Add log.hpp

src/log.hpp

@@ -0,0 +1,52 @@
+#include <iostream>
+#include <sstream>
+#include <string>
+
+#define LOG_LEVEL_DEBUG 0
+#define LOG_LEVEL_INFO 1
+#define LOG_LEVEL_WARN 2
+#define LOG_LEVEL_ERROR 3
+#define LOG_LEVEL_NONE 4
+
+#ifndef LOG_LEVEL
+#define LOG_LEVEL LOG_LEVEL_NONE
+#endif
+
+#define LOG(level, message)                     \
+	do {                                        \
+		std::ostringstream oss;                 \
+		oss << "[" << level << "] " << message; \
+		std::cout << oss.str() << std::endl;    \
+	} while (0)
+
+#if LOG_LEVEL <= LOG_LEVEL_DEBUG
+#define D(message) LOG("DEBUG", message)
+#else
+#define D(message) \
+	do {           \
+	} while (0)
+#endif
+
+#if LOG_LEVEL <= LOG_LEVEL_INFO
+#define I(message) LOG("INFO", message)
+#else
+#define I(message) \
+	do {           \
+	} while (0)
+#endif
+
+#if LOG_LEVEL <= LOG_LEVEL_WARN
+#define W(message) LOG("WARN", message)
+#else
+#define W(message) \
+	do {           \
+	} while (0)
+#endif
+
+#if LOG_LEVEL <= LOG_LEVEL_ERROR
+#define E(message) LOG("ERROR", message)
+#else
+#define E(message) \
+	do {           \
+	} while (0)
+#endif