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feature: NetworkWriter.WriteBytes(byte*) unsafe version to prepare for BitTree delta compression

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This commit is contained in:
vis2k 2022-10-18 16:31:08 +02:00
parent 243e142203
commit 9afc57bc78
2 changed files with 36 additions and 0 deletions
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20
Assets/Mirror/Core/NetworkWriter.cs
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@ -197,6 +197,26 @@ public void WriteBytes(byte[] array, int offset, int count)
Array.ConstrainedCopy(array, offset, this.buffer, Position, count);
Position += count;
}
// write an unsafe byte* array.
// useful for bit tree compression, etc.
public unsafe bool WriteBytes(byte* ptr, int offset, int size)
{
EnsureCapacity(Position + size);
fixed (byte* destination = &buffer[Position])
{
// write 'size' bytes at position
// 10 mio writes: 868ms
// Array.Copy(value.Array, value.Offset, buffer, Position, value.Count);
// 10 mio writes: 775ms
// Buffer.BlockCopy(value.Array, value.Offset, buffer, Position, value.Count);
// 10 mio writes: 637ms
UnsafeUtility.MemCpy(destination, ptr + offset, size);
}
Position += size;
return true;
}
/// <summary>Writes any type that mirror supports. Uses weaver populated Writer(T).write.</summary>
[MethodImpl(MethodImplOptions.AggressiveInlining)]

16
Assets/Mirror/Tests/Editor/NetworkWriterTest.cs
View File

@ -133,6 +133,22 @@ public void TestWritingBytesSegment()
Assert.That(deserialized.Array[deserialized.Offset + i], Is.EqualTo(data[i]));
}
[Test]
public unsafe void WriteBytes_Ptr()
{
NetworkWriter writer = new NetworkWriter();
// make sure this respects position & offset
writer.WriteByte(0xFF);
byte[] bytes = {0x01, 0x02, 0x03, 0x04};
fixed (byte* ptr = bytes)
{
Assert.True(writer.WriteBytes(ptr, 1, 2));
Assert.True(writer.ToArraySegment().SequenceEqual(new byte[] {0xFF, 0x02, 0x03}));
}
}
// write byte[], read segment
[Test]
public void TestWritingBytesAndReadingSegment()