public PrimitiveColumnContainer(long length = 0)
{
while (length > 0)
{
if (Buffers.Count == 0)
{
Buffers.Add(new DataFrameBuffer <T>());
NullBitMapBuffers.Add(new DataFrameBuffer <byte>());
}
DataFrameBuffer <T> lastBuffer = (DataFrameBuffer <T>)Buffers[Buffers.Count - 1];
if (lastBuffer.Length == ReadOnlyDataFrameBuffer <T> .MaxCapacity)
{
lastBuffer = new DataFrameBuffer <T>();
Buffers.Add(lastBuffer);
NullBitMapBuffers.Add(new DataFrameBuffer <byte>());
}
int allocatable = (int)Math.Min(length, ReadOnlyDataFrameBuffer <T> .MaxCapacity);
lastBuffer.EnsureCapacity(allocatable);
DataFrameBuffer <byte> lastNullBitMapBuffer = (DataFrameBuffer <byte>)(NullBitMapBuffers[NullBitMapBuffers.Count - 1]);
int nullBufferAllocatable = (allocatable + 7) / 8;
lastNullBitMapBuffer.EnsureCapacity(nullBufferAllocatable);
lastBuffer.Length = allocatable;
lastNullBitMapBuffer.Length = nullBufferAllocatable;
length -= allocatable;
Length += lastBuffer.Length;
NullCount += lastBuffer.Length;
}
}
public PrimitiveColumnContainer(ReadOnlyMemory <byte> buffer, ReadOnlyMemory <byte> nullBitMap, int length, int nullCount)
{
ReadOnlyDataFrameBuffer <T> dataBuffer;
if (buffer.IsEmpty)
{
DataFrameBuffer <T> mutableBuffer = new DataFrameBuffer <T>();
mutableBuffer.EnsureCapacity(length);
mutableBuffer.Length = length;
mutableBuffer.RawSpan.Fill(default(T));
dataBuffer = mutableBuffer;
}
else
{
dataBuffer = new ReadOnlyDataFrameBuffer <T>(buffer, length);
}
Buffers.Add(dataBuffer);
int bitMapBufferLength = (length + 7) / 8;
ReadOnlyDataFrameBuffer <byte> nullDataFrameBuffer;
if (nullBitMap.IsEmpty)
{
if (nullCount != 0)
{
throw new ArgumentNullException(Strings.InconsistentNullBitMapAndNullCount, nameof(nullBitMap));
}
if (!buffer.IsEmpty)
{
// Create a new bitMap with all the bits up to length set
var bitMap = new byte[bitMapBufferLength];
bitMap.AsSpan().Fill(255);
int lastByte = 1 << (length - (bitMapBufferLength - 1) * 8);
bitMap[bitMapBufferLength - 1] = (byte)(lastByte - 1);
nullDataFrameBuffer = new DataFrameBuffer <byte>(bitMap, bitMapBufferLength);
}
else
{
nullDataFrameBuffer = new DataFrameBuffer <byte>();
}
}
else
{
if (nullBitMap.Length < bitMapBufferLength)
{
throw new ArgumentException(Strings.InconsistentNullBitMapAndLength, nameof(nullBitMap));
}
nullDataFrameBuffer = new ReadOnlyDataFrameBuffer <byte>(nullBitMap, bitMapBufferLength);
}
NullBitMapBuffers.Add(nullDataFrameBuffer);
Length = length;
NullCount = nullCount;
}