Extract LogFile, add (dumb) logging to ERT, AIS apps.

firmware/application/log_file.cpp

@@ -0,0 +1,55 @@
+/*
+ * 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"
+
+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(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);
+}