Function shiftRight [src]

r = a >> shift r and a may alias.

Prototype

pub fn shiftRight(r: *Managed, a: *const Managed, shift: usize) !void

Parameters

r: *Manageda: *const Managedshift: usize

Source

  pub fn shiftRight(r: *Managed, a: *const Managed, shift: usize) !void {
    if (a.len() <= shift / limb_bits) {
        // Shifting negative numbers converges to -1 instead of 0
        if (a.isPositive()) {
            r.metadata = 1;
            r.limbs[0] = 0;
        } else {
            r.metadata = 1;
            r.setSign(false);
            r.limbs[0] = 1;
        }
        return;
    }

    try r.ensureCapacity(a.len() - (shift / limb_bits));
    var m = r.toMutable();
    m.shiftRight(a.toConst(), shift);
    r.setMetadata(m.positive, m.len);
}  