"use strict";
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/*
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* Copyright 2008 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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var __extends = (this && this.__extends) || (function () {
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var extendStatics = function (d, b) {
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extendStatics = Object.setPrototypeOf ||
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({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
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return extendStatics(d, b);
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};
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return function (d, b) {
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extendStatics(d, b);
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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})();
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Object.defineProperty(exports, "__esModule", { value: true });
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var OneDReader_1 = require("./OneDReader");
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var NotFoundException_1 = require("../NotFoundException");
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var FormatException_1 = require("../FormatException");
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/**
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* <p>Encapsulates functionality and implementation that is common to UPC and EAN families
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* of one-dimensional barcodes.</p>
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*
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* @author dswitkin@google.com (Daniel Switkin)
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* @author Sean Owen
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* @author alasdair@google.com (Alasdair Mackintosh)
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*/
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var AbstractUPCEANReader = /** @class */ (function (_super) {
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__extends(AbstractUPCEANReader, _super);
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function AbstractUPCEANReader() {
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var _this = _super !== null && _super.apply(this, arguments) || this;
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_this.decodeRowStringBuffer = '';
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return _this;
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}
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// private final UPCEANExtensionSupport extensionReader;
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// private final EANManufacturerOrgSupport eanManSupport;
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/*
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protected UPCEANReader() {
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decodeRowStringBuffer = new StringBuilder(20);
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extensionReader = new UPCEANExtensionSupport();
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eanManSupport = new EANManufacturerOrgSupport();
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}
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*/
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AbstractUPCEANReader.findStartGuardPattern = function (row) {
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var foundStart = false;
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var startRange;
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var nextStart = 0;
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var counters = Int32Array.from([0, 0, 0]);
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while (!foundStart) {
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counters = Int32Array.from([0, 0, 0]);
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startRange = AbstractUPCEANReader.findGuardPattern(row, nextStart, false, this.START_END_PATTERN, counters);
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var start = startRange[0];
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nextStart = startRange[1];
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var quietStart = start - (nextStart - start);
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if (quietStart >= 0) {
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foundStart = row.isRange(quietStart, start, false);
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}
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}
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return startRange;
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};
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AbstractUPCEANReader.checkChecksum = function (s) {
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return AbstractUPCEANReader.checkStandardUPCEANChecksum(s);
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};
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AbstractUPCEANReader.checkStandardUPCEANChecksum = function (s) {
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var length = s.length;
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if (length === 0)
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return false;
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var check = parseInt(s.charAt(length - 1), 10);
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return AbstractUPCEANReader.getStandardUPCEANChecksum(s.substring(0, length - 1)) === check;
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};
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AbstractUPCEANReader.getStandardUPCEANChecksum = function (s) {
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var length = s.length;
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var sum = 0;
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for (var i = length - 1; i >= 0; i -= 2) {
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var digit = s.charAt(i).charCodeAt(0) - '0'.charCodeAt(0);
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if (digit < 0 || digit > 9) {
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throw new FormatException_1.default();
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}
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sum += digit;
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}
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sum *= 3;
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for (var i = length - 2; i >= 0; i -= 2) {
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var digit = s.charAt(i).charCodeAt(0) - '0'.charCodeAt(0);
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if (digit < 0 || digit > 9) {
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throw new FormatException_1.default();
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}
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sum += digit;
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}
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return (1000 - sum) % 10;
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};
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AbstractUPCEANReader.decodeEnd = function (row, endStart) {
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return AbstractUPCEANReader.findGuardPattern(row, endStart, false, AbstractUPCEANReader.START_END_PATTERN, new Int32Array(AbstractUPCEANReader.START_END_PATTERN.length).fill(0));
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};
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/**
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* @throws NotFoundException
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*/
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AbstractUPCEANReader.findGuardPatternWithoutCounters = function (row, rowOffset, whiteFirst, pattern) {
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return this.findGuardPattern(row, rowOffset, whiteFirst, pattern, new Int32Array(pattern.length));
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};
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/**
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* @param row row of black/white values to search
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* @param rowOffset position to start search
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* @param whiteFirst if true, indicates that the pattern specifies white/black/white/...
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* pixel counts, otherwise, it is interpreted as black/white/black/...
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* @param pattern pattern of counts of number of black and white pixels that are being
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* searched for as a pattern
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* @param counters array of counters, as long as pattern, to re-use
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* @return start/end horizontal offset of guard pattern, as an array of two ints
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* @throws NotFoundException if pattern is not found
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*/
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AbstractUPCEANReader.findGuardPattern = function (row, rowOffset, whiteFirst, pattern, counters) {
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var width = row.getSize();
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rowOffset = whiteFirst ? row.getNextUnset(rowOffset) : row.getNextSet(rowOffset);
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var counterPosition = 0;
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var patternStart = rowOffset;
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var patternLength = pattern.length;
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var isWhite = whiteFirst;
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for (var x = rowOffset; x < width; x++) {
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if (row.get(x) !== isWhite) {
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counters[counterPosition]++;
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}
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else {
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if (counterPosition === patternLength - 1) {
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if (OneDReader_1.default.patternMatchVariance(counters, pattern, AbstractUPCEANReader.MAX_INDIVIDUAL_VARIANCE) < AbstractUPCEANReader.MAX_AVG_VARIANCE) {
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return Int32Array.from([patternStart, x]);
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}
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patternStart += counters[0] + counters[1];
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var slice = counters.slice(2, counters.length);
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for (var i = 0; i < counterPosition - 1; i++) {
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counters[i] = slice[i];
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}
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counters[counterPosition - 1] = 0;
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counters[counterPosition] = 0;
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counterPosition--;
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}
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else {
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counterPosition++;
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}
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counters[counterPosition] = 1;
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isWhite = !isWhite;
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}
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}
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throw new NotFoundException_1.default();
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};
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AbstractUPCEANReader.decodeDigit = function (row, counters, rowOffset, patterns) {
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this.recordPattern(row, rowOffset, counters);
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var bestVariance = this.MAX_AVG_VARIANCE;
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var bestMatch = -1;
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var max = patterns.length;
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for (var i = 0; i < max; i++) {
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var pattern = patterns[i];
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var variance = OneDReader_1.default.patternMatchVariance(counters, pattern, AbstractUPCEANReader.MAX_INDIVIDUAL_VARIANCE);
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if (variance < bestVariance) {
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bestVariance = variance;
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bestMatch = i;
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}
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}
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if (bestMatch >= 0) {
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return bestMatch;
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}
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else {
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throw new NotFoundException_1.default();
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}
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};
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// These two values are critical for determining how permissive the decoding will be.
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// We've arrived at these values through a lot of trial and error. Setting them any higher
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// lets false positives creep in quickly.
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AbstractUPCEANReader.MAX_AVG_VARIANCE = 0.48;
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AbstractUPCEANReader.MAX_INDIVIDUAL_VARIANCE = 0.7;
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/**
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* Start/end guard pattern.
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*/
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AbstractUPCEANReader.START_END_PATTERN = Int32Array.from([1, 1, 1]);
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/**
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* Pattern marking the middle of a UPC/EAN pattern, separating the two halves.
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*/
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AbstractUPCEANReader.MIDDLE_PATTERN = Int32Array.from([1, 1, 1, 1, 1]);
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/**
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* end guard pattern.
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*/
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AbstractUPCEANReader.END_PATTERN = Int32Array.from([1, 1, 1, 1, 1, 1]);
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/**
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* "Odd", or "L" patterns used to encode UPC/EAN digits.
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*/
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AbstractUPCEANReader.L_PATTERNS = [
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Int32Array.from([3, 2, 1, 1]),
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Int32Array.from([2, 2, 2, 1]),
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Int32Array.from([2, 1, 2, 2]),
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Int32Array.from([1, 4, 1, 1]),
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Int32Array.from([1, 1, 3, 2]),
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Int32Array.from([1, 2, 3, 1]),
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Int32Array.from([1, 1, 1, 4]),
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Int32Array.from([1, 3, 1, 2]),
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Int32Array.from([1, 2, 1, 3]),
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Int32Array.from([3, 1, 1, 2]),
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];
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return AbstractUPCEANReader;
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}(OneDReader_1.default));
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exports.default = AbstractUPCEANReader;
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