1// Copyright 2010 Google Inc.
2// All rights reserved.
3//
4// Redistribution and use in source and binary forms, with or without
5// modification, are permitted provided that the following conditions are
6// met:
7//
8// * Redistributions of source code must retain the above copyright
9//   notice, this list of conditions and the following disclaimer.
10// * Redistributions in binary form must reproduce the above copyright
11//   notice, this list of conditions and the following disclaimer in the
12//   documentation and/or other materials provided with the distribution.
13// * Neither the name of Google Inc. nor the names of its contributors
14//   may be used to endorse or promote products derived from this software
15//   without specific prior written permission.
16//
17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29#include "utils/process/fdstream.hpp"
30
31#include "utils/process/systembuf.hpp"
32
33
34namespace utils {
35namespace process {
36
37
38/// Private implementation fields for ifdstream.
39struct ifdstream::impl {
40    /// The systembuf backing this file descriptor.
41    systembuf _systembuf;
42
43    /// Initializes private implementation data.
44    ///
45    /// \param fd The file descriptor.
46    impl(const int fd) : _systembuf(fd) {}
47};
48
49
50}  // namespace process
51}  // namespace utils
52
53
54namespace process = utils::process;
55
56
57/// Constructs a new ifdstream based on an open file descriptor.
58///
59/// This grabs ownership of the file descriptor.
60///
61/// \param fd The file descriptor to read from.  Must be open and valid.
62process::ifdstream::ifdstream(const int fd) :
63    std::istream(NULL),
64    _pimpl(new impl(fd))
65{
66    rdbuf(&_pimpl->_systembuf);
67}
68
69
70/// Destroys an ifdstream object.
71///
72/// \post The file descriptor attached to this stream is closed.
73process::ifdstream::~ifdstream(void)
74{
75}
76