Initial implementation of seatd and libseat

include/log.h

@@ -0,0 +1,51 @@
+#ifndef _LOG_H
+#define _LOG_H
+
+#include "compiler.h"
+#include <stdarg.h>
+
+enum libseat_log_level {
+	LIBSEAT_SILENT = 0,
+	LIBSEAT_ERROR = 1,
+	LIBSEAT_INFO = 2,
+	LIBSEAT_DEBUG = 3,
+	LIBSEAT_LOG_LEVEL_LAST,
+};
+
+void libseat_log_init(enum libseat_log_level level);
+
+void _libseat_logf(enum libseat_log_level level, const char *fmt, ...) ATTRIB_PRINTF(2, 3);
+
+#ifdef LIBSEAT_REL_SRC_DIR
+#define _LIBSEAT_FILENAME ((const char *)__FILE__ + sizeof(LIBSEAT_REL_SRC_DIR) - 1)
+#else
+#define _LIBSEAT_FILENAME __FILE__
+#endif
+
+#define log_infof(fmt, ...)                                                                    \
+	_libseat_logf(LIBSEAT_INFO, "[%s:%d] %s: " fmt, _LIBSEAT_FILENAME, __LINE__, __func__, \
+		      ##__VA_ARGS__)
+
+#define log_info(str) \
+	_libseat_logf(LIBSEAT_INFO, "[%s:%d] %s: %s", _LIBSEAT_FILENAME, __LINE__, __func__, str)
+
+#define log_errorf(fmt, ...)                                                                    \
+	_libseat_logf(LIBSEAT_ERROR, "[%s:%d] %s: " fmt, _LIBSEAT_FILENAME, __LINE__, __func__, \
+		      ##__VA_ARGS__)
+
+#define log_error(str) \
+	_libseat_logf(LIBSEAT_ERROR, "[%s:%d] %s: %s", _LIBSEAT_FILENAME, __LINE__, __func__, str)
+
+#ifdef DEBUG
+#define log_debugf(fmt, ...)                                                                    \
+	_libseat_logf(LIBSEAT_DEBUG, "[%s:%d] %s: " fmt, _LIBSEAT_FILENAME, __LINE__, __func__, \
+		      ##__VA_ARGS__)
+
+#define log_debug(str) \
+	_libseat_logf(LIBSEAT_DEBUG, "[%s:%d] %s: %s", _LIBSEAT_FILENAME, __LINE__, __func__, str)
+#else
+#define log_debugf(fmt, ...)
+#define log_debug(str)
+#endif
+
+#endif