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annotate OrthancFramework/Sources/Compression/DeflateBaseCompressor.cpp @ 5052:e2dece12f444

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author Alain Mazy <am@osimis.io>
date Thu, 30 Jun 2022 17:11:08 +0200
parents 43e613a7756b
children 0ea402b4d901
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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 #include "../PrecompiledHeaders.h"
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25 #include "DeflateBaseCompressor.h"
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26
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27 #include "../OrthancException.h"
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28 #include "../Logging.h"
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29
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30 #include <string.h>
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31
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32 namespace Orthanc
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33 {
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34 DeflateBaseCompressor::DeflateBaseCompressor() :
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35 compressionLevel_(6),
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36 prefixWithUncompressedSize_(false)
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37 {
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38 }
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39
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40
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41 void DeflateBaseCompressor::SetCompressionLevel(uint8_t level)
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42 {
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43 if (level >= 10)
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44 {
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45 throw OrthancException(ErrorCode_ParameterOutOfRange,
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46 "Zlib compression level must be between 0 (no compression) and 9 (highest compression)");
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47 }
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48
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49 compressionLevel_ = level;
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50 }
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52
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53 uint64_t DeflateBaseCompressor::ReadUncompressedSizePrefix(const void* compressed,
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54 size_t compressedSize)
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55 {
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56 if (compressedSize == 0)
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57 {
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58 return 0;
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59 }
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60
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61 if (compressedSize < sizeof(uint64_t))
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62 {
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63 throw OrthancException(ErrorCode_CorruptedFile, "The compressed buffer is ill-formed");
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64 }
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65
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66 uint64_t size;
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67 memcpy(&size, compressed, sizeof(uint64_t));
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68
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69 return size;
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70 }
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71
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72
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73 void DeflateBaseCompressor::SetPrefixWithUncompressedSize(bool prefix)
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74 {
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75 prefixWithUncompressedSize_ = prefix;
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76 }
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78 bool DeflateBaseCompressor::HasPrefixWithUncompressedSize() const
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79 {
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80 return prefixWithUncompressedSize_;
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81 }
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82
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83 uint8_t DeflateBaseCompressor::GetCompressionLevel() const
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84 {
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85 return compressionLevel_;
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86 }
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87 }