@zxing/library/es2015/core/pdf417/decoder/ec/ModulusBase.js

TypeScript port of ZXing multi-format 1D/2D barcode image processing library.

import IllegalArgumentException from '../../../IllegalArgumentException';
import ArithmeticException from '../../../ArithmeticException';
export default class ModulusBase {
    add(a, b) {
        return (a + b) % this.modulus;
    }
    subtract(a, b) {
        return (this.modulus + a - b) % this.modulus;
    }
    exp(a) {
        return this.expTable[a];
    }
    log(a) {
        if (a === 0) {
            throw new IllegalArgumentException();
        }
        return this.logTable[a];
    }
    inverse(a) {
        if (a === 0) {
            throw new ArithmeticException();
        }
        return this.expTable[this.modulus - this.logTable[a] - 1];
    }
    multiply(a, b) {
        if (a === 0 || b === 0) {
            return 0;
        }
        return this.expTable[(this.logTable[a] + this.logTable[b]) % (this.modulus - 1)];
    }
    getSize() {
        return this.modulus;
    }
    equals(o) {
        return o === this;
    }
}