Add utility to calculate allocation size for array

src/base/array/array.c

@@ -200,12 +200,16 @@ void _array_clear(GenericArray array, u64 item_size) {
 	header->count = 0;
 }
 
+u64 _array_alloc_size(u64 capacity, u64 item_size) {
+	return sizeof(ArrayHeader) + item_size * capacity;
+}
+
 GenericArray _array_alloc_capacity(const Allocator *allocator, u64 capacity, u64 item_size, b8 fill) {
 	wapp_runtime_assert(allocator != NULL, "`allocator` should not be NULL");
 
 	GenericArray output = NULL;
 
-	u64 allocation_size = sizeof(ArrayHeader) + item_size * capacity;
+	u64 allocation_size = _array_alloc_size(capacity, item_size);
 	ArrayHeader *header = wapp_mem_allocator_alloc(allocator, allocation_size);
 	if (!header) {
 		goto RETURN_ARRAY_ALLOC;

src/base/array/array.h

@@ -166,6 +166,7 @@ typedef Str8  *Str8Array;
 #define wapp_array_clear(TYPE, ARRAY)                                                              \
 	(_array_clear((GenericArray)ARRAY,                                                               \
 	             sizeof(TYPE)))
+#define wapp_array_alloc_size(TYPE, CAPACITY) _array_alloc_size(CAPACITY, sizeof(TYPE))
 
 typedef struct header ArrayHeader;
 struct header {
@@ -189,6 +190,7 @@ GenericArray _array_extend_alloc(const Allocator *allocator, GenericArray dst, c
 GenericArray _array_copy_alloc(const Allocator *allocator, GenericArray dst, const GenericArray src, u64 item_size);
 void        *_array_pop(GenericArray array, u64 item_size);
 void         _array_clear(GenericArray array, u64 item_size);
+u64          _array_alloc_size(u64 capacity, u64 item_size);
 GenericArray _array_alloc_capacity(const Allocator *allocator, u64 capacity, u64 item_size, b8 fill);
 
 #ifdef WAPP_PLATFORM_CPP