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 // <fstream>
11 
12 // basic_filebuf<charT,traits>* open(const char* s, ios_base::openmode mode);
13 
14 #include <fstream>
15 #include <cassert>
16 #include "platform_support.h"
17 
18 int main()
19 {
20     std::string temp = get_temp_file_name();
21     {
22         std::filebuf f;
23         assert(f.open(temp.c_str(), std::ios_base::out) != 0);
24         assert(f.is_open());
25         assert(f.sputn("123", 3) == 3);
26     }
27     {
28         std::filebuf f;
29         assert(f.open(temp.c_str(), std::ios_base::in) != 0);
30         assert(f.is_open());
31         assert(f.sbumpc() == '1');
32         assert(f.sbumpc() == '2');
33         assert(f.sbumpc() == '3');
34     }
35     std::remove(temp.c_str());
36     {
37         std::wfilebuf f;
38         assert(f.open(temp.c_str(), std::ios_base::out) != 0);
39         assert(f.is_open());
40         assert(f.sputn(L"123", 3) == 3);
41     }
42     {
43         std::wfilebuf f;
44         assert(f.open(temp.c_str(), std::ios_base::in) != 0);
45         assert(f.is_open());
46         assert(f.sbumpc() == L'1');
47         assert(f.sbumpc() == L'2');
48         assert(f.sbumpc() == L'3');
49     }
50     remove(temp.c_str());
51 }
52