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vtkBitArray.cxx
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vtkBitArray.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkBitArray.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkBitArray.h"
#include "vtkBitArrayIterator.h"
#include "vtkIdList.h"
#include "vtkObjectFactory.h"
namespace
{
constexpr unsigned char InitializationMaskForUnusedBitsOfLastByte[8] = { 0x80, 0xc0, 0xe0, 0xf0,
0xf8, 0xfc, 0xfe, 0xff };
} // anonymous namespace
//------------------------------------------------------------------------------
class vtkBitArrayLookup
{
public:
vtkBitArrayLookup()
: Rebuild(true)
{
this->ZeroArray = nullptr;
this->OneArray = nullptr;
}
~vtkBitArrayLookup()
{
if (this->ZeroArray)
{
this->ZeroArray->Delete();
this->ZeroArray = nullptr;
}
if (this->OneArray)
{
this->OneArray->Delete();
this->OneArray = nullptr;
}
}
vtkIdList* ZeroArray;
vtkIdList* OneArray;
bool Rebuild;
};
vtkStandardNewMacro(vtkBitArray);
//------------------------------------------------------------------------------
// Instantiate object.
vtkBitArray::vtkBitArray()
{
this->Array = nullptr;
this->TupleSize = 3;
this->Tuple = new double[this->TupleSize]; // used for conversion
this->DeleteFunction = ::operator delete[];
this->Lookup = nullptr;
}
//------------------------------------------------------------------------------
vtkBitArray::~vtkBitArray()
{
if (this->DeleteFunction)
{
this->DeleteFunction(this->Array);
}
delete[] this->Tuple;
delete this->Lookup;
}
void vtkBitArray::InitializeUnusedBitsInLastByte()
{
if (this->MaxId > -1)
{
this->Array[this->MaxId / 8] &= InitializationMaskForUnusedBitsOfLastByte[this->MaxId % 8];
}
}
//------------------------------------------------------------------------------
unsigned char* vtkBitArray::WritePointer(vtkIdType id, vtkIdType number)
{
vtkIdType newSize = id + number;
if (newSize > this->Size)
{
this->ResizeAndExtend(newSize);
}
if ((--newSize) > this->MaxId)
{
this->MaxId = newSize;
this->InitializeUnusedBitsInLastByte();
}
this->DataChanged();
return this->Array + id / 8;
}
//------------------------------------------------------------------------------
// This method lets the user specify data to be held by the array. The
// array argument is a pointer to the data. size is the size of
// the array supplied by the user. Set save to 1 to keep the class
// from deleting the array when it cleans up or reallocates memory.
// The class uses the actual array provided; it does not copy the data
// from the supplied array.
void vtkBitArray::SetArray(unsigned char* array, vtkIdType size, int save, int deleteMethod)
{
if ((this->Array) && (this->DeleteFunction))
{
vtkDebugMacro(<< "Deleting the array...");
this->DeleteFunction(this->Array);
}
else
{
vtkDebugMacro(<< "Warning, array not deleted, but will point to new array.");
}
vtkDebugMacro(<< "Setting array to: " << array);
this->Array = array;
this->Size = size;
this->MaxId = size - 1;
this->InitializeUnusedBitsInLastByte();
if (save != 0)
{
this->DeleteFunction = nullptr;
}
else if (deleteMethod == VTK_DATA_ARRAY_DELETE || deleteMethod == VTK_DATA_ARRAY_USER_DEFINED)
{
this->DeleteFunction = ::operator delete[];
}
else if (deleteMethod == VTK_DATA_ARRAY_ALIGNED_FREE)
{
#ifdef _WIN32
this->DeleteFunction = _aligned_free;
#else
this->DeleteFunction = free;
#endif
}
else if (deleteMethod == VTK_DATA_ARRAY_FREE)
{
this->DeleteFunction = free;
}
this->DataChanged();
}
//------------------------------------------------------------------------------
void vtkBitArray::SetArrayFreeFunction(void (*callback)(void*))
{
this->DeleteFunction = callback;
}
//------------------------------------------------------------------------------
// Get the data at a particular index.
int vtkBitArray::GetValue(vtkIdType id) const
{
return (this->Array[id / 8] & (0x80 >> (id % 8))) != 0;
}
//------------------------------------------------------------------------------
// Allocate memory for this array. Delete old storage only if necessary.
vtkTypeBool vtkBitArray::Allocate(vtkIdType sz, vtkIdType vtkNotUsed(ext))
{
if (sz > this->Size)
{
if (this->DeleteFunction)
{
this->DeleteFunction(this->Array);
}
this->Size = (sz > 0 ? sz : 1);
if ((this->Array = new unsigned char[(this->Size + 7) / 8]) == nullptr)
{
return 0;
}
this->DeleteFunction = ::operator delete[];
}
this->MaxId = -1;
this->DataChanged();
return 1;
}
//------------------------------------------------------------------------------
// Release storage and reset array to initial state.
void vtkBitArray::Initialize()
{
if (this->DeleteFunction)
{
this->DeleteFunction(this->Array);
}
this->Array = nullptr;
this->Size = 0;
this->MaxId = -1;
this->DeleteFunction = ::operator delete[];
this->DataChanged();
}
//------------------------------------------------------------------------------
// Deep copy of another bit array.
void vtkBitArray::DeepCopy(vtkDataArray* ia)
{
// Do nothing on a nullptr input.
if (ia == nullptr)
{
return;
}
this->DataChanged();
if (ia->GetDataType() != VTK_BIT)
{
vtkIdType numTuples = ia->GetNumberOfTuples();
this->NumberOfComponents = ia->GetNumberOfComponents();
this->SetNumberOfTuples(numTuples);
for (vtkIdType i = 0; i < numTuples; i++)
{
this->SetTuple(i, ia->GetTuple(i));
}
return;
}
if (this != ia)
{
if (this->DeleteFunction)
{
this->DeleteFunction(this->Array);
}
this->NumberOfComponents = ia->GetNumberOfComponents();
this->MaxId = ia->GetMaxId();
this->Size = ia->GetSize();
this->DeleteFunction = ::operator delete[];
this->Array = new unsigned char[(this->Size + 7) / 8];
memcpy(this->Array, static_cast<unsigned char*>(ia->GetVoidPointer(0)),
static_cast<size_t>((this->Size + 7) / 8) * sizeof(unsigned char));
}
}
//------------------------------------------------------------------------------
void vtkBitArray::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
if (this->Array)
{
os << indent << "Array: " << this->Array << "\n";
}
else
{
os << indent << "Array: (null)\n";
}
}
//------------------------------------------------------------------------------
// Private function does "reallocate". Sz is the number of "bits", and we
// can allocate only 8-bit bytes.
unsigned char* vtkBitArray::ResizeAndExtend(vtkIdType sz)
{
unsigned char* newArray;
vtkIdType newSize;
if (sz > this->Size)
{
newSize = this->Size + sz;
}
else if (sz == this->Size)
{
return this->Array;
}
else
{
newSize = sz;
}
if (newSize <= 0)
{
this->Initialize();
return nullptr;
}
if ((newArray = new unsigned char[(newSize + 7) / 8]) == nullptr)
{
vtkErrorMacro(<< "Cannot allocate memory\n");
return nullptr;
}
if (this->Array)
{
vtkIdType usedSize = (sz < this->Size) ? sz : this->Size;
memcpy(newArray, this->Array, static_cast<size_t>((usedSize + 7) / 8) * sizeof(unsigned char));
if (this->DeleteFunction)
{
this->DeleteFunction(this->Array);
}
}
this->Array = newArray;
if (newSize < this->Size)
{
this->MaxId = newSize - 1;
this->InitializeUnusedBitsInLastByte();
}
this->Size = newSize;
this->DeleteFunction = ::operator delete[];
this->DataChanged();
return this->Array;
}
//------------------------------------------------------------------------------
vtkTypeBool vtkBitArray::Resize(vtkIdType sz)
{
unsigned char* newArray;
vtkIdType newSize = sz * this->NumberOfComponents;
if (newSize == this->Size)
{
return 1;
}
if (newSize <= 0)
{
this->Initialize();
return 1;
}
if ((newArray = new unsigned char[(newSize + 7) / 8]) == nullptr)
{
vtkErrorMacro(<< "Cannot allocate memory\n");
return 0;
}
if (this->Array)
{
vtkIdType usedSize = (newSize < this->Size) ? newSize : this->Size;
memcpy(newArray, this->Array, static_cast<size_t>((usedSize + 7) / 8) * sizeof(unsigned char));
if (this->DeleteFunction)
{
this->DeleteFunction(this->Array);
}
}
this->Array = newArray;
if (newSize < this->Size)
{
this->MaxId = newSize - 1;
this->InitializeUnusedBitsInLastByte();
}
this->Size = newSize;
this->DeleteFunction = ::operator delete[];
this->DataChanged();
return 1;
}
//------------------------------------------------------------------------------
// Set the number of n-tuples in the array.
void vtkBitArray::SetNumberOfTuples(vtkIdType number)
{
this->SetNumberOfValues(number * this->NumberOfComponents);
}
//------------------------------------------------------------------------------
bool vtkBitArray::SetNumberOfValues(vtkIdType number)
{
if (!this->Superclass::SetNumberOfValues(number))
{
return false;
}
this->InitializeUnusedBitsInLastByte();
return true;
}
//------------------------------------------------------------------------------
// Description:
// Set the tuple at the ith location using the jth tuple in the source array.
// This method assumes that the two arrays have the same type
// and structure. Note that range checking and memory allocation is not
// performed; use in conjunction with SetNumberOfTuples() to allocate space.
void vtkBitArray::SetTuple(vtkIdType i, vtkIdType j, vtkAbstractArray* source)
{
vtkBitArray* ba = vtkArrayDownCast<vtkBitArray>(source);
if (!ba)
{
vtkWarningMacro("Input and output arrays types do not match.");
return;
}
vtkIdType loci = i * this->NumberOfComponents;
vtkIdType locj = j * ba->GetNumberOfComponents();
for (vtkIdType cur = 0; cur < this->NumberOfComponents; cur++)
{
this->SetValue(loci + cur, ba->GetValue(locj + cur));
}
this->DataChanged();
}
//------------------------------------------------------------------------------
// Description:
// Insert the jth tuple in the source array, at ith location in this array.
// Note that memory allocation is performed as necessary to hold the data.
void vtkBitArray::InsertTuple(vtkIdType i, vtkIdType j, vtkAbstractArray* source)
{
vtkBitArray* ba = vtkArrayDownCast<vtkBitArray>(source);
if (!ba)
{
vtkWarningMacro("Input and output arrays types do not match.");
return;
}
vtkIdType loci = i * this->NumberOfComponents;
vtkIdType locj = j * ba->GetNumberOfComponents();
vtkIdType previousMaxId = this->MaxId;
for (vtkIdType cur = 0; cur < this->NumberOfComponents; cur++)
{
this->InsertValue(loci + cur, ba->GetValue(locj + cur));
}
if (previousMaxId / 8 != this->MaxId / 8)
{
this->InitializeUnusedBitsInLastByte();
}
this->DataChanged();
}
//------------------------------------------------------------------------------
void vtkBitArray::InsertTuples(vtkIdList* dstIds, vtkIdList* srcIds, vtkAbstractArray* source)
{
vtkBitArray* ba = vtkArrayDownCast<vtkBitArray>(source);
if (!ba)
{
vtkWarningMacro("Input and output arrays types do not match.");
return;
}
if (ba->NumberOfComponents != this->NumberOfComponents)
{
vtkWarningMacro("Number of components do not match.");
return;
}
vtkIdType numIds = dstIds->GetNumberOfIds();
if (srcIds->GetNumberOfIds() != numIds)
{
vtkWarningMacro("Input and output id array sizes do not match.");
return;
}
vtkIdType previousMaxId = this->MaxId;
for (vtkIdType idIndex = 0; idIndex < numIds; ++idIndex)
{
vtkIdType numComp = this->NumberOfComponents;
vtkIdType srcLoc = srcIds->GetId(idIndex) * this->NumberOfComponents;
vtkIdType dstLoc = dstIds->GetId(idIndex) * this->NumberOfComponents;
while (numComp-- > 0)
{
this->InsertValue(dstLoc++, ba->GetValue(srcLoc++));
}
}
if (previousMaxId / 8 != this->MaxId / 8)
{
this->InitializeUnusedBitsInLastByte();
}
this->DataChanged();
}
//------------------------------------------------------------------------------
void vtkBitArray::InsertTuples(
vtkIdType dstStart, vtkIdType n, vtkIdType srcStart, vtkAbstractArray* source)
{
vtkBitArray* sa = vtkArrayDownCast<vtkBitArray>(source);
if (!sa)
{
vtkWarningMacro("Input and outputs array data types do not match.");
return;
}
if (this->NumberOfComponents != source->GetNumberOfComponents())
{
vtkWarningMacro("Input and output component sizes do not match.");
return;
}
vtkIdType srcEnd = srcStart + n;
if (srcEnd > source->GetNumberOfTuples())
{
vtkWarningMacro("Source range exceeds array size (srcStart="
<< srcStart << ", n=" << n << ", numTuples=" << source->GetNumberOfTuples() << ").");
return;
}
vtkIdType previousMaxId = this->MaxId;
for (vtkIdType i = 0; i < n; ++i)
{
vtkIdType numComp = this->NumberOfComponents;
vtkIdType srcLoc = (srcStart + i) * this->NumberOfComponents;
vtkIdType dstLoc = (dstStart + i) * this->NumberOfComponents;
while (numComp-- > 0)
{
this->InsertValue(dstLoc++, sa->GetValue(srcLoc++));
}
}
if (previousMaxId / 8 != this->MaxId / 8)
{
this->InitializeUnusedBitsInLastByte();
}
this->DataChanged();
}
//------------------------------------------------------------------------------
// Description:
// Insert the jth tuple in the source array, at the end in this array.
// Note that memory allocation is performed as necessary to hold the data.
// Returns the location at which the data was inserted.
vtkIdType vtkBitArray::InsertNextTuple(vtkIdType j, vtkAbstractArray* source)
{
vtkBitArray* ba = vtkArrayDownCast<vtkBitArray>(source);
if (!ba)
{
vtkWarningMacro("Input and output arrays types do not match.");
return -1;
}
vtkIdType locj = j * ba->GetNumberOfComponents();
for (vtkIdType cur = 0; cur < this->NumberOfComponents; cur++)
{
this->InsertNextValue(ba->GetValue(locj + cur));
}
this->DataChanged();
return (this->GetNumberOfTuples() - 1);
}
//------------------------------------------------------------------------------
// Get a pointer to a tuple at the ith location. This is a dangerous method
// (it is not thread safe since a pointer is returned).
double* vtkBitArray::GetTuple(vtkIdType i)
{
if (this->TupleSize < this->NumberOfComponents)
{
this->TupleSize = this->NumberOfComponents;
delete[] this->Tuple;
this->Tuple = new double[this->TupleSize];
}
vtkIdType loc = this->NumberOfComponents * i;
for (int j = 0; j < this->NumberOfComponents; j++)
{
this->Tuple[j] = static_cast<double>(this->GetValue(loc + j));
}
return this->Tuple;
}
//------------------------------------------------------------------------------
// Copy the tuple value into a user-provided array.
void vtkBitArray::GetTuple(vtkIdType i, double* tuple)
{
vtkIdType loc = this->NumberOfComponents * i;
for (int j = 0; j < this->NumberOfComponents; j++)
{
tuple[j] = static_cast<double>(this->GetValue(loc + j));
}
}
//------------------------------------------------------------------------------
// Set the tuple value at the ith location in the array.
void vtkBitArray::SetTuple(vtkIdType i, const float* tuple)
{
vtkIdType loc = i * this->NumberOfComponents;
for (int j = 0; j < this->NumberOfComponents; j++)
{
this->SetValue(loc + j, static_cast<int>(tuple[j]));
}
this->DataChanged();
}
//------------------------------------------------------------------------------
void vtkBitArray::SetTuple(vtkIdType i, const double* tuple)
{
vtkIdType loc = i * this->NumberOfComponents;
for (int j = 0; j < this->NumberOfComponents; j++)
{
this->SetValue(loc + j, static_cast<int>(tuple[j]));
}
this->DataChanged();
}
//------------------------------------------------------------------------------
// Insert (memory allocation performed) the tuple into the ith location
// in the array.
void vtkBitArray::InsertTuple(vtkIdType i, const float* tuple)
{
vtkIdType loc = this->NumberOfComponents * i;
for (int j = 0; j < this->NumberOfComponents; j++)
{
this->InsertValue(loc + j, static_cast<int>(tuple[j]));
}
this->DataChanged();
}
//------------------------------------------------------------------------------
void vtkBitArray::InsertTuple(vtkIdType i, const double* tuple)
{
vtkIdType loc = this->NumberOfComponents * i;
for (int j = 0; j < this->NumberOfComponents; j++)
{
this->InsertValue(loc + j, static_cast<int>(tuple[j]));
}
this->DataChanged();
}
//------------------------------------------------------------------------------
// Insert (memory allocation performed) the tuple onto the end of the array.
vtkIdType vtkBitArray::InsertNextTuple(const float* tuple)
{
for (int i = 0; i < this->NumberOfComponents; i++)
{
this->InsertNextValue(static_cast<int>(tuple[i]));
}
this->DataChanged();
return this->MaxId / this->NumberOfComponents;
}
//------------------------------------------------------------------------------
vtkIdType vtkBitArray::InsertNextTuple(const double* tuple)
{
for (int i = 0; i < this->NumberOfComponents; i++)
{
this->InsertNextValue(static_cast<int>(tuple[i]));
}
this->DataChanged();
return this->MaxId / this->NumberOfComponents;
}
//------------------------------------------------------------------------------
void vtkBitArray::InsertComponent(vtkIdType i, int j, double c)
{
this->InsertValue(i * this->NumberOfComponents + j, static_cast<int>(c));
this->DataChanged();
}
//------------------------------------------------------------------------------
// Set the data component at the ith tuple and jth component location.
// Note that i<NumberOfTuples and j<NumberOfComponents. Make sure enough
// memory has been allocated (use SetNumberOfTuples() and
// SetNumberOfComponents()).
void vtkBitArray::SetComponent(vtkIdType i, int j, double c)
{
this->SetValue(i * this->NumberOfComponents + j, static_cast<int>(c));
this->DataChanged();
}
//------------------------------------------------------------------------------
void vtkBitArray::RemoveTuple(vtkIdType id)
{
if (id < 0 || id >= this->GetNumberOfTuples())
{
// Nothing to be done
return;
}
if (id == this->GetNumberOfTuples() - 1)
{
// To remove last item, just decrease the size by one
this->RemoveLastTuple();
return;
}
this->DataChanged();
vtkErrorMacro("Not yet implemented...");
}
//------------------------------------------------------------------------------
void vtkBitArray::RemoveFirstTuple()
{
vtkErrorMacro("Not yet implemented...");
this->RemoveTuple(0);
this->DataChanged();
}
//------------------------------------------------------------------------------
void vtkBitArray::RemoveLastTuple()
{
this->Resize(this->GetNumberOfTuples() - 1);
this->DataChanged();
}
//------------------------------------------------------------------------------
vtkArrayIterator* vtkBitArray::NewIterator()
{
vtkArrayIterator* iter = vtkBitArrayIterator::New();
iter->Initialize(this);
return iter;
}
//------------------------------------------------------------------------------
void vtkBitArray::UpdateLookup()
{
if (!this->Lookup)
{
this->Lookup = new vtkBitArrayLookup();
this->Lookup->ZeroArray = vtkIdList::New();
this->Lookup->OneArray = vtkIdList::New();
}
if (this->Lookup->Rebuild)
{
int numComps = this->GetNumberOfComponents();
vtkIdType numTuples = this->GetNumberOfTuples();
this->Lookup->ZeroArray->Allocate(numComps * numTuples);
this->Lookup->OneArray->Allocate(numComps * numTuples);
for (vtkIdType i = 0; i < numComps * numTuples; i++)
{
if (this->GetValue(i))
{
this->Lookup->OneArray->InsertNextId(i);
}
else
{
this->Lookup->ZeroArray->InsertNextId(i);
}
}
this->Lookup->Rebuild = false;
}
}
//------------------------------------------------------------------------------
vtkIdType vtkBitArray::LookupValue(vtkVariant var)
{
return this->LookupValue(var.ToInt());
}
//------------------------------------------------------------------------------
void vtkBitArray::LookupValue(vtkVariant var, vtkIdList* ids)
{
this->LookupValue(var.ToInt(), ids);
}
//------------------------------------------------------------------------------
vtkIdType vtkBitArray::LookupValue(int value)
{
this->UpdateLookup();
if (value == 1 && this->Lookup->OneArray->GetNumberOfIds() > 0)
{
return this->Lookup->OneArray->GetId(0);
}
else if (value == 0 && this->Lookup->ZeroArray->GetNumberOfIds() > 0)
{
return this->Lookup->ZeroArray->GetId(0);
}
return -1;
}
//------------------------------------------------------------------------------
void vtkBitArray::LookupValue(int value, vtkIdList* ids)
{
this->UpdateLookup();
if (value == 1)
{
ids->DeepCopy(this->Lookup->OneArray);
}
else if (value == 0)
{
ids->DeepCopy(this->Lookup->ZeroArray);
}
else
{
ids->Reset();
}
}
//------------------------------------------------------------------------------
void vtkBitArray::DataChanged()
{
if (this->Lookup)
{
this->Lookup->Rebuild = true;
}
}
//------------------------------------------------------------------------------
void vtkBitArray::ClearLookup()
{
delete this->Lookup;
this->Lookup = nullptr;
}