1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // <streambuf>
11
12 // template <class charT, class traits = char_traits<charT> >
13 // class basic_streambuf;
14
15 // streamsize xsgetn(char_type* s, streamsize n);
16
17 #include <streambuf>
18 #include <cassert>
19
20 struct test
21 : public std::basic_streambuf<char>
22 {
23 typedef std::basic_streambuf<char> base;
24
testtest25 test() {}
26
setgtest27 void setg(char* gbeg, char* gnext, char* gend)
28 {
29 base::setg(gbeg, gnext, gend);
30 }
31 };
32
main()33 int main()
34 {
35 test t;
36 char input[7] = "123456";
37 t.setg(input, input, input+7);
38 char output[sizeof(input)] = {0};
39 assert(t.sgetn(output, 10) == 7);
40 assert(strcmp(input, output) == 0);
41 }
42