/* Copyright (c) 2017 Nicira, Inc.

 *

 * 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.

 */

#include <config.h>

#include "ovsdb-session.h"

#include <stdbool.h>

#include <stddef.h>

#include <string.h>

#include "svec.h"

#include "util.h"

#include "uuid.h"

static const char *

next_remote(const char *s)

{

    for (const char *delimiter = strchr(s, ','); delimiter;

         delimiter = strchr(delimiter + 1, ',')) {

        const char *p = delimiter + 1;

        p += strspn(p, " \t");

        size_t n_letters = strspn(p, "abcdefghijklmnopqrstuvwxyz");

        if (n_letters && p[n_letters] == ':') {

            return delimiter;

        }

    }

    return NULL;

}

/* Parses string 's' into comma-delimited substrings and adds each of them into

 * 'remotes'.  If one of the substrings is of the form "cid:<uuid>", fills

 * '*cid' with the UUID (and omits it from 'remotes'), otherwise initializes

 * '*cid' to UUID_ZERO. */

void

ovsdb_session_parse_remote(const char *s,

                           struct svec *remotes, struct uuid *cid)

{

    *cid = UUID_ZERO;

    for (;;) {

        /* Skip white space. */

        s += strspn(s, " \t");

        if (*s == '\0') {

            break;

        }

        /* Find the start of the next remote  */

        const char *delimiter = next_remote(s);

        if (!delimiter) {

            svec_add(remotes, s);

            break;

        }

        svec_add_nocopy(remotes, xmemdup0(s, delimiter - s));

        s = delimiter + 1;

    }

    size_t i;

    for (i = 0; i < remotes->n; i++) {

        const char *name = remotes->names[i];

        struct uuid uuid;

        if (!strncmp(name, "cid:", 4) && uuid_from_string(&uuid, name + 4)) {

            *cid = uuid;

            svec_del(remotes, name);

            break;

        }

    }

}