Mercurial > hg > orthanc
view OrthancFramework/Sources/DicomFormat/StreamBlockReader.cpp @ 4377:4770ac7287ec
integration varian->mainline
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 17 Dec 2020 11:42:48 +0100 |
parents | 785a2713323e |
children | d9473bd5ed43 |
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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) 2017-2020 Osimis S.A., 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/>. **/ #include "../PrecompiledHeaders.h" #include "StreamBlockReader.h" #include "../OrthancException.h" namespace Orthanc { StreamBlockReader::StreamBlockReader(std::istream& stream) : stream_(stream), blockPos_(0), processedBytes_(0) { } void StreamBlockReader::Schedule(size_t blockSize) { if (!block_.empty()) { throw OrthancException(ErrorCode_BadSequenceOfCalls); } else { block_.resize(blockSize); blockPos_ = 0; } } bool StreamBlockReader::Read(std::string& block) { if (block_.empty()) { if (blockPos_ != 0) { throw OrthancException(ErrorCode_BadSequenceOfCalls); } block.clear(); return true; } else { while (blockPos_ < block_.size()) { size_t remainingBytes = block_.size() - blockPos_; std::streamsize r = stream_.readsome(&block_[blockPos_], remainingBytes); if (r == 0) { return false; } else { blockPos_ += r; } } processedBytes_ += block_.size(); block.swap(block_); block_.clear(); return true; } } uint64_t StreamBlockReader::GetProcessedBytes() const { return processedBytes_; } }