Function compress_zlib

dpdk/app/test/test_compressdev.c:422–573

}

static int
compress_zlib(struct rte_comp_op *op,
		const struct rte_comp_xform *xform, int mem_level)
{
	z_stream stream;
	int zlib_flush;
	int strategy, window_bits, comp_level;
	int ret = TEST_FAILED;
	uint8_t *single_src_buf = NULL;
	uint8_t *single_dst_buf = NULL;

	/* initialize zlib stream */
	stream.zalloc = Z_NULL;
	stream.zfree = Z_NULL;
	stream.opaque = Z_NULL;

	if (xform->compress.deflate.huffman == RTE_COMP_HUFFMAN_FIXED)
		strategy = Z_FIXED;
	else
		strategy = Z_DEFAULT_STRATEGY;

	/*
	 * Window bits is the base two logarithm of the window size (in bytes).
	 * When doing raw DEFLATE, this number will be negative.
	 */
	window_bits = -(xform->compress.window_size);
	if (xform->compress.chksum == RTE_COMP_CHECKSUM_ADLER32)
		window_bits *= -1;
	else if (xform->compress.chksum == RTE_COMP_CHECKSUM_CRC32)
		window_bits = ZLIB_CRC_CHECKSUM_WINDOW_BITS;

	comp_level = xform->compress.level;

	if (comp_level != RTE_COMP_LEVEL_NONE)
		ret = deflateInit2(&stream, comp_level, Z_DEFLATED,
			window_bits, mem_level, strategy);
	else
		ret = deflateInit(&stream, Z_NO_COMPRESSION);

	if (ret != Z_OK) {
		printf("Zlib deflate could not be initialized\n");
		goto exit;
	}

	/* Assuming stateless operation */
	/* SGL Input */
	if (op->m_src->nb_segs > 1) {
		single_src_buf = rte_malloc(NULL,
				rte_pktmbuf_pkt_len(op->m_src), 0);
		if (single_src_buf == NULL) {
			RTE_LOG(ERR, USER1, "Buffer could not be allocated\n");
			goto exit;
		}

		if (rte_pktmbuf_read(op->m_src, op->src.offset,
					rte_pktmbuf_pkt_len(op->m_src) -
					op->src.offset,
					single_src_buf) == NULL) {