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 // streamsize xsputn(const char_type* s, streamsize n);
15 
16 #include <streambuf>
17 #include <cassert>
18 #include <cstring>
19 
20 #include "test_macros.h"
21 
22 struct test
23     : public std::basic_streambuf<char>
24 {
25     typedef std::basic_streambuf<char> base;
26 
27     test() {}
28 
29     void setp(char* pbeg, char* pend)
30     {
31         base::setp(pbeg, pend);
32     }
33 };
34 
35 int main(int, char**)
36 {
37     {
38         test t;
39         char in[] = "123456";
40         assert(t.sputn(in, sizeof(in)) == 0);
41         char out[sizeof(in)] = {0};
42         t.setp(out, out+sizeof(out));
43         assert(t.sputn(in, sizeof(in)) == sizeof(in));
44         assert(std::strcmp(in, out) == 0);
45     }
46 
47   return 0;
48 }
49