seekpos.pass.cpp revision f5256e16dfc425c1d466f6308d4026d529ce9e0b 
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 seekpos(pos_type sp,
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.pubseekpos(3, std::ios_base::out) == -1);
26        assert(sb.pubseekpos(3, std::ios_base::in | std::ios_base::out) == -1);
27        assert(sb.pubseekpos(3, std::ios_base::in) == 3);
28        assert(sb.sgetc() == '3');
29    }
30    {
31        std::stringbuf sb("0123456789", std::ios_base::out);
32        assert(sb.pubseekpos(3, std::ios_base::in) == -1);
33        assert(sb.pubseekpos(3, std::ios_base::out | std::ios_base::in) == -1);
34        assert(sb.pubseekpos(3, std::ios_base::out) == 3);
35        assert(sb.sputc('a') == 'a');
36        assert(sb.str() == "012a456789");
37    }
38    {
39        std::stringbuf sb("0123456789");
40        assert(sb.pubseekpos(3, std::ios_base::in) == 3);
41        assert(sb.sgetc() == '3');
42        assert(sb.pubseekpos(3, std::ios_base::out | std::ios_base::in) == 3);
43        assert(sb.sgetc() == '3');
44        assert(sb.sputc('a') == 'a');
45        assert(sb.str() == "012a456789");
46        assert(sb.pubseekpos(3, std::ios_base::out) == 3);
47        assert(sb.sputc('3') == '3');
48        assert(sb.str() == "0123456789");
49    }
50    {
51        std::wstringbuf sb(L"0123456789", std::ios_base::in);
52        assert(sb.pubseekpos(3, std::ios_base::out) == -1);
53        assert(sb.pubseekpos(3, std::ios_base::in | std::ios_base::out) == -1);
54        assert(sb.pubseekpos(3, std::ios_base::in) == 3);
55        assert(sb.sgetc() == L'3');
56    }
57    {
58        std::wstringbuf sb(L"0123456789", std::ios_base::out);
59        assert(sb.pubseekpos(3, std::ios_base::in) == -1);
60        assert(sb.pubseekpos(3, std::ios_base::out | std::ios_base::in) == -1);
61        assert(sb.pubseekpos(3, std::ios_base::out) == 3);
62        assert(sb.sputc(L'a') == L'a');
63        assert(sb.str() == L"012a456789");
64    }
65    {
66        std::wstringbuf sb(L"0123456789");
67        assert(sb.pubseekpos(3, std::ios_base::in) == 3);
68        assert(sb.sgetc() == L'3');
69        assert(sb.pubseekpos(3, std::ios_base::out | std::ios_base::in) == 3);
70        assert(sb.sgetc() == L'3');
71        assert(sb.sputc(L'a') == L'a');
72        assert(sb.str() == L"012a456789");
73        assert(sb.pubseekpos(3, std::ios_base::out) == 3);
74        assert(sb.sputc(L'3') == L'3');
75        assert(sb.str() == L"0123456789");
76    }
77}
78