libmisc: Write my own assert.h with assert_notreached()

1 files changed, 23 insertions, 0 deletions

diff --git a/libmisc/assert.c b/libmisc/assert.c
new file mode 100644
index 0000000..7817ba3
--- /dev/null
+++ b/libmisc/assert.c
@@ -0,0 +1,23 @@
+/* libmisc/assert.h - More assertions
+ *
+ * Copyright (C) 2024  Luke T. Shumaker <lukeshu@lukeshu.com>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+#include <stdio.h>  /* for fprintf(), stderr */
+#include <stdlib.h> /* for abort() */
+
+#include <libmisc/assert.h>
+
+#ifndef NDEBUG
+__attribute__((__noreturn__)) void
+__assert_msg_fail(const char *expr,
+                  const char *file, unsigned int line, const char *func,
+                  const char *msg) {
+	fprintf(stderr, "error: %s:%u:%s(): assertion \"%s\" failed%s%s\n",
+	        file, line, func,
+	        expr,
+	        msg ? ": " : "", msg);
+	abort();
+}
+#endif