public dynamic GetValue(byte[] p)
{
var raw = GetRawValue(p);
if (raw == null)
{
return(null);
}
var cnv = ConversionFunction.Convert(raw);
return(cnv);
}
public unsafe dynamic GetRawValue(byte[] p)
{
switch (FieldType)
{
case PointType.F1234:
{
var v = (p[byte_offset] << 24) | (p[1 + byte_offset] << 16) | (p[2 + byte_offset] << 8) |
p[3 + byte_offset];
var fp = (float *)&v;
var f = *fp;
return(f);
}
case PointType.F12345678:
{
var v = ((ulong)p[0 + byte_offset] << 56) | ((ulong)p[1 + byte_offset] << 48) |
((ulong)p[2 + byte_offset] << 40) | ((ulong)p[3 + byte_offset] << 32) |
((ulong)p[4 + byte_offset] << 24) | ((ulong)p[5 + byte_offset] << 16) |
((ulong)p[6 + byte_offset] << 8) | (ulong)p[7 + byte_offset];
var dp = (double *)&v;
var d = *dp;
return(d);
}
case PointType.I1:
return((sbyte)p[byte_offset]);
case PointType.I12:
return((Int16)((p[byte_offset] << 8) | (p[byte_offset + 1])));
case PointType.I12b:
{
long temp = ((p[byte_offset] << 8) | (p[byte_offset + 1]));
temp = temp >> (15 - bit_stop);
var len = bit_stop - bit_start + 1;
var result = (_mask32[len] & temp);
var isNeg = (_bit32[len - 1] & result) != 0;
Int16 r = 0;
if (isNeg)
{
result = result - _bit32[len];
r = (Int16)result;
}
return(r);
}
case PointType.I1234:
return
((Int32)
((p[byte_offset] << 24) | (p[byte_offset + 1] << 16) | (p[byte_offset + 2] << 8) |
(p[byte_offset + 3])));
case PointType.I1234b:
{
long temp = ((p[byte_offset] << 24) | (p[byte_offset + 1] << 16) | (p[byte_offset + 2] << 8) |
(p[byte_offset + 3]));
temp = temp >> (31 - bit_stop);
var len = bit_stop - bit_start + 1;
var result = (_mask32[len] & temp);
var isNeg = (_bit32[len - 1] & result) != 0;
var r = 0;
if (isNeg)
{
result = result - _bit32[len];
r = (Int32)result;
}
return(r);
}
case PointType.S1:
{
int count = byte_size;
for (var i = 0; i < byte_size; i++)
{
if (p[i + byte_offset] == 0)
{
count = i;
break;
}
}
var s = Encoding.ASCII.GetString(p, byte_offset, count);
return(s);
}
case PointType.TIME40:
return
((UInt32)
((p[byte_offset] << 24) | (p[byte_offset + 1] << 16) | (p[byte_offset + 2] << 8) |
(p[byte_offset + 3])));
case PointType.TIME42:
return(((ulong)p[0 + byte_offset] << 40) | ((ulong)p[1 + byte_offset] << 32) |
((ulong)p[2 + byte_offset] << 24) | ((ulong)p[3 + byte_offset] << 16) |
((ulong)p[4 + byte_offset] << 8) | (ulong)p[5 + byte_offset]);
case PointType.TIME44:
return(((ulong)p[0 + byte_offset] << 56) | ((ulong)p[1 + byte_offset] << 48) |
((ulong)p[2 + byte_offset] << 40) | ((ulong)p[3 + byte_offset] << 32) |
((ulong)p[4 + byte_offset] << 24) | ((ulong)p[5 + byte_offset] << 16) |
((ulong)p[6 + byte_offset] << 8) | (ulong)p[7 + byte_offset]);
case PointType.U1:
return(p[byte_offset]);
case PointType.U1b:
{
int temp = p[byte_offset];
temp = temp >> (7 - bit_stop);
var len = bit_stop - bit_start + 1;
var result = (byte)(_mask32[len] & temp);
return(result);
}
case PointType.U12:
return((UInt16)((p[byte_offset] << 8) | (p[byte_offset + 1])));
case PointType.U12b:
{
var temp = ((p[byte_offset] << 8) | (p[byte_offset + 1]));
temp = temp >> (15 - bit_stop);
var len = bit_stop - bit_start + 1;
var result = (UInt16)(_mask32[len] & temp);
return(result);
}
case PointType.U1234:
return
((UInt32)
((p[byte_offset] << 24) | (p[byte_offset + 1] << 16) | (p[byte_offset + 2] << 8) |
(p[byte_offset + 3])));
case PointType.U12345678:
return
((UInt64)
(((ulong)p[byte_offset] << 56) | ((ulong)p[byte_offset + 1] << 48) | ((ulong)p[byte_offset + 2] << 40) | ((ulong)p[byte_offset + 3] << 32) |
((ulong)p[byte_offset + 4] << 24) | ((ulong)p[byte_offset + 5] << 16) | ((ulong)p[byte_offset + 6] << 8) |
((ulong)p[byte_offset + 7])));
// This isn't right because the value is big endian
//return (dynamic) BitConverter.ToUInt64(p, byte_offset);
case PointType.U1234b:
{
var temp = ((p[byte_offset] << 24) | (p[byte_offset + 1] << 16) | (p[byte_offset + 2] << 8) |
(p[byte_offset + 3]));
temp = temp >> (31 - bit_stop);
var len = bit_stop - bit_start + 1;
var result = (UInt32)(_mask32[len] & temp);
return(result);
}
case PointType.U21:
return((UInt16)((p[byte_offset + 1] << 8) | (p[byte_offset])));
case PointType.U4321:
return
((UInt32)
((p[byte_offset + 3] << 24) | (p[byte_offset + 2] << 16) | (p[byte_offset + 1] << 8) |
(p[byte_offset])));
case PointType.U4321b:
{
var temp = ((p[byte_offset + 3] << 24) | (p[byte_offset + 2] << 16) | (p[byte_offset + 1] << 8) |
(p[byte_offset]));
temp = temp >> (31 - bit_stop);
var len = bit_stop - bit_start + 1;
var result = (UInt32)(_mask32[len] & temp);
return(result);
}
case PointType.Pseudo:
return(ConversionFunction.Convert(0));
case PointType.FullPacketConversion:
return(ConversionFunction.Convert(p));
}
return(null);
}
