| 1 | // Copyright (c) 2012 by István Váradi
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| 2 |
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| 3 | // This file is part of libxplcommon, a common utility library for
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| 4 | // development related to X-Plane
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| 5 |
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| 6 | // Redistribution and use in source and binary forms, with or without
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| 7 | // modification, are permitted provided that the following conditions are met:
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| 8 |
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| 9 | // 1. Redistributions of source code must retain the above copyright notice, this
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| 10 | // list of conditions and the following disclaimer.
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| 11 | // 2. Redistributions in binary form must reproduce the above copyright notice,
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| 12 | // this list of conditions and the following disclaimer in the documentation
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| 13 | // and/or other materials provided with the distribution.
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| 14 |
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| 15 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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| 16 | // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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| 17 | // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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| 18 | // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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| 19 | // ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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| 20 | // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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| 21 | // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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| 22 | // ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 23 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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| 24 | // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 25 |
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| 26 | // The views and conclusions contained in the software and documentation are those
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| 27 | // of the authors and should not be interpreted as representing official policies,
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| 28 | // either expressed or implied, of the FreeBSD Project.
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| 29 |
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| 30 | //------------------------------------------------------------------------------
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| 31 |
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| 32 | #include "ReadingBuffer.h"
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| 33 |
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| 34 | #include "BufferedStream.h"
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| 35 |
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| 36 | #include <cassert>
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| 37 |
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| 38 | #include <poll.h>
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| 39 |
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| 40 | //------------------------------------------------------------------------------
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| 41 |
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| 42 | using xplcommon::posix::ReadingBuffer;
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| 43 |
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| 44 | //------------------------------------------------------------------------------
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| 45 |
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| 46 | bool ReadingBuffer::read()
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| 47 | {
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| 48 | if (failed()) return false;
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| 49 |
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| 50 | if (getLength()>0) {
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| 51 | stream.events &= ~POLLIN;
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| 52 | return true;
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| 53 | }
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| 54 |
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| 55 | ssize_t result = stream.read(getData(), getCapacity());
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| 56 | if (result<0) {
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| 57 | if (stream.failed()) {
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| 58 | stream.events &= ~POLLIN;
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| 59 | } else {
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| 60 | stream.events |= POLLIN;
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| 61 | }
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| 62 | } else {
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| 63 | stream.events &= ~POLLIN;
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| 64 | size_t added = addLength(result);
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| 65 | assert(static_cast<ssize_t>(added)==result);
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| 66 | assert(static_cast<ssize_t>(getLength())==result);
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| 67 | }
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| 68 | return result>=0;
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| 69 | }
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| 70 |
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| 71 | //------------------------------------------------------------------------------
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| 72 |
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| 73 | // Local Variables:
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| 74 | // mode: C++
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| 75 | // c-basic-offset: 4
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| 76 | // indent-tabs-mode: nil
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| 77 | // End:
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