dont need array

1 files changed, 3 insertions, 1 deletions

diff --git a/src/common.cc b/src/common.cc
index fd2a843..64c462b 100644
--- a/src/common.cc
+++ b/src/common.cc
@@ -25,6 +25,8 @@ typedef intptr_t isize;
 /* intrinsics */
 #define likely(cond) __builtin_expect(!!(cond), 1)
 #define unlikely(cond) __builtin_expect(!!(cond), 0)
+#define containerof(type, member, ptr) \
+    ((type *)((char *)(ptr) - offsetof(type, member)))
 
 /* error handling sort of */
 [[noreturn]] void panic_impl(const char* file, i32 line, const char* fmt, ...) {
@@ -81,7 +83,7 @@ template <typename T>
 bool slice_write(const Slice<T>* slice, FILE* stream) {
   assert_neq(slice, nullptr);
   assert_neq(stream, nullptr);
-  
+
   usize rc = fwrite(slice->ptr, sizeof(T), slice->length, stream);
   if (rc == 0 || slice->size() > rc) return false;
   return true;