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 // <fstream>
10
11 // basic_filebuf<charT,traits>* open(const char* s, ios_base::openmode mode);
12
13 #include <fstream>
14 #include <cassert>
15 #include "test_macros.h"
16 #include "platform_support.h"
17
main(int,char **)18 int main(int, char**)
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 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
38 {
39 std::wfilebuf f;
40 assert(f.open(temp.c_str(), std::ios_base::out) != 0);
41 assert(f.is_open());
42 assert(f.sputn(L"123", 3) == 3);
43 }
44 {
45 std::wfilebuf f;
46 assert(f.open(temp.c_str(), std::ios_base::in) != 0);
47 assert(f.is_open());
48 assert(f.sbumpc() == L'1');
49 assert(f.sbumpc() == L'2');
50 assert(f.sbumpc() == L'3');
51 }
52 std::remove(temp.c_str());
53 #endif
54
55 return 0;
56 }
57