public void EnumerateTagValuesEmpty()
{
Activity activity = new Activity("Test");
TagEnumerator state = default;
activity.EnumerateTags(ref state);
Assert.Equal(0, state.Count);
Assert.False(state.LastTag.HasValue);
}
public void EnumerateTagValuesAll()
{
Activity activity = new Activity("Test");
activity.SetTag("Tag1", "Value1");
activity.SetTag("Tag2", "Value2");
activity.SetTag("Tag3", "Value3");
TagEnumerator state = default;
activity.EnumerateTags(ref state);
Assert.Equal(3, state.Count);
Assert.True(state.LastTag.HasValue);
Assert.Equal("Tag3", state.LastTag?.Key);
Assert.Equal("Value3", state.LastTag?.Value);
}
private void WriteTag(Span <byte> tag, ref BitsBuffer tempBitsBuffer, SegmentHeader *tempHeader, int baseNumberOfBits)
{
if (tag.Length > byte.MaxValue)
{
ThrowInvalidTagLength();
}
var actualBitsBuffer = GetBitsBuffer();
int a = 136;
var r = actualBitsBuffer.ReadValue(ref a, 11);
var tagEnum = new TagEnumerator(actualBitsBuffer /* need to read the previous values */,
tempHeader->PreviousTagPosition);
if (tagEnum.TryGetPrevious(out var prevTag, out var previousIndex))
{
if (prevTag.SequenceEqual(tag))
{
tempBitsBuffer.AddValue(0, 1); // reuse previous buffer
return;
}
// go back a maximum of 8 tags, to avoid N**2 operations
// after 8 tags, we'll just write the tag again
for (int i = 0; i < 8; i++)
{
if (tagEnum.TryGetPrevious(out prevTag, out previousIndex) == false)
{
break;
}
if (prevTag.SequenceEqual(tag))
{
tempBitsBuffer.AddValue(1, 1);
tempBitsBuffer.AddValue((ulong)previousIndex, BitsForTagLen);
if (previousIndex != 0)
{
// re-arrange the previous pointer for the previous value
// to point to the current one
actualBitsBuffer.SetBits(
(previousIndex + 1 + tag.Length) * 8,
tempHeader->PreviousTagPosition,
BitsForTagLen
);
tempHeader->PreviousTagPosition = (ushort)previousIndex;
}
return;
}
}
}
tempBitsBuffer.AddValue(1, 1);
int currentBitPosition = baseNumberOfBits + tempBitsBuffer.NumberOfBits + BitsForTagLen;
int currentTagPosition = GetByteIndex(currentBitPosition);
var bitsToSkip = ToByteAlignment(currentBitPosition);
tempBitsBuffer.AddValue((ulong)currentTagPosition, BitsForTagLen);
tempBitsBuffer.Header->BitsPosition += (ushort)bitsToSkip;
tempBitsBuffer.AddValue((ulong)tag.Length, 8);
for (int i = 0; i < tag.Length; i++)
{
tempBitsBuffer.AddValue(tag[i], 8);
}
tempBitsBuffer.AddValue(tempHeader->PreviousTagPosition, BitsForTagLen);
tempHeader->PreviousTagPosition = (ushort)(currentTagPosition);
}
