source: vscpl/src/hu/varadiistvan/scpl/io/_win32/ReadingBuffer.cc@ 43:8e77881a3032

Last change on this file since 43:8e77881a3032 was 9:84f0dcb053b4, checked in by István Váradi <ivaradi@…>, 12 years ago

Imported the Win32-specific I/O code

File size: 2.7 KB
Line 
1// Copyright (c) 2013 by István Váradi
2
3// This file is part of VSCPL, a simple cross-platform utility library
4
5// Redistribution and use in source and binary forms, with or without
6// modification, are permitted provided that the following conditions are met:
7
8// 1. Redistributions of source code must retain the above copyright notice, this
9// list of conditions and the following disclaimer.
10// 2. Redistributions in binary form must reproduce the above copyright notice,
11// this list of conditions and the following disclaimer in the documentation
12// and/or other materials provided with the distribution.
13
14// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
15// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
18// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
21// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
23// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24
25// The views and conclusions contained in the software and documentation are those
26// of the authors and should not be interpreted as representing official policies,
27// either expressed or implied, of the FreeBSD Project.
28
29//------------------------------------------------------------------------------
30
31#include "ReadingBuffer.h"
32
33//------------------------------------------------------------------------------
34
35using hu::varadiistvan::scpl::io::ReadingBuffer;
36
37//------------------------------------------------------------------------------
38
39bool ReadingBuffer::read()
40{
41 if (failed()) return false;
42
43 if (getLength()>0) {
44 return true;
45 }
46
47 bool result = false;
48 if (checkWaitedResult(result)) {
49 return result;
50 }
51
52 BufferedStream& stream = getStream();
53 ssize_t numRead = stream.read(getData(), getCapacity(), overlapped);
54 if (numRead<0) {
55 if (!stream.failed()) {
56 addTo(stream.getWaiter());
57 }
58 } else {
59 addLength(numRead);
60 }
61 return numRead>=0;
62}
63
64//------------------------------------------------------------------------------
65
66void ReadingBuffer::handleWaitedResult(DWORD size)
67{
68 addLength(size);
69}
70
71//------------------------------------------------------------------------------
72
73// Local Variables:
74// mode: C++
75// c-basic-offset: 4
76// indent-tabs-mode: nil
77// End:
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