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 seekoff(off_type off, ios_base::seekdir way,
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 
22 int main(int, char**)
23 {
24     {
25         std::stringbuf sb(std::ios_base::in);
26         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == -1);
27         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == -1);
28         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == -1);
29         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in | std::ios_base::out) == -1);
30         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in | std::ios_base::out) == -1);
31         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in | std::ios_base::out) == -1);
32         assert(sb.pubseekoff(0, std::ios_base::beg, std::ios_base::in) == 0);
33         assert(sb.pubseekoff(0, std::ios_base::cur, std::ios_base::in) == 0);
34         assert(sb.pubseekoff(0, std::ios_base::end, std::ios_base::in) == 0);
35     }
36     {
37         std::stringbuf sb(std::ios_base::out);
38         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == -1);
39         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == -1);
40         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == -1);
41         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in | std::ios_base::out) == -1);
42         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in | std::ios_base::out) == -1);
43         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in | std::ios_base::out) == -1);
44         assert(sb.pubseekoff(0, std::ios_base::beg, std::ios_base::out) == 0);
45         assert(sb.pubseekoff(0, std::ios_base::cur, std::ios_base::out) == 0);
46         assert(sb.pubseekoff(0, std::ios_base::end, std::ios_base::out) == 0);
47     }
48     {
49         std::stringbuf sb("0123456789", std::ios_base::in);
50         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == -1);
51         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == -1);
52         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == -1);
53         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in | std::ios_base::out) == -1);
54         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in | std::ios_base::out) == -1);
55         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in | std::ios_base::out) == -1);
56         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == 3);
57         assert(sb.sgetc() == '3');
58         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == 6);
59         assert(sb.sgetc() == '6');
60         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == 7);
61         assert(sb.sgetc() == '7');
62     }
63     {
64         std::stringbuf sb("0123456789", std::ios_base::out);
65         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == -1);
66         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == -1);
67         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == -1);
68         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out | std::ios_base::in) == -1);
69         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out | std::ios_base::in) == -1);
70         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out | std::ios_base::in) == -1);
71         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == 3);
72         assert(sb.sputc('a') == 'a');
73         assert(sb.str() == "012a456789");
74         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == 7);
75         assert(sb.sputc('b') == 'b');
76         assert(sb.str() == "012a456b89");
77         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == 7);
78         assert(sb.sputc('c') == 'c');
79         assert(sb.str() == "012a456c89");
80     }
81     {
82         std::stringbuf sb("0123456789");
83         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == 3);
84         assert(sb.sgetc() == '3');
85         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == 6);
86         assert(sb.sgetc() == '6');
87         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == 7);
88         assert(sb.sgetc() == '7');
89         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out | std::ios_base::in) == 3);
90         assert(sb.sgetc() == '3');
91         assert(sb.sputc('a') == 'a');
92         assert(sb.str() == "012a456789");
93         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out | std::ios_base::in) == -1);
94         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out | std::ios_base::in) == 7);
95         assert(sb.sgetc() == '7');
96         assert(sb.sputc('c') == 'c');
97         assert(sb.str() == "012a456c89");
98         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == 3);
99         assert(sb.sputc('3') == '3');
100         assert(sb.str() == "0123456c89");
101         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == 7);
102         assert(sb.sputc('7') == '7');
103         assert(sb.str() == "0123456789");
104         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == 7);
105         assert(sb.sputc('c') == 'c');
106         assert(sb.str() == "0123456c89");
107     }
108 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
109     {
110         std::wstringbuf sb(L"0123456789", std::ios_base::in);
111         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == -1);
112         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == -1);
113         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == -1);
114         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in | std::ios_base::out) == -1);
115         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in | std::ios_base::out) == -1);
116         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in | std::ios_base::out) == -1);
117         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == 3);
118         assert(sb.sgetc() == L'3');
119         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == 6);
120         assert(sb.sgetc() == L'6');
121         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == 7);
122         assert(sb.sgetc() == L'7');
123     }
124     {
125         std::wstringbuf sb(L"0123456789", std::ios_base::out);
126         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == -1);
127         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == -1);
128         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == -1);
129         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out | std::ios_base::in) == -1);
130         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out | std::ios_base::in) == -1);
131         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out | std::ios_base::in) == -1);
132         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == 3);
133         assert(sb.sputc(L'a') == L'a');
134         assert(sb.str() == L"012a456789");
135         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == 7);
136         assert(sb.sputc(L'b') == L'b');
137         assert(sb.str() == L"012a456b89");
138         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == 7);
139         assert(sb.sputc(L'c') == L'c');
140         assert(sb.str() == L"012a456c89");
141     }
142     {
143         std::wstringbuf sb(L"0123456789");
144         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == 3);
145         assert(sb.sgetc() == L'3');
146         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == 6);
147         assert(sb.sgetc() == L'6');
148         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == 7);
149         assert(sb.sgetc() == L'7');
150         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out | std::ios_base::in) == 3);
151         assert(sb.sgetc() == L'3');
152         assert(sb.sputc(L'a') == L'a');
153         assert(sb.str() == L"012a456789");
154         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out | std::ios_base::in) == -1);
155         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out | std::ios_base::in) == 7);
156         assert(sb.sgetc() == L'7');
157         assert(sb.sputc(L'c') == L'c');
158         assert(sb.str() == L"012a456c89");
159         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == 3);
160         assert(sb.sputc(L'3') == L'3');
161         assert(sb.str() == L"0123456c89");
162         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == 7);
163         assert(sb.sputc(L'7') == L'7');
164         assert(sb.str() == L"0123456789");
165         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == 7);
166         assert(sb.sputc(L'c') == L'c');
167         assert(sb.str() == L"0123456c89");
168     }
169 #endif // TEST_HAS_NO_WIDE_CHARACTERS
170 
171   return 0;
172 }
173