default;
dir_t strong() { return dir_t(m_object, false); }
dir_t weak() { return dir_t(m_object, true); }
fs_meta_data metadata() { return m_object->metadata(); }
void metadata_change(const fs_meta_data &info) { m_object->metadata_change(info); }
std::vector<fs_dir_entry> contents() { return m_object->contents(); }
file_t file_get(uint64_t key) { return m_object->file_get(key); }
dir_t dir_get(uint64_t key) { return m_object->dir_get(key); }
file_t file_create(const fs_meta_data &info) { return m_object->file_create(info); }
void file_delete(uint64_t key) { m_object->file_delete(key); }
};
class file_t : public fs_refcounted_outer<ifile_t> {
public:
file_t(bool weak = false) : fs_refcounted_outer<ifile_t>(weak) {}
file_t(ifile_t *file, bool weak = true) : fs_refcounted_outer(file, weak) {}
virtual ~file_t() = default;
file_t strong() { return file_t(m_object, false); }
file_t weak() { return file_t(m_object, true); }
fs_meta_data metadata() { return m_object->metadata(); }
void metadata_change(const fs_meta_data &info) { m_object->metadata_change(info); }
std::vector<u8> read_all() { return m_object->read_all(); }
void replace(const std::vector<u8> &data) { m_object->replace(data); }
std::vector<u8> rsrc_read_all() { return m_object->rsrc_read_all(); }
void rsrc_replace(const std::vector<u8> &data) { m_object->rsrc_replace(data); }
};
filesystem_t(fsblk_t &blockdev, u32 size) : m_blockdev(blockdev) {
m_blockdev.set_block_size(size);
}
virtual ~filesystem_t() = default;
virtual dir_t root();
virtual void format(const fs_meta_data &meta);
virtual fs_meta_data metadata();
virtual void metadata_change(const fs_meta_data &info);
static void copy(uint8_t *p, const uint8_t *src, uint32_t size);
static void fill(uint8_t *p, uint8_t data, uint32_t size);
static void wstr(uint8_t *p, const std::string &str);
static void w8( uint8_t *p, uint8_t data);
static void w16b(uint8_t *p, uint16_t data);
static void w24b(uint8_t *p, uint32_t data);
static void w32b(uint8_t *p, uint32_t data);
static void w16l(uint8_t *p, uint16_t data);
static void w24l(uint8_t *p, uint32_t data);
static void w32l(uint8_t *p, uint32_t data);
static std::string rstr(const uint8_t *p, uint32_t size);
static uint8_t r8( const uint8_t *p);
static uint16_t r16b(const uint8_t *p);
static uint32_t r24b(const uint8_t *p);
static uint32_t r32b(const uint8_t *p);
static uint16_t r16l(const uint8_t *p);
static uint32_t r24l(const uint8_t *p);
static uint32_t r32l(const uint8_t *p);
static std::string trim_end_spaces(const std::string &str);
protected:
fsblk_t &m_blockdev;
};
class unformatted_floppy_creator;
class filesystem_manager_t {
public:
struct floppy_enumerator {
virtual ~floppy_enumerator() = default;
virtual void add(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 const char *name() const = 0;
virtual const char *description() const = 0;
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_rsrc() const = 0;
virtual char directory_separator() const;
bool has_subdirectories() const { return directory_separator() != 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);
};
#endif
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