1 files changed, 161 insertions, 0 deletions
diff --git a/src/core/common/Logger.cpp b/src/core/common/Logger.cpp
new file mode 100644
index 0000000..17f55a6
--- /dev/null
+++ b/src/core/common/Logger.cpp
@@ -0,0 +1,161 @@
+/*
+    Ousía
+    Copyright (C) 2014, 2015  Benjamin Paaßen, Andreas Stöckel
+
+    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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <iostream>
+#include <sstream>
+
+#include "Logger.hpp"
+
+namespace ousia {
+
+/* Class Logger */
+
+void Logger::log(Severity severity, const std::string &msg,
+                 const std::string &file, int line, int column)
+{
+	// Copy the current severity level
+	if (static_cast<int>(severity) > static_cast<int>(maxEncounteredSeverity)) {
+		maxEncounteredSeverity = severity;
+	}
+
+	// Call the actual log message function if the severity is larger or equal
+	// to the minimum severity
+	if (static_cast<int>(severity) >= static_cast<int>(minSeverity)) {
+		process(Message{severity, msg, file, line, column});
+	}
+}
+
+unsigned int Logger::pushFilename(const std::string &name)
+{
+	filenameStack.push(name);
+	return filenameStack.size();
+}
+
+unsigned int Logger::popFilename()
+{
+	filenameStack.pop();
+	return filenameStack.size();
+}
+
+void Logger::unwindFilenameStack(unsigned int pos)
+{
+	while (filenameStack.size() > pos && !filenameStack.empty()) {
+		filenameStack.pop();
+	}
+}
+
+/* Class TerminalLogger */
+
+/**
+ * Small class used internally for formated terminal output using ANSI/VT100
+ * escape codes on supported terminals.
+ *
+ * TODO: Deactivate if using windows or use the corresponding API function.
+ */
+class Terminal {
+private:
+	/**
+	 * If set to false, no control codes are generated.
+	 */
+	bool active;
+
+public:
+	static const int BLACK = 30;
+	static const int RED = 31;
+	static const int GREEN = 32;
+	static const int YELLOW = 33;
+	static const int BLUE = 34;
+	static const int MAGENTA = 35;
+	static const int CYAN = 36;
+	static const int WHITE = 37;
+
+	Terminal(bool active) : active(active) {}
+
+	std::string color(int color, bool bright = true) const
+	{
+		if (!active) {
+			return std::string{};
+		}
+		std::stringstream ss;
+		ss << "\x1b[";
+		if (bright) {
+			ss << "1;";
+		}
+		ss << color << "m";
+		return ss.str();
+	}
+
+	std::string reset() const
+	{
+		if (!active) {
+			return std::string{};
+		}
+		return "\x1b[0m";
+	}
+};
+
+void TerminalLogger::process(const Message &msg)
+{
+	Terminal t(useColor);
+
+	// Print the file name
+	if (msg.hasFile()) {
+		os << t.color(Terminal::WHITE, true) << msg.file << t.reset();
+	}
+
+	// Print line and column number
+	if (msg.hasLine()) {
+		if (msg.hasFile()) {
+			os << ':';
+		}
+		os << t.color(Terminal::WHITE, true) << msg.line
+		   << t.reset();
+		if (msg.hasColumn()) {
+			os << ':' << msg.column;
+		}
+	}
+
+	// Print the optional seperator
+	if (msg.hasFile() || msg.hasLine()) {
+		os << ": ";
+	}
+
+	// Print the severity
+	switch (msg.severity) {
+		case Severity::DEBUG:
+			break;
+		case Severity::NOTE:
+			os << t.color(Terminal::CYAN, true) << "note: ";
+			break;
+		case Severity::WARNING:
+			os << t.color(Terminal::MAGENTA, true) << "warning: ";
+			break;
+		case Severity::ERROR:
+			os << t.color(Terminal::RED, true) << "error: ";
+			break;
+		case Severity::FATAL_ERROR:
+			os << t.color(Terminal::RED, true) << "fatal: ";
+			break;
+	}
+	os << t.reset();
+
+	// Print the actual message
+	os << msg.msg << std::endl;
+}
+}
+