Add heap data structure

engine/breeze/utils/heap.h

@@ -0,0 +1,28 @@
+#ifndef BREEZE_HEAP_H
+#define BREEZE_HEAP_H
+
+#include "../defines.h"
+
+void *_bzHeapNew(i32 startCapacity, i32 stride, i32 weightOffset);
+void _bzHeapFree(void *heap);
+
+i32 _bzHeapSize(void *heap);
+bool _bzHeapIsEmpty(void *heap);
+i32 _bzHeapPop(void *heap);
+void _bzHeapPush(void *heap);
+i32 _bzHeapPushTmpIdx(void *heap);
+
+#define bzHeapNew(T, n) (T *) ((T *)_bzHeapNew((n), sizeof(T), offsetof(T, weight)))
+#define bzHeapFree(heap) _bzHeapFree((void *) (heap))
+
+#define bzHeapSize(heap) _bzHeapSize((void *) (heap))
+#define bzHeapIsEmpty(heap) _bzHeapIsEmpty((void *) (heap))
+#define bzHeapPop(heap) ((heap)[_bzHeapPop((void *) (heap))])
+#define bzHeapPush(heap, item) do {             \
+    void *h = (void *) (heap);                  \
+    (heap)[_bzHeapPushTmpIdx(h)] = (item);      \
+    _bzHeapPush(h);                             \
+} while(0)
+
+
+#endif //BREEZE_HEAP_H