/*

 * Copyright (C) 2017 Nikos Mavrogiannopoulos

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

 * DEALINGS IN THE SOFTWARE.

 *

 */

#ifndef MEM_H

#define MEM_H

typedef struct mem_st {

  const uint8_t *data;

  size_t size;

} mem_st;

#define MIN(x, y) ((x) < (y) ? (x) : (y))

static ssize_t mem_push(gnutls_transport_ptr_t tr, const void *data, size_t len)

{

  return len;

}

static ssize_t mem_pull(gnutls_transport_ptr_t tr, void *data, size_t len)

{

  struct mem_st *p = (struct mem_st *)tr;

  if (p->size == 0) {

    return 0;

  }

  len = MIN(len, p->size);

  memcpy(data, p->data, len);

  p->size -= len;

  p->data += len;

  return len;

}

static int mem_pull_timeout(gnutls_transport_ptr_t tr, unsigned int ms)

{

  struct mem_st *p = (struct mem_st *)tr;

  if (p->size > 0)

    return 1; /* available data */

  else

    return 0; /* timeout */

}

#endif