1 files changed, 24 insertions, 0 deletions

diff --git a/src/util.h b/src/util.h
new file mode 100644
index 0000000..7ede6fd
--- /dev/null
+++ b/src/util.h
@@ -0,0 +1,24 @@
+#pragma once
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static void
+error(const char *msg, ...)
+{
+        va_list ap;
+
+        va_start(ap, msg);
+        fprintf(stderr, "Error: ");
+        vfprintf(stderr, msg, ap);
+        va_end(ap);
+        fprintf(stderr, "\n");
+        exit(EXIT_FAILURE);
+}
+
+#define ERROR(msg) error(msg " in \"%s()\" (%s:%d)", __func__, __FILE__, __LINE__)
+
+#ifndef NELEM
+#       define NELEM(x) (sizeof(x) / sizeof(x[0])) /* NOLINT */
+#endif