IVGCVSW-2607 Refactor range tracking into own class

Change-Id: I1b409e5dac7922859e04a554893b982afc5ad1e7
Signed-off-by: Derek Lamberti <derek.lamberti@arm.com>
diff --git a/src/armnn/RangeTracker.cpp b/src/armnn/RangeTracker.cpp
new file mode 100644
index 0000000..2025103
--- /dev/null
+++ b/src/armnn/RangeTracker.cpp
@@ -0,0 +1,32 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include "RangeTracker.hpp"
+
+namespace armnn
+{
+
+void RangeTracker::SetRange(const armnn::IConnectableLayer *layer, unsigned int outputIdx, float min, float max)
+{
+    auto& ranges = m_GuidToRangesMap[layer->GetGuid()];
+
+    if (ranges.size() < layer->GetNumOutputSlots())
+    {
+        ranges.resize(layer->GetNumOutputSlots());
+    }
+    ranges[outputIdx] = std::make_pair(min, max);
+}
+
+RangeTracker::MinMaxRange RangeTracker::GetRange(armnn::LayerGuid guid, unsigned int idx) const
+{
+    auto search = m_GuidToRangesMap.find(guid);
+    if (search == m_GuidToRangesMap.end())
+    {
+        return DefaultRange();
+    }
+    return search->second.at(idx);
+}
+
+} //namespace armnn
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