private string Stringify(double token, DataType type, HashLookup <string> debugSymbols)
{
switch (type)
{
case DataType.Invalid: return("");
case DataType.NoValue: return("");
case DataType.VariableRef:
var rref = NanTags.DecodeVariableRef(token);
if (debugSymbols?.ContainsKey(rref) == true)
{
return("'" + debugSymbols[rref] + "' (" + rref.ToString("X") + ")");
}
return(rref.ToString("X"));
case DataType.Opcode:
NanTags.DecodeLongOpCode(token, out var ccls, out var cact, out var refr);
if (ccls == 'm')
{
if (debugSymbols?.ContainsKey(refr) == true)
{
return(ccls + "" + cact + " '" + debugSymbols[refr] + "' (" + refr.ToString("X") + ")");
}
}
if (ccls == 'i')
{
if (debugSymbols?.ContainsKey(refr) == true)
{
return("Incr " + ((sbyte)cact) + " '" + debugSymbols[refr] + "' (" + refr.ToString("X") + ")");
}
}
NanTags.DecodeOpCode(token, out _, out _, out var p1, out var p2);
return(ccls + "" + cact + " (" + p1 + ", " + p2 + ")");
case DataType.ValSmallString:
return("[" + NanTags.DecodeShortStr(token) + "]");
case DataType.PtrHashtable:
case DataType.PtrGrid:
case DataType.PtrSet:
case DataType.PtrVector:
case DataType.PtrString:
case DataType.PtrStaticString:
NanTags.DecodePointer(token, out var targ, out _);
return(" -> " + targ);
case DataType.ValInt32: return(NanTags.DecodeInt32(token).ToString());
case DataType.ValUInt32: return(NanTags.DecodeUInt32(token).ToString());
case DataType.Number: return(token.ToString(CultureInfo.InvariantCulture));
default:
throw new ArgumentOutOfRangeException(nameof(type), type, null);
}
}
/// <summary>
/// Produce a diagnostic description of the memory layout
/// </summary>
public string ToString(HashLookup <string> debugSymbols)
{
int index = 0;
var sb = new StringBuilder();
// Try to display static strings meaningfully
if (NanTags.TypeOf(encodedTokens[0]) == DataType.Opcode)
{
index = 1;
NanTags.DecodeLongOpCode(encodedTokens[0], out var c1, out var c2, out var count);
if (c1 == 'c' && c2 == 's')
{
sb.AppendLine("Data table: " + count + " tokens (" + (count * 8) + " bytes)");
while (index < count)
{
var length = NanTags.DecodeUInt32(encodedTokens[index]);
var chunkCount = (int)Math.Ceiling(length / 8.0d);
sb.Append(" " + index + ": (" + length + ") [");
index++;
for (var ch = 0; ch < chunkCount; ch++)
{
var raw = BitConverter.GetBytes(encodedTokens[index++]);
sb.Append(MakeSafe(Encoding.ASCII.GetString(raw)));
}
sb.AppendLine("]");
}
sb.AppendLine("End of data table");
}
}
// output remaining bytecodes
for (; index < encodedTokens.Count; index++)
{
var token = encodedTokens[index];
var type = NanTags.TypeOf(token);
sb.Append(index.ToString());
sb.Append(" ");
sb.Append(type.ToString());
sb.Append(": ");
sb.AppendLine(Stringify(token, type, debugSymbols));
}
return(sb.ToString());
}