public void WriteRepeated <T>(IReadOnlyCollection <T> values, RepeatedType <T> type)
{
// here we can check by one byte since wire type is mask and written in first byte
// acually we can quick check by BaseType and don't store first byte, but
// to support some strange non-packed primitive types...
if (ProtoRepeatedInfo <T> .IsPackedRepeatedField(_tagFirstByte))
{
// packed
// fixed type?
var fixedBaseSize = GetFixedBaseTypeSize(type.BaseType);
if (fixedBaseSize == 0)
{
// variable field..., use same hack as in WriteMessage
var current = _size;
var write = type.WriteElement;
var spot = MessageSizes.Reserve();
foreach (var value in values)
{
write(this, value);
}
var size = _size - current;
// remember message size, we will need it
_messageSizes.Set(spot, size);
_size += VarIntHelper.GetVarInt32Size((uint)size);
}
else
{
// we can calculate message size fast and easy, no need to cache
var size = fixedBaseSize * values.Count;
_size += VarIntHelper.GetVarInt32Size((uint)size) + size;
}
}
else
{
// don't cache non-packed sizes, they won't be asked
// all the tag sizes
_size += _lastTagSize * (values.Count - 1);
var fixedBaseSize = GetFixedBaseTypeSize(type.BaseType);
if (fixedBaseSize == 0)
{
var write = type.WriteElement;
// write last tag
foreach (var value in values)
{
write(this, value);
}
}
else
{
_size += fixedBaseSize * values.Count;
}
}
}
public void ReadRepeated <T>(AddRepeatedItem <T> addItem, RepeatedType <T> type,
PrepareForRepeatedItems prepareForRepeatedItems = null)
{
var read = type.ReadElement;
var tag = _lastTag;
if (ProtoRepeatedInfo <T> .IsPackedRepeatedField(tag))
{
// packed
// read repeated size
var totalSize = ReadByteSize();
if (totalSize <= 0)
{
return;
}
// try call prepare to add items
if (prepareForRepeatedItems != null)
{
var fixedSize = ProtoSizeCalc.GetFixedBaseTypeSize(type.BaseType);
if (fixedSize != 0)
{
var count = totalSize / fixedSize;
prepareForRepeatedItems(count);
}
}
// set length limit for this message
var captureLength = SetView(totalSize);
// end here will return view's end
while (!End)
{
addItem(read(this));
}
RestoreView(captureLength);
}
else
{
do
{
addItem(read(this));
} while (ReadTagIfEquals(tag));
}
}
public void WriteRepeated <T>(IReadOnlyCollection <T> values, RepeatedType <T> type)
{
var tagBytes = _lastTagBytes;
var tagStartPosition = CaptureCurrentPosition(tagBytes);
// here we can check by one byte since wire type is mask and written in first byte
if (ProtoRepeatedInfo <T> .IsPackedRepeatedField(Peek(tagStartPosition)))
{
// packed
var size = _sizeCalc.GetRepeatedSize(values, type);
WriteByteSize(size);
if (size == 0)
{
return;
}
// trust message, don't set length-limit view
var write = type.WriteElement;
foreach (var value in values)
{
write(this, value);
}
}
else
{
var write = type.WriteElement;
var left = values.Count;
foreach (var value in values)
{
write(this, value);
left--;
if (left == 0)
{
break;
}
// write last tag
WriteCopy(tagStartPosition, tagBytes);
}
}
}