1 /** 2 * Orthanc - A Lightweight, RESTful DICOM Store 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics 4 * Department, University Hospital of Liege, Belgium 5 * Copyright (C) 2017-2020 Osimis S.A., Belgium 6 * 7 * This program is free software: you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public License 9 * as published by the Free Software Foundation, either version 3 of 10 * the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with this program. If not, see 19 * <http://www.gnu.org/licenses/>. 20 **/ 21 22 23 #include "../PrecompiledHeaders.h" 24 #include "DeflateBaseCompressor.h" 25 26 #include "../OrthancException.h" 27 #include "../Logging.h" 28 29 #include <string.h> 30 31 namespace Orthanc 32 { DeflateBaseCompressor()33 DeflateBaseCompressor::DeflateBaseCompressor() : 34 compressionLevel_(6), 35 prefixWithUncompressedSize_(false) 36 { 37 } 38 39 SetCompressionLevel(uint8_t level)40 void DeflateBaseCompressor::SetCompressionLevel(uint8_t level) 41 { 42 if (level >= 10) 43 { 44 throw OrthancException(ErrorCode_ParameterOutOfRange, 45 "Zlib compression level must be between 0 (no compression) and 9 (highest compression)"); 46 } 47 48 compressionLevel_ = level; 49 } 50 51 ReadUncompressedSizePrefix(const void * compressed,size_t compressedSize)52 uint64_t DeflateBaseCompressor::ReadUncompressedSizePrefix(const void* compressed, 53 size_t compressedSize) 54 { 55 if (compressedSize == 0) 56 { 57 return 0; 58 } 59 60 if (compressedSize < sizeof(uint64_t)) 61 { 62 throw OrthancException(ErrorCode_CorruptedFile, "The compressed buffer is ill-formed"); 63 } 64 65 uint64_t size; 66 memcpy(&size, compressed, sizeof(uint64_t)); 67 68 return size; 69 } 70 71 SetPrefixWithUncompressedSize(bool prefix)72 void DeflateBaseCompressor::SetPrefixWithUncompressedSize(bool prefix) 73 { 74 prefixWithUncompressedSize_ = prefix; 75 } 76 HasPrefixWithUncompressedSize() const77 bool DeflateBaseCompressor::HasPrefixWithUncompressedSize() const 78 { 79 return prefixWithUncompressedSize_; 80 } 81 GetCompressionLevel() const82 uint8_t DeflateBaseCompressor::GetCompressionLevel() const 83 { 84 return compressionLevel_; 85 } 86 } 87