Mercurial > hg > orthanc
view Core/DicomParsing/ParsedDicomDir.cpp @ 3751:89bd08fdd91b
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 16 Mar 2020 11:22:56 +0100 |
parents | 2a170a8f1faf |
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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 General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * In addition, as a special exception, the copyright holders of this * program give permission to link the code of its release with the * OpenSSL project's "OpenSSL" library (or with modified versions of it * that use the same license as the "OpenSSL" library), and distribute * the linked executables. You must obey the GNU General Public License * in all respects for all of the code used other than "OpenSSL". If you * modify file(s) with this exception, you may extend this exception to * your version of the file(s), but you are not obligated to do so. If * you do not wish to do so, delete this exception statement from your * version. If you delete this exception statement from all source files * in the program, then also delete it here. * * 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 * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. **/ #include "../PrecompiledHeaders.h" #include "ParsedDicomDir.h" #include "../Compatibility.h" #include "../OrthancException.h" #include "ParsedDicomFile.h" #include "FromDcmtkBridge.h" #include <dcmtk/dcmdata/dcdeftag.h> namespace Orthanc { void ParsedDicomDir::Clear() { for (size_t i = 0; i < content_.size(); i++) { assert(content_[i] != NULL); delete content_[i]; } } bool ParsedDicomDir::LookupIndexOfOffset(size_t& target, unsigned int offset) const { if (offset == 0) { return false; } OffsetToIndex::const_iterator found = offsetToIndex_.find(offset); if (found == offsetToIndex_.end()) { // Error in the algorithm that computes the offsets throw OrthancException(ErrorCode_InternalError); } else { target = found->second; return true; } } ParsedDicomDir::ParsedDicomDir(const std::string content) { ParsedDicomFile dicom(content); DcmSequenceOfItems* sequence = NULL; if (dicom.GetDcmtkObject().getDataset() == NULL || !dicom.GetDcmtkObject().getDataset()->findAndGetSequence(DCM_DirectoryRecordSequence, sequence).good() || sequence == NULL) { throw OrthancException(ErrorCode_BadFileFormat, "Not a DICOMDIR"); } content_.resize(sequence->card()); nextOffsets_.resize(content_.size()); lowerOffsets_.resize(content_.size()); // Manually reconstruct the list of all the available offsets of // "DcmItem", as "fStartPosition" is a protected member in DCMTK // API std::set<uint32_t> availableOffsets; availableOffsets.insert(0); for (unsigned long i = 0; i < sequence->card(); i++) { DcmItem* item = sequence->getItem(i); if (item == NULL) { Clear(); throw OrthancException(ErrorCode_InternalError); } Uint32 next, lower; if (!item->findAndGetUint32(DCM_OffsetOfTheNextDirectoryRecord, next).good() || !item->findAndGetUint32(DCM_OffsetOfReferencedLowerLevelDirectoryEntity, lower).good()) { item->writeXML(std::cout); throw OrthancException(ErrorCode_BadFileFormat, "Missing offsets in DICOMDIR"); } nextOffsets_[i] = next; lowerOffsets_[i] = lower; std::unique_ptr<DicomMap> entry(new DicomMap); FromDcmtkBridge::ExtractDicomSummary(*entry, *item); if (next != 0) { availableOffsets.insert(next); } if (lower != 0) { availableOffsets.insert(lower); } content_[i] = entry.release(); } if (content_.size() != availableOffsets.size()) { throw OrthancException(ErrorCode_BadFileFormat, "Inconsistent offsets in DICOMDIR"); } unsigned int index = 0; for (std::set<uint32_t>::const_iterator it = availableOffsets.begin(); it != availableOffsets.end(); ++it) { offsetToIndex_[*it] = index; index ++; } } const DicomMap& ParsedDicomDir::GetItem(size_t i) const { if (i >= content_.size()) { throw OrthancException(ErrorCode_ParameterOutOfRange); } else { assert(content_[i] != NULL); return *content_[i]; } } bool ParsedDicomDir::LookupNext(size_t& target, size_t index) const { if (index >= nextOffsets_.size()) { throw OrthancException(ErrorCode_ParameterOutOfRange); } else { return LookupIndexOfOffset(target, nextOffsets_[index]); } } bool ParsedDicomDir::LookupLower(size_t& target, size_t index) const { if (index >= lowerOffsets_.size()) { throw OrthancException(ErrorCode_ParameterOutOfRange); } else { return LookupIndexOfOffset(target, lowerOffsets_[index]); } } }