/* this*=c mod Modulus, where c is a small int */
public void IMul(int c)
{
// norm();
bool s = false;
if (c < 0)
{
c = -c;
s = true;
}
if (MODTYPE == PSEUDO_MERSENNE || MODTYPE == GENERALISED_MERSENNE)
{
DBIG d = x.PXMul(c);
x.Copy(Mod(d));
XES = 2;
}
else
{
if (XES * c <= FEXCESS)
{
x.PMul(c);
XES *= c;
}
else
{ // this is not good
FP n = new FP(c);
Mul(n);
}
}
/*
* if (c<=BIG.NEXCESS && XES*c<=FEXCESS)
* {
* x.imul(c);
* XES*=c;
* x.norm();
* }
* else
* {
* DBIG d=x.pxmul(c);
* x.copy(mod(d));
* XES=2;
* }
*/
if (s)
{
Neg();
Norm();
}
}