/// <summary>
/// Reads an *implementation specific* bundled .NET object, including (as options) type-metadata, identity/re-use, etc.
/// </summary>
public static object ReadNetObject(object value, ProtoReader source, int key, Type type, NetObjectOptions options)
{
SubItemToken token = ProtoReader.StartSubItem(source);
int fieldNumber;
int newObjectKey = -1, newTypeKey = -1, tmp;
while ((fieldNumber = source.ReadFieldHeader()) > 0)
{
switch (fieldNumber)
{
case FieldExistingObjectKey:
tmp = source.ReadInt32();
value = source.NetCache.GetKeyedObject(tmp);
break;
case FieldNewObjectKey:
newObjectKey = source.ReadInt32();
break;
case FieldExistingTypeKey:
tmp = source.ReadInt32();
type = (Type)source.NetCache.GetKeyedObject(tmp);
key = source.GetTypeKey(ref type);
break;
case FieldNewTypeKey:
newTypeKey = source.ReadInt32();
break;
case FieldTypeName:
string typeName = source.ReadString();
type = source.DeserializeType(typeName);
if (type == null)
{
throw new ProtoException("Unable to resolve type: " + typeName + " (you can use the TypeModel.DynamicTypeFormatting event to provide a custom mapping)");
}
if (type == typeof(string))
{
key = -1;
}
else
{
key = source.GetTypeKey(ref type);
if (key < 0)
{
throw new InvalidOperationException("Dynamic type is not a contract-type: " + type.Name);
}
}
break;
case FieldObject:
bool isString = type == typeof(string);
bool wasNull = value == null;
bool lateSet = wasNull && (isString || ((options & NetObjectOptions.LateSet) != 0));
if (newObjectKey >= 0 && !lateSet)
{
if (value == null)
{
source.TrapNextObject(newObjectKey);
}
else
{
source.NetCache.SetKeyedObject(newObjectKey, value);
}
if (newTypeKey >= 0)
{
source.NetCache.SetKeyedObject(newTypeKey, type);
}
}
object oldValue = value;
if (isString)
{
value = source.ReadString();
}
else
{
value = ProtoReader.ReadTypedObject(oldValue, key, source, type);
}
if (newObjectKey >= 0)
{
if (wasNull && !lateSet)
{ // this both ensures (via exception) that it *was* set, and makes sure we don't shout
// about changed references
oldValue = source.NetCache.GetKeyedObject(newObjectKey);
}
if (lateSet)
{
source.NetCache.SetKeyedObject(newObjectKey, value);
if (newTypeKey >= 0)
{
source.NetCache.SetKeyedObject(newTypeKey, type);
}
}
}
if (newObjectKey >= 0 && !lateSet && !ReferenceEquals(oldValue, value))
{
throw new ProtoException("A reference-tracked object changed reference during deserialization");
}
if (newObjectKey < 0 && newTypeKey >= 0)
{ // have a new type, but not a new object
source.NetCache.SetKeyedObject(newTypeKey, type);
}
break;
default:
source.SkipField();
break;
}
}
if (newObjectKey >= 0 && (options & NetObjectOptions.AsReference) == 0)
{
throw new ProtoException("Object key in input stream, but reference-tracking was not expected");
}
ProtoReader.EndSubItem(token, source);
return(value);
}
private static long ReadTimeSpanTicks(ProtoReader source, out DateTimeKind kind)
{
kind = DateTimeKind.Unspecified;
switch (source.WireType)
{
case WireType.String:
case WireType.StartGroup:
SubItemToken token = ProtoReader.StartSubItem(source);
int fieldNumber;
TimeSpanScale scale = TimeSpanScale.Days;
long value = 0;
while ((fieldNumber = source.ReadFieldHeader()) > 0)
{
switch (fieldNumber)
{
case FieldTimeSpanScale:
scale = (TimeSpanScale)source.ReadInt32();
break;
case FieldTimeSpanValue:
source.Assert(WireType.SignedVariant);
value = source.ReadInt64();
break;
case FieldTimeSpanKind:
kind = (DateTimeKind)source.ReadInt32();
switch (kind)
{
case DateTimeKind.Unspecified:
case DateTimeKind.Utc:
case DateTimeKind.Local:
break; // fine
default:
throw new ProtoException("Invalid date/time kind: " + kind.ToString());
}
break;
default:
source.SkipField();
break;
}
}
ProtoReader.EndSubItem(token, source);
switch (scale)
{
case TimeSpanScale.Days:
return(value * TimeSpan.TicksPerDay);
case TimeSpanScale.Hours:
return(value * TimeSpan.TicksPerHour);
case TimeSpanScale.Minutes:
return(value * TimeSpan.TicksPerMinute);
case TimeSpanScale.Seconds:
return(value * TimeSpan.TicksPerSecond);
case TimeSpanScale.Milliseconds:
return(value * TimeSpan.TicksPerMillisecond);
case TimeSpanScale.Ticks:
return(value);
case TimeSpanScale.MinMax:
switch (value)
{
case 1: return(long.MaxValue);
case -1: return(long.MinValue);
default: throw new ProtoException("Unknown min/max value: " + value.ToString());
}
default:
throw new ProtoException("Unknown timescale: " + scale.ToString());
}
case WireType.Fixed64:
return(source.ReadInt64());
default:
throw new ProtoException("Unexpected wire-type: " + source.WireType.ToString());
}
}
private static void EndSubItem(SubItemToken token, ProtoWriter writer, PrefixStyle style)
{
if (writer == null)
{
throw new ArgumentNullException("writer");
}
if (writer.wireType != WireType.None)
{
throw CreateException(writer);
}
int value = (int)token.value64;
if (writer.depth <= 0)
{
throw CreateException(writer);
}
if (writer.depth-- > RecursionCheckDepth)
{
writer.PopRecursionStack();
}
writer.packedFieldNumber = 0; // ending the sub-item always wipes packed encoding
if (value < 0)
{ // group - very simple append
WriteHeaderCore(-value, WireType.EndGroup, writer);
writer.wireType = WireType.None;
return;
}
// so we're backfilling the length into an existing sequence
int len;
switch (style)
{
case PrefixStyle.Fixed32:
len = (int)((writer.ioIndex - value) - 4);
ProtoWriter.WriteInt32ToBuffer(len, writer.ioBuffer, value);
break;
case PrefixStyle.Fixed32BigEndian:
len = (int)((writer.ioIndex - value) - 4);
byte[] buffer = writer.ioBuffer;
ProtoWriter.WriteInt32ToBuffer(len, buffer, value);
// and swap the byte order
byte b = buffer[value];
buffer[value] = buffer[value + 3];
buffer[value + 3] = b;
b = buffer[value + 1];
buffer[value + 1] = buffer[value + 2];
buffer[value + 2] = b;
break;
case PrefixStyle.Base128:
// string - complicated because we only reserved one byte;
// if the prefix turns out to need more than this then
// we need to shuffle the existing data
len = (int)((writer.ioIndex - value) - 1);
int offset = 0;
uint tmp = (uint)len;
while ((tmp >>= 7) != 0)
{
offset++;
}
if (offset == 0)
{
writer.ioBuffer[value] = (byte)(len & 0x7F);
}
else
{
DemandSpace(offset, writer);
byte[] blob = writer.ioBuffer;
Buffer.BlockCopy(blob, value + 1, blob, value + 1 + offset, len);
tmp = (uint)len;
do
{
blob[value++] = (byte)((tmp & 0x7F) | 0x80);
} while ((tmp >>= 7) != 0);
blob[value - 1] = (byte)(blob[value - 1] & ~0x80);
writer.position64 += offset;
writer.ioIndex += offset;
}
break;
default:
throw new ArgumentOutOfRangeException("style");
}
// and this object is no longer a blockage - also flush if sensible
const int ADVISORY_FLUSH_SIZE = 1024;
if (--writer.flushLock == 0 && writer.ioIndex >= ADVISORY_FLUSH_SIZE)
{
ProtoWriter.Flush(writer);
}
}
private static void WriteTimeSpanImpl(TimeSpan timeSpan, ProtoWriter dest, DateTimeKind kind)
{
if (dest == null)
{
throw new ArgumentNullException(nameof(dest));
}
long value;
switch (dest.WireType)
{
case WireType.String:
case WireType.StartGroup:
TimeSpanScale scale;
value = timeSpan.Ticks;
if (timeSpan == TimeSpan.MaxValue)
{
value = 1;
scale = TimeSpanScale.MinMax;
}
else if (timeSpan == TimeSpan.MinValue)
{
value = -1;
scale = TimeSpanScale.MinMax;
}
else if (value % TimeSpan.TicksPerDay == 0)
{
scale = TimeSpanScale.Days;
value /= TimeSpan.TicksPerDay;
}
else if (value % TimeSpan.TicksPerHour == 0)
{
scale = TimeSpanScale.Hours;
value /= TimeSpan.TicksPerHour;
}
else if (value % TimeSpan.TicksPerMinute == 0)
{
scale = TimeSpanScale.Minutes;
value /= TimeSpan.TicksPerMinute;
}
else if (value % TimeSpan.TicksPerSecond == 0)
{
scale = TimeSpanScale.Seconds;
value /= TimeSpan.TicksPerSecond;
}
else if (value % TimeSpan.TicksPerMillisecond == 0)
{
scale = TimeSpanScale.Milliseconds;
value /= TimeSpan.TicksPerMillisecond;
}
else
{
scale = TimeSpanScale.Ticks;
}
SubItemToken token = ProtoWriter.StartSubItem(null, dest);
if (value != 0)
{
ProtoWriter.WriteFieldHeader(FieldTimeSpanValue, WireType.SignedVariant, dest);
ProtoWriter.WriteInt64(value, dest);
}
if (scale != TimeSpanScale.Days)
{
ProtoWriter.WriteFieldHeader(FieldTimeSpanScale, WireType.Variant, dest);
ProtoWriter.WriteInt32((int)scale, dest);
}
if (kind != DateTimeKind.Unspecified)
{
ProtoWriter.WriteFieldHeader(FieldTimeSpanKind, WireType.Variant, dest);
ProtoWriter.WriteInt32((int)kind, dest);
}
ProtoWriter.EndSubItem(token, dest);
break;
case WireType.Fixed64:
ProtoWriter.WriteInt64(timeSpan.Ticks, dest);
break;
default:
throw new ProtoException("Unexpected wire-type: " + dest.WireType.ToString());
}
}
/// <summary>
/// Indicates the end of a nested record.
/// </summary>
/// <param name="token">The token obtained from StartubItem.</param>
/// <param name="writer">The destination.</param>
public static void EndSubItem(SubItemToken token, ProtoWriter writer)
{
EndSubItem(token, writer, PrefixStyle.Base128);
}
