/// <summary>Returns a sub-slice of this slice. This method cannot be used
/// to expand the range of the original slice.</summary>
public ListSlice <T> Slice(int start, int length)
{
CheckParam.IsNotNegative("length", length);
if (start > _length)
{
length = 0;
}
else if (length > _length - start)
{
length = _length - start;
}
return(new ListSlice <T>(_obj, _start + start, length));
}
public static void CopyTo <T>(this IReadOnlyCollection <T> c, T[] array, int arrayIndex)
{
int space = array.Length - arrayIndex;
if (c.Count > space)
{
CheckParam.ThrowBadArgument(nameof(array), "CopyTo: array is too small ({0} < {1})", space, c.Count);
}
CheckParam.IsNotNegative(nameof(arrayIndex), arrayIndex);
foreach (var item in c)
{
array[arrayIndex++] = item;
}
}
public IntRange Slice(int start, int count)
{
CheckParam.IsNotNegative("start", start);
CheckParam.IsNotNegative("count", count);
if (start > _count)
{
count = 0;
}
else if (count > _count - start)
{
count = _count - start;
}
return(new IntRange(_start + start, count));
}
/// <summary>Initializes a ListSourceSlice object which provides a view on part of another list.</summary>
/// <param name="list">A list to wrap (must not be null).</param>
/// <param name="start">An index into the original list. this[0] will refer to that index.
/// This cannot be negative, but it can be beyond the end of the list.</param>
/// <param name="length">The number of elements to allow access to. If
/// start+length exceeds the list size, length is reduced immediately.
/// Thus, if the original list expands after the slice is created, the
/// slice's Count never increases to match the original list.</param>
/// <exception cref="IndexOutOfRangeException">'start' or 'length' was negative.</exception>
public ListSlice(IList <T> list, int start, int length) : base(list)
{
CheckParam.IsNotNegative("length", length);
CheckParam.IsNotNegative("start", start);
int count = list.Count;
if (start > count)
{
length = 0;
}
else if (length > count - start)
{
length = count - start;
}
_start = start;
_length = length;
}
InternalDList <T> Slice(int start, int subcount)
{
CheckParam.IsNotNegative("start", start);
CheckParam.IsNotNegative("subcount", subcount);
if (start > _count)
{
start = _count;
}
if (subcount > _count - start)
{
subcount = _count - start;
}
return(new InternalDList <T> {
_start = IncMod(_start, start),
_count = subcount,
_array = _array
});
}
public new StringSlice Slice(int startIndex, int length)
{
CheckParam.IsNotNegative("startIndex", startIndex);
if (length <= 0)
{
return(new StringSlice("", 0, length));
}
StringBuilder sb = new StringBuilder(Math.Min(length, 1024));
for (int i = startIndex; i < startIndex + length; i++)
{
if ((uint)(i - _blkStart) >= (uint)_blkLen)
{
if (!Access(i))
{
break;
}
}
sb.Append(_blk[i - _blkStart]);
}
return(sb.ToString());
}
