/*

 * Copyright © 2020  Ebrahim Byagowi

 *

 *  This is part of HarfBuzz, a text shaping library.

 *

 * Permission is hereby granted, without written agreement and without

 * license or royalty fees, to use, copy, modify, and distribute this

 * software and its documentation for any purpose, provided that the

 * above copyright notice and the following two paragraphs appear in

 * all copies of this software.

 *

 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR

 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES

 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN

 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH

 * DAMAGE.

 *

 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,

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

 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS

 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO

 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

 */

#include <stdlib.h>

#include <stdio.h>

#ifdef __cplusplus

extern "C" {

#endif

int alloc_state = 0;

__attribute__((no_sanitize("integer")))

static int fastrand ()

{

  if (!alloc_state) return 1;

  /* Based on https://software.intel.com/content/www/us/en/develop/articles/fast-random-number-generator-on-the-intel-pentiumr-4-processor.html */

  alloc_state = (214013 * alloc_state + 2531011);

  return (alloc_state >> 16) & 0x7FFF;

}

void* hb_malloc_impl (size_t size)

{

  return (fastrand () % 16) ? malloc (size) : NULL;

}

void* hb_calloc_impl (size_t nmemb, size_t size)

{

  return (fastrand () % 16) ? calloc (nmemb, size) : NULL;

}

void* hb_realloc_impl (void *ptr, size_t size)

{

  return (fastrand () % 16) ? realloc (ptr, size) : NULL;

}

void  hb_free_impl (void *ptr)

{

  return free (ptr);

}

#ifdef __cplusplus

}

#endif