/// <summary>
/// Creates an instance of <see cref="ReadOnlySequence{T}"/> from the <see cref="T:T[]"/>, start and index.
/// </summary>
public ReadOnlySequence(T[] array, int start, int length)
{
if (array == null ||
(uint)start > (uint)array.Length ||
(uint)length > (uint)(array.Length - start))
{
ThrowHelper.ThrowArgumentValidationException(array, start);
}
_sequenceStart = new SequencePosition(array, ReadOnlySequence.ArrayToSequenceStart(start));
_sequenceEnd = new SequencePosition(array, ReadOnlySequence.ArrayToSequenceEnd(start + length));
}
/// <summary>
/// Creates an instance of <see cref="ReadOnlySequence{T}"/> from linked memory list represented by start and end segments
/// and corresponding indexes in them.
/// </summary>
public ReadOnlySequence(IMemoryList <T> startSegment, int startIndex, IMemoryList <T> endSegment, int endIndex)
{
if (startSegment == null ||
endSegment == null ||
(uint)startSegment.Memory.Length < (uint)startIndex ||
(uint)endSegment.Memory.Length < (uint)endIndex ||
(startSegment == endSegment && endIndex < startIndex))
{
ThrowHelper.ThrowArgumentValidationException(startSegment, startIndex, endSegment);
}
_sequenceStart = new SequencePosition(startSegment, ReadOnlySequence.MemoryListToSequenceStart(startIndex));
_sequenceEnd = new SequencePosition(endSegment, ReadOnlySequence.MemoryListToSequenceEnd(endIndex));
}
