seekoff.pass.cpp revision bc8d3f97eb5c958007f2713238472e0c1c8fe02c 
1//===----------------------------------------------------------------------===//
2//
3// ��������������������The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. 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
21int 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