Mercurial > hg > orthanc
annotate OrthancFramework/Sources/DicomFormat/StreamBlockReader.h @ 4933:312c6f4da888 more-tags
adding MainDicomTags signatures
author | Alain Mazy <am@osimis.io> |
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date | Wed, 09 Mar 2022 12:16:45 +0100 |
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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) 2017-2022 Osimis S.A., Belgium |
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium |
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7 * |
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8 * This program is free software: you can redistribute it and/or |
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9 * modify it under the terms of the GNU Lesser General Public License |
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10 * as published by the Free Software Foundation, either version 3 of |
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11 * the License, or (at your option) any later version. |
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12 * |
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13 * This program is distributed in the hope that it will be useful, but |
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 * Lesser General Public License for more details. |
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17 * |
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18 * You should have received a copy of the GNU Lesser General Public |
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19 * License along with this program. If not, see |
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20 * <http://www.gnu.org/licenses/>. |
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21 **/ |
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22 |
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23 |
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24 #pragma once |
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25 |
4224 | 26 #include "../OrthancFramework.h" // For ORTHANC_PUBLIC |
27 | |
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28 #include <boost/noncopyable.hpp> |
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29 #include <istream> |
4225 | 30 #include <stdint.h> |
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31 #include <string> |
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32 |
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33 |
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34 namespace Orthanc |
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35 { |
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36 /** |
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37 * This class is used to extract blocks of given size from a |
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38 * stream. Bytes from the stream are buffered until the requested |
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39 * size is available, and the full block can be returned. |
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40 **/ |
4224 | 41 class ORTHANC_PUBLIC StreamBlockReader : public boost::noncopyable |
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42 { |
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43 private: |
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44 std::istream& stream_; |
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45 std::string block_; |
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46 size_t blockPos_; |
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47 uint64_t processedBytes_; |
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48 |
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49 public: |
4223 | 50 explicit StreamBlockReader(std::istream& stream); |
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51 |
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52 /** |
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53 * Schedule the size of the next block to be extracted from the |
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54 * stream. |
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55 **/ |
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56 void Schedule(size_t blockSize); |
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57 |
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58 /** |
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59 * Extract the block whose size was configured by the previous |
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60 * call to "Schedule()". Returns "false" iff not enough bytes are |
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61 * available from the stream yet: In this case, try again later. |
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62 **/ |
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63 bool Read(std::string& block); |
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64 |
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65 uint64_t GetProcessedBytes() const; |
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66 }; |
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67 } |