mlCTUDimensionInfoSupport.h

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/*************************************************************************************
**
** Copyright 2018, MeVis Medical Solutions AG
**
** The user may use this file in accordance with the license agreement provided with
** the Software or, alternatively, in accordance with the terms contained in a
** written agreement between the user and MeVis Medical Solutions AG.
**
** For further information use the contact form at https://www.mevislab.de/contact
**
**************************************************************************************/
 
 
 
#pragma once
 
#include <mlTypeDefs.h>
#include <ThirdPartyWarningsDisable.h>
#include <vector>
#include <ThirdPartyWarningsRestore.h>
 
ML_START_NAMESPACE
 
//----------------------------------------------------------------------------------
 
//----------------------------------------------------------------------------------
template <class T>
void AdjustDimensionInfos (std::vector<T> &dimInfo, MLssize_t newStartPos, size_t newSize, size_t oldSize, T defaultValue = T{})
{
  // Dim info specified and size changed?
  if (!dimInfo.empty() && (newStartPos || newSize != oldSize))
  {
    // Dim info has valid size?
    if (dimInfo.size() == oldSize)
    {
      auto it = dimInfo.begin();
      if (newStartPos > 0)
      {
        // cast is now always ok
        if (static_cast<size_t>(newStartPos) < oldSize){
          // Remove first pos entries
          dimInfo.erase(it, it+newStartPos);
        }
        else{
          // Remove all entries
          dimInfo.clear();
        }
      }
      else if (newStartPos < 0){
        // Insert pos entries at beginning
        dimInfo.insert(it, static_cast<size_t>(-newStartPos), defaultValue);
      }
      // Set size
      dimInfo.resize(newSize, defaultValue);
    }
    else{
      // Size of dim info invalid, discard
      dimInfo.clear();
    }
  }
}
 
ML_END_NAMESPACE