/// <summary>
/// Removes top three stack items and converts them to <see cref="long"/>s: value, Min, Max.
/// Pushes 1 if value was in range, otherwise 0.
/// Return value indicates success.
/// </summary>
/// <param name="opData">Data to use</param>
/// <param name="error">Error message (null if sucessful, otherwise will contain information about the failure)</param>
/// <returns>True if operation was successful, false if otherwise</returns>
public override bool Run(IOpData opData, out string error)
{
if (opData.ItemCount < 3)
{
error = "Invalid number of elements in stack.";
return(false);
}
// Stack is: x then min then max so we pop max first
if (!OpHelper.TryConvertByteArrayToInt(opData.Pop(), out long max, true))
{
error = "Couldn't convert to number.";
return(false);
}
if (!OpHelper.TryConvertByteArrayToInt(opData.Pop(), out long min, true))
{
error = "Couldn't convert to number.";
return(false);
}
if (!OpHelper.TryConvertByteArrayToInt(opData.Pop(), out long x, true))
{
error = "Couldn't convert to number.";
return(false);
}
int c = (x >= min && x < max) ? 1 : 0;
opData.Push(OpHelper.IntToByteArray(c));
error = null;
return(true);
}
/// <summary>
/// Pushes the number of stack items onto the stack. Return value indicates success.
/// </summary>
/// <param name="opData">Data to use</param>
/// <param name="error">Error message (null if sucessful, otherwise will contain information about the failure)</param>
/// <returns>True if operation was successful, false if otherwise</returns>
public override bool Run(IOpData opData, out string error)
{
opData.Push(OpHelper.IntToByteArray(opData.ItemCount));
error = null;
return(true);
}
/// <summary>
/// Replaces top two stack items interpreted as <see cref="long"/>s with their subtract result. Return value indicates success.
/// </summary>
/// <param name="opData">Data to use</param>
/// <param name="error">Error message (null if sucessful, otherwise will contain information about the failure)</param>
/// <returns>True if operation was successful, false if otherwise</returns>
public override bool Run(IOpData opData, out string error)
{
if (!TrySetValues(opData, out error))
{
return(false);
}
opData.Push(OpHelper.IntToByteArray(a - b));
error = null;
return(true);
}
/// <summary>
/// Replaces top two stack items interpreted as <see cref="long"/>s with 1 if either one is not 0, otherwise with 0.
/// Return value indicates success.
/// </summary>
/// <param name="opData">Data to use</param>
/// <param name="error">Error message (null if sucessful, otherwise will contain information about the failure)</param>
/// <returns>True if operation was successful, false if otherwise</returns>
public override bool Run(IOpData opData, out string error)
{
if (!TrySetValues(opData, out error))
{
return(false);
}
int c = (a != 0 || b != 0) ? 1 : 0;
opData.Push(OpHelper.IntToByteArray(c));
error = null;
return(true);
}
/// <summary>
/// Pushes the size of the top stack item to the stack. Return value indicates success.
/// </summary>
/// <param name="opData">Data to use</param>
/// <param name="error">Error message (null if sucessful, otherwise will contain information about the failure)</param>
/// <returns>True if operation was successful, false if otherwise</returns>
public bool Run(IOpData opData, out string error)
{
if (opData.ItemCount < 1)
{
error = "There was not enough items left in the stack.";
return(false);
}
byte[] temp = opData.Peek();
opData.Push(OpHelper.IntToByteArray(temp.Length));
error = null;
return(true);
}
