Mercurial > hg > orthanc
view OrthancFramework/Sources/DicomFormat/StreamBlockReader.h @ 5735:0ca3e7c86b5d
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author | Alain Mazy <am@orthanc.team> |
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date | Mon, 29 Jul 2024 14:41:38 +0200 |
parents | f7adfb22e20e |
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/** * Orthanc - A Lightweight, RESTful DICOM Store * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2023 Osimis S.A., Belgium * Copyright (C) 2024-2024 Orthanc Team SRL, Belgium * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium * * This program is free software: you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this program. If not, see * <http://www.gnu.org/licenses/>. **/ #pragma once #include "../OrthancFramework.h" // For ORTHANC_PUBLIC #include <boost/noncopyable.hpp> #include <istream> #include <stdint.h> #include <string> namespace Orthanc { /** * This class is used to extract blocks of given size from a * stream. Bytes from the stream are buffered until the requested * size is available, and the full block can be returned. **/ class ORTHANC_PUBLIC StreamBlockReader : public boost::noncopyable { private: std::istream& stream_; std::string block_; size_t blockPos_; uint64_t processedBytes_; public: explicit StreamBlockReader(std::istream& stream); /** * Schedule the size of the next block to be extracted from the * stream. **/ void Schedule(size_t blockSize); /** * Extract the block whose size was configured by the previous * call to "Schedule()". Returns "false" iff not enough bytes are * available from the stream yet: In this case, try again later. **/ bool Read(std::string& block); uint64_t GetProcessedBytes() const; }; }