--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/log.h	Tue Feb 04 13:35:52 2020 +0100
@@ -0,0 +1,46 @@
+/*
+ * log.h -- logging routines
+ *
+ * Copyright (c) 2020 David Demelier <markand@malikania.fr>
+ * 
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef PASTER_LOG_H
+#define PASTER_LOG_H
+
+#include <stdarg.h>
+
+enum log_level {
+	LOG_LEVEL_DEBUG,
+	LOG_LEVEL_INFO,
+	LOG_LEVEL_WARNING
+};
+
+void
+log_open(void);
+
+void
+log_write(enum log_level level, const char *fmt, ...);
+
+void
+log_vwrite(enum log_level level, const char *fmt, va_list ap);
+
+#define log_debug(...) log_write(LOG_LEVEL_DEBUG, __VA_ARGS__)
+#define log_warn(...) log_write(LOG_LEVEL_WARNING, __VA_ARGS__)
+#define log_info(...) log_write(LOG_LEVEL_INFO, __VA_ARGS__)
+
+void
+log_finish(void);
+
+#endif /* !PASTER_LOG_H */