--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/SourceDicomInstance.cpp	Mon Sep 17 11:34:55 2018 +0200
@@ -0,0 +1,72 @@
+/**
+ * Transfers accelerator plugin for Orthanc
+ * Copyright (C) 2018 Osimis, Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Affero General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#include "SourceDicomInstance.h"
+
+#include <Core/Logging.h>
+#include <Core/Toolbox.h>
+#include <Plugins/Samples/Common/OrthancPluginCppWrapper.h>
+
+
+namespace OrthancPlugins
+{
+  SourceDicomInstance::SourceDicomInstance(OrthancPluginContext* context,
+                                           const std::string& instanceId) :
+    context_(context)
+  {
+    LOG(INFO) << "Transfers accelerator reading DICOM instance: " << instanceId;
+      
+    MemoryBuffer buffer(context);
+    buffer.GetDicomInstance(instanceId);
+
+    info_.reset(new DicomInstanceInfo(instanceId, buffer));
+
+    buffer_ = buffer.Release();
+  }
+
+  
+  SourceDicomInstance::~SourceDicomInstance()
+  {
+    OrthancPluginFreeMemoryBuffer(context_, &buffer_);
+  }
+
+
+  const DicomInstanceInfo& SourceDicomInstance::GetInfo() const
+  {
+    assert(info_.get() != NULL);
+    return *info_;
+  }
+
+
+  void SourceDicomInstance::GetChunk(std::string& target /* out */,
+                                     std::string& md5 /* out */,
+                                     size_t offset,
+                                     size_t size) const
+  {
+    if (offset + size > buffer_.size)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
+    }
+
+    const char* start = reinterpret_cast<const char*>(buffer_.data) + offset;
+    target.assign(start, start + size);
+
+    Orthanc::Toolbox::ComputeMD5(md5, start, size);
+  }
+}