Function pktmbuf_write

dpdk/app/test/test_cryptodev.h:116–151

* Write (spread) data from buffer to mbuf data * * @param mbuf * Destination mbuf * @param offset * Start offset in mbuf * @param len * Number of bytes to copy * @param buffer * Continuous source buffer */

 *   Continuous source buffer
 */
static inline void
pktmbuf_write(struct rte_mbuf *mbuf, int offset, int len, const uint8_t *buffer)
{
	int n = len;
	int l;
	struct rte_mbuf *m;
	char *dst;

	for (m = mbuf; (m != NULL) && (offset > m->data_len); m = m->next)
		offset -= m->data_len;

	l = m->data_len - offset;

	/* copy data from first segment */
	dst = rte_pktmbuf_mtod_offset(m, char *, offset);
	if (len <= l) {
		rte_memcpy(dst, buffer, len);
		return;
	}

	rte_memcpy(dst, buffer, l);
	buffer += l;
	n -= l;

	for (m = m->next; (m != NULL) && (n > 0); m = m->next) {
		dst = rte_pktmbuf_mtod(m, char *);
		l = m->data_len;
		if (n < l) {
			rte_memcpy(dst, buffer, n);
			return;
		}
		rte_memcpy(dst, buffer, l);
		buffer += l;
		n -= l;
	}
}

static inline uint8_t *
pktmbuf_mtod_offset(struct rte_mbuf *mbuf, int offset) {