1 files changed, 36 insertions, 0 deletions
diff --git a/include/log.h b/include/log.h
new file mode 100644
index 0000000..eaa265a
--- /dev/null
+++ b/include/log.h
@@ -0,0 +1,36 @@
+#ifndef _SWAYBG_LOG_H
+#define _SWAYBG_LOG_H
+
+#include <stdarg.h>
+#include <string.h>
+#include <errno.h>
+
+enum log_importance {
+	LOG_SILENT = 0,
+	LOG_ERROR = 1,
+	LOG_INFO = 2,
+	LOG_DEBUG = 3,
+	LOG_IMPORTANCE_LAST,
+};
+
+void swaybg_log_init(enum log_importance verbosity);
+
+#ifdef __GNUC__
+#define _ATTRIB_PRINTF(start, end) __attribute__((format(printf, start, end)))
+#else
+#define _ATTRIB_PRINTF(start, end)
+#endif
+
+void _swaybg_log(enum log_importance verbosity, const char *format, ...)
+	_ATTRIB_PRINTF(2, 3);
+
+const char *_swaybg_strip_path(const char *filepath);
+
+#define swaybg_log(verb, fmt, ...) \
+	_swaybg_log(verb, "[%s:%d] " fmt, _swaybg_strip_path(__FILE__), \
+			__LINE__, ##__VA_ARGS__)
+
+#define swaybg_log_errno(verb, fmt, ...) \
+	swaybg_log(verb, fmt ": %s", ##__VA_ARGS__, strerror(errno))
+
+#endif