/// <summary>
/// Like <see cref="MergeFrom(ICodedInputStream, ExtensionRegistry, IBuilder)" />
/// but parses a single field.
/// </summary>
/// <param name="input">The input to read the field from</param>
/// <param name="extensionRegistry">Registry to use when an extension field is encountered</param>
/// <param name="builder">Builder to merge field into, if it's a known field</param>
/// <param name="tag">The tag, which should already have been read from the input</param>
/// <returns>true unless the tag is an end-group tag</returns>
internal bool MergeFieldFrom(ICodedInputStream input,
ExtensionRegistry extensionRegistry, IBuilder builder, uint tag,
string fieldName)
{
if (tag == 0 && fieldName != null)
{
FieldDescriptor fieldByName = builder.DescriptorForType.FindFieldByName(fieldName);
if (fieldByName != null)
{
tag = WireFormat.MakeTag(fieldByName);
}
else
{
ExtensionInfo extension = extensionRegistry.FindByName(builder.DescriptorForType, fieldName);
if (extension != null)
{
tag = WireFormat.MakeTag(extension.Descriptor);
}
}
}
MessageDescriptor type = builder.DescriptorForType;
if (type.Options.MessageSetWireFormat && tag == WireFormat.MessageSetTag.ItemStart)
{
MergeMessageSetExtensionFromCodedStream(input, extensionRegistry, builder);
return(true);
}
WireFormat.WireType wireType = WireFormat.GetTagWireType(tag);
int fieldNumber = WireFormat.GetTagFieldNumber(tag);
FieldDescriptor field;
IMessageLite defaultFieldInstance = null;
if (type.IsExtensionNumber(fieldNumber))
{
ExtensionInfo extension = extensionRegistry[type, fieldNumber];
if (extension == null)
{
field = null;
}
else
{
field = extension.Descriptor;
defaultFieldInstance = extension.DefaultInstance;
}
}
else
{
field = type.FindFieldByNumber(fieldNumber);
}
// Unknown field or wrong wire type. Skip.
if (field == null)
{
return(MergeFieldFrom(tag, input));
}
if (wireType != WireFormat.GetWireType(field))
{
WireFormat.WireType expectedType = WireFormat.GetWireType(field.FieldType);
if (wireType == expectedType)
{
//Allowed as of 2.3, this is unpacked data for a packed array
}
else if (field.IsRepeated && wireType == WireFormat.WireType.LengthDelimited &&
(expectedType == WireFormat.WireType.Varint || expectedType == WireFormat.WireType.Fixed32 ||
expectedType == WireFormat.WireType.Fixed64))
{
//Allowed as of 2.3, this is packed data for an unpacked array
}
else
{
return(MergeFieldFrom(tag, input));
}
}
switch (field.FieldType)
{
case FieldType.Group:
case FieldType.Message:
{
IBuilderLite subBuilder = (defaultFieldInstance != null)
? defaultFieldInstance.WeakCreateBuilderForType()
: builder.CreateBuilderForField(field);
if (!field.IsRepeated)
{
subBuilder.WeakMergeFrom((IMessageLite)builder[field]);
if (field.FieldType == FieldType.Group)
{
input.ReadGroup(field.FieldNumber, subBuilder, extensionRegistry);
}
else
{
input.ReadMessage(subBuilder, extensionRegistry);
}
builder[field] = subBuilder.WeakBuild();
}
else
{
List <IMessageLite> list = new List <IMessageLite>();
if (field.FieldType == FieldType.Group)
{
input.ReadGroupArray(tag, fieldName, list, subBuilder.WeakDefaultInstanceForType,
extensionRegistry);
}
else
{
input.ReadMessageArray(tag, fieldName, list, subBuilder.WeakDefaultInstanceForType,
extensionRegistry);
}
foreach (IMessageLite m in list)
{
builder.WeakAddRepeatedField(field, m);
}
return(true);
}
break;
}
case FieldType.Enum:
{
if (!field.IsRepeated)
{
object unknown;
IEnumLite value = null;
if (input.ReadEnum(ref value, out unknown, field.EnumType))
{
builder[field] = value;
}
else if (unknown is int)
{
MergeVarintField(fieldNumber, (ulong)(int)unknown);
}
}
else
{
ICollection <object> unknown;
List <IEnumLite> list = new List <IEnumLite>();
input.ReadEnumArray(tag, fieldName, list, out unknown, field.EnumType);
foreach (IEnumLite en in list)
{
builder.WeakAddRepeatedField(field, en);
}
if (unknown != null)
{
foreach (object oval in unknown)
{
if (oval is int)
{
MergeVarintField(fieldNumber, (ulong)(int)oval);
}
}
}
}
break;
}
default:
{
if (!field.IsRepeated)
{
object value = null;
if (input.ReadPrimitiveField(field.FieldType, ref value))
{
builder[field] = value;
}
}
else
{
List <object> list = new List <object>();
input.ReadPrimitiveArray(field.FieldType, tag, fieldName, list);
foreach (object oval in list)
{
builder.WeakAddRepeatedField(field, oval);
}
}
break;
}
}
return(true);
}
/// <summary>
/// Like <see cref="MergeFrom(CodedInputStream, ExtensionRegistry, IBuilder)" />
/// but parses a single field.
/// </summary>
/// <param name="input">The input to read the field from</param>
/// <param name="extensionRegistry">Registry to use when an extension field is encountered</param>
/// <param name="builder">Builder to merge field into, if it's a known field</param>
/// <param name="tag">The tag, which should already have been read from the input</param>
/// <returns>true unless the tag is an end-group tag</returns>
internal bool MergeFieldFrom(CodedInputStream input,
ExtensionRegistry extensionRegistry, IBuilder builder, uint tag)
{
MessageDescriptor type = builder.DescriptorForType;
if (type.Options.MessageSetWireFormat && tag == WireFormat.MessageSetTag.ItemStart)
{
MergeMessageSetExtensionFromCodedStream(input, extensionRegistry, builder);
return(true);
}
WireFormat.WireType wireType = WireFormat.GetTagWireType(tag);
int fieldNumber = WireFormat.GetTagFieldNumber(tag);
FieldDescriptor field;
IMessage defaultFieldInstance = null;
if (type.IsExtensionNumber(fieldNumber))
{
ExtensionInfo extension = extensionRegistry[type, fieldNumber];
if (extension == null)
{
field = null;
}
else
{
field = extension.Descriptor;
defaultFieldInstance = extension.DefaultInstance;
}
}
else
{
field = type.FindFieldByNumber(fieldNumber);
}
// Unknown field or wrong wire type. Skip.
if (field == null || wireType != WireFormat.GetWireType(field))
{
return(MergeFieldFrom(tag, input));
}
if (field.IsPacked)
{
int length = (int)input.ReadRawVarint32();
int limit = input.PushLimit(length);
if (field.FieldType == FieldType.Enum)
{
while (!input.ReachedLimit)
{
int rawValue = input.ReadEnum();
object value = field.EnumType.FindValueByNumber(rawValue);
if (value == null)
{
// If the number isn't recognized as a valid value for this
// enum, drop it (don't even add it to unknownFields).
return(true);
}
builder.WeakAddRepeatedField(field, value);
}
}
else
{
while (!input.ReachedLimit)
{
Object value = input.ReadPrimitiveField(field.FieldType);
builder.WeakAddRepeatedField(field, value);
}
}
input.PopLimit(limit);
}
else
{
object value;
switch (field.FieldType)
{
case FieldType.Group:
case FieldType.Message: {
IBuilder subBuilder;
if (defaultFieldInstance != null)
{
subBuilder = defaultFieldInstance.WeakCreateBuilderForType();
}
else
{
subBuilder = builder.CreateBuilderForField(field);
}
if (!field.IsRepeated)
{
subBuilder.WeakMergeFrom((IMessage)builder[field]);
}
if (field.FieldType == FieldType.Group)
{
input.ReadGroup(field.FieldNumber, subBuilder, extensionRegistry);
}
else
{
input.ReadMessage(subBuilder, extensionRegistry);
}
value = subBuilder.WeakBuild();
break;
}
case FieldType.Enum: {
int rawValue = input.ReadEnum();
value = field.EnumType.FindValueByNumber(rawValue);
// If the number isn't recognized as a valid value for this enum,
// drop it.
if (value == null)
{
MergeVarintField(fieldNumber, (ulong)rawValue);
return(true);
}
break;
}
default:
value = input.ReadPrimitiveField(field.FieldType);
break;
}
if (field.IsRepeated)
{
builder.WeakAddRepeatedField(field, value);
}
else
{
builder[field] = value;
}
}
return(true);
}
