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annotate OrthancFramework/Sources/HttpServer/BufferHttpSender.cpp @ 4642:69bbb4bd35cb

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PngWriter recreates a new libpng context for each encoding
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 28 Apr 2021 11:22:39 +0200
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2021 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Lesser General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Lesser General Public
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18 * License along with this program. If not, see
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19 * <http://www.gnu.org/licenses/>.
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20 **/
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21
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22 #include "../PrecompiledHeaders.h"
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23 #include "BufferHttpSender.h"
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24
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25 #include "../OrthancException.h"
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26
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27 #include <cassert>
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28
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29 namespace Orthanc
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30 {
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31 BufferHttpSender::BufferHttpSender() :
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32 position_(0),
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33 chunkSize_(0),
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34 currentChunkSize_(0)
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35 {
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36 }
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37
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38 std::string &BufferHttpSender::GetBuffer()
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39 {
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40 return buffer_;
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41 }
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42
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43 const std::string &BufferHttpSender::GetBuffer() const
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44 {
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45 return buffer_;
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46 }
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47
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48 void BufferHttpSender::SetChunkSize(size_t chunkSize)
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49 {
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50 chunkSize_ = chunkSize;
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51 }
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52
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53 uint64_t BufferHttpSender::GetContentLength()
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54 {
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55 return buffer_.size();
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56 }
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57
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58
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59 bool BufferHttpSender::ReadNextChunk()
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60 {
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61 assert(position_ + currentChunkSize_ <= buffer_.size());
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62
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63 position_ += currentChunkSize_;
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64
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65 if (position_ == buffer_.size())
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66 {
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67 return false;
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68 }
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69 else
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70 {
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71 currentChunkSize_ = buffer_.size() - position_;
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72
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73 if (chunkSize_ != 0 &&
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74 currentChunkSize_ > chunkSize_)
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75 {
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76 currentChunkSize_ = chunkSize_;
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77 }
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78
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79 return true;
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80 }
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81 }
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82
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83
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84 const char* BufferHttpSender::GetChunkContent()
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85 {
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86 return buffer_.c_str() + position_;
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87 }
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88
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89
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90 size_t BufferHttpSender::GetChunkSize()
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91 {
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92 return currentChunkSize_;
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93 }
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94 }