public static ArraySegment <byte> GetSegment(ArraySegment <byte> originalBytes, int index, int nextIndex, int lastIndex, DirtyTracker tracker)
{
var offset = GetOffset(originalBytes, index, lastIndex, tracker);
if (offset == -1)
{
return(default(ArraySegment <byte>)); // note:very very dangerous.
}
int count;
if (nextIndex == -1 || nextIndex > lastIndex)
{
count = originalBytes.Offset + originalBytes.Count - offset; // last index
}
else
{
var nextOffset = ObjectSegmentHelper.GetOffset(originalBytes, nextIndex, lastIndex, tracker);
if (nextOffset == -1)
{
return(default(ArraySegment <byte>)); // note: precondition failed.
}
count = nextOffset - offset;
}
return(new ArraySegment <byte>(originalBytes.Array, offset, count));
}
public static T DeserializeSegment <T>(ArraySegment <byte> originalBytes, int index, int lastIndex, DirtyTracker tracker)
{
var offset = ObjectSegmentHelper.GetOffset(originalBytes, index, lastIndex, tracker);
if (offset == -1)
{
return(default(T));
}
int size;
var array = originalBytes.Array;
return(Formatter <T> .Default.Deserialize(ref array, offset, tracker, out size));
}
public static void SetFixedProperty <T>(ArraySegment <byte> bytes, int index, int lastIndex, byte[] extraBytes, T value, DirtyTracker tracker)
{
if (index <= lastIndex)
{
var array = bytes.Array;
Formatter <T> .Default.Serialize(ref array, ObjectSegmentHelper.GetOffset(bytes, index, lastIndex, tracker), value);
}
else
{
// from extraBytes
var offset = GetExtraBytesOffset(extraBytes, lastIndex, index);
Formatter <T> .Default.Serialize(ref extraBytes, offset, value);
}
}
public static T GetFixedProperty <T>(ArraySegment <byte> bytes, int index, int lastIndex, byte[] extraBytes, DirtyTracker tracker)
{
if (index <= lastIndex)
{
var array = bytes.Array;
int _;
return(Formatter <T> .Default.Deserialize(ref array, ObjectSegmentHelper.GetOffset(bytes, index, lastIndex, tracker), tracker, out _));
}
else
{
// from extraBytes
var offset = GetExtraBytesOffset(extraBytes, lastIndex, index);
int _;
return(Formatter <T> .Default.Deserialize(ref extraBytes, offset, tracker, out _));
}
}