Function diff_delta

delta.h:56–69

* diff_delta: create a delta from source buffer to target buffer * * If max_delta_size is non-zero and the resulting delta is to be larger * than max_delta_size then NULL is returned. On success, a non-NULL * pointer to the buffer with the delta data is returned and *delta_size is * updated with its size. The returned buffer must be freed by the caller. */

 * updated with its size.  The returned buffer must be freed by the caller.
 */
static inline void *
diff_delta(const void *src_buf, unsigned long src_bufsize,
	   const void *trg_buf, unsigned long trg_bufsize,
	   unsigned long *delta_size, unsigned long max_delta_size)
{
	struct delta_index *index = create_delta_index(src_buf, src_bufsize);
	if (index) {
		void *delta = create_delta(index, trg_buf, trg_bufsize,
					   delta_size, max_delta_size);
		free_delta_index(index);
		return delta;
	}
	return NULL;
}

/*
 * patch_delta: recreate target buffer given source buffer and delta data