portapack-mayhem/firmware/application/file.cpp
Jared Boone 7492984144 Add filesystem directory enumeration.
Borrow API from std::filesystem -- Boost and C++17.
2016-04-20 09:56:35 -07:00

111 lines
2.8 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.
*/
#include "file.hpp"
File::~File() {
close();
}
bool File::open_for_writing(const std::string& file_path) {
const auto open_result = f_open(&f, file_path.c_str(), FA_WRITE | FA_OPEN_ALWAYS);
return (open_result == FR_OK);
}
bool File::open_for_reading(const std::string& file_path) {
const auto open_result = f_open(&f, file_path.c_str(), FA_READ | FA_OPEN_EXISTING);
return (open_result == FR_OK);
}
bool File::open_for_append(const std::string& file_path) {
if( open_for_writing(file_path) ) {
const auto seek_result = f_lseek(&f, f_size(&f));
if( seek_result == FR_OK ) {
return true;
} else {
close();
}
}
return false;
}
bool File::close() {
f_close(&f);
return true;
}
bool File::is_ready() {
return f_error(&f) == 0;
}
bool File::read(void* const data, const size_t bytes_to_read) {
UINT bytes_read = 0;
const auto result = f_read(&f, data, bytes_to_read, &bytes_read);
return (result == FR_OK) && (bytes_read == bytes_to_read);
}
bool File::write(const void* const data, const size_t bytes_to_write) {
UINT bytes_written = 0;
const auto result = f_write(&f, data, bytes_to_write, &bytes_written);
return (result == FR_OK) && (bytes_written == bytes_to_write);
}
bool File::puts(const std::string& string) {
const auto result = f_puts(string.c_str(), &f);
return (result >= 0);
}
bool File::sync() {
const auto result = f_sync(&f);
return (result == FR_OK);
}
namespace std {
namespace filesystem {
directory_iterator::directory_iterator(
const char* path,
const char* wild
) {
impl = std::make_shared<Impl>();
const auto result = f_findfirst(&impl->dir, &impl->filinfo, path, wild);
if( result != FR_OK ) {
impl.reset();
// TODO: Throw exception if/when I enable exceptions...
}
}
directory_iterator& directory_iterator::operator++() {
const auto result = f_findnext(&impl->dir, &impl->filinfo);
if( (result != FR_OK) || (impl->filinfo.fname[0] == 0) ) {
impl.reset();
}
return *this;
}
bool is_regular_file(const file_status s) {
return !(s & AM_DIR);
}
} /* namespace filesystem */
} /* namespace std */