private void WriteDecimal(decimal value, TdsParserStateObject stateObj)
{
stateObj._decimalBits = Decimal.GetBits(value);
Debug.Assert(null != stateObj._decimalBits, "decimalBits should be filled in at TdsExecuteRPC time");
/*
Returns a binary representation of a Decimal. The return value is an integer
array with four elements. Elements 0, 1, and 2 contain the low, middle, and
high 32 bits of the 96-bit integer part of the Decimal. Element 3 contains
the scale factor and sign of the Decimal: bits 0-15 (the lower word) are
unused; bits 16-23 contain a value between 0 and 28, indicating the power of
10 to divide the 96-bit integer part by to produce the Decimal value; bits 24-
30 are unused; and finally bit 31 indicates the sign of the Decimal value, 0
meaning positive and 1 meaning negative.
SQLDECIMAL/SQLNUMERIC has a byte stream of:
struct {
BYTE sign; // 1 if positive, 0 if negative
BYTE data[];
}
For TDS 7.0 and above, there are always 17 bytes of data
*/
// write the sign (note that COM and SQL are opposite)
if (0x80000000 == (stateObj._decimalBits[3] & 0x80000000))
stateObj.WriteByte(0);
else
stateObj.WriteByte(1);
WriteInt(stateObj._decimalBits[0], stateObj);
WriteInt(stateObj._decimalBits[1], stateObj);
WriteInt(stateObj._decimalBits[2], stateObj);
WriteInt(0, stateObj);
}
