1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// <streambuf>
10
11// template <class charT, class traits = char_traits<charT> >
12// class basic_streambuf;
13
14// int_type sputc(char_type c);
15
16#include <streambuf>
17#include <cassert>
18
19#include "test_macros.h"
20
21int overflow_called = 0;
22
23struct test
24 : public std::basic_streambuf<char>
25{
26 typedef std::basic_streambuf<char> base;
27
28 test() {}
29
30 void setg(char* gbeg, char* gnext, char* gend)
31 {
32 base::setg(gbeg: gbeg, gnext: gnext, gend: gend);
33 }
34 void setp(char* pbeg, char* pend)
35 {
36 base::setp(pbeg: pbeg, pend: pend);
37 }
38
39protected:
40 int_type overflow(int_type = traits_type::eof())
41 {
42 ++overflow_called;
43 return 'a';
44 }
45};
46
47int main(int, char**)
48{
49 {
50 test t;
51 assert(overflow_called == 0);
52 assert(t.sputc('A') == 'a');
53 assert(overflow_called == 1);
54 char out[3] = {0};
55 t.setp(pbeg: out, pend: out+sizeof(out));
56 assert(t.sputc('A') == 'A');
57 assert(overflow_called == 1);
58 assert(out[0] == 'A');
59 assert(t.sputc('B') == 'B');
60 assert(overflow_called == 1);
61 assert(out[0] == 'A');
62 assert(out[1] == 'B');
63 }
64
65 return 0;
66}
67

source code of libcxx/test/std/input.output/stream.buffers/streambuf/streambuf.members/streambuf.pub.put/sputc.pass.cpp