public static void WriteDatum(this BinaryWriter w, Datum d)
{
SymbolCollector sc = new SymbolCollector();
SetDatum symbols = d.Visit(sc);
MutableBoxCollector mc = new MutableBoxCollector();
SetDatum mutableBoxes = d.Visit(mc);
DictionaryDatum symbolMap = DictionaryDatum.Empty;
ListDatum uninternedSymbols = ListDatum.Empty;
ListDatum internedSymbols = ListDatum.Empty;
DictionaryDatum mutableBoxMap = DictionaryDatum.Empty;
foreach (SymbolDatum s in symbols.Cast <SymbolDatum>())
{
if (s.IsInterned)
{
internedSymbols = internedSymbols.Add(s);
}
else
{
uninternedSymbols = uninternedSymbols.Add(s);
}
}
w.Write(uninternedSymbols.Count);
foreach (int i in Enumerable.Range(0, uninternedSymbols.Count))
{
symbolMap = symbolMap.Add(uninternedSymbols[i], new IntDatum((BigInteger)(~i)));
}
w.Write(internedSymbols.Count);
foreach (int i in Enumerable.Range(0, internedSymbols.Count))
{
symbolMap = symbolMap.Add(internedSymbols[i], new IntDatum((BigInteger)i));
w.Write(((SymbolDatum)(internedSymbols[i])).Name);
}
w.Write(mutableBoxes.Count);
foreach (int i in Enumerable.Range(0, mutableBoxes.Count))
{
mutableBoxMap = mutableBoxMap.Add(mutableBoxes[i], new IntDatum((BigInteger)i));
}
BinaryWriteVisitor v = new BinaryWriteVisitor(w, symbolMap, mutableBoxMap);
foreach (int i in Enumerable.Range(0, mutableBoxes.Count))
{
((MutableBoxDatum)mutableBoxes[i]).Content.Visit(v);
}
d.Visit(v);
}
public static Datum ReadDatum(this BinaryReader r)
{
int uninternedSymbolCount = r.ReadInt32();
ListDatum uninternedSymbols = ListDatum.Empty;
for (int i = 0; i < uninternedSymbolCount; ++i)
{
uninternedSymbols = uninternedSymbols.Add(new SymbolDatum());
}
int internedSymbolCount = r.ReadInt32();
ListDatum internedSymbols = ListDatum.Empty;
for (int i = 0; i < internedSymbolCount; ++i)
{
string name = r.ReadString();
internedSymbols = internedSymbols.Add(new SymbolDatum(name));
}
int mutableBoxCount = r.ReadInt32();
ListDatum mutableBoxes = ListDatum.Empty;
for (int i = 0; i < mutableBoxCount; ++i)
{
mutableBoxes = mutableBoxes.Add(new MutableBoxDatum(NullDatum.Value));
}
Func <Datum> read = null;
read = delegate()
{
byte typeId = r.ReadByte();
switch (typeId)
{
case B_NULL:
return(NullDatum.Value);
case B_BOOLEAN_FALSE:
return(BooleanDatum.False);
case B_BOOLEAN_TRUE:
return(BooleanDatum.True);
case B_CHAR:
{
char ch = r.ReadChar();
return(new CharDatum(ch));
}
case B_STRING:
{
string str = r.ReadString();
return(new StringDatum(str));
}
case B_INT:
{
BigInteger b = r.ReadBigInteger();
return(new IntDatum(b));
}
case B_FLOAT:
{
double f = r.ReadDouble();
return(new FloatDatum(f));
}
case B_BYTE_ARRAY:
{
int nBytes = r.ReadInt32();
byte[] buf = new byte[nBytes];
int bytesRead = r.Read(buf, 0, nBytes);
if (bytesRead != nBytes)
{
throw new EndOfStreamException();
}
return(ByteArrayDatum.FromByteArray(buf));
}
case B_SYMBOL:
{
int index = r.ReadInt32();
if (index < 0)
{
return(uninternedSymbols[~index]);
}
else
{
return(internedSymbols[index]);
}
}
case B_LIST:
{
int count = r.ReadInt32();
ListDatum l = ListDatum.Empty;
foreach (int i in Enumerable.Range(0, count))
{
l = l.Add(read());
}
return(l);
}
case B_SET:
{
int count = r.ReadInt32();
SetDatum s = SetDatum.Empty;
foreach (int i in Enumerable.Range(0, count))
{
s = s.Add(read());
}
return(s);
}
case B_DICTIONARY:
{
int count = r.ReadInt32();
DictionaryDatum d = DictionaryDatum.Empty;
foreach (int i in Enumerable.Range(0, count))
{
Datum k = read();
Datum v = read();
d = d.Add(k, v);
}
return(d);
}
case B_MUTABLE_BOX:
{
int index = r.ReadInt32();
return(mutableBoxes[index]);
}
case B_RATIONAL:
{
BigInteger numerator = r.ReadBigInteger();
BigInteger denominator = r.ReadBigInteger();
return(new RationalDatum(new BigRational(numerator, denominator)));
}
case B_GUID:
{
byte[] buf = new byte[16];
int bytesRead = r.Read(buf, 0, 16);
if (bytesRead < 16)
{
throw new EndOfStreamException();
}
return(new GuidDatum(new Guid(buf)));
}
default:
throw new FormatException("Unknown type id");
}
};
for (int j = 0; j < mutableBoxCount; ++j)
{
((MutableBoxDatum)mutableBoxes[j]).Content = read();
}
return(read());
}