1 /*
2 __ __ _
3 ___\ \/ /_ __ __ _| |_
4 / _ \\ /| '_ \ / _` | __|
5 | __// \| |_) | (_| | |_
6 \___/_/\_\ .__/ \__,_|\__|
7 |_| XML parser
8
9 Copyright (c) 2017-2026 Sebastian Pipping <sebastian@pipping.org>
10 Copyright (c) 2026 Matthew Fernandez <matthew.fernandez@gmail.com>
11 Licensed under the MIT license:
12
13 Permission is hereby granted, free of charge, to any person obtaining
14 a copy of this software and associated documentation files (the
15 "Software"), to deal in the Software without restriction, including
16 without limitation the rights to use, copy, modify, merge, publish,
17 distribute, sublicense, and/or sell copies of the Software, and to permit
18 persons to whom the Software is furnished to do so, subject to the
19 following conditions:
20
21 The above copyright notice and this permission notice shall be included
22 in all copies or substantial portions of the Software.
23
24 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
27 NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
28 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
29 OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
30 USE OR OTHER DEALINGS IN THE SOFTWARE.
31 */
32
33 #include "random_arc4random.h"
34
35 #if ! defined(_DEFAULT_SOURCE)
36 # define _DEFAULT_SOURCE 1 /* for glibc */
37 #endif
38
39 #include <stdint.h> // for uint32_t
40 #include <stdlib.h> // for arc4random
41 #include <string.h> // for memcpy
42
43 void
writeRandomBytes_arc4random(void * target,size_t count)44 writeRandomBytes_arc4random(void *target, size_t count) {
45 size_t bytesWrittenTotal = 0;
46
47 while (bytesWrittenTotal < count) {
48 const uint32_t random32 = arc4random();
49
50 size_t toUse = count - bytesWrittenTotal;
51 if (toUse > sizeof(random32))
52 toUse = sizeof(random32);
53 memcpy((char *)target + bytesWrittenTotal, &random32, toUse);
54 bytesWrittenTotal += toUse;
55 }
56 }
57