public Testing2.String Substring(int startIndex, int aLength)
{
if (startIndex >= this.length)
{
if (aLength == 0)
{
return(New(0));
}
UART.Write("IndexOutOfRangeException! Substring.");
//ExceptionMethods.Throw(new Exceptions.IndexOutOfRangeException(startIndex, this.length));
}
else if (aLength > length - startIndex)
{
aLength = length - startIndex;
}
Testing2.String result = New(aLength);
for (int i = startIndex; i < aLength + startIndex; i++)
{
result[i - startIndex] = this[i];
}
return(result);
}
public static unsafe void Clear()
{
if (!Initialised)
{
return;
}
//Clear out every character on the screen
int numToClear = rows * cols;
//Start at beginning of video memory
//char* vidMemPtr = vidMemBasePtr;
//Loop through all video memory
while (numToClear > 0)
{
//Set output to no character, no foreground colour, just the
// background colour.
UART.Write(' ');
//And decrement the count
numToClear--;
}
WriteLine();
}
public void aMethodVoid()
{
UART.Write("Class method void right\n");
}
public static void *NewArr(int length, Testing2.Type elemType)
{
if (!Enabled)
{
BasicConsole.SetTextColour(BasicConsole.warning_colour);
BasicConsole.WriteLine("Warning! GC returning null pointer because GC not enabled.");
BasicConsole.DelayOutput(10);
BasicConsole.SetTextColour(BasicConsole.default_colour);
return(null);
}
//try
{
if (length < 0)
{
UART.Write("length < 0. Overflow exception.");
return(null);
//ExceptionMethods.Throw_OverflowException();
}
InsideGC = true;
//Alloc space for GC header that prefixes object data
//Alloc space for new array object
//Alloc space for new array elems
uint totalSize = ((Testing2.Type) typeof(Testing2.Array)).Size;
if (elemType.IsValueType)
{
totalSize += elemType.Size * (uint)length;
}
else
{
totalSize += elemType.StackSize * (uint)length;
}
totalSize += (uint)sizeof(GCHeader);
GCHeader *newObjPtr = (GCHeader *)Heap.AllocZeroed(totalSize, "GC : NewArray");
if ((UInt32)newObjPtr == 0)
{
InsideGC = false;
BasicConsole.SetTextColour(BasicConsole.error_colour);
BasicConsole.WriteLine("Error! GC can't create a new array because the heap returned a null pointer.");
BasicConsole.DelayOutput(10);
BasicConsole.SetTextColour(BasicConsole.default_colour);
return(null);
}
NumObjs++;
//Initialise the GCHeader
SetSignature(newObjPtr);
newObjPtr->RefCount = 1;
Testing2.Array newArr = (Testing2.Array)Utilities.ObjectUtilities.GetObject(newObjPtr + 1);
newArr._Type = (Testing2.Type) typeof(Testing2.Array);
newArr.length = length;
newArr.elemType = elemType;
//Move past GCHeader
byte *newObjBytePtr = (byte *)(newObjPtr + 1);
InsideGC = false;
return(newObjBytePtr);
}
//finally
{
}
}
