Fix GetSpanForCapacity.

microsoft · Mar 18, 2024 · ab16997 · ab16997
1 parent 11fea95
commit ab16997
Showing 1 changed file with 2 additions and 6 deletions.
diff --git a/src/cswinrt/strings/additions/Windows.Storage.Streams/WindowsRuntimeBufferExtensions.cs b/src/cswinrt/strings/additions/Windows.Storage.Streams/WindowsRuntimeBufferExtensions.cs
@@ -612,9 +612,6 @@ public override void WriteByte(byte value)
  }
  } // class WindowsRuntimeBufferUnmanagedMemoryStream
 
- // 905a0fef-bc53-11df-8c49-001e4fc686da
- private static readonly Guid IBufferByteAccess_IID = new Guid(new global::System.ReadOnlySpan<byte>(new byte[] { 0xEF, 0x0F, 0x5A, 0x90, 0x53, 0xBC, 0xDF, 0x11, 0x8C, 0x49, 0x00, 0x1E, 0x4F, 0xC6, 0x8, 0x6DA }));
-
  private static IntPtr GetPointerAtOffset(this IBuffer buffer, uint offset)
  {
  Debug.Assert(0 <= offset);
@@ -630,16 +627,15 @@ private static IntPtr GetPointerAtOffset(this IBuffer buffer, uint offset)
  private static Span<byte> GetSpanForCapacity(this IBuffer buffer, uint offset)
  {
  Debug.Assert(0 <= offset);
- Debug.Assert(offset < buffer.Length);
+ Debug.Assert(offset < buffer.Capacity);
 
  unsafe
  {
  IntPtr buffPtr = buffer.As<IBufferByteAccess>().Buffer;
- return new Span<byte>((byte*)buffPtr + offset, (int)buffer.Capacity);
+ return new Span<byte>((byte*)buffPtr + offset, (int)(buffer.Capacity - offset));
  }
  }
 
-
  private static unsafe void MemCopy(IntPtr src, IntPtr dst, uint count)
  {
  if (count > int.MaxValue)