static void CheckArgsCopy(ref UnsafeBitArray dstBitArray, int dstPos, ref UnsafeBitArray srcBitArray, int srcPos, int numBits)
{
if (dstPos + numBits > srcBitArray.Length)
{
throw new ArgumentException($"BitArray invalid arguments: Out of bounds - source position {srcPos}, numBits {numBits}, source bit array Length {srcBitArray.Length}.");
}
if (dstPos + numBits > dstBitArray.Length)
{
throw new ArgumentException($"BitArray invalid arguments: Out of bounds - destination position {dstPos}, numBits {numBits}, destination bit array Length {dstBitArray.Length}.");
}
}
public UnsafeBitArrayDebugView(UnsafeBitArray data)
{
Data = data;
}
/// <summary>
/// Copy block of bits from source to destination.
/// </summary>
/// <param name="dstPos">Destination position in bit array.</param>
/// <param name="srcBitArray">Source bit array from which bits will be copied.</param>
/// <param name="srcPos">Source position in bit array.</param>
/// <param name="numBits">Number of bits to copy.</param>
public void Copy(int dstPos, ref UnsafeBitArray srcBitArray, int srcPos, int numBits)
{
if (numBits == 0)
{
return;
}
CheckArgsCopy(ref this, dstPos, ref srcBitArray, srcPos, numBits);
if (numBits <= 64) // 1x CopyUlong
{
CopyUlong(dstPos, ref srcBitArray, srcPos, numBits);
}
else if (numBits <= 128) // 2x CopyUlong
{
CopyUlong(dstPos, ref srcBitArray, srcPos, 64);
numBits -= 64;
if (numBits > 0)
{
CopyUlong(dstPos + 64, ref srcBitArray, srcPos + 64, numBits);
}
}
else if ((dstPos & 7) == (srcPos & 7)) // aligned copy
{
var dstPosInBytes = CollectionHelper.Align(dstPos, 8) >> 3;
var srcPosInBytes = CollectionHelper.Align(srcPos, 8) >> 3;
var numPreBits = dstPosInBytes * 8 - dstPos;
if (numPreBits > 0)
{
CopyUlong(dstPos, ref srcBitArray, srcPos, numPreBits);
}
var numBitsLeft = numBits - numPreBits;
var numBytes = numBitsLeft / 8;
if (numBytes > 0)
{
unsafe
{
UnsafeUtility.MemMove((byte *)Ptr + dstPosInBytes, (byte *)srcBitArray.Ptr + srcPosInBytes, numBytes);
}
}
var numPostBits = numBitsLeft & 7;
if (numPostBits > 0)
{
CopyUlong((dstPosInBytes + numBytes) * 8, ref srcBitArray, (srcPosInBytes + numBytes) * 8, numPostBits);
}
}
else // unaligned copy
{
var dstPosAligned = CollectionHelper.Align(dstPos, 64);
var numPreBits = dstPosAligned - dstPos;
if (numPreBits > 0)
{
CopyUlong(dstPos, ref srcBitArray, srcPos, numPreBits);
numBits -= numPreBits;
dstPos += numPreBits;
srcPos += numPreBits;
}
for (; numBits >= 64; numBits -= 64, dstPos += 64, srcPos += 64)
{
Ptr[dstPos >> 6] = srcBitArray.GetBits(srcPos, 64);
}
if (numBits > 0)
{
CopyUlong(dstPos, ref srcBitArray, srcPos, numBits);
}
}
}
internal void CopyUlong(int dstPos, ref UnsafeBitArray srcBitArray, int srcPos, int numBits) => SetBits(dstPos, srcBitArray.GetBits(srcPos, numBits), numBits);