public static ArraySliceObj Create(NeSeqObj seq, Obj obj)
{
int len = seq.GetSize();
int size = MinBufferSize(len + 1);
Obj[] buffer = new Obj[size];
seq.Copy(0, len, buffer, 0);
buffer[len] = obj;
PaddedArray paddedArray = new PaddedArray(buffer, len + 1);
return(paddedArray.Slice(0, len + 1));
}
public static ArraySliceObj Create(NeSeqObj left, NeSeqObj right)
{
int leftLen = left.GetSize();
int rightLen = right.GetSize();
int len = leftLen + rightLen;
int size = MinBufferSize(len);
Obj[] buffer = new Obj[size];
left.Copy(0, leftLen, buffer, 0);
right.Copy(0, rightLen, buffer, leftLen);
PaddedArray paddedArray = new PaddedArray(buffer, len);
return(paddedArray.Slice(0, len));
}
public /*synchronized*/ ArraySliceObj Concat(int idx, NeSeqObj seq)
{
int seqLen = seq.GetSize();
int newLen = idx + seqLen;
if (newLen > buffer.Length)
{
// We run out of space, expanding the array buffer
int size = MinBufferSize(newLen);
Obj[] newBuffer = new Obj[size];
for (int i = 0; i < idx; i++)
{
newBuffer[i] = buffer[i];
}
seq.Copy(0, seqLen, newBuffer, idx);
PaddedArray newArray = new PaddedArray(newBuffer, newLen);
return(newArray.Slice(0, newLen));
//## THINK ABOUT THIS. WOULD IT WORK?
// buffer = newBuffer;
// used = newLen;
// return new ArraySliceObj(this, buffer, 0, used);
}
else if (idx == used)
{
// There's space for the new elements
seq.Copy(0, seqLen, buffer, idx);
used = newLen;
return(new ArraySliceObj(this, buffer, 0, used));
}
else
{
// The next slot was already taken. This is supposed to happen only rarely
Debug.Assert(idx < used & idx < buffer.Length);
Obj[] newBuffer = new Obj[buffer.Length];
for (int i = 0; i < idx; i++)
{
newBuffer[i] = buffer[i];
}
seq.Copy(0, seqLen, newBuffer, idx);
PaddedArray newArray = new PaddedArray(newBuffer, newLen);
return(newArray.Slice(0, newLen));
}
}
internal static ArraySliceObj Concat(NeSeqObj left, NeSeqObj right)
{
return(PaddedArray.Create(left, right));
}
internal static ArraySliceObj Append(NeSeqObj seq, Obj obj)
{
return(PaddedArray.Create(seq, obj));
}