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annotate OrthancFramework/Sources/Compression/DeflateBaseCompressor.cpp @ 4297:785a2713323e

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 05 Nov 2020 17:20:49 +0100
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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) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Lesser General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Lesser General Public
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18 * License along with this program. If not, see
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19 * <http://www.gnu.org/licenses/>.
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20 **/
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21
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22
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23 #include "../PrecompiledHeaders.h"
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24 #include "DeflateBaseCompressor.h"
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25
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26 #include "../OrthancException.h"
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27 #include "../Logging.h"
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28
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29 #include <string.h>
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30
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31 namespace Orthanc
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32 {
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33 DeflateBaseCompressor::DeflateBaseCompressor() :
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34 compressionLevel_(6),
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35 prefixWithUncompressedSize_(false)
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36 {
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37 }
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38
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39
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40 void DeflateBaseCompressor::SetCompressionLevel(uint8_t level)
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41 {
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42 if (level >= 10)
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43 {
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44 throw OrthancException(ErrorCode_ParameterOutOfRange,
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45 "Zlib compression level must be between 0 (no compression) and 9 (highest compression)");
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46 }
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47
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48 compressionLevel_ = level;
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49 }
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51
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52 uint64_t DeflateBaseCompressor::ReadUncompressedSizePrefix(const void* compressed,
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53 size_t compressedSize)
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54 {
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55 if (compressedSize == 0)
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56 {
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57 return 0;
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58 }
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59
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60 if (compressedSize < sizeof(uint64_t))
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61 {
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62 throw OrthancException(ErrorCode_CorruptedFile, "The compressed buffer is ill-formed");
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63 }
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64
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65 uint64_t size;
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66 memcpy(&size, compressed, sizeof(uint64_t));
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67
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68 return size;
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69 }
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70
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71
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72 void DeflateBaseCompressor::SetPrefixWithUncompressedSize(bool prefix)
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73 {
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74 prefixWithUncompressedSize_ = prefix;
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75 }
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77 bool DeflateBaseCompressor::HasPrefixWithUncompressedSize() const
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78 {
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79 return prefixWithUncompressedSize_;
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80 }
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82 uint8_t DeflateBaseCompressor::GetCompressionLevel() const
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83 {
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84 return compressionLevel_;
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85 }
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86 }