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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkParallelReader.h"
#include "vtkInformation.h"
#include "vtkMath.h"
#include "vtkObjectFactory.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include <numeric>
#include <vector>
VTK_ABI_NAMESPACE_BEGIN
struct vtkParallelReaderInternal
{
using FileNamesType = std::vector<std::string>;
FileNamesType FileNames;
};
//------------------------------------------------------------------------------
vtkParallelReader::vtkParallelReader()
{
this->Internal = new vtkParallelReaderInternal;
this->CurrentFileIndex = -1;
}
//------------------------------------------------------------------------------
vtkParallelReader::~vtkParallelReader()
{
delete this->Internal;
}
//------------------------------------------------------------------------------
void vtkParallelReader::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
//------------------------------------------------------------------------------
void vtkParallelReader::AddFileName(const char* fname)
{
if (fname == nullptr || *fname == '\0')
{
return;
}
this->Internal->FileNames.emplace_back(fname);
this->Modified();
}
//------------------------------------------------------------------------------
void vtkParallelReader::ClearFileNames()
{
this->Internal->FileNames.clear();
this->Modified();
}
//------------------------------------------------------------------------------
int vtkParallelReader::GetNumberOfFileNames() const
{
return static_cast<int>(this->Internal->FileNames.size());
}
//------------------------------------------------------------------------------
const char* vtkParallelReader::GetFileName(int i) const
{
return this->Internal->FileNames[i].c_str();
}
//------------------------------------------------------------------------------
const char* vtkParallelReader::GetCurrentFileName() const
{
if (this->CurrentFileIndex < 0 || this->CurrentFileIndex >= (int)this->Internal->FileNames.size())
{
return nullptr;
}
return this->Internal->FileNames[this->CurrentFileIndex].c_str();
}
//------------------------------------------------------------------------------
int vtkParallelReader::ReadMetaData(vtkInformation* metadata)
{
metadata->Set(vtkAlgorithm::CAN_HANDLE_PIECE_REQUEST(), 1);
if (this->Internal->FileNames.empty())
{
// No file names specified. No meta-data. There is still
// no need to return with an error.
return 1;
}
size_t nTimes = this->Internal->FileNames.size();
std::vector<double> times(nTimes);
bool hasTime = true;
auto iter = times.begin();
for (const auto& fname : this->Internal->FileNames)
{
auto time = this->GetTimeValue(fname);
if (vtkMath::IsNan(time))
{
hasTime = false;
break;
}
*iter++ = time;
}
if (!hasTime)
{
std::iota(times.begin(), times.end(), 0);
}
double timeRange[2];
timeRange[0] = times[0];
timeRange[1] = times[nTimes - 1];
metadata->Set(vtkStreamingDemandDrivenPipeline::TIME_STEPS(), times.data(), (int)nTimes);
metadata->Set(vtkStreamingDemandDrivenPipeline::TIME_RANGE(), timeRange, 2);
return 1;
}
//------------------------------------------------------------------------------
int vtkParallelReader::ReadMesh(
int piece, int npieces, int nghosts, int timestep, vtkDataObject* output)
{
int nTimes = static_cast<int>(this->Internal->FileNames.size());
if (timestep >= nTimes)
{
vtkErrorMacro(
"Cannot read time step " << timestep << ". Only " << nTimes << " time steps are available.");
return 0;
}
if (this->ReadMesh(this->Internal->FileNames[timestep], piece, npieces, nghosts, output))
{
this->CurrentFileIndex = timestep;
return 1;
}
return 0;
}
//------------------------------------------------------------------------------
int vtkParallelReader::ReadPoints(
int piece, int npieces, int nghosts, int timestep, vtkDataObject* output)
{
int nTimes = static_cast<int>(this->Internal->FileNames.size());
if (timestep >= nTimes)
{
vtkErrorMacro(
"Cannot read time step " << timestep << ". Only " << nTimes << " time steps are available.");
return 0;
}
return this->ReadPoints(this->Internal->FileNames[timestep], piece, npieces, nghosts, output);
}
//------------------------------------------------------------------------------
int vtkParallelReader::ReadArrays(
int piece, int npieces, int nghosts, int timestep, vtkDataObject* output)
{
int nTimes = static_cast<int>(this->Internal->FileNames.size());
if (timestep >= nTimes)
{
vtkErrorMacro(
"Cannot read time step " << timestep << ". Only " << nTimes << " time steps are available.");
return 0;
}
return this->ReadArrays(this->Internal->FileNames[timestep], piece, npieces, nghosts, output);
}
//------------------------------------------------------------------------------
double vtkParallelReader::GetTimeValue(const std::string&)
{
return vtkMath::Nan();
}
VTK_ABI_NAMESPACE_END
|
