xsgetn.pass.cpp revision f5256e16dfc425c1d466f6308d4026d529ce9e0b 
1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. 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
20struct test
21    : public std::basic_streambuf<char>
22{
23    typedef std::basic_streambuf<char> base;
24
25    test() {}
26
27    void setg(char* gbeg, char* gnext, char* gend)
28    {
29        base::setg(gbeg, gnext, gend);
30    }
31};
32
33int 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