str.c

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/* -*- C -*- */
/*
 * Copyright (c) 2013-2020 Seagate Technology LLC and/or its Affiliates
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * For any questions about this software or licensing,
 * please email opensource@seagate.com or cortx-questions@seagate.com.
 *
 */


#ifndef __KERNEL__
#include <string.h>             /* strlen */
#else
#include <linux/string.h>       /* strlen */
#endif

#include "lib/memory.h" /* m0_alloc */
#include "lib/misc.h"           /* ergo, ARRAY_SIZE */

#include "motr/magic.h" /* M0_NET_TEST_STR_MAGIC */

#include "net/test/str.h"

struct net_test_str_len {
        uint64_t ntsl_magic;
        size_t   ntsl_len;
};

TYPE_DESCR(net_test_str_len) = {
        FIELD_DESCR(struct net_test_str_len, ntsl_magic),
        FIELD_DESCR(struct net_test_str_len, ntsl_len),
};

m0_bcount_t m0_net_test_str_serialize(enum m0_net_test_serialize_op op,
                                      char **str,
                                      struct m0_bufvec *bv,
                                      m0_bcount_t bv_offset)
{
        struct net_test_str_len str_len;
        m0_bcount_t             len;
        m0_bcount_t             len_total;

        M0_PRE(op == M0_NET_TEST_SERIALIZE || op == M0_NET_TEST_DESERIALIZE);
        M0_PRE(str != NULL);
        M0_PRE(ergo(op == M0_NET_TEST_SERIALIZE, *str != NULL));

        if (op == M0_NET_TEST_SERIALIZE) {
                str_len.ntsl_len = strlen(*str) + 1;
                str_len.ntsl_magic = M0_NET_TEST_STR_MAGIC;
        }
        len = m0_net_test_serialize(op, &str_len,
                                    USE_TYPE_DESCR(net_test_str_len),
                                    bv, bv_offset);
        len_total = net_test_len_accumulate(0, len);
        if (len_total != 0) {
                if (op == M0_NET_TEST_DESERIALIZE) {
                        if (str_len.ntsl_magic != M0_NET_TEST_STR_MAGIC)
                                return 0;
                        *str = m0_alloc(str_len.ntsl_len);
                        if (*str == NULL)
                                return 0;
                }
                len = m0_net_test_serialize_data(op, *str, str_len.ntsl_len,
                                                 true,
                                                 bv, bv_offset + len_total);
                len_total = net_test_len_accumulate(len_total, len);
        };

        return len_total;
}

/*
 *  Local variables:
 *  c-indentation-style: "K&R"
 *  c-basic-offset: 8
 *  tab-width: 8
 *  fill-column: 79
 *  scroll-step: 1
 *  End:
 */