private int Encode()
{
EETypeOptionalFieldsElement eLastTag = EETypeOptionalFieldsElement.Count;
for (EETypeOptionalFieldsElement eTag = 0; eTag < EETypeOptionalFieldsElement.Count; eTag++)
{
eLastTag = _rgFields[(int)eTag]._fieldPresent ? eTag : eLastTag;
}
if (eLastTag == EETypeOptionalFieldsElement.Count)
{
return(0);
}
_encoder = new NativePrimitiveEncoder();
_encoder.Init();
for (EETypeOptionalFieldsElement eTag = 0; eTag < EETypeOptionalFieldsElement.Count; eTag++)
{
if (!_rgFields[(int)eTag]._fieldPresent)
{
continue;
}
_encoder.WriteByte((byte)((byte)eTag | (eTag == eLastTag ? 0x80 : 0)));
_encoder.WriteUnsigned(_rgFields[(int)eTag]._value);
}
return(_encoder.Size);
}
/// <summary>
/// From a string, get a pointer to an allocated memory location that holds a NativeFormat encoded string.
/// This is used for the creation of RuntimeFieldHandles from metadata.
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public IntPtr GetNativeFormatStringForString(string str)
{
using (LockHolder.Hold(_typeLoaderLock))
{
IntPtr result;
if (_nativeFormatStrings.TryGetValue(str, out result))
{
return(result);
}
NativePrimitiveEncoder stringEncoder = new NativePrimitiveEncoder();
stringEncoder.Init();
byte[] utf8Bytes = Encoding.UTF8.GetBytes(str);
stringEncoder.WriteUnsigned(checked ((uint)utf8Bytes.Length));
foreach (byte b in utf8Bytes)
{
stringEncoder.WriteByte(b);
}
IntPtr allocatedNativeFormatString = MemoryHelpers.AllocateMemory(stringEncoder.Size);
unsafe
{
stringEncoder.Save((byte *)allocatedNativeFormatString.ToPointer(), stringEncoder.Size);
}
_nativeFormatStrings.Add(str, allocatedNativeFormatString);
return(allocatedNativeFormatString);
}
}
// Helper method to serialize the data-blob type and flags
public static void SerializeDataBlobTypeAndFlags(ref NativePrimitiveEncoder encoder, SerializedDataBlobKind blobType, byte flags)
{
// make sure that blobType fits in 2 bits and flags fits in 6 bits
Debug.Assert(blobType < SerializedDataBlobKind.Limit);
Debug.Assert((byte)blobType <= 2 && flags <= 0x3F ||
(byte)blobType == 3 && flags <= 1 ||
(byte)blobType > 3 && flags <= 7);
byte encodedKindAndFlags;
if (blobType <= (SerializedDataBlobKind)3)
{
encodedKindAndFlags = (byte)((byte)blobType | (flags << 2));
}
else
{
encodedKindAndFlags = (byte)(3 | (((byte)blobType - 3) << 3) | (flags << 5));
}
encoder.WriteByte(encodedKindAndFlags);
}
