Squashed 'external/toxcore/c-toxcore/' content from commit 67badf69

git-subtree-dir: external/toxcore/c-toxcore
git-subtree-split: 67badf69416a74e74f6d7eb51dd96f37282b8455

toxcore/attributes.h

@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright © 2022 The TokTok team.
+ */
+
+/**
+ * printf and nonnull attributes for GCC/Clang and Cimple.
+ */
+#ifndef C_TOXCORE_TOXCORE_ATTRIBUTES_H
+#define C_TOXCORE_TOXCORE_ATTRIBUTES_H
+
+/* No declarations here. */
+
+//!TOKSTYLE-
+
+#ifdef __GNUC__
+#define GNU_PRINTF(f, a) __attribute__((__format__(__printf__, f, a)))
+#else
+#define GNU_PRINTF(f, a)
+#endif
+
+#if defined(__GNUC__) && defined(_DEBUG) && !defined(__OPTIMIZE__)
+#define non_null(...) __attribute__((__nonnull__(__VA_ARGS__)))
+#else
+#define non_null(...)
+#endif
+
+#define nullable(...)
+
+//!TOKSTYLE+
+
+#endif // C_TOXCORE_TOXCORE_ATTRIBUTES_H