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#include "vtkGenericIOUtilities.h"
// VTK includes
#include "vtkDataArray.h"
#include "vtkMPI.h"
#include "vtkMPICommunicator.h"
#include "vtkMPIController.h"
#include "vtkMultiProcessController.h"
// GenericIO includes
#include "GenericIOMPIReader.h"
#include "GenericIOPosixReader.h"
#include "GenericIOMPIWriter.h"
// C/C++ includes
#include <cassert>
// MPI
#include <mpi.h>
namespace vtkGenericIOUtilities
{
//==============================================================================
MPI_Comm GetMPICommunicator(vtkMultiProcessController *mpc)
{
assert("pre: null multiprocess controller!" && (mpc != NULL) );
MPI_Comm comm = MPI_COMM_NULL;
// STEP 0: Get the communicator from the controller
vtkCommunicator *vtkComm = mpc->GetCommunicator();
assert("pre: VTK communicator is NULL" && (vtkComm != NULL) );
// STEP 1: Safe downcast to an vtkMPICommunicator
vtkMPICommunicator* vtkMPIComm = vtkMPICommunicator::SafeDownCast(vtkComm);
assert("pre: MPI communicator is NULL" && (vtkMPIComm != NULL) );
// STEP 2: Get the opaque VTK MPI communicator
vtkMPICommunicatorOpaqueComm* mpiComm = vtkMPIComm->GetMPIComm();
assert("pre: Opaque MPI communicator is NULL" && (mpiComm != NULL) );
// STEP 3: Finally, get the MPI comm
comm = *(mpiComm->GetHandle());
return( comm );
}
//==============================================================================
vtkDataArray* GetVtkDataArray(
std::string name, int type, void* rawBuffer, int N)
{
assert("pre: cannot read from null buffer!" && (rawBuffer != NULL) );
vtkDataArray *dataArray = NULL;
size_t dataSize = 0;
switch( type )
{
case gio::GENERIC_IO_INT32_TYPE:
dataArray = vtkDataArray::CreateDataArray(VTK_TYPE_INT32);
dataSize = sizeof(vtkTypeInt32);
break;
case gio::GENERIC_IO_INT64_TYPE:
dataArray = vtkDataArray::CreateDataArray(VTK_TYPE_INT64);
// i.e., don't run this on windows
assert(sizeof(vtkTypeInt64) == sizeof(uint64_t) );
dataSize = sizeof(vtkTypeInt64);
break;
case gio::GENERIC_IO_UINT32_TYPE:
dataArray = vtkDataArray::CreateDataArray(VTK_TYPE_UINT32);
dataSize = sizeof(vtkTypeUInt32);
break;
case gio::GENERIC_IO_UINT64_TYPE:
dataArray = vtkDataArray::CreateDataArray(VTK_TYPE_UINT64);
// i.e., don't run this on windows
assert(sizeof(vtkTypeUInt64) == sizeof(uint64_t) );
dataSize = sizeof(vtkTypeUInt64);
break;
case gio::GENERIC_IO_DOUBLE_TYPE:
dataArray = vtkDataArray::CreateDataArray(VTK_DOUBLE);
dataSize = sizeof(double);
break;
case gio::GENERIC_IO_FLOAT_TYPE:
dataArray = vtkDataArray::CreateDataArray(VTK_FLOAT);
dataSize = sizeof(float);
break;
default:
dataSize = 0;
return NULL;
} // END switch
assert("pre: null data array!" && (dataArray != NULL) );
dataArray->SetNumberOfComponents(1);
dataArray->SetNumberOfTuples( N );
dataArray->SetName(name.c_str());
if (N > 0)
{
void *dataBuffer = dataArray->GetVoidPointer(0);
assert("pre: encountered NULL data buffer!" && (dataBuffer != NULL) );
memcpy(dataBuffer,rawBuffer,N*dataSize);
}
return( dataArray );
}
//==============================================================================
double GetDoubleFromRawBuffer(
const int type, void* buffer, vtkIdType buffer_idx)
{
assert("pre: cannot read from null buffer!" && (buffer != NULL) );
double dataItem = 0.0;
switch( type )
{
case gio::GENERIC_IO_INT32_TYPE:
{
int32_t *dataPtr = static_cast<int32_t*>(buffer);
dataItem = static_cast<double>(dataPtr[buffer_idx]);
}
break;
case gio::GENERIC_IO_INT64_TYPE:
{
int64_t *dataPtr = static_cast<int64_t*>(buffer);
dataItem = static_cast<double>(dataPtr[buffer_idx]);
}
break;
case gio::GENERIC_IO_UINT32_TYPE:
{
uint32_t *dataPtr = static_cast<uint32_t*>(buffer);
dataItem = static_cast<double>(dataPtr[buffer_idx]);
}
break;
case gio::GENERIC_IO_UINT64_TYPE:
{
uint64_t *dataPtr = static_cast<uint64_t*>(buffer);
dataItem = static_cast<double>(dataPtr[buffer_idx]);
}
break;
case gio::GENERIC_IO_DOUBLE_TYPE:
{
double *dataPtr = static_cast<double*>(buffer);
dataItem = dataPtr[buffer_idx];
}
break;
case gio::GENERIC_IO_FLOAT_TYPE:
{
float *dataPtr = static_cast<float*>(buffer);
dataItem = static_cast<double>(dataPtr[buffer_idx]);
}
break;
default:
assert("pre: Undefined GENERIC IO type: " && true);
} // END switch
return( dataItem );
}
//==============================================================================
vtkIdType GetIdFromRawBuffer(
const int type, void* buffer, vtkIdType buffer_idx)
{
assert("pre: cannot read from null buffer!" && (buffer != NULL) );
vtkIdType dataItem = 0;
switch( type )
{
case gio::GENERIC_IO_INT32_TYPE:
{
int32_t *dataPtr = static_cast<int32_t*>(buffer);
dataItem = static_cast<vtkIdType>(dataPtr[buffer_idx]);
}
break;
case gio::GENERIC_IO_INT64_TYPE:
{
int64_t *dataPtr = static_cast<int64_t*>(buffer);
dataItem = static_cast<vtkIdType>(dataPtr[buffer_idx]);
}
break;
case gio::GENERIC_IO_UINT32_TYPE:
{
uint32_t *dataPtr = static_cast<uint32_t*>(buffer);
dataItem = static_cast<vtkIdType>(dataPtr[buffer_idx]);
}
break;
case gio::GENERIC_IO_UINT64_TYPE:
{
uint64_t *dataPtr = static_cast<uint64_t*>(buffer);
dataItem = static_cast<vtkIdType>(dataPtr[buffer_idx]);
}
break;
case gio::GENERIC_IO_DOUBLE_TYPE:
{
double *dataPtr = static_cast<double*>(buffer);
dataItem = static_cast<vtkIdType>(dataPtr[buffer_idx]);
}
break;
case gio::GENERIC_IO_FLOAT_TYPE:
{
float *dataPtr = static_cast<float*>(buffer);
dataItem = static_cast<vtkIdType>(dataPtr[buffer_idx]);
}
break;
default:
assert("pre: Undefined GENERIC IO type: " && true);
} // END switch
return( dataItem );
}
//==============================================================================
gio::GenericIOReader* GetReader(
MPI_Comm comm, bool posix, int distribution, const std::string& fileName)
{
gio::GenericIOReader *reader = NULL;
if( posix )
{
reader = new gio::GenericIOPosixReader();
}
else
{
reader = new gio::GenericIOMPIReader();
}
assert( "pre: reader is NULL!" && (reader != NULL) );
reader->SetCommunicator(comm);
reader->SetBlockAssignmentStrategy(distribution);
reader->SetFileName(fileName);
return( reader );
}
//==============================================================================
gio::GenericIOWriter* GetWriter(MPI_Comm comm, const std::string& fileName)
{
gio::GenericIOWriter* writer = new gio::GenericIOMPIWriter(comm);
writer->SetFileName(fileName);
return writer;
}
}
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