@zxing/library
Version:
TypeScript port of ZXing multi-format 1D/2D barcode image processing library.
85 lines (84 loc) • 3.36 kB
JavaScript
;
/*
* Copyright 2012 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
// package com.google.zxing.pdf417.decoder.ec;
// import com.google.zxing.pdf417.PDF417Common;
var PDF417Common_1 = require("../../PDF417Common");
var ModulusPoly_1 = require("./ModulusPoly");
var IllegalArgumentException_1 = require("../../../IllegalArgumentException");
var ModulusBase_1 = require("./ModulusBase");
/**
* <p>A field based on powers of a generator integer, modulo some modulus.</p>
*
* @author Sean Owen
* @see com.google.zxing.common.reedsolomon.GenericGF
*/
var ModulusGF = /** @class */ (function (_super) {
__extends(ModulusGF, _super);
// private /*final*/ modulus: /*int*/ number;
function ModulusGF(modulus, generator) {
var _this = _super.call(this) || this;
_this.modulus = modulus;
_this.expTable = new Int32Array(modulus);
_this.logTable = new Int32Array(modulus);
var x = /*int*/ 1;
for (var i /*int*/ = 0; i < modulus; i++) {
_this.expTable[i] = x;
x = (x * generator) % modulus;
}
for (var i /*int*/ = 0; i < modulus - 1; i++) {
_this.logTable[_this.expTable[i]] = i;
}
// logTable[0] == 0 but this should never be used
_this.zero = new ModulusPoly_1.default(_this, new Int32Array([0]));
_this.one = new ModulusPoly_1.default(_this, new Int32Array([1]));
return _this;
}
ModulusGF.prototype.getZero = function () {
return this.zero;
};
ModulusGF.prototype.getOne = function () {
return this.one;
};
ModulusGF.prototype.buildMonomial = function (degree, coefficient) {
if (degree < 0) {
throw new IllegalArgumentException_1.default();
}
if (coefficient === 0) {
return this.zero;
}
var coefficients = new Int32Array(degree + 1);
coefficients[0] = coefficient;
return new ModulusPoly_1.default(this, coefficients);
};
ModulusGF.PDF417_GF = new ModulusGF(PDF417Common_1.default.NUMBER_OF_CODEWORDS, 3);
return ModulusGF;
}(ModulusBase_1.default));
exports.default = ModulusGF;