public string ReadString(DataBufferMarker marker = default(DataBufferMarker))
{
var encoding = (UTF8Encoding)Encoding.UTF8;
if (!marker.Valid)
{
marker = CreateMarker(CurrReadIndex);
}
var strDataLength = ReadValue <int>(marker);
var strDataEnd = ReadValue <int>(marker.GetOffset(sizeof(int) * 1));
var strExpectedLength = ReadValue <int>(marker.GetOffset(sizeof(int) * 2));
var strDataStart = GetReadIndex(marker.GetOffset(sizeof(int) * 3));
if (strDataLength <= 0)
{
if (strDataLength < 0)
{
throw new Exception("No string found, maybe you are reading at the wrong location or you've done a bad write?");
}
return(string.Empty);
}
var str = encoding.GetString(DataPtr + strDataStart, Math.Min(strDataEnd - strDataStart, strDataLength));
CurrReadIndex = strDataEnd;
if (str.Length != strExpectedLength)
{
return(str.Substring(0, strExpectedLength));
}
return(str);
}
public ulong ReadDynInteger(DataBufferMarker marker = default(DataBufferMarker))
{
var byteCount = ReadValue <byte>();
if (byteCount == 0)
{
return(0);
}
if (byteCount == sizeof(byte))
{
return(ReadValue <byte>());
}
if (byteCount == sizeof(ushort))
{
return(ReadValue <ushort>());
}
if (byteCount == sizeof(uint))
{
return(ReadValue <uint>());
}
if (byteCount == sizeof(ulong))
{
return(ReadValue <ulong>());
}
throw new InvalidOperationException($"Expected byte count range: [{sizeof(byte)}..{sizeof(ulong)}], received: {byteCount}");
}
public int GetReadIndex(DataBufferMarker marker)
{
var readIndex = !marker.Valid ? CurrReadIndex : marker.Index;
if (readIndex >= Length)
{
throw new IndexOutOfRangeException("p1");
}
return(readIndex);
}
public Span <T> ReadSpan <T>(int size, DataBufferMarker marker = default)
where T : struct
{
size *= Unsafe.SizeOf <T>();
var readIndex = GetReadIndexAndSetNew(marker, size);
// Set it for later usage
CurrReadIndex = readIndex + size;
return(MemoryMarshal.Cast <byte, T>(Span.Slice(readIndex, size)));
}
public string ReadString(DataBufferMarker marker = default)
{
var length = ReadValue <int>();
if (length < 0)
{
throw new ArgumentOutOfRangeException(nameof(length));
}
return(new string(ReadSpan <char>(length)));
}
public T ReadValue <T>(DataBufferMarker marker = default(DataBufferMarker))
where T : struct
{
var val = default(T);
var size = Unsafe.SizeOf <T>();
var readIndex = GetReadIndexAndSetNew(marker, size);
// Set it for later usage
CurrReadIndex = readIndex + size;
// Read the value
ReadUnsafe((byte *)Unsafe.AsPointer(ref val), readIndex, size);
return(val);
}
public int GetReadIndexAndSetNew(DataBufferMarker marker, int size)
{
var readIndex = !marker.Valid ? CurrReadIndex : marker.Index;
if (readIndex >= Length)
{
throw new IndexOutOfRangeException($"p1 r={readIndex} >= l={Length}");
}
CurrReadIndex = readIndex + size;
if (CurrReadIndex > Length)
{
throw new IndexOutOfRangeException("p2");
}
return(readIndex);
}
public TCharBuffer ReadBuffer <TCharBuffer>(DataBufferMarker marker = default(DataBufferMarker))
where TCharBuffer : struct, ICharBuffer
{
var length = ReadValue <int>();
if (length < 0)
{
throw new ArgumentOutOfRangeException(nameof(length));
}
var buffer = new TCharBuffer {
Length = length
};
ReadDataSafe(buffer.Span.Slice(0, length));
return(buffer);
}
public int GetReadIndexAndSetNew(DataBufferMarker marker, int size)
{
if (size < 0)
{
throw new InvalidOperationException();
}
var readIndex = !marker.Valid ? CurrReadIndex : marker.Index;
if (readIndex >= Length)
{
throw new IndexOutOfRangeException($"p1 r={readIndex} >= l={Length}");
}
CurrReadIndex = readIndex + size;
if (CurrReadIndex > Length)
{
throw new IndexOutOfRangeException($"p2 {CurrReadIndex} ({readIndex} + {size}) > {Length}");
}
return(readIndex);
}
public T ReadValue <T>(DataBufferMarker marker = default(DataBufferMarker))
where T : struct
{
return(ReadSpan <T>(1, marker)[0]);
}
public void ReadDataSafe <T>(Span <T> span, DataBufferMarker marker = default)
where T : struct
{
ReadSpan <T>(span.Length).CopyTo(span);
}
