internal static BigInteger xor(BigInteger val, BigInteger that)
{
if (that.sign == 0)
{
return(val);
}
if (val.sign == 0)
{
return(that);
}
if (that.Equals(BigInteger.MINUS_ONE))
{
return(val.not());
}
if (val.Equals(BigInteger.MINUS_ONE))
{
return(that.not());
}
if (val.sign > 0)
{
if (that.sign > 0)
{
if (val.numberLength > that.numberLength)
{
return(xorPositive(val, that));
}
else
{
return(xorPositive(that, val));
}
}
else
{
return(xorDiffSigns(val, that));
}
}
else
{
if (that.sign > 0)
{
return(xorDiffSigns(that, val));
}
else if (that.getFirstNonzeroDigit() > val.getFirstNonzeroDigit())
{
return(xorNegative(that, val));
}
else
{
return(xorNegative(val, that));
}
}
}
internal static BigInteger andNot(BigInteger val, BigInteger that)
{
if (that.sign == 0)
{
return(val);
}
if (val.sign == 0)
{
return(BigInteger.ZERO);
}
if (val.Equals(BigInteger.MINUS_ONE))
{
return(that.not());
}
if (that.Equals(BigInteger.MINUS_ONE))
{
return(BigInteger.ZERO);
}
//if val == that, return 0
if (val.sign > 0)
{
if (that.sign > 0)
{
return(andNotPositive(val, that));
}
else
{
return(andNotPositiveNegative(val, that));
}
}
else
{
if (that.sign > 0)
{
return(andNotNegativePositive(val, that));
}
else
{
return(andNotNegative(val, that));
}
}
}
internal static BigInteger xor(BigInteger val, BigInteger that)
{
if (that.sign == 0) {
return val;
}
if (val.sign == 0) {
return that;
}
if (that.Equals(BigInteger.MINUS_ONE)) {
return val.not();
}
if (val.Equals(BigInteger.MINUS_ONE)) {
return that.not();
}
if (val.sign > 0) {
if (that.sign > 0) {
if (val.numberLength > that.numberLength) {
return xorPositive(val, that);
} else {
return xorPositive(that, val);
}
} else {
return xorDiffSigns(val, that);
}
} else {
if (that.sign > 0) {
return xorDiffSigns(that, val);
} else if (that.getFirstNonzeroDigit() > val.getFirstNonzeroDigit()) {
return xorNegative(that, val);
} else {
return xorNegative(val, that);
}
}
}
internal static BigInteger andNot(BigInteger val, BigInteger that)
{
if (that.sign == 0 ) {
return val;
}
if (val.sign == 0) {
return BigInteger.ZERO;
}
if (val.Equals(BigInteger.MINUS_ONE)) {
return that.not();
}
if (that.Equals(BigInteger.MINUS_ONE)){
return BigInteger.ZERO;
}
//if val == that, return 0
if (val.sign > 0) {
if (that.sign > 0) {
return andNotPositive(val, that);
} else {
return andNotPositiveNegative(val, that);
}
} else {
if (that.sign > 0) {
return andNotNegativePositive(val, that);
} else {
return andNotNegative(val, that);
}
}
}