Function sqrt [src]

r = ⌊√a⌋

Prototype

pub fn sqrt(rma: *Managed, a: *const Managed) !void

Parameters

rma: *Manageda: *const Managed

Source

  pub fn sqrt(rma: *Managed, a: *const Managed) !void {
    const bit_count = a.bitCountAbs();

    if (bit_count == 0) {
        try rma.set(0);
        rma.setMetadata(a.isPositive(), rma.len());
        return;
    }

    if (!a.isPositive()) {
        return error.SqrtOfNegativeNumber;
    }

    const needed_limbs = calcSqrtLimbsBufferLen(bit_count);
    const limbs_buffer = try rma.allocator.alloc(Limb, needed_limbs);
    defer rma.allocator.free(limbs_buffer);

    try rma.ensureCapacity((a.len() - 1) / 2 + 1);
    var m = rma.toMutable();
    m.sqrt(a.toConst(), limbs_buffer);
    rma.setMetadata(m.positive, m.len);
}  