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 xsgetn(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
testtest27 test() {}
28
setgtest29 void setg(char* gbeg, char* gnext, char* gend)
30 {
31 base::setg(gbeg, gnext, gend);
32 }
33 };
34
main(int,char **)35 int main(int, char**)
36 {
37 test t;
38 char input[7] = "123456";
39 t.setg(input, input, input+7);
40 char output[sizeof(input)] = {0};
41 assert(t.sgetn(output, 10) == 7);
42 assert(std::strcmp(input, output) == 0);
43
44 return 0;
45 }
46