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// 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();
// Ensure that interceptor reads correct size
// (not BUFSIZ as by default, hence BUFSIZ/2).
setbuffer(stdout, buf, BUFSIZ / 2);
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;
}
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