/// <summary>
/// This methods allocates a mutable array and copies all the colletion elements to it
/// </summary>
/// <param name="collection">Collection to copy elements from</param>
/// <returns>Array</returns>
private static T[] AllocInternalArray(ICollection <T> collection)
{
T[] ret = ImmutableArrayInternal <T> .AllocInternalArray(collection.Count);
collection.CopyTo(ret, 0);
return(ret);
}
/// <summary>
/// Gets a portion of the array starting from the specified index for the specified length
/// </summary>
/// <param name="sourceIndex">Index to start from</param>
/// <param name="length">Length of the portion</param>
/// <returns>An immutable array that is a portion of this array</returns>
public ImmutableArray <T> SubArray(int sourceIndex, int length)
{
if ((this.Count == sourceIndex) && (length == 0))
{
return(Empty);
}
List <ImmutableArrayInternal <T> > ret = new List <ImmutableArrayInternal <T> >();
int i = this.GetArrayIndexAt(ref sourceIndex);
if ((sourceIndex + length) > this.Count)
{
throw new ArgumentOutOfRangeException("The sourceIndex and length specified overcome the array length");
}
ImmutableArrayInternal <T> array = _arrays[i];
array = new ImmutableArrayInternal <T>(sourceIndex, array, array.Length < length ? array.Length : length);
length -= array.Length;
ret.Add(array);
for (i += 1; (length > 0) && (i < _arrays.Count); i++)
{
array = _arrays[i];
if (array.Length > length) //if only partial create a subarray
{
array = array.SubArrayInternal(0, length);
}
ret.Add(array);
length -= array.Length;
}
return(new ImmutableArray <T>(ret.ToArray()));
}
private void Add(ImmutableArrayInternal <T> array)
{
if (array.Length <= 0)
{
return;
}
_arrays.Add(array);
_offsets.Add(this.Count + array.Length);
_length += array.Length;
}
/// <summary>
/// This method allocates a copy of the specified array
/// </summary>
/// <param name="sourceIndex">Index to start the copy</param>
/// <param name="data">Array of data to be copied</param>
/// <param name="length">Length od data to topy</param>
/// <returns>A partial/complete clone of the specified array</returns>
private static T[] AllocInternalArray(int sourceIndex, T[] data, int length)
{
if (length == 0)
{
return(EmptyArray);
}
T[] ret = ImmutableArrayInternal <T> .AllocInternalArray(length);
Array.Copy(data, sourceIndex, ret, 0, length);
return(ret);
}
private void Add(ImmutableArrayInternal <T> array)
{
if (array.Length <= 0)
{
return;
}
array.IncreaseReferences();
_arrays.Add(array);
_offsets.Add(_length + array.Length);
_length += array.Length;
}
public ImmutableArrayInternal(int sourceIndex, ImmutableArrayInternal <T> data, int length)
{
if ((sourceIndex < 0) || (sourceIndex >= data.Length))
{
throw new IndexOutOfRangeException("Index must be between 0 and upper array bound");
}
if (data == null)
{
throw new ArgumentNullException("data", "Array cannot be null");
}
if ((sourceIndex + length) > data.Length)
{
throw new ArgumentOutOfRangeException("The sourceIndex and length specified overcome the source ByteArray length");
}
this.Offset = data.Offset + sourceIndex;
this.Data = data.Data;
this.Length = length;
}
public ImmutableArrayInternal(int sourceIndex, T[] data, int length)
{
if (sourceIndex < 0)
{
throw new IndexOutOfRangeException("Index cannot be less than zero");
}
if (data == null)
{
throw new ArgumentNullException("data", "Array cannot be null");
}
if ((sourceIndex + length) > data.Length)
{
throw new ArgumentOutOfRangeException("The sourceIndex and length specified overcome the source ByteArray length");
}
_offset = 0;
_data = ImmutableArrayInternal <T> .AllocInternalArray(sourceIndex, data, length);
_length = length;
}
protected bool EqualsTo(ImmutableArrayInternal <T> array)
{
if (_length != array.Length)
{
return(false);
}
//fast compare
if (this.GetHashCode() != array.GetHashCode())
{
return(false);
}
//slow compare
for (int i = 0; i < _length; i++)
{
if (!this[i].Equals(array[i]))
{
return(false);
}
}
return(true);
}
public ImmutableArrayInternal(ImmutableArrayInternal <T> data, int length)
: this(0, data, length)
{
}
public ImmutableArrayInternal(ImmutableArrayInternal <T> data)
: this(data, data.Length)
{
}