private void ReplaceLabels(List<Opcode> program)
{
var labels = new Dictionary<string, int>();
// get the index of every label
for (int index = 0; index < program.Count; index++)
{
if (program[index].Label != string.Empty)
{
if (labels.ContainsKey(program[index].Label))
{
if (program[index].Label.EndsWith("-default"))
continue;
// This is one of those "should never happen" errors that if it happens
// it means kOS devs screwed up - so dump the partially relabeled program
// to the log just to help in diagnosing the bug report that may happen:
//
Utilities.SafeHouse.Logger.LogError("=====Relabeled Program so far is: =========");
Utilities.SafeHouse.Logger.LogError(Utilities.Debug.GetCodeFragment(program));
throw new Exceptions.KOSCompileException(LineCol.Unknown(), string.Format(
"ProgramBuilder.ReplaceLabels: Cannot add label {0}, label already exists. Opcode: {1}", program[index].Label, program[index].ToString()));
}
labels.Add(program[index].Label, index);
}
}
// replace destination labels with the corresponding index
for (int index = 0; index < program.Count; index++)
{
Opcode opcode = program[index];
if (string.IsNullOrEmpty(opcode.DestinationLabel)) continue;
if (!labels.ContainsKey(opcode.DestinationLabel))
{
Utilities.SafeHouse.Logger.LogError("=====Relabeled Program so far is: =========");
Utilities.SafeHouse.Logger.LogError(Utilities.Debug.GetCodeFragment(program));
throw new Exceptions.KOSCompileException(LineCol.Unknown(), string.Format(
"ProgramBuilder.ReplaceLabels: Cannot find label {0}. Opcode: {1}", opcode.DestinationLabel, opcode.ToString()));
}
int destinationIndex = labels[opcode.DestinationLabel];
if (opcode is BranchOpcode)
{
((BranchOpcode)opcode).Distance = destinationIndex - index;
}
else if (opcode is OpcodePushRelocateLater)
{
// Replace the OpcodePushRelocateLater with the proper OpcodePush:
Opcode newOp;
if (opcode is OpcodePushDelegateRelocateLater)
{
newOp = new OpcodePushDelegate(destinationIndex, ((OpcodePushDelegateRelocateLater)opcode).WithClosure);
}
else
newOp = new OpcodePush(destinationIndex);
newOp.SourcePath = opcode.SourcePath;
newOp.SourceLine = opcode.SourceLine;
newOp.SourceColumn = opcode.SourceColumn;
newOp.Label = opcode.Label;
program[index] = newOp;
}
else if (opcode is OpcodeCall)
{
((OpcodeCall)opcode).Destination = destinationIndex;
}
}
// complete the entry point address of all the objects
foreach (var objectFile in objectFiles.Values)
{
if (objectFile.EntryPointLabel != string.Empty)
objectFile.EntryPointAddress = labels[objectFile.EntryPointLabel];
}
}
private void ReplaceLabels(List<Opcode> program)
{
var labels = new Dictionary<string, int>();
// get the index of every label
for (int index = 0; index < program.Count; index++)
{
if (program[index].Label != string.Empty)
{
labels.Add(program[index].Label, index);
}
}
// replace destination labels with the corresponding index
for (int index = 0; index < program.Count; index++)
{
Opcode opcode = program[index];
if (string.IsNullOrEmpty(opcode.DestinationLabel)) continue;
int destinationIndex = labels[opcode.DestinationLabel];
if (opcode is BranchOpcode)
{
((BranchOpcode)opcode).Distance = destinationIndex - index;
}
else if (opcode is OpcodePushRelocateLater)
{
// Replace the OpcodePushRelocateLater with the proper OpcodePush:
Opcode newOp;
if (opcode is OpcodePushDelegateRelocateLater)
{
newOp = new OpcodePushDelegate(destinationIndex, ((OpcodePushDelegateRelocateLater)opcode).WithClosure);
}
else
newOp = new OpcodePush(destinationIndex);
newOp.SourceName = opcode.SourceName;
newOp.SourceLine = opcode.SourceLine;
newOp.SourceColumn = opcode.SourceColumn;
newOp.Label = opcode.Label;
program[index] = newOp;
}
else if (opcode is OpcodeCall)
{
((OpcodeCall)opcode).Destination = destinationIndex;
}
}
// complete the entry point address of all the objects
foreach (var objectFile in objectFiles.Values)
{
if (objectFile.EntryPointLabel != string.Empty)
objectFile.EntryPointAddress = labels[objectFile.EntryPointLabel];
}
}