69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
/**
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* Orthanc - A Lightweight, RESTful DICOM Store
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* Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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* Department, University Hospital of Liege, Belgium
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* Copyright (C) 2017-2023 Osimis S.A., Belgium
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* Copyright (C) 2024-2025 Orthanc Team SRL, Belgium
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* Copyright (C) 2021-2025 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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*
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* This program is free software: you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program. If not, see
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* <http://www.gnu.org/licenses/>.
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**/
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#pragma once
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#include "../OrthancFramework.h" // For ORTHANC_PUBLIC
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#include <boost/noncopyable.hpp>
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#include <istream>
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#include <stdint.h>
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#include <string>
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namespace Orthanc
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{
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/**
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* This class is used to extract blocks of given size from a
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* stream. Bytes from the stream are buffered until the requested
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* size is available, and the full block can be returned.
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**/
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class ORTHANC_PUBLIC StreamBlockReader : public boost::noncopyable
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{
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private:
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std::istream& stream_;
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std::string block_;
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size_t blockPos_;
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uint64_t processedBytes_;
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public:
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explicit StreamBlockReader(std::istream& stream);
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/**
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* Schedule the size of the next block to be extracted from the
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* stream.
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**/
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void Schedule(size_t blockSize);
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/**
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* Extract the block whose size was configured by the previous
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* call to "Schedule()". Returns "false" iff not enough bytes are
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* available from the stream yet: In this case, try again later.
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**/
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bool Read(std::string& block);
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uint64_t GetProcessedBytes() const;
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};
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}
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