/*

 * Copyright (C) 2001-2017 Artifex Software, Inc.

 * All Rights Reserved.

 *

 * This software is provided AS-IS with no warranty, either express or

 * implied.

 *

 * This software is distributed under license and may not be copied,

 * modified or distributed except as expressly authorized under the terms

 * of the license contained in the file LICENSE in this distribution.

 *

 * Refer to licensing information at http://www.artifex.com or contact

 * Artifex Software, Inc., 7 Mt. Lassen Drive - Suite A-134, San Rafael,

 * CA 94903, U.S.A., +1(415)492-9861, for further information.

 */

#if !defined(SHARE_JPEG) || SHARE_JPEG==0

#include "jinclude.h"

#include "jpeglib.h"

#include "jmemsys.h"

#include "jerror.h"

#include "jmemcust.h"

GLOBAL(void *)

jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)

{

  jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo);

  return (void *) (cmem->j_mem_get_small)(cinfo, sizeofobject);

}

GLOBAL(void)

jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)

{

  jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo);

  (cmem->j_mem_free_small)(cinfo, object, sizeofobject);

}

/*

 * "Large" objects are treated the same as "small" ones.

 * NB: although we include FAR keywords in the routine declarations,

 * this file won't actually work in 80x86 small/medium model; at least,

 * you probably won't be able to process useful-size images in only 64KB.

 */

GLOBAL(void FAR *)

jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)

{

  jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo);

  return (void *) (cmem->j_mem_get_large)(cinfo, sizeofobject);

}

GLOBAL(void)

jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)

{

  jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo);

  (cmem->j_mem_free_large)(cinfo, object, sizeofobject);

}

/*

 * This routine computes the total memory space available for allocation.

 * Here we always say, "we got all you want bud!"

 */

GLOBAL(long)

jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,

    long max_bytes_needed, long already_allocated)

{

  jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo);

  long ret = max_bytes_needed;

  if (cmem->j_mem_avail)

    ret = (cmem->j_mem_avail)(cinfo);

  return ret;

}

/*

 * Backing store (temporary file) management.

 * Since jpeg_mem_available always promised the moon,

 * this should never be called and we can just error out.

 */

GLOBAL(void)

jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,

    long total_bytes_needed)

{

  jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo);

  if (cmem->j_mem_open_backing_store) {

    (cmem->j_mem_open_backing_store)(cinfo, info, total_bytes_needed);

  }

  else

    ERREXIT(cinfo, JERR_NO_BACKING_STORE);

}

/*

 * These routines take care of any system-dependent initialization and

 * cleanup required. Here, there isn't any.

 */

GLOBAL(long)

jpeg_mem_init (j_common_ptr cinfo)

{

  jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo);

  long ret = 0;

  if (cmem->j_mem_init)

    ret = (cmem->j_mem_init)(cinfo);

  return ret;

}

GLOBAL(void)

jpeg_mem_term (j_common_ptr cinfo)

{

  jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo);

  if (cmem->j_mem_term)

    (cmem->j_mem_term)(cinfo);

}

GLOBAL(jpeg_cust_mem_data *)

jpeg_cust_mem_init(jpeg_cust_mem_data *custm, void *priv,

    j_custmem_init_ptr init,

    j_custmem_term_ptr term,

    j_custmem_avail_ptr avail,

    j_custmem_get_small_ptr get_small,

    j_custmem_free_small_ptr free_small,

    j_cust_mem_get_large_ptr get_large,

    j_custmem_free_large_ptr free_large,

    j_custmem_open_backing_store_ptr open_backing_store)

{

  jpeg_cust_mem_data *lcustm = NULL;

  /* We need at least the following for a viable memory manager */

  if (get_small && free_small && get_large && free_large)

  {

    lcustm = custm;

    lcustm->priv = priv;

    lcustm->j_mem_init = init;

    lcustm->j_mem_term = term;

    lcustm->j_mem_avail = avail;

    lcustm->j_mem_get_small = get_small;

    lcustm->j_mem_free_small = free_small;

    lcustm->j_mem_get_large = get_large;

    lcustm->j_mem_free_large = free_large;

    lcustm->j_mem_open_backing_store = open_backing_store;

  }

  return lcustm;

}

#endif /* !defined(SHARE_JPEG) || SHARE_JPEG==0 */