initial commit

utils.c

@@ -0,0 +1,47 @@
+/**
+ * Copyright (c) 2025 favewa
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include "ratazana.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+[[gnu::format(printf, 1, 2)]]
+_Noreturn void ratazana_fatal(const char *fmt, ...)
+{
+	va_list args;
+	va_start(args, fmt);
+
+	fprintf(stderr, "Fatal error: ");
+	vfprintf(stderr, fmt, args);
+	fprintf(stderr, "\n");
+	fflush(stderr);
+
+	va_end(args);
+	exit(EXIT_FAILURE);
+}
+
+const char *ratazana_strerror(ratazana_result_t result)
+{
+	switch (result) {
+		case RATAZANA_OK:
+			return "Success";
+		case RATAZANA_ERROR_INVALID_ARG:
+			return "Invalid argument";
+		case RATAZANA_ERROR_IO:
+			return "I/O error";
+		case RATAZANA_ERROR_TIMEOUT:
+			return "Timeout";
+		case RATAZANA_ERROR_NOT_FOUND:
+			return "Device not found";
+		case RATAZANA_ERROR_PROTOCOL:
+			return "Protocol error";
+		case RATAZANA_ERROR_ACCESS:
+			return "Access denied";
+		default:
+			return "Unknown error";
+	}
+}