Dynamic Array in C

darray.h

#ifndef __D_ARRAY_H__
#define __D_ARRAY_H__

#include <stdlib.h>

#define da_init(name, type) \
	typedef struct {\
		type *items;\
		size_t count;\
		size_t capacity;\
	} name;\

#define da_append(xs, x) \
	do {\
		if (xs.capacity == xs.count) {\
			if (xs.capacity == 0) xs.capacity = 128;\
			else xs.capacity *= 2;\
			xs.items = realloc(xs.items, xs.capacity * sizeof(xs.items));\
		}\
		xs.items[xs.count++] = x;\
	} while (0);

#define da_free(xs) \
	do {\
		free(xs.items);\
	} while(0);

#endif /* __D_ARRAY_H__ */