/// <summary>
/// Visit a parse tree produced by <see cref="Z80TestParser.portMock"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public override object VisitPortMock(Z80TestParser.PortMockContext context)
{
if (IsInvalidContext(context))
{
return(null);
}
var node = new PortMockMemberNode(context, (ExpressionNode)VisitExpr(context.expr()));
foreach (var pulse in context.portPulse())
{
node.Pulses.Add((PortPulseNode)VisitPortPulse(pulse));
}
return(node);
}
/// <summary>
/// Visit a port mock member
/// </summary>
/// <param name="plan">Test file plan</param>
/// <param name="testSetPlan">TestSetPlan to visit</param>
/// <param name="portMockMember">Port mock syntax node</param>
private void VisitPortMockMember(TestFilePlan plan, TestSetPlan testSetPlan, PortMockMemberNode portMockMember)
{
// --- Check ID duplication
var id = portMockMember.Id;
if (testSetPlan.ContainsSymbol(id))
{
ReportError(Errors.T0006, plan, portMockMember.IdSpan, id);
return;
}
// --- Get port address
var portAddress = Eval(plan, testSetPlan, portMockMember.Expr);
var portMock = portAddress != null ? new PortMockPlan(portAddress.AsWord()) : null;
// --- Get pulses
var pulsesOk = true;
var nextPulseStart = 0L;
foreach (var pulse in portMockMember.Pulses)
{
// --- Get pulse expression values
var value = Eval(plan, testSetPlan, pulse.ValueExpr);
var pulse1 = Eval(plan, testSetPlan, pulse.Pulse1Expr);
if (value == null || pulse1 == null)
{
pulsesOk = false;
continue;
}
ExpressionValue pulse2 = null;
if (pulse.Pulse2Expr != null)
{
pulse2 = Eval(plan, testSetPlan, pulse.Pulse2Expr);
if (pulse2 == null)
{
pulsesOk = false;
continue;
}
}
// --- Create a new pulse
PortPulsePlan pulsePlan;
if (pulse2 == null)
{
// --- We have only value and length
pulsePlan = new PortPulsePlan(value.AsByte(), nextPulseStart,
nextPulseStart + pulse1.AsNumber() - 1);
}
else
{
// --- We have pulse value, start, and end
pulsePlan = new PortPulsePlan(value.AsByte(), pulse1.AsNumber(),
pulse.IsInterval ? pulse2.AsNumber() : pulse1.AsNumber() + pulse2.AsNumber() - 1);
}
nextPulseStart = pulsePlan.EndTact + 1;
portMock?.AddPulse(pulsePlan);
}
// --- Create the entire port mock
if (portMock != null && pulsesOk)
{
testSetPlan.SetPortMock(id, portMock);
}
}
