1 files changed, 58 insertions, 0 deletions
diff --git a/include/log.h b/include/log.h
new file mode 100644
index 0000000..2be35ee
--- /dev/null
+++ b/include/log.h
@@ -0,0 +1,58 @@
+#ifndef REVELA_LOG_H
+#define REVELA_LOG_H
+
+#include <errno.h>
+#include <string.h>
+
+enum log_level {
+	LOG_SILENT,
+	LOG_FATAL,
+	LOG_ERROR,
+	LOG_INFO,
+	LOG_DETAIL,
+	LOG_DEBUG,
+};
+
+#ifdef DEBUG
+static const char *log_level_names[] = {
+	"",
+	"FATAL",
+	"ERROR",
+	"INFO",
+	"DETAIL",
+	"DEBUG",
+};
+#endif
+
+void log_set_verbosity(enum log_level);
+
+void log_printf(enum log_level, const char *restrict fmt, ...);
+
+#ifdef DEBUG
+#define log_print(v, fmt, ...) \
+	log_printf(v, "[%s] %s:%d " fmt, log_level_names[v], \
+			__FILE__, __LINE__, ##__VA_ARGS__)
+#else
+#define log_print(v, fmt, ...) \
+	log_printf(v, fmt, ##__VA_ARGS__)
+#endif
+
+#ifdef DEBUG
+#define log_printl(v, fmt, ...) \
+	log_printf(v, "[%s] %s:%d " fmt "\n", log_level_names[v], \
+			__FILE__, __LINE__, ##__VA_ARGS__)
+#else
+#define log_printl(v, fmt, ...) \
+	log_printf(v, fmt "\n", ##__VA_ARGS__)
+#endif
+
+#ifdef DEBUG
+#define log_printl_errno(v, fmt, ...) \
+	log_printf(v, "[%s] %s:%d " fmt ": %s\n", log_level_names[v], \
+			__FILE__, __LINE__, ##__VA_ARGS__, strerror(errno))
+#else
+#define log_printl_errno(v, fmt, ...) \
+	log_printf(v, fmt ": %s\n", ##__VA_ARGS__, strerror(errno))
+#endif
+
+#endif