ArhReader.cc 3.56 KB
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//
// Software License for AMDiS
//
// Copyright (c) 2010 Dresden University of Technology 
// All rights reserved.
// Authors: Simon Vey, Thomas Witkowski et al.
//
// This file is part of AMDiS
//
// See also license.opensource.txt in the distribution.


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#include <fstream>
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#include <stdint.h>
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#include "ArhReader.h"
#include "Mesh.h"
#include "MeshStructure.h"
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#include "Traverse.h"
#include "DOFVector.h"
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namespace AMDiS {
  
  using namespace std;

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  void ArhReader::read(std::string filename, Mesh *mesh)
  {
    std::vector<DOFVector<double>*> vecs(0);
    ArhReader::read(filename, mesh, vecs);
  }


  void ArhReader::read(std::string filename, Mesh *mesh, DOFVector<double>* vec)
  {
    std::vector<DOFVector<double>*> vecs(1);
    vecs[0] = vec;
    
    ArhReader::read(filename, mesh, vecs);
  }


  void ArhReader::read(string filename, Mesh *mesh, 
		       std::vector<DOFVector<double>*> vecs)
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  {
    FUNCNAME("ArhReader::read()");

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    RefinementManager *refManager = NULL;
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    switch (mesh->getDim()) {
    case 2:
      refManager = new RefinementManager2d();
      break;
    case 3:
      refManager = new RefinementManager3d();
      break;
    default:
      ERROR_EXIT("Should not happen!\n");
    }

    ifstream file;
    file.open(filename.c_str(), ios::in | ios::binary);

    string typeId = "";
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    uint32_t nMacroElements = 0;
    uint32_t nValueVectors = 0;
    uint32_t nAllValues = 0;
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    file.read(const_cast<char*>(typeId.data()), 4);
    file.read(reinterpret_cast<char*>(&nMacroElements), 4);
    file.read(reinterpret_cast<char*>(&nValueVectors), 4);
    file.read(reinterpret_cast<char*>(&nAllValues), 4);

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    TEST_EXIT(nValueVectors == vecs.size())
      ("File has %d vectors, but %d DOFVectors are provided!\n", 
       nValueVectors, vecs.size());

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    for (unsigned int i = 0; i < nMacroElements; i++) {
      uint32_t elIndex = 0;
      uint32_t nStructureCodes = 0;
      uint32_t codeSize = 0;
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      file.read(reinterpret_cast<char*>(&elIndex), 4);
      file.read(reinterpret_cast<char*>(&nStructureCodes), 4);
      file.read(reinterpret_cast<char*>(&codeSize), 4);

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      vector<uint64_t> structureCode(nStructureCodes);
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      file.read(reinterpret_cast<char*>(&(structureCode[0])), 8 * nStructureCodes);
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      MeshStructure elementStructure;
      elementStructure.init(structureCode, codeSize);
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      elementStructure.fitMeshToStructure(mesh, refManager, false, elIndex);
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      uint32_t nValuesPerVector = 0;
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      file.read(reinterpret_cast<char*>(&nValuesPerVector), 4);

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      for (unsigned int j = 0; j < nValueVectors; j++) {
	vector<double> values(nValuesPerVector);
	file.read(reinterpret_cast<char*>(&(values[0])), 8 * nValuesPerVector);
	setDofValues(elIndex, mesh, values, vecs[j]);
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      }
    }

    file.close();

    MSG("ARH file read from: %s\n", filename.c_str());
  }
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  void ArhReader::setDofValues(int macroElIndex, Mesh *mesh,
			       std::vector<double>& values, DOFVector<double>* vec)
  {
    FUNCNAME("ArhReader::setDofValues()");

    bool macroElement = false;
    int valuePos = 0;
    TraverseStack stack;
    ElInfo *elInfo = stack.traverseFirstOneMacro(mesh, macroElIndex, -1,
						 Mesh::CALL_EVERY_EL_PREORDER);
    while (elInfo) {
      if (!macroElement) {
	Element *mEl = elInfo->getMacroElement()->getElement();
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	for (int i = 0; i < mesh->getGeo(VERTEX); i++)
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	  (*vec)[mEl->getDof(i, 0)] = values[valuePos++];	
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	macroElement = true;
      }

      Element *el = elInfo->getElement();
      if (!el->isLeaf())
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	(*vec)[el->getChild(0)->getDof(mesh->getDim(), 0)] = values[valuePos++];
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      elInfo = stack.traverseNext(elInfo);
    }
  }
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}