CompareHdf5ResultsFiles.cpp

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#include "CompareHdf5ResultsFiles.hpp"

#include <iostream>
#include <vector>
#include "petscvec.h"
#include "Hdf5DataReader.hpp"
#include "DistributedVectorFactory.hpp"

bool CompareFilesViaHdf5DataReader(std::string pathname1, std::string filename1, bool makeAbsolute1,
                                   std::string pathname2, std::string filename2, bool makeAbsolute2,
                                   double tol, std::string datasetName)
{
    Hdf5DataReader reader1(pathname1, filename1, makeAbsolute1, datasetName);
    Hdf5DataReader reader2(pathname2, filename2, makeAbsolute2, datasetName);

    unsigned number_nodes1 = reader1.GetNumberOfRows();
    unsigned number_nodes2 = reader2.GetNumberOfRows();
    if (number_nodes1 != number_nodes2)
    {
        std::cout << "Number of nodes " << number_nodes1 << " and " << number_nodes2 << " don't match\n";
        return false;
    }

    // Check the variable names and units
    std::vector<std::string> variable_names1 = reader1.GetVariableNames();
    std::vector<std::string> variable_names2 = reader2.GetVariableNames();
    std::string unlimited_variable1 = reader1.GetUnlimitedDimensionName();
    std::string unlimited_variable2 = reader2.GetUnlimitedDimensionName();
    std::string unlimited_variable_unit1 = reader1.GetUnlimitedDimensionUnit();
    std::string unlimited_variable_unit2 = reader2.GetUnlimitedDimensionUnit();

    unsigned num_vars = variable_names1.size();
    if (num_vars != variable_names2.size())
    {
        std::cout << "Number of variables " << variable_names1.size()
                  << " and " << variable_names2.size() << " don't match\n";
        return false;
    }
    if (unlimited_variable1 != unlimited_variable2)
    {
        std::cout << "Unlimited variable names " << unlimited_variable1 << " and "
                  << unlimited_variable2 << " don't match\n";
        return false;
    }
    if (unlimited_variable_unit1 != unlimited_variable_unit2)
    {
        std::cout << "Unlimited variable units " << unlimited_variable_unit1 << " and "
                  << unlimited_variable_unit2 << " don't match\n";
        return false;
    }
    for (unsigned var=0; var<num_vars; var++)
    {
        std::string var_name = variable_names1[var];
        if (var_name != variable_names2[var])
        {
            std::cout << "Variable names " << var_name << " and "
                      << variable_names2[var] << " don't match\n";
            return false;
        }
        if (reader1.GetUnit(var_name) != reader2.GetUnit(var_name))
        {
            std::cout << "Units names " << reader1.GetUnit(var_name)
                      << " and " << reader2.GetUnit(var_name) << " don't match\n";
            return false;
        }
    }

    // Check the timestep vectors
    std::vector<double> times1 = reader1.GetUnlimitedDimensionValues();
    std::vector<double> times2 = reader2.GetUnlimitedDimensionValues();

    if (times1.size() != times2.size())
    {
        std::cout << "Number of time steps " << times1.size()
                  << " and " << times2.size() << " don't match\n";
        return false;
    }

    for (unsigned timestep=0; timestep<times1.size(); timestep++)
    {
        if (fabs(times1[timestep]-times2[timestep]) > 1e-8)
        {
            std::cout << "Time steps " << times1[timestep]
                      << " and " << times2[timestep] << " don't match\n";
            return false;
        }
    }

    bool is_complete1 = reader1.IsDataComplete();
    bool is_complete2 = reader2.IsDataComplete();

    if (is_complete1 != is_complete2)
    {
        std::cout<<"One of the readers has incomplete data and the other doesn't\n";
        return false;
    }

    if (is_complete1)
    {
        DistributedVectorFactory factory(number_nodes1);

        Vec data1 = factory.CreateVec();
        Vec data2 = factory.CreateVec();

        for (unsigned timestep=0; timestep<times1.size(); timestep++)
        {
            for (unsigned var=0; var<num_vars; var++)
            {
                reader1.GetVariableOverNodes(data1, variable_names1[var], timestep);
                reader2.GetVariableOverNodes(data2, variable_names2[var], timestep);

#if (PETSC_VERSION_MAJOR == 2 && PETSC_VERSION_MINOR == 2) //PETSc 2.2
                double minus_one = -1.0;
                VecAXPY(&minus_one, data2, data1);
#else
                //[note: VecAXPY(y,a,x) computes y = ax+y]
                VecAXPY(data1, -1.0, data2);
#endif

                PetscReal difference_norm;
                VecNorm(data1, NORM_2, &difference_norm);

                if (difference_norm > tol)
                {
                    std::cout << "Time " << times1[timestep] << ": vectors differ in NORM_2 by " << difference_norm << std::endl;
                    return false;
                }
            }
        }
        PetscTools::Destroy(data1);
        PetscTools::Destroy(data2);
    }
    else
    {
        // Incomplete data

        // Check the index vectors
        std::vector<unsigned> indices1 = reader1.GetIncompleteNodeMap();
        std::vector<unsigned> indices2 = reader2.GetIncompleteNodeMap();

        if (indices1.size() != indices2.size())
        {
            std::cout << "Index map sizes " << indices1.size() << " and " << indices2.size() << " don't match\n";
            return false;
        }

        for (unsigned index=0; index<indices1.size(); index++)
        {
            if (indices1[index]!=indices2[index])
            {
               std::cout << "Time steps " << indices1[index] << " and " << indices2[index] << " don't match\n";
               return false;
            }
        }

        // Check all the data
        for (unsigned index=0; index<indices1.size(); index++)
        {
            unsigned node_index = indices1[index];
            for (unsigned var=0; var<num_vars; var++)
            {
                std::vector<double> var_over_time1 = reader1.GetVariableOverTime(variable_names1[var], node_index);
                std::vector<double> var_over_time2 = reader2.GetVariableOverTime(variable_names1[var], node_index);
                for (unsigned time_step=0;time_step< var_over_time1.size(); time_step++)
                {
                    if (fabs(var_over_time1[time_step] - var_over_time2[time_step]) > tol)
                    {
                        std::cout<<"Node "<<node_index<<" at time step "<<time_step<<" variable "<<variable_names1[var]<<
                            " differs ("<<var_over_time1[time_step]<<" != "<<var_over_time2[time_step]<<")\n";
                        return false;
                    }
                }
            }
        }
    }
    return true;
}

bool CompareFilesViaHdf5DataReaderGlobalNorm(std::string pathname1, std::string filename1, bool makeAbsolute1,
                                             std::string pathname2, std::string filename2, bool makeAbsolute2,
                                             double tol, std::string datasetName)
{
    Hdf5DataReader reader1(pathname1, filename1, makeAbsolute1, datasetName);
    Hdf5DataReader reader2(pathname2, filename2, makeAbsolute2, datasetName);

    unsigned number_nodes1 = reader1.GetNumberOfRows();
    bool is_the_same = true;
    std::vector<std::string> variable_names1 = reader1.GetVariableNames();
    std::vector<std::string> variable_names2 = reader2.GetVariableNames();
    std::vector<double> times1 = reader1.GetUnlimitedDimensionValues();
    unsigned num_vars = variable_names1.size();
    DistributedVectorFactory factory(number_nodes1);

    Vec data1 = factory.CreateVec();
    Vec data2 = factory.CreateVec();

    for (unsigned timestep=0; timestep<times1.size(); timestep++)
    {
        for (unsigned var=0; var<num_vars; var++)
        {
            reader1.GetVariableOverNodes(data1, variable_names1[var], timestep);
            reader2.GetVariableOverNodes(data2, variable_names2[var], timestep);

            PetscReal data1_norm;
            PetscReal data2_norm;
            VecNorm(data1, NORM_2, &data1_norm);
            VecNorm(data2, NORM_2, &data2_norm);
            PetscReal norm = fabs(data1_norm-data2_norm);
            if (norm > tol)
            {
                is_the_same = false;
                std::cout << "Vectors differ in global NORM_2 by " << norm << std::endl;
            }
        }
    }

    PetscTools::Destroy(data1);
    PetscTools::Destroy(data2);

    return is_the_same;
}