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