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// <sstream>
10
11// template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
12// class basic_stringbuf
13
14// pos_type seekpos(pos_type sp,
15// ios_base::openmode which = ios_base::in | ios_base::out);
16
17#include <sstream>
18#include <cassert>
19
20#include "test_macros.h"
21
22int main(int, char**)
23{
24 {
25 std::stringbuf sb("0123456789", std::ios_base::in);
26 assert(sb.pubseekpos(3, std::ios_base::out) == -1);
27 assert(sb.pubseekpos(3, std::ios_base::in | std::ios_base::out) == -1);
28 assert(sb.pubseekpos(3, std::ios_base::in) == 3);
29 assert(sb.sgetc() == '3');
30 }
31 {
32 std::stringbuf sb("0123456789", std::ios_base::out);
33 assert(sb.pubseekpos(3, std::ios_base::in) == -1);
34 assert(sb.pubseekpos(3, std::ios_base::out | std::ios_base::in) == -1);
35 assert(sb.pubseekpos(3, std::ios_base::out) == 3);
36 assert(sb.sputc('a') == 'a');
37 assert(sb.str() == "012a456789");
38 }
39 {
40 std::stringbuf sb("0123456789");
41 assert(sb.pubseekpos(3, std::ios_base::in) == 3);
42 assert(sb.sgetc() == '3');
43 assert(sb.pubseekpos(3, std::ios_base::out | std::ios_base::in) == 3);
44 assert(sb.sgetc() == '3');
45 assert(sb.sputc('a') == 'a');
46 assert(sb.str() == "012a456789");
47 assert(sb.pubseekpos(3, std::ios_base::out) == 3);
48 assert(sb.sputc('3') == '3');
49 assert(sb.str() == "0123456789");
50 }
51#ifndef TEST_HAS_NO_WIDE_CHARACTERS
52 {
53 std::wstringbuf sb(L"0123456789", std::ios_base::in);
54 assert(sb.pubseekpos(3, std::ios_base::out) == -1);
55 assert(sb.pubseekpos(3, std::ios_base::in | std::ios_base::out) == -1);
56 assert(sb.pubseekpos(3, std::ios_base::in) == 3);
57 assert(sb.sgetc() == L'3');
58 }
59 {
60 std::wstringbuf sb(L"0123456789", std::ios_base::out);
61 assert(sb.pubseekpos(3, std::ios_base::in) == -1);
62 assert(sb.pubseekpos(3, std::ios_base::out | std::ios_base::in) == -1);
63 assert(sb.pubseekpos(3, std::ios_base::out) == 3);
64 assert(sb.sputc(L'a') == L'a');
65 assert(sb.str() == L"012a456789");
66 }
67 {
68 std::wstringbuf sb(L"0123456789");
69 assert(sb.pubseekpos(3, std::ios_base::in) == 3);
70 assert(sb.sgetc() == L'3');
71 assert(sb.pubseekpos(3, std::ios_base::out | std::ios_base::in) == 3);
72 assert(sb.sgetc() == L'3');
73 assert(sb.sputc(L'a') == L'a');
74 assert(sb.str() == L"012a456789");
75 assert(sb.pubseekpos(3, std::ios_base::out) == 3);
76 assert(sb.sputc(L'3') == L'3');
77 assert(sb.str() == L"0123456789");
78 }
79#endif
80
81 return 0;
82}
83

source code of libcxx/test/std/input.output/string.streams/stringbuf/stringbuf.virtuals/seekpos.pass.cpp