Mercurial > hg > orthanc
annotate OrthancFramework/Sources/ChunkedBuffer.cpp @ 4201:2d5209153b32
cppcheck
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 17 Sep 2020 08:18:28 +0200 |
parents | 8c559dd5034b |
children | 0034f855c023 |
rev | line source |
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0 | 1 /** |
59 | 2 * Orthanc - A Lightweight, RESTful DICOM Store |
1900 | 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 |
0 | 6 * |
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. |
136 | 11 * |
0 | 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 | |
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15 * Lesser General Public License for more details. |
0 | 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/>. |
0 | 20 **/ |
21 | |
22 | |
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23 #include "PrecompiledHeaders.h" |
0 | 24 #include "ChunkedBuffer.h" |
25 | |
26 #include <cassert> | |
27 #include <string.h> | |
28 | |
29 | |
59 | 30 namespace Orthanc |
0 | 31 { |
32 void ChunkedBuffer::Clear() | |
33 { | |
34 numBytes_ = 0; | |
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35 pendingPos_ = 0; |
0 | 36 |
37 for (Chunks::iterator it = chunks_.begin(); | |
656 | 38 it != chunks_.end(); ++it) |
0 | 39 { |
40 delete *it; | |
41 } | |
42 } | |
43 | |
44 | |
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45 void ChunkedBuffer::AddChunkInternal(const void* chunkData, |
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46 size_t chunkSize) |
0 | 47 { |
48 if (chunkSize == 0) | |
49 { | |
50 return; | |
51 } | |
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52 else |
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53 { |
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54 assert(chunkData != NULL); |
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55 chunks_.push_back(new std::string(reinterpret_cast<const char*>(chunkData), chunkSize)); |
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56 numBytes_ += chunkSize; |
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57 } |
0 | 58 } |
59 | |
60 | |
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61 void ChunkedBuffer::FlushPendingBuffer() |
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62 { |
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63 assert(pendingPos_ <= pendingBuffer_.size()); |
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64 |
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65 if (!pendingBuffer_.empty()) |
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66 { |
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67 AddChunkInternal(pendingBuffer_.c_str(), pendingPos_); |
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68 } |
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69 else |
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70 { |
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71 assert(pendingPos_ == 0); |
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72 } |
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73 |
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74 pendingPos_ = 0; |
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75 } |
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76 |
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77 |
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78 ChunkedBuffer::ChunkedBuffer() : |
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79 numBytes_(0), |
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80 pendingPos_(0) |
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81 { |
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82 pendingBuffer_.resize(16 * 1024); // Default size of the pending buffer: 16KB |
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83 } |
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84 |
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85 |
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86 void ChunkedBuffer::SetPendingBufferSize(size_t size) |
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87 { |
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88 FlushPendingBuffer(); |
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89 pendingBuffer_.resize(size); |
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90 } |
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91 |
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92 |
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93 void ChunkedBuffer::AddChunk(const void* chunkData, |
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94 size_t chunkSize) |
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95 { |
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96 if (chunkSize > 0) |
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97 { |
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98 #if 1 |
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99 assert(sizeof(char) == 1); |
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100 |
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101 // Optimization if Orthanc >= 1.7.3, to speed up in the presence of many small chunks |
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102 if (pendingPos_ + chunkSize <= pendingBuffer_.size()) |
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103 { |
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104 // There remains enough place in the pending buffer |
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105 memcpy(&pendingBuffer_[pendingPos_], chunkData, chunkSize); |
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106 pendingPos_ += chunkSize; |
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107 } |
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108 else |
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109 { |
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110 FlushPendingBuffer(); |
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111 |
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112 if (!pendingBuffer_.empty() && |
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113 chunkSize < pendingBuffer_.size()) |
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114 { |
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115 memcpy(&pendingBuffer_[0], chunkData, chunkSize); |
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116 pendingPos_ = chunkSize; |
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117 } |
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118 else |
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119 { |
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120 AddChunkInternal(chunkData, chunkSize); |
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121 } |
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122 } |
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123 #else |
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124 // Non-optimized implementation in Orthanc <= 1.7.2 |
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125 AddChunkInternal(chunkData, chunkSize); |
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126 #endif |
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127 } |
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128 } |
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129 |
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130 |
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131 void ChunkedBuffer::AddChunk(const std::string& chunk) |
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132 { |
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133 if (chunk.size() > 0) |
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134 { |
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135 AddChunk(&chunk[0], chunk.size()); |
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136 } |
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137 } |
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138 |
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139 |
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140 void ChunkedBuffer::AddChunk(const std::string::const_iterator& begin, |
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141 const std::string::const_iterator& end) |
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142 { |
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143 const size_t s = end - begin; |
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144 |
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145 if (s > 0) |
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146 { |
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147 AddChunk(&begin[0], s); |
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148 } |
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149 } |
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150 |
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151 |
0 | 152 void ChunkedBuffer::Flatten(std::string& result) |
153 { | |
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154 FlushPendingBuffer(); |
0 | 155 result.resize(numBytes_); |
156 | |
157 size_t pos = 0; | |
158 for (Chunks::iterator it = chunks_.begin(); | |
656 | 159 it != chunks_.end(); ++it) |
0 | 160 { |
161 assert(*it != NULL); | |
162 | |
163 size_t s = (*it)->size(); | |
164 if (s != 0) | |
165 { | |
166 memcpy(&result[pos], (*it)->c_str(), s); | |
167 pos += s; | |
168 } | |
169 | |
170 delete *it; | |
171 } | |
172 | |
173 chunks_.clear(); | |
1921 | 174 numBytes_ = 0; |
0 | 175 } |
176 } |