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 // <sstream>
11 
12 // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
13 // class basic_stringbuf
14 
15 // pos_type seekoff(off_type off, ios_base::seekdir way,
16 //                  ios_base::openmode which = ios_base::in | ios_base::out);
17 
18 #include <sstream>
19 #include <cassert>
20 
21 int main()
22 {
23     {
24         std::stringbuf sb("0123456789", std::ios_base::in);
25         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == -1);
26         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == -1);
27         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == -1);
28         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in | std::ios_base::out) == -1);
29         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in | std::ios_base::out) == -1);
30         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in | std::ios_base::out) == -1);
31         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == 3);
32         assert(sb.sgetc() == '3');
33         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == 6);
34         assert(sb.sgetc() == '6');
35         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == 7);
36         assert(sb.sgetc() == '7');
37     }
38     {
39         std::stringbuf sb("0123456789", std::ios_base::out);
40         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == -1);
41         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == -1);
42         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == -1);
43         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out | std::ios_base::in) == -1);
44         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out | std::ios_base::in) == -1);
45         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out | std::ios_base::in) == -1);
46         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == 3);
47         assert(sb.sputc('a') == 'a');
48         assert(sb.str() == "012a456789");
49         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == 7);
50         assert(sb.sputc('b') == 'b');
51         assert(sb.str() == "012a456b89");
52         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == 7);
53         assert(sb.sputc('c') == 'c');
54         assert(sb.str() == "012a456c89");
55     }
56     {
57         std::stringbuf sb("0123456789");
58         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == 3);
59         assert(sb.sgetc() == '3');
60         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == 6);
61         assert(sb.sgetc() == '6');
62         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == 7);
63         assert(sb.sgetc() == '7');
64         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out | std::ios_base::in) == 3);
65         assert(sb.sgetc() == '3');
66         assert(sb.sputc('a') == 'a');
67         assert(sb.str() == "012a456789");
68         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out | std::ios_base::in) == -1);
69         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out | std::ios_base::in) == 7);
70         assert(sb.sgetc() == '7');
71         assert(sb.sputc('c') == 'c');
72         assert(sb.str() == "012a456c89");
73         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == 3);
74         assert(sb.sputc('3') == '3');
75         assert(sb.str() == "0123456c89");
76         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == 7);
77         assert(sb.sputc('7') == '7');
78         assert(sb.str() == "0123456789");
79         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == 7);
80         assert(sb.sputc('c') == 'c');
81         assert(sb.str() == "0123456c89");
82     }
83     {
84         std::wstringbuf sb(L"0123456789", std::ios_base::in);
85         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == -1);
86         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == -1);
87         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == -1);
88         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in | std::ios_base::out) == -1);
89         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in | std::ios_base::out) == -1);
90         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in | std::ios_base::out) == -1);
91         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == 3);
92         assert(sb.sgetc() == L'3');
93         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == 6);
94         assert(sb.sgetc() == L'6');
95         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == 7);
96         assert(sb.sgetc() == L'7');
97     }
98     {
99         std::wstringbuf sb(L"0123456789", std::ios_base::out);
100         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == -1);
101         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == -1);
102         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == -1);
103         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out | std::ios_base::in) == -1);
104         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out | std::ios_base::in) == -1);
105         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out | std::ios_base::in) == -1);
106         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == 3);
107         assert(sb.sputc(L'a') == L'a');
108         assert(sb.str() == L"012a456789");
109         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == 7);
110         assert(sb.sputc(L'b') == L'b');
111         assert(sb.str() == L"012a456b89");
112         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == 7);
113         assert(sb.sputc(L'c') == L'c');
114         assert(sb.str() == L"012a456c89");
115     }
116     {
117         std::wstringbuf sb(L"0123456789");
118         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == 3);
119         assert(sb.sgetc() == L'3');
120         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == 6);
121         assert(sb.sgetc() == L'6');
122         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == 7);
123         assert(sb.sgetc() == L'7');
124         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out | std::ios_base::in) == 3);
125         assert(sb.sgetc() == L'3');
126         assert(sb.sputc(L'a') == L'a');
127         assert(sb.str() == L"012a456789");
128         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out | std::ios_base::in) == -1);
129         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out | std::ios_base::in) == 7);
130         assert(sb.sgetc() == L'7');
131         assert(sb.sputc(L'c') == L'c');
132         assert(sb.str() == L"012a456c89");
133         assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == 3);
134         assert(sb.sputc(L'3') == L'3');
135         assert(sb.str() == L"0123456c89");
136         assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == 7);
137         assert(sb.sputc(L'7') == L'7');
138         assert(sb.str() == L"0123456789");
139         assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == 7);
140         assert(sb.sputc(L'c') == L'c');
141         assert(sb.str() == L"0123456c89");
142     }
143 }
144