AGS: Import of fresh codebase

engines/ags/engine/debugging/log_file.cpp

@@ -0,0 +1,84 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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
+ * of the License, 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; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "ags/engine/debugging/log_file.h"
+#include "ags/shared/util/file.h"
+#include "ags/shared/util/stream.h"
+
+namespace AGS3 {
+namespace AGS {
+namespace Engine {
+
+using namespace Shared;
+
+LogFile::LogFile()
+	: _openMode(kLogFile_Overwrite) {
+}
+
+void LogFile::PrintMessage(const DebugMessage &msg) {
+	if (!_file.get()) {
+		if (_filePath.IsEmpty())
+			return;
+		_file.reset(File::OpenFile(_filePath, _openMode == kLogFile_Append ? Shared::kFile_Create : Shared::kFile_CreateAlways,
+		                           Shared::kFile_Write));
+		if (!_file) {
+			Debug::Printf("Unable to write log to '%s'.", _filePath.GetCStr());
+			_filePath = "";
+			return;
+		}
+	}
+
+	if (!msg.GroupName.IsEmpty()) {
+		_file->Write(msg.GroupName, msg.GroupName.GetLength());
+		_file->Write(" : ", 3);
+	}
+	_file->Write(msg.Text, msg.Text.GetLength());
+	_file->WriteInt8('\n');
+	// We should flush after every write to the log; this will make writing
+	// bit slower, but will increase the chances that all latest output
+	// will get to the disk in case of program crash.
+	_file->Flush();
+}
+
+bool LogFile::OpenFile(const String &file_path, OpenMode open_mode) {
+	CloseFile();
+
+	_filePath = file_path;
+	_openMode = open_mode;
+	if (open_mode == OpenMode::kLogFile_OverwriteAtFirstMessage) {
+		return File::TestWriteFile(_filePath);
+	} else {
+		_file.reset(File::OpenFile(file_path,
+		                           open_mode == kLogFile_Append ? Shared::kFile_Create : Shared::kFile_CreateAlways,
+		                           Shared::kFile_Write));
+		return _file.get() != nullptr;
+	}
+}
+
+void LogFile::CloseFile() {
+	_file.reset();
+	_filePath.Empty();
+}
+
+} // namespace Engine
+} // namespace AGS
+} // namespace AGS3