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
main()21 int main()
22 {
23 {
24 std::stringbuf sb(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(0, std::ios_base::beg, std::ios_base::in) == 0);
32 assert(sb.pubseekoff(0, std::ios_base::cur, std::ios_base::in) == 0);
33 assert(sb.pubseekoff(0, std::ios_base::end, std::ios_base::in) == 0);
34 }
35 {
36 std::stringbuf sb(std::ios_base::out);
37 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == -1);
38 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == -1);
39 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == -1);
40 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in | std::ios_base::out) == -1);
41 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in | std::ios_base::out) == -1);
42 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in | std::ios_base::out) == -1);
43 assert(sb.pubseekoff(0, std::ios_base::beg, std::ios_base::out) == 0);
44 assert(sb.pubseekoff(0, std::ios_base::cur, std::ios_base::out) == 0);
45 assert(sb.pubseekoff(0, std::ios_base::end, std::ios_base::out) == 0);
46 }
47 {
48 std::stringbuf sb("0123456789", std::ios_base::in);
49 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == -1);
50 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == -1);
51 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == -1);
52 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in | std::ios_base::out) == -1);
53 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in | std::ios_base::out) == -1);
54 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in | std::ios_base::out) == -1);
55 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == 3);
56 assert(sb.sgetc() == '3');
57 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == 6);
58 assert(sb.sgetc() == '6');
59 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == 7);
60 assert(sb.sgetc() == '7');
61 }
62 {
63 std::stringbuf sb("0123456789", std::ios_base::out);
64 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == -1);
65 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == -1);
66 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == -1);
67 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out | std::ios_base::in) == -1);
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) == -1);
70 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == 3);
71 assert(sb.sputc('a') == 'a');
72 assert(sb.str() == "012a456789");
73 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == 7);
74 assert(sb.sputc('b') == 'b');
75 assert(sb.str() == "012a456b89");
76 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == 7);
77 assert(sb.sputc('c') == 'c');
78 assert(sb.str() == "012a456c89");
79 }
80 {
81 std::stringbuf sb("0123456789");
82 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == 3);
83 assert(sb.sgetc() == '3');
84 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == 6);
85 assert(sb.sgetc() == '6');
86 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == 7);
87 assert(sb.sgetc() == '7');
88 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out | std::ios_base::in) == 3);
89 assert(sb.sgetc() == '3');
90 assert(sb.sputc('a') == 'a');
91 assert(sb.str() == "012a456789");
92 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out | std::ios_base::in) == -1);
93 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out | std::ios_base::in) == 7);
94 assert(sb.sgetc() == '7');
95 assert(sb.sputc('c') == 'c');
96 assert(sb.str() == "012a456c89");
97 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == 3);
98 assert(sb.sputc('3') == '3');
99 assert(sb.str() == "0123456c89");
100 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == 7);
101 assert(sb.sputc('7') == '7');
102 assert(sb.str() == "0123456789");
103 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == 7);
104 assert(sb.sputc('c') == 'c');
105 assert(sb.str() == "0123456c89");
106 }
107 {
108 std::wstringbuf sb(L"0123456789", std::ios_base::in);
109 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == -1);
110 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == -1);
111 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == -1);
112 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in | std::ios_base::out) == -1);
113 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in | std::ios_base::out) == -1);
114 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in | std::ios_base::out) == -1);
115 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == 3);
116 assert(sb.sgetc() == L'3');
117 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == 6);
118 assert(sb.sgetc() == L'6');
119 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == 7);
120 assert(sb.sgetc() == L'7');
121 }
122 {
123 std::wstringbuf sb(L"0123456789", std::ios_base::out);
124 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == -1);
125 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == -1);
126 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == -1);
127 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out | std::ios_base::in) == -1);
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) == -1);
130 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == 3);
131 assert(sb.sputc(L'a') == L'a');
132 assert(sb.str() == L"012a456789");
133 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == 7);
134 assert(sb.sputc(L'b') == L'b');
135 assert(sb.str() == L"012a456b89");
136 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == 7);
137 assert(sb.sputc(L'c') == L'c');
138 assert(sb.str() == L"012a456c89");
139 }
140 {
141 std::wstringbuf sb(L"0123456789");
142 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == 3);
143 assert(sb.sgetc() == L'3');
144 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == 6);
145 assert(sb.sgetc() == L'6');
146 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == 7);
147 assert(sb.sgetc() == L'7');
148 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out | std::ios_base::in) == 3);
149 assert(sb.sgetc() == L'3');
150 assert(sb.sputc(L'a') == L'a');
151 assert(sb.str() == L"012a456789");
152 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out | std::ios_base::in) == -1);
153 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out | std::ios_base::in) == 7);
154 assert(sb.sgetc() == L'7');
155 assert(sb.sputc(L'c') == L'c');
156 assert(sb.str() == L"012a456c89");
157 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == 3);
158 assert(sb.sputc(L'3') == L'3');
159 assert(sb.str() == L"0123456c89");
160 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == 7);
161 assert(sb.sputc(L'7') == L'7');
162 assert(sb.str() == L"0123456789");
163 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == 7);
164 assert(sb.sputc(L'c') == L'c');
165 assert(sb.str() == L"0123456c89");
166 }
167 }
168