1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
// RUN: %clangxx -O0 -g %s -o %t && %run %t 2>&1 | FileCheck %s
// UNSUPPORTED: solaris
#include <stdio.h>
void print_something() {
for (size_t i = 0; i < 10 * BUFSIZ; i++)
printf("Hello world %zu\n", i);
}
void print_one_byte(char *buf) {
printf("First byte is %c\n", buf[0]);
}
void test_setbuf() {
char buf[BUFSIZ];
setbuf(stdout, NULL);
print_something();
setbuf(stdout, buf);
print_something();
print_one_byte(buf);
}
void test_setbuffer() {
char buf[BUFSIZ];
setbuffer(stdout, NULL, 0);
print_something();
setbuffer(stdout, buf, BUFSIZ);
print_something();
print_one_byte(buf);
}
void test_setlinebuf() {
setlinebuf(stdout);
print_something();
}
void test_setvbuf() {
char buf[BUFSIZ];
setvbuf(stdout, NULL, _IONBF, 0);
print_something();
setvbuf(stdout, buf, _IOLBF, BUFSIZ);
print_something();
print_one_byte(buf);
setvbuf(stdout, buf, _IOFBF, BUFSIZ);
print_something();
print_one_byte(buf);
}
int main(void) {
printf("setvbuf\n");
test_setbuf();
test_setbuffer();
test_setlinebuf();
test_setvbuf();
// CHECK: setvbuf
return 0;
}
|
