rename hashmap to map

map.c

@@ -0,0 +1,61 @@
+#include "cig.h"
+
+static inline int mapping_cap(int capacity) {
+	return capacity * 2;
+}
+
+void *map_create_func(
+	map_create_func_args_t args
+) {
+
+	const size_t cap_of_index_arr =
+		sizeof(int) * mapping_cap(args.initial_capacity);
+	const size_t INC = ALIGN_OF(int);
+	const size_t SIZE = args.itemsize * args.initial_capacity;
+	const size_t cap_of_items_arr = (SIZE + INC - 1) / INC;
+	const size_t bytes =
+		sizeof(map_header_t) + cap_of_items_arr + cap_of_index_arr;
+
+	map_header_t *header =
+		allocator_alloc_func(
+			args.allocator,
+			bytes,
+			args.file,
+			args.line
+		);
+
+	header->n_items = 0;
+	header->capacity = args.initial_capacity;
+	header->itemsize = args.itemsize;
+	header->keysize = args.keysize;
+	header->allocator = args.allocator;
+	header->hash = args.hash;
+	header->equals = args.equals;
+	header->mapping_arr = (int*) &header->bytes[cap_of_items_arr];
+	header->mapping_capacity = mapping_cap(args.initial_capacity);
+
+	for ( int i = 0; i < header->mapping_capacity; i++ ) {
+		header->mapping_arr[i] = -1;
+	}
+
+	return header->bytes;
+}
+
+void map_grow(void *this) {
+}
+
+int map_len(void *this) {
+	if (this == NULL) {
+		return 0;
+	}
+	map_header_t *header = PTR_FROM_FIELD_PTR(map_header_t, bytes, this);
+	return header->n_items;
+}
+
+int map_cap(void *this) {
+	if (this == NULL) {
+		return 0;
+	}
+	map_header_t *header = PTR_FROM_FIELD_PTR(map_header_t, bytes, this);
+	return header->capacity;
+}