public static void StepOver()
{
long prognum = Mem.GetByte(MemPos.prog);
long linenum = Mem.GetNum(MemPos.progline, 2);
SetBreakpoint(prognum, linenum + 1, true);
}
public static void Push()
{
StackItem item = new StackItem();
item.prog = Mem.GetByte(MemPos.prog);
item.progline = Mem.GetNum(MemPos.progline, 2);
_gosubstack.Push(item);
}
private static void ExecuteAlphaAssignment()
{
long?targetPos = null;
bool isBuffer = false;
targetPos = MemPos.GetPosAlpha(_tokens[_tokenNum]);
if (!targetPos.HasValue)
{
targetPos = MemPos.GetPosBufferAlpha(_tokens[_tokenNum]);
if (targetPos.HasValue)
{
isBuffer = true;
}
}
if (!targetPos.HasValue)
{
throw new SystemException("Cannot parse alpha assignment: Target not found");
}
_tokenNum++;
if (_tokens[_tokenNum] == "[")
{
_tokenNum++; // "["
long offset = GetNumericExpression();
if (_tokens[_tokenNum++] != "]")
{
throw new SystemException("ExecuteAlphaAssignment: No closing \"]\"");
}
targetPos += offset;
}
if (_tokens[_tokenNum] != "=")
{
throw new SystemException("Cannot parse alpha expression: Equals sign expected");
}
_tokenNum++;
string result = GetAlphaExpression();
if (isBuffer)
{
long bufferTargetPos = Mem.GetByte(targetPos.Value)
+ (256 * Mem.GetByte(targetPos.Value + 1));
Mem.SetAlpha(bufferTargetPos, result);
if (result == "")
{
bufferTargetPos += 1;
}
else
{
bufferTargetPos += result.Length;
}
Mem.SetByte(targetPos.Value + 1, bufferTargetPos / 256);
Mem.SetByte(targetPos.Value, bufferTargetPos % 256);
}
else
{
Mem.SetAlpha(targetPos.Value, result);
}
}
public static void Run()
{
long prognum;
long linenum;
while (true)
{
// get current program and line
prognum = Mem.GetByte(MemPos.prog);
linenum = Mem.GetNum(MemPos.progline, 2);
// do debug events as needed
Debug.RaiseProgLine(prognum, linenum);
if (Debug.HasBreakpoint(prognum, linenum))
{
Debug.RaiseBreakpoint(prognum, linenum);
}
// handle current line
_lineText = ILCode.GetLine(prognum, linenum);
_tokens = _lineText.Split('\t');
_tokenCount = _tokens.GetUpperBound(0) + 1;
_tokenNum = 0;
if (Functions.IsNumber(_tokens[_tokenNum]))
{
_tokenNum++; // line number
}
try
{
// move to next line in preparation, could be changed by command
Mem.SetNum(MemPos.progline, 2, linenum + 1);
ExecuteLine();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
throw;
}
}
}
private static long GetNumericValue()
{
string currToken = _tokens[_tokenNum++];
if (Functions.IsNumber(currToken))
{
return(long.Parse(currToken));
}
if (currToken == "FALSE")
{
return(0);
}
if (currToken == "TRUE")
{
return(1);
}
long?targetPos = null;
long?targetSize = null;
bool?isTargetByte = null;
bool?isBuffer = null;
targetPos = MemPos.GetPosByte(currToken);
if (targetPos.HasValue)
{
targetSize = 1;
isTargetByte = true;
isBuffer = false;
}
else
{
targetPos = MemPos.GetPosNumeric(currToken);
if (targetPos.HasValue)
{
targetSize = MemPos.GetSizeNumeric(currToken);
isTargetByte = false;
isBuffer = false;
}
else
{
targetPos = MemPos.GetPosBufferPtr(currToken);
if (targetPos.HasValue)
{
if (_tokens[_tokenNum] == "(")
{
_tokenNum++;
targetSize = GetNumericValue();
_tokenNum++;
isTargetByte = false;
isBuffer = true;
}
}
}
}
if (!targetPos.HasValue || !targetSize.HasValue || !isTargetByte.HasValue || !isBuffer.HasValue)
{
throw new SystemException("GetNumericValue error");
}
if (_tokenNum < _tokenCount && _tokens[_tokenNum] == "[")
{
_tokenNum++; // "["
long offset = GetNumericExpression();
if (_tokens[_tokenNum++] != "]")
{
throw new SystemException("GetNumericValue: No closing \"]\"");
}
targetPos += offset;
}
if (isTargetByte.Value)
{
return(Mem.GetByte(targetPos.Value));
}
if (isBuffer.Value)
{
return(Mem.GetNumBuffer(targetPos.Value, targetSize.Value));
}
return(Mem.GetNum(targetPos.Value, targetSize.Value));
}
public static bool IsStay()
{
return(Mem.GetByte(MemPos.charval) == 255);
}