/*

 * Copyright (c) 2014-2019 Sippy Software, Inc., http://www.sippysoft.com

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 */

#include <assert.h>

#include <string.h>

#include <stddef.h>

#include <stdlib.h>

#include "rtpp_types.h"

#include "rtpp_debug.h"

#include "rtpp_mallocs.h"

#include "rtpp_refcnt.h"

#include "rtpp_wi.h"

#include "rtpp_wi_data.h"

struct rtpp_wi_data {

   struct rtpp_wi pub;

   size_t data_len;

   char data[0];

};

struct rtpp_wi *

rtpp_wi_malloc_data(void *dataptr, size_t datalen)

{

    struct rtpp_wi_data *wipp;

    wipp = rtpp_rmalloc(sizeof(struct rtpp_wi_data) + datalen, PVT_RCOFFS(wipp));

    if (wipp == NULL) {

        return (NULL);

    }

    *wipp = (const struct rtpp_wi_data) {

        .pub.wi_type = RTPP_WI_TYPE_DATA,

        .pub.rcnt = wipp->pub.rcnt

    };

    if (datalen > 0) {

        wipp->data_len = datalen;

        memcpy(wipp->data, dataptr, datalen);

    }

    return (&(wipp->pub));

}

struct rtpp_wi *

rtpp_wi_malloc_udata(void **dataptr, size_t datalen)

{

    struct rtpp_wi_data *wipp;

    wipp = rtpp_rmalloc(sizeof(struct rtpp_wi_data) + datalen, PVT_RCOFFS(wipp));

    if (wipp == NULL) {

        return (NULL);

    }

    *wipp = (const struct rtpp_wi_data) {

        .pub.wi_type = RTPP_WI_TYPE_DATA,

        .pub.rcnt = wipp->pub.rcnt

    };

    if (datalen > 0) {

        wipp->data_len = datalen;

        *dataptr = wipp->data;

    }

    return (&(wipp->pub));

}

void *

rtpp_wi_data_get_ptr(struct rtpp_wi *wi, size_t min_len, size_t max_len)

{

    struct rtpp_wi_data *wipp;

    RTPP_DBG_ASSERT(wi->wi_type == RTPP_WI_TYPE_DATA);

    PUB2PVT(wi, wipp);

    RTPP_DBG_ASSERT(wipp->data_len >= min_len);

    RTPP_DBG_ASSERT(max_len == 0 || wipp->data_len <= max_len);

    return(wipp->data);

}