90 lines
1.3 KiB
C++
90 lines
1.3 KiB
C++
// RUN: %clangxx -O0 -g %s -o %t && %run %t 2>&1 | FileCheck %s
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// UNSUPPORTED: solaris
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#include <stdio.h>
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void print_something() {
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for (size_t i = 0; i < 10 * BUFSIZ; i++)
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printf("Hello world %zu\n", i);
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}
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void print_one_byte(char *buf) {
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printf("First byte is %c\n", buf[0]);
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}
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void test_setbuf() {
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char buf[BUFSIZ];
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setbuf(stdout, NULL);
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print_something();
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setbuf(stdout, buf);
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print_something();
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print_one_byte(buf);
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setbuf(stdout, NULL);
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}
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void test_setbuffer() {
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char buf[BUFSIZ];
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setbuffer(stdout, NULL, 0);
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print_something();
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// Ensure that interceptor reads correct size
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// (not BUFSIZ as by default, hence BUFSIZ/2).
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setbuffer(stdout, buf, BUFSIZ / 2);
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print_something();
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print_one_byte(buf);
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setbuffer(stdout, NULL, 0);
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}
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void test_setlinebuf() {
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setlinebuf(stdout);
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print_something();
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}
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void test_setvbuf() {
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char buf[BUFSIZ];
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setvbuf(stdout, NULL, _IONBF, 0);
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print_something();
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setvbuf(stdout, buf, _IOLBF, BUFSIZ);
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print_something();
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print_one_byte(buf);
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setvbuf(stdout, buf, _IOFBF, BUFSIZ);
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print_something();
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print_one_byte(buf);
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setvbuf(stdout, NULL, _IONBF, 0);
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}
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int main(void) {
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printf("setvbuf\n");
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test_setbuf();
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test_setbuffer();
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test_setlinebuf();
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test_setvbuf();
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// CHECK: setvbuf
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return 0;
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}
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