portapack-mayhem/firmware/application/log_file.cpp

/*
 * 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 "log_file.hpp"

#include "string_format.hpp"

#include "lpc43xx_cpp.hpp"
using namespace lpc43xx;

LogFile::~LogFile() {
	close();
}

bool LogFile::open_for_append(const std::string& file_path) {
	const auto open_result = f_open(&f, file_path.c_str(), FA_WRITE | FA_OPEN_ALWAYS);
	if( open_result == FR_OK ) {
		const auto seek_result = f_lseek(&f, f_size(&f));
		if( seek_result == FR_OK ) {
			return true;
		} else {
			close();
		}
	}

	return false;
}

bool LogFile::close() {
	f_close(&f);
	return true;
}

bool LogFile::is_ready() {
	return !f_error(&f);
}

bool LogFile::write_entry(const rtc::RTC& datetime, const std::string& entry) {
	std::string timestamp = 
		to_string_dec_uint(datetime.year(), 4, '0') +
		to_string_dec_uint(datetime.month(), 2, '0') +
		to_string_dec_uint(datetime.day(), 2, '0') +
		to_string_dec_uint(datetime.hour(), 2, '0') +
		to_string_dec_uint(datetime.minute(), 2, '0') +
		to_string_dec_uint(datetime.second(), 2, '0');

	return write(timestamp + " " + entry + "\r\n");
}

bool LogFile::write(const std::string& message) {
	const auto puts_result = f_puts(message.c_str(), &f);
	const auto sync_result = f_sync(&f);
	return (puts_result >= 0) && (sync_result == FR_OK);
}