public void AddEntriesFrom(ref ParseContext ctx, FieldCodec <T> codec)
{
// TODO: Inline some of the Add code, so we can avoid checking the size on every
// iteration.
uint tag = ctx.state.lastTag;
var reader = codec.ValueReader;
// Non-nullable value types can be packed or not.
if (FieldCodec <T> .IsPackedRepeatedField(tag))
{
int length = ctx.ReadLength();
if (length > 0)
{
int oldLimit = SegmentedBufferHelper.PushLimit(ref ctx.state, length);
while (!SegmentedBufferHelper.IsReachedLimit(ref ctx.state))
{
Add(reader(ref ctx));
}
SegmentedBufferHelper.PopLimit(ref ctx.state, oldLimit);
}
// Empty packed field. Odd, but valid - just ignore.
}
else
{
// Not packed... (possibly not packable)
do
{
Add(reader(ref ctx));
} while (ParsingPrimitives.MaybeConsumeTag(ref ctx.buffer, ref ctx.state, tag));
}
}
public void AddEntriesFrom(ref ParseContext ctx, FieldCodec <T> codec)
{
// TODO: Inline some of the Add code, so we can avoid checking the size on every
// iteration.
uint tag = ctx.state.lastTag;
var reader = codec.ValueReader;
// Non-nullable value types can be packed or not.
if (FieldCodec <T> .IsPackedRepeatedField(tag))
{
int length = ctx.ReadLength();
if (length > 0)
{
int oldLimit = SegmentedBufferHelper.PushLimit(ref ctx.state, length);
// If the content is fixed size then we can calculate the length
// of the repeated field and pre-initialize the underlying collection.
//
// Check that the supplied length doesn't exceed the underlying buffer.
// That prevents a malicious length from initializing a very large collection.
if (codec.FixedSize > 0 && length % codec.FixedSize == 0 && ParsingPrimitives.IsDataAvailable(ref ctx.state, length))
{
EnsureSize(count + (length / codec.FixedSize));
while (!SegmentedBufferHelper.IsReachedLimit(ref ctx.state))
{
// Only FieldCodecs with a fixed size can reach here, and they are all known
// types that don't allow the user to specify a custom reader action.
// reader action will never return null.
array[count++] = reader(ref ctx);
}
}
else
{
// Content is variable size so add until we reach the limit.
while (!SegmentedBufferHelper.IsReachedLimit(ref ctx.state))
{
Add(reader(ref ctx));
}
}
SegmentedBufferHelper.PopLimit(ref ctx.state, oldLimit);
}
// Empty packed field. Odd, but valid - just ignore.
}
else
{
// Not packed... (possibly not packable)
do
{
Add(reader(ref ctx));
} while (ParsingPrimitives.MaybeConsumeTag(ref ctx.buffer, ref ctx.state, tag));
}
}