Ebrahim Byagowi | c33e800 | 2020-07-14 19:29:58 +0430 | [diff] [blame] | 1 | /* |
| 2 | * Copyright © 2020 Ebrahim Byagowi |
| 3 | * |
| 4 | * This is part of HarfBuzz, a text shaping library. |
| 5 | * |
| 6 | * Permission is hereby granted, without written agreement and without |
| 7 | * license or royalty fees, to use, copy, modify, and distribute this |
| 8 | * software and its documentation for any purpose, provided that the |
| 9 | * above copyright notice and the following two paragraphs appear in |
| 10 | * all copies of this software. |
| 11 | * |
| 12 | * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
| 13 | * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
| 14 | * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
| 15 | * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
| 16 | * DAMAGE. |
| 17 | * |
| 18 | * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
| 19 | * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| 20 | * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
| 21 | * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
| 22 | * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| 23 | */ |
| 24 | |
| 25 | #include <stdlib.h> |
| 26 | #include <stdio.h> |
| 27 | |
Behdad Esfahbod | 0a5c1c9 | 2022-01-04 14:18:38 -0700 | [diff] [blame] | 28 | #ifdef __cplusplus |
| 29 | extern "C" { |
| 30 | #endif |
| 31 | |
Ebrahim Byagowi | c33e800 | 2020-07-14 19:29:58 +0430 | [diff] [blame] | 32 | int alloc_state = 0; |
| 33 | |
| 34 | __attribute__((no_sanitize("integer"))) |
| 35 | static int fastrand () |
| 36 | { |
| 37 | if (!alloc_state) return 1; |
| 38 | /* Based on https://software.intel.com/content/www/us/en/develop/articles/fast-random-number-generator-on-the-intel-pentiumr-4-processor.html */ |
| 39 | alloc_state = (214013 * alloc_state + 2531011); |
| 40 | return (alloc_state >> 16) & 0x7FFF; |
| 41 | } |
| 42 | |
| 43 | void* hb_malloc_impl (size_t size) |
| 44 | { |
| 45 | return (fastrand () % 16) ? malloc (size) : NULL; |
| 46 | } |
| 47 | |
| 48 | void* hb_calloc_impl (size_t nmemb, size_t size) |
| 49 | { |
| 50 | return (fastrand () % 16) ? calloc (nmemb, size) : NULL; |
| 51 | } |
| 52 | |
| 53 | void* hb_realloc_impl (void *ptr, size_t size) |
| 54 | { |
| 55 | return (fastrand () % 16) ? realloc (ptr, size) : NULL; |
| 56 | } |
| 57 | |
| 58 | void hb_free_impl (void *ptr) |
| 59 | { |
| 60 | return free (ptr); |
| 61 | } |
Behdad Esfahbod | 0a5c1c9 | 2022-01-04 14:18:38 -0700 | [diff] [blame] | 62 | |
| 63 | #ifdef __cplusplus |
| 64 | } |
| 65 | #endif |