1 // RUN: %clangxx -O0 -g %s -o %t && %run %t 2>&1 | FileCheck %s
2 //
3 // UNSUPPORTED: linux, solaris
4 
5 #include <cstdlib>
6 #include <ctime>
7 #include <cstdio>
8 #include <inttypes.h>
9 
10 void print_buf(unsigned char *buf, size_t buflen) {
11   printf("buf '");
12   for (auto i = 0; i < buflen; i ++)
13     printf("%" PRIx8, buf[i]);
14   printf("'\n");
15 }
16 
17 void test_seed() {
18 #ifdef __NetBSD__
19   time_t now = ::time(nullptr);
20   arc4random_addrandom((unsigned char *)&now, sizeof(now));
21 #endif
22 }
23 
24 void test_arc4random() {
25   printf("test_arc4random\n");
26   auto i = arc4random();
27   print_buf((unsigned char *)&i, sizeof(i));
28 }
29 
30 void test_arc4random_uniform() {
31   printf("test_arc4random_uniform\n");
32   auto i = arc4random_uniform(1024);
33   print_buf((unsigned char *)&i, sizeof(i));
34 }
35 
36 void test_arc4random_buf10() {
37   printf("test_arc4random_buf10\n");
38   char buf[10];
39 #ifdef __NetBSD__
40   arc4random_stir();
41 #endif
42   arc4random_buf(buf, sizeof(buf));
43   print_buf((unsigned char *)buf, sizeof(buf));
44 }
45 
46 void test_arc4random_buf256() {
47   printf("test_arc4random_buf256\n");
48   char buf[256];
49 #ifdef __NetBSD__
50   arc4random_stir();
51 #endif
52   arc4random_buf(buf, sizeof(buf));
53   print_buf((unsigned char *)buf, sizeof(buf));
54 }
55 
56 int main(void) {
57   test_seed();
58   test_arc4random();
59   test_arc4random_uniform();
60   test_arc4random_buf10();
61   test_arc4random_buf256();
62   return 0;
63   // CHECK: test_arc4random
64   // CHECK: buf '{{.*}}'
65   // CHECK: test_arc4random_uniform
66   // CHECK: buf '{{.*}}'
67   // CHECK: test_arc4random_buf10
68   // CHECK: buf '{{.*}}'
69   // CHECK: test_arc4random_buf256
70   // CHECK: buf '{{.*}}'
71 }
72