a little bit of this. a little bit of that (hashmap stuff)

cig.h

@@ -9,7 +9,8 @@
 #include <string.h>
 
 typedef union any_align { char c; int i; long l; long long ll; float f; double d; void *p; long double ld; } any_align_t;
-#define MAX_ALIGN ((size_t) sizeof(any_align_t))
+#define ALIGN_OF(TYPE) ((size_t)(&((struct{char c; TYPE t;}*) 0)->t))
+#define MAX_ALIGN (ALIGN_OF(any_align_t))
 #define KB (1024)
 #define MB (KB * KB)
 #define GB (KB * KB * KB)

hashmap.c

@@ -1,20 +1,22 @@
 #include "cig.h"
 
+static inline int mapping_cap(int capacity) {
+	return capacity * 2;
+}
+
 void *hashmap_create_func(
 	hashmap_create_func_args_t args
 ) {
-	size_t size_of_index_arr = sizeof(int) * args.initial_capacity * 2;
-	size_t INC = sizeof(any_align_t);
+
+  size_t size_of_index_arr = sizeof(int) * mapping_cap(args.initial_capacity);
+  size_t INC = ALIGN_OF(int);
   size_t SIZE = args.itemsize * args.initial_capacity;
   size_t size_of_items_arr = (SIZE + INC - 1) / INC;
-	size_t bytes = sizeof(hashmap_header_t) + size_of_items_arr + size_of_index_arr;
+  size_t bytes =
+      sizeof(hashmap_header_t) + size_of_items_arr + size_of_index_arr;
 
-	hashmap_header_t *header = allocator_alloc_func(
-		args.allocator,
-		bytes,
-		args.file,
-		args.line
-	);
+  hashmap_header_t *header =
+      allocator_alloc_func(args.allocator, bytes, args.file, args.line);
 
   header->n_items = 0;
   header->capacity = args.initial_capacity;
@@ -26,3 +28,7 @@ void *hashmap_create_func(
 
   return header->bytes;
 }
+
+int *hashmap_get_mapping_arr(hashmap_header_t *this) {
+	// TODO
+}