1bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===//
2bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//
3f5256e16dfc425c1d466f6308d4026d529ce9e0bHoward Hinnant//                     The LLVM Compiler Infrastructure
4bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//
5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open
6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details.
7bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//
8bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===//
9bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
10bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// <fstream>
11bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
12256813f4e7915d64776a4edd5f4765d893b9f062Howard Hinnant// pos_type seekoff(off_type off, ios_base::seekdir way,
13bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//                  ios_base::openmode which = ios_base::in | ios_base::out);
14256813f4e7915d64776a4edd5f4765d893b9f062Howard Hinnant// pos_type seekpos(pos_type sp,
15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//                  ios_base::openmode which = ios_base::in | ios_base::out);
16bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
17bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// This test is not entirely portable
18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <fstream>
20bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <cassert>
21bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
22bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint main()
23bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{
24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant    {
25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        char buf[10];
26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        typedef std::filebuf::pos_type pos_type;
27bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        std::filebuf f;
28bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        f.pubsetbuf(buf, sizeof(buf));
29bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(f.open("seekoff.dat", std::ios_base::in | std::ios_base::out
30bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant                                                       | std::ios_base::trunc) != 0);
31bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(f.is_open());
32bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        f.sputn("abcdefghijklmnopqrstuvwxyz", 26);
33bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(buf[0] == 'v');
34bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        pos_type p = f.pubseekoff(-15, std::ios_base::cur);
35bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(p == 11);
36bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(f.sgetc() == 'l');
37bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        f.pubseekoff(0, std::ios_base::beg);
38bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(f.sgetc() == 'a');
39bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        f.pubseekoff(-1, std::ios_base::end);
40bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(f.sgetc() == 'z');
41bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(f.pubseekpos(p) == p);
42bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(f.sgetc() == 'l');
43bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant    }
44bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant    std::remove("seekoff.dat");
45bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant    {
46bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        wchar_t buf[10];
47bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        typedef std::filebuf::pos_type pos_type;
48bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        std::wfilebuf f;
49bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        f.pubsetbuf(buf, sizeof(buf)/sizeof(buf[0]));
50bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(f.open("seekoff.dat", std::ios_base::in | std::ios_base::out
51bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant                                                       | std::ios_base::trunc) != 0);
52bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(f.is_open());
53bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        f.sputn(L"abcdefghijklmnopqrstuvwxyz", 26);
54bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(buf[0] == L'v');
55bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        pos_type p = f.pubseekoff(-15, std::ios_base::cur);
56bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(p == 11);
57bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(f.sgetc() == L'l');
58bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        f.pubseekoff(0, std::ios_base::beg);
59bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(f.sgetc() == L'a');
60bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        f.pubseekoff(-1, std::ios_base::end);
61bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(f.sgetc() == L'z');
62bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(f.pubseekpos(p) == p);
63bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(f.sgetc() == L'l');
64bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant    }
65bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant    std::remove("seekoff.dat");
66bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant}
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