1/*
2 * Distributed under the Boost Software License, Version 1.0.(See accompanying
3 * file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
4 *
5 * See http://www.boost.org/libs/iostreams for documentation.
6
7 * File: libs/iostreams/test/stream_offset_64bit_test.cpp
8 * Date: Sun Dec 23 21:11:23 MST 2007
9 * Copyright: 2007-2008 CodeRage, LLC
10 * Author: Jonathan Turkanis
11 * Contact: turkanis at coderage dot com
12 *
13 * Tests the functions defined in the header "boost/iostreams/positioning.hpp"
14 * with large (64-bit) file offsets.
15 */
16
17#include <cstdio> // fpos_t
18#include <iostream>
19#include <sstream>
20#include <boost/config.hpp> // BOOST_MSVC
21#include <boost/iostreams/detail/ios.hpp>
22#include <boost/iostreams/positioning.hpp>
23#include <boost/test/test_tools.hpp>
24#include <boost/test/unit_test.hpp>
25
26using namespace std;
27using namespace boost;
28using namespace boost::iostreams;
29using boost::unit_test::test_suite;
30
31#ifdef BOOST_MSVC
32# pragma warning(disable:4127)
33#endif
34
35void stream_offset_64bit_test()
36{
37 stream_offset large_file = (stream_offset) 100 *
38 (stream_offset) 1024 *
39 (stream_offset) 1024 *
40 (stream_offset) 1024;
41 stream_offset first = -large_file - (-large_file) % 10000000;
42 stream_offset last = large_file - large_file % 10000000;
43
44 for (stream_offset off = first; off < last; off += 10000000)
45 {
46 if (off != position_to_offset(pos: offset_to_position(off))) {
47 cout << "****************************************\n"
48 << "* sizeof(fpos_t) = " << sizeof(fpos_t) << "\n"
49 << "* sizeof(streamoff) = " << sizeof(streamoff) << "\n"
50 << "* sizeof(stream_offset) = "
51 << sizeof(stream_offset) << "\n"
52 << "****************************************\n";
53 stringstream s;
54 s << "off != position_to_offset(offset_to_position(off)) "
55 "failed for (off >> 32) == 0x"
56 << hex
57 << static_cast<unsigned int>(off >> 32)
58 << " and (off & 0xFFFFFFFF) == 0x"
59 << static_cast<unsigned int>(off & 0xFFFFFFFF)
60 << std::endl;
61 BOOST_REQUIRE_MESSAGE(0, s.str().c_str());
62 }
63 }
64}
65
66void stream_offset_64bit_test2()
67{
68 boost::int64_t val = boost::int64_t(1) << 31;
69 std::streampos pos = boost::iostreams::offset_to_position(off: val);
70 pos -= 2;
71 BOOST_CHECK_EQUAL(val - 2, boost::iostreams::position_to_offset(pos));
72
73 val = -val;
74 pos = boost::iostreams::offset_to_position(off: val);
75 pos += 2;
76 BOOST_CHECK_EQUAL(val + 2, boost::iostreams::position_to_offset(pos));
77}
78
79test_suite* init_unit_test_suite(int, char* [])
80{
81 test_suite* test = BOOST_TEST_SUITE("stream_offset 64-bit test");
82 test->add(BOOST_TEST_CASE(&stream_offset_64bit_test));
83 test->add(BOOST_TEST_CASE(&stream_offset_64bit_test2));
84 return test;
85}
86

source code of boost/libs/iostreams/test/stream_offset_64bit_test.cpp