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annotate OrthancFramework/Sources/Compression/ZipWriter.h @ 5853:4d932683049d get-scu tip

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very first implementation of C-Get SCU
author Alain Mazy <am@orthanc.team>
date Tue, 29 Oct 2024 17:25:49 +0100
parents f7adfb22e20e
children
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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) 2017-2023 Osimis S.A., Belgium
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6 * Copyright (C) 2024-2024 Orthanc Team SRL, Belgium
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7 * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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8 *
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9 * This program is free software: you can redistribute it and/or
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10 * modify it under the terms of the GNU Lesser General Public License
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11 * as published by the Free Software Foundation, either version 3 of
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12 * the License, or (at your option) any later version.
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13 *
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14 * This program is distributed in the hope that it will be useful, but
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15 * WITHOUT ANY WARRANTY; without even the implied warranty of
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16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 * Lesser General Public License for more details.
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18 *
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19 * You should have received a copy of the GNU Lesser General Public
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20 * License along with this program. If not, see
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21 * <http://www.gnu.org/licenses/>.
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22 **/
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25 #pragma once
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27 #include "../OrthancFramework.h"
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29 #if !defined(ORTHANC_ENABLE_ZLIB)
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30 # error The macro ORTHANC_ENABLE_ZLIB must be defined
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31 #endif
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33 #if ORTHANC_ENABLE_ZLIB != 1
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34 # error ZLIB support must be enabled to include this file
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35 #endif
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36
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37 #if ORTHANC_BUILD_UNIT_TESTS == 1
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38 # include <gtest/gtest_prod.h>
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39 #endif
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40
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41 #include "../ChunkedBuffer.h"
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42 #include "../Compatibility.h"
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45 #include <stdint.h>
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46 #include <string>
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47 #include <boost/noncopyable.hpp>
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48 #include <boost/shared_ptr.hpp>
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50 namespace Orthanc
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51 {
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52 class ORTHANC_PUBLIC ZipWriter : public boost::noncopyable
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53 {
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54 #if ORTHANC_BUILD_UNIT_TESTS == 1
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55 FRIEND_TEST(ZipWriter, BufferWithSeek);
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56 #endif
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57
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58 public:
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59 // New in Orthanc 1.9.4
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60 class ORTHANC_PUBLIC IOutputStream : public boost::noncopyable
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61 {
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62 public:
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63 virtual ~IOutputStream()
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64 {
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65 }
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66
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67 virtual void Write(const std::string& chunk) = 0;
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68
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69 virtual void Close() = 0;
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71 virtual uint64_t GetArchiveSize() const = 0;
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72 };
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73
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74
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75 // The lifetime of the "target" buffer must be larger than that of ZipWriter
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76 class ORTHANC_PUBLIC MemoryStream : public IOutputStream
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77 {
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78 private:
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79 std::string& target_;
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80 ChunkedBuffer chunked_;
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81 uint64_t archiveSize_;
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82
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83 public:
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84 explicit MemoryStream(std::string& target);
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86 virtual void Write(const std::string& chunk) ORTHANC_OVERRIDE;
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87
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88 virtual void Close() ORTHANC_OVERRIDE;
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90 virtual uint64_t GetArchiveSize() const ORTHANC_OVERRIDE;
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91 };
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94 private:
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95 // This class is only public for unit tests
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96 class ORTHANC_PUBLIC BufferWithSeek : public boost::noncopyable
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97 {
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98 private:
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99 size_t currentPosition_;
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100 ChunkedBuffer chunks_;
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101 std::string flattened_;
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102
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103 void CheckInvariants() const;
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104
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105 public:
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106 BufferWithSeek();
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107
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108 ~BufferWithSeek();
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109
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110 size_t GetPosition() const;
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111
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112 size_t GetSize() const;
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113
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114 void Write(const void* data,
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115 size_t size);
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116
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117 void Write(const std::string& data);
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118
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119 void Seek(size_t position);
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120
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121 void Flush(std::string& target);
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122 };
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123
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124
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125 private:
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126 class StreamBuffer;
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127
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128 struct PImpl;
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129 boost::shared_ptr<PImpl> pimpl_;
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130
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131 bool isZip64_;
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132 bool hasFileInZip_;
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133 bool append_;
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134 uint8_t compressionLevel_;
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135 std::string path_;
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136
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137 std::unique_ptr<IOutputStream> outputStream_;
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138
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139 public:
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140 ZipWriter();
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141
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142 ~ZipWriter();
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143
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144 void SetZip64(bool isZip64);
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145
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146 bool IsZip64() const;
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147
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148 void SetCompressionLevel(uint8_t level);
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149
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150 uint8_t GetCompressionLevel() const;
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151
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152 void SetAppendToExisting(bool append);
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153
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154 bool IsAppendToExisting() const;
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155
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156 void Open();
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157
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158 void Close();
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159
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160 bool IsOpen() const;
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161
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162 void SetOutputPath(const char* path);
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163
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164 const std::string& GetOutputPath() const;
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165
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166 void OpenFile(const char* path);
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167
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168 void Write(const void* data, size_t length);
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169
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170 void Write(const std::string& data);
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171
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172 void AcquireOutputStream(IOutputStream* stream, // transfers ownership
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173 bool isZip64);
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174
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175 // The lifetime of the "target" buffer must be larger than that of ZipWriter
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176 void SetMemoryOutput(std::string& target,
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177 bool isZip64);
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178
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179 void CancelStream();
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181 // WARNING: "GetArchiveSize()" only has its final value after
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182 // "Close()" has been called
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183 uint64_t GetArchiveSize() const;
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184 };
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185 }