function bnpSubTo()

in public/amazon-cognito-identity.js [3714:3744]

• 31 lines of code
• 7 McCabe index (conditional complexity)

function bnpSubTo(a, r) {
	var i = 0,
	    c = 0,
	    m = Math.min(a.t, this.t);
	while (i < m) {
		c += this[i] - a[i];
		r[i++] = c & this.DM;
		c >>= this.DB;
	}
	if (a.t < this.t) {
		c -= a.s;
		while (i < this.t) {
			c += this[i];
			r[i++] = c & this.DM;
			c >>= this.DB;
		}
		c += this.s;
	} else {
		c += this.s;
		while (i < a.t) {
			c -= a[i];
			r[i++] = c & this.DM;
			c >>= this.DB;
		}
		c -= a.s;
	}
	r.s = c < 0 ? -1 : 0;
	if (c < -1) r[i++] = this.DV + c;else if (c > 0) r[i++] = c;
	r.t = i;
	r.clamp();
}