void CopySubMatrixTo(DiagonalMatrixStorage <T> target,
int sourceRowIndex, int targetRowIndex, int rowCount,
int sourceColumnIndex, int targetColumnIndex, int columnCount)
{
if (target == null)
{
throw new ArgumentNullException("target");
}
if (ReferenceEquals(this, target))
{
throw new NotSupportedException();
}
if (sourceRowIndex - sourceColumnIndex != targetRowIndex - targetColumnIndex)
{
if (Data.Any(x => !_zero.Equals(x)))
{
throw new NotSupportedException();
}
target.Clear(targetRowIndex, rowCount, targetColumnIndex, columnCount);
return;
}
ValidateSubMatrixRange(target,
sourceRowIndex, targetRowIndex, rowCount,
sourceColumnIndex, targetColumnIndex, columnCount);
var beginInclusive = Math.Max(sourceRowIndex, sourceColumnIndex);
var endExclusive = Math.Min(sourceRowIndex + rowCount, sourceColumnIndex + columnCount);
if (endExclusive > beginInclusive)
{
var beginTarget = Math.Max(targetRowIndex, targetColumnIndex);
Array.Copy(Data, beginInclusive, target.Data, beginTarget, endExclusive - beginInclusive);
}
}
void CopySubMatrixToUnchecked(DiagonalMatrixStorage <T> target,
int sourceRowIndex, int targetRowIndex, int rowCount,
int sourceColumnIndex, int targetColumnIndex, int columnCount)
{
if (sourceRowIndex - sourceColumnIndex != targetRowIndex - targetColumnIndex)
{
if (Data.Any(x => !Zero.Equals(x)))
{
throw new NotSupportedException();
}
target.Clear(targetRowIndex, rowCount, targetColumnIndex, columnCount);
return;
}
var beginInclusive = Math.Max(sourceRowIndex, sourceColumnIndex);
var endExclusive = Math.Min(sourceRowIndex + rowCount, sourceColumnIndex + columnCount);
if (endExclusive > beginInclusive)
{
var beginTarget = Math.Max(targetRowIndex, targetColumnIndex);
Array.Copy(Data, beginInclusive, target.Data, beginTarget, endExclusive - beginInclusive);
}
}