Add the files

1 files changed, 16 insertions, 0 deletions

diff --git a/src/common/arrutil.h b/src/common/arrutil.h
new file mode 100644
index 0000000..83a49d6
--- /dev/null
+++ b/src/common/arrutil.h
@@ -0,0 +1,16 @@
+#pragma once
+
+#include <assert.h>
+
+#ifdef __has_builtin
+    #if !__cplusplus && FF_SUPPORTS_COUNT_OF
+        #define ARRAY_SIZE(x) _Countof(x)
+    #elif __has_builtin(__is_array)
+        #define ARRAY_SIZE(x) ({ static_assert(__is_array(__typeof__(x)), "Must be an array"); (uint32_t) (sizeof(x) / sizeof(*(x))); })
+    #elif __has_builtin(__builtin_types_compatible_p)
+        #define ARRAY_SIZE(x) ({ static_assert(!__builtin_types_compatible_p(__typeof__(x), __typeof__(&*(x))), "Must not be a pointer"); (uint32_t) (sizeof(x) / sizeof(*(x))); })
+    #endif
+#endif
+#ifndef ARRAY_SIZE
+    #define ARRAY_SIZE(x) ((uint32_t) (sizeof(x) / sizeof(*(x))))
+#endif