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
21 int overflow_called = 0;
22
23 struct test
24 : public std::basic_streambuf<char>
25 {
26 typedef std::basic_streambuf<char> base;
27
testtest28 test() {}
29
setgtest30 void setg(char* gbeg, char* gnext, char* gend)
31 {
32 base::setg(gbeg, gnext, gend);
33 }
setptest34 void setp(char* pbeg, char* pend)
35 {
36 base::setp(pbeg, pend);
37 }
38
39 protected:
overflowtest40 int_type overflow(int_type = traits_type::eof())
41 {
42 ++overflow_called;
43 return 'a';
44 }
45 };
46
main(int,char **)47 int 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(out, 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