portapack-mayhem/firmware/application/file.hpp
2016-05-01 11:29:44 -07:00

133 lines
3.2 KiB
C++

/*
* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
*
* This file is part of PortaPack.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef __FILE_H__
#define __FILE_H__
#include "ff.h"
#include <cstddef>
#include <string>
#include <array>
#include <memory>
#include <iterator>
class File {
public:
enum openmode {
app = 0x100,
binary = 0x200,
in = FA_READ,
out = FA_WRITE,
trunc = FA_CREATE_ALWAYS,
ate = FA_OPEN_ALWAYS,
};
File(const std::string& filename, openmode mode);
~File();
bool is_open() const {
return f_error(&f) == 0;
}
bool read(void* const data, const size_t bytes_to_read);
bool write(const void* const data, const size_t bytes_to_write);
uint64_t seek(const uint64_t new_position);
template<size_t N>
bool write(const std::array<uint8_t, N>& data) {
return write(data.data(), N);
}
bool puts(const std::string& string);
bool sync();
private:
FIL f;
};
inline constexpr File::openmode operator|(File::openmode a, File::openmode b) {
return File::openmode(static_cast<int>(a) | static_cast<int>(b));
}
std::string next_filename_stem_matching_pattern(const std::string& filename_stem_pattern);
namespace std {
namespace filesystem {
using file_status = BYTE;
struct directory_entry : public FILINFO {
file_status status() const {
return fattrib;
}
const std::string path() const noexcept { return fname; };
};
class directory_iterator {
struct Impl {
DIR dir;
directory_entry filinfo;
~Impl() {
f_closedir(&dir);
}
};
std::shared_ptr<Impl> impl;
friend bool operator!=(const directory_iterator& lhs, const directory_iterator& rhs);
public:
using difference_type = std::ptrdiff_t;
using value_type = directory_entry;
using pointer = const directory_entry*;
using reference = const directory_entry&;
using iterator_category = std::input_iterator_tag;
directory_iterator() noexcept { };
directory_iterator(const char* path, const char* wild);
~directory_iterator() { }
directory_iterator& operator++();
reference operator*() const {
// TODO: Exception or assert if impl == nullptr.
return impl->filinfo;
}
};
inline const directory_iterator& begin(const directory_iterator& iter) noexcept { return iter; };
inline directory_iterator end(const directory_iterator&) noexcept { return { }; };
inline bool operator!=(const directory_iterator& lhs, const directory_iterator& rhs) { return lhs.impl != rhs.impl; };
bool is_regular_file(const file_status s);
} /* namespace filesystem */
} /* namespace std */
#endif/*__FILE_H__*/