libBLOC

diff --git a/assert.h b/assert.h
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--- /dev/null
+++ b/assert.h
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+/*
+ * Copyright (C) 2023 Barry
+ *
+ * This file is part of Barry's Little Objects in C Library (libBLOC).
+ *
+ * libBLOC is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later
+ * version.
+ *
+ * libBLOC is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTIBILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * libBLOC.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef ASSERT_H
+#define ASSERT_H
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#define ASSERT(c) ({ \
+	if (__builtin_expect(!(c),0)) { \
+		dprintf(STDERR_FILENO, "Assertion failed (%s:%d): %s\n", \
+		        __FILE__, __LINE__, #c); \
+		abort(); \
+	} \
+	c; \
+})
+
+#endif