protected SECSItem(byte[] data, int itemOffset)
{
int incomingDataLength = 0;
if (data.Length == 0)
{
formatCode = SECSItemFormatCode.HeaderOnly;
inboundNumberOfLengthBytes = 0;
data = null;
return;
}
formatCode = SECSItemFormatCodeFunctions.getSECSItemFormatCodeFromNumber((byte)((data[itemOffset] >> 2) & 0x0000003F));
inboundNumberOfLengthBytes = (data[itemOffset] & 0x03);
byte[] temp1 = new byte[4];
switch (inboundNumberOfLengthBytes)
{
case 1:
{
temp1[0] = 0;
temp1[1] = 0;
temp1[2] = 0;
temp1[3] = data[itemOffset + 1];
break;
}
case 2:
{
temp1[0] = 0;
temp1[1] = 0;
temp1[2] = data[itemOffset + 1];
temp1[3] = data[itemOffset + 2];
break;
}
case 3:
{
temp1[0] = 0;
temp1[1] = data[itemOffset + 1];
temp1[2] = data[itemOffset + 2];
temp1[3] = data[itemOffset + 3];
break;
}
}
if (BitConverter.IsLittleEndian)
{
Array.Reverse(temp1);
}
incomingDataLength = BitConverter.ToInt32(temp1, 0);
if (formatCode == SECSItemFormatCode.L)
{
numberOfElements = incomingDataLength;
}
else
{
lengthInBytes = incomingDataLength;
}
}
public static SECSItem generateSECSItem(byte[] data, int offset)
{
SECSItem result = null;
SECSItemFormatCode formatCode = SECSItemFormatCodeFunctions.getSECSItemFormatCodeFromNumber((byte)((data[offset] >> 2) & 0x0000003F));
int numberOfLengthBytes = (data[offset] & 0x03);
int incomingDataLength = 0;
switch (numberOfLengthBytes)
{
case 1:
{
byte[] temp = new byte[4];
temp[0] = 0;
temp[1] = 0;
temp[2] = 0;
temp[3] = data[offset + 1];
if (BitConverter.IsLittleEndian)
{
Array.Reverse(temp);
}
incomingDataLength = BitConverter.ToInt32(temp, 0);
break;
}
case 2:
{
byte[] temp = new byte[4];
temp[0] = 0;
temp[1] = 0;
temp[2] = data[offset + 1];
temp[3] = data[offset + 2];
if (BitConverter.IsLittleEndian)
{
Array.Reverse(temp);
}
incomingDataLength = BitConverter.ToInt32(temp, 0);
break;
}
case 3:
{
byte[] temp = new byte[4];
temp[0] = 0;
temp[1] = data[offset + 1];
temp[2] = data[offset + 2];
temp[3] = data[offset + 3];
if (BitConverter.IsLittleEndian)
{
Array.Reverse(temp);
}
incomingDataLength = BitConverter.ToInt32(temp, 0);
break;
}
}
switch (formatCode)
{
case SECSItemFormatCode.L:
result = new ListSECSItem(data, offset);
break;
case SECSItemFormatCode.B:
result = new BinarySECSItem(data, offset, 0); // Remember to use the proper constructor for this case
break;
case SECSItemFormatCode.BO:
if (incomingDataLength == 1)
{
result = new BooleanSECSItem(data, offset);
}
else
{
result = new BooleanArraySECSItem(data, offset);
}
break;
case SECSItemFormatCode.A:
result = new ASCIISECSItem(data, offset);
break;
case SECSItemFormatCode.J8:
break;
case SECSItemFormatCode.C2:
break;
case SECSItemFormatCode.I8:
if (incomingDataLength == 8)
{
result = new I8SECSItem(data, offset);
}
else
{
result = new I8ArraySECSItem(data, offset);
}
break;
case SECSItemFormatCode.I1:
if (incomingDataLength == 1)
{
result = new I1SECSItem(data, offset);
}
else
{
result = new I1ArraySECSItem(data, offset, 0); // Need to use this version because of method signature issues
}
break;
case SECSItemFormatCode.I2:
if (incomingDataLength == 2)
{
result = new I2SECSItem(data, offset);
}
else
{
result = new I2ArraySECSItem(data, offset);
}
break;
case SECSItemFormatCode.I4:
if (incomingDataLength == 4)
{
result = new I4SECSItem(data, offset);
}
else
{
result = new I4ArraySECSItem(data, offset);
}
break;
case SECSItemFormatCode.F8:
if (incomingDataLength == 8)
{
result = new F8SECSItem(data, offset);
}
else
{
result = new F8ArraySECSItem(data, offset);
}
break;
case SECSItemFormatCode.F4:
if (incomingDataLength == 4)
{
result = new F4SECSItem(data, offset);
}
else
{
result = new F4ArraySECSItem(data, offset);
}
break;
case SECSItemFormatCode.U8:
if (incomingDataLength == 8)
{
result = new U8SECSItem(data, offset);
}
else
{
result = new U8ArraySECSItem(data, offset);
}
break;
case SECSItemFormatCode.U1:
if (incomingDataLength == 1)
{
result = new U1SECSItem(data, offset);
}
else
{
result = new U1ArraySECSItem(data, offset, 0); // Remember to use the proper constructor for this case
}
break;
case SECSItemFormatCode.U2:
if (incomingDataLength == 2)
{
result = new U2SECSItem(data, offset);
}
else
{
result = new U2ArraySECSItem(data, offset);
}
break;
case SECSItemFormatCode.U4:
if (incomingDataLength == 4)
{
result = new U4SECSItem(data, offset);
}
else
{
result = new U4ArraySECSItem(data, offset);
}
break;
case SECSItemFormatCode.UNDEFINED:
break;
case SECSItemFormatCode.HeaderOnly:
break;
default:
break;
}
return(result);
}