"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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/*namespace com.google.zxing.oned {*/
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var BarcodeFormat_1 = require("../BarcodeFormat");
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var ChecksumException_1 = require("../ChecksumException");
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var DecodeHintType_1 = require("../DecodeHintType");
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var FormatException_1 = require("../FormatException");
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var NotFoundException_1 = require("../NotFoundException");
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// import Reader from '../Reader';
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var Result_1 = require("../Result");
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// import ResultMetadataType from '../ResultMetadataType';
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var ResultPoint_1 = require("../ResultPoint");
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var OneDReader_1 = require("./OneDReader");
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/**
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* <p>Decodes Code 128 barcodes.</p>
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*
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* @author Sean Owen
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*/
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var Code128Reader = /** @class */ (function (_super) {
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__extends(Code128Reader, _super);
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function Code128Reader() {
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return _super !== null && _super.apply(this, arguments) || this;
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}
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Code128Reader.findStartPattern = function (row) {
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var width = row.getSize();
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var rowOffset = row.getNextSet(0);
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var counterPosition = 0;
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var counters = Int32Array.from([0, 0, 0, 0, 0, 0]);
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var patternStart = rowOffset;
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var isWhite = false;
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var patternLength = 6;
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for (var i = rowOffset; i < width; i++) {
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if (row.get(i) !== 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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var bestVariance = Code128Reader.MAX_AVG_VARIANCE;
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var bestMatch = -1;
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for (var startCode = Code128Reader.CODE_START_A; startCode <= Code128Reader.CODE_START_C; startCode++) {
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var variance = OneDReader_1.default.patternMatchVariance(counters, Code128Reader.CODE_PATTERNS[startCode], Code128Reader.MAX_INDIVIDUAL_VARIANCE);
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if (variance < bestVariance) {
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bestVariance = variance;
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bestMatch = startCode;
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}
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}
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// Look for whitespace before start pattern, >= 50% of width of start pattern
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if (bestMatch >= 0 &&
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row.isRange(Math.max(0, patternStart - (i - patternStart) / 2), patternStart, false)) {
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return Int32Array.from([patternStart, i, bestMatch]);
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}
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patternStart += counters[0] + counters[1];
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counters = counters.slice(2, counters.length);
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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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Code128Reader.decodeCode = function (row, counters, rowOffset) {
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OneDReader_1.default.recordPattern(row, rowOffset, counters);
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var bestVariance = Code128Reader.MAX_AVG_VARIANCE; // worst variance we'll accept
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var bestMatch = -1;
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for (var d = 0; d < Code128Reader.CODE_PATTERNS.length; d++) {
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var pattern = Code128Reader.CODE_PATTERNS[d];
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var variance = this.patternMatchVariance(counters, pattern, Code128Reader.MAX_INDIVIDUAL_VARIANCE);
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if (variance < bestVariance) {
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bestVariance = variance;
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bestMatch = d;
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}
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}
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// TODO We're overlooking the fact that the STOP pattern has 7 values, not 6.
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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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Code128Reader.prototype.decodeRow = function (rowNumber, row, hints) {
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var convertFNC1 = hints && (hints.get(DecodeHintType_1.default.ASSUME_GS1) === true);
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var startPatternInfo = Code128Reader.findStartPattern(row);
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var startCode = startPatternInfo[2];
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var currentRawCodesIndex = 0;
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var rawCodes = new Uint8Array(20);
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rawCodes[currentRawCodesIndex++] = startCode;
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var codeSet;
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switch (startCode) {
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case Code128Reader.CODE_START_A:
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codeSet = Code128Reader.CODE_CODE_A;
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break;
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case Code128Reader.CODE_START_B:
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codeSet = Code128Reader.CODE_CODE_B;
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break;
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case Code128Reader.CODE_START_C:
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codeSet = Code128Reader.CODE_CODE_C;
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break;
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default:
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throw new FormatException_1.default();
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}
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var done = false;
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var isNextShifted = false;
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var result = '';
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var lastStart = startPatternInfo[0];
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var nextStart = startPatternInfo[1];
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var counters = Int32Array.from([0, 0, 0, 0, 0, 0]);
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var lastCode = 0;
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var code = 0;
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var checksumTotal = startCode;
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var multiplier = 0;
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var lastCharacterWasPrintable = true;
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var upperMode = false;
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var shiftUpperMode = false;
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while (!done) {
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var unshift = isNextShifted;
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isNextShifted = false;
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// Save off last code
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lastCode = code;
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// Decode another code from image
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code = Code128Reader.decodeCode(row, counters, nextStart);
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rawCodes[currentRawCodesIndex++] = code;
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// Remember whether the last code was printable or not (excluding CODE_STOP)
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if (code !== Code128Reader.CODE_STOP) {
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lastCharacterWasPrintable = true;
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}
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// Add to checksum computation (if not CODE_STOP of course)
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if (code !== Code128Reader.CODE_STOP) {
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multiplier++;
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checksumTotal += multiplier * code;
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}
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// Advance to where the next code will to start
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lastStart = nextStart;
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nextStart += counters.reduce(function (previous, current) { return previous + current; }, 0);
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// Take care of illegal start codes
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switch (code) {
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case Code128Reader.CODE_START_A:
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case Code128Reader.CODE_START_B:
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case Code128Reader.CODE_START_C:
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throw new FormatException_1.default();
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}
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switch (codeSet) {
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case Code128Reader.CODE_CODE_A:
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if (code < 64) {
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if (shiftUpperMode === upperMode) {
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result += String.fromCharCode((' '.charCodeAt(0) + code));
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}
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else {
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result += String.fromCharCode((' '.charCodeAt(0) + code + 128));
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}
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shiftUpperMode = false;
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}
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else if (code < 96) {
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if (shiftUpperMode === upperMode) {
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result += String.fromCharCode((code - 64));
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}
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else {
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result += String.fromCharCode((code + 64));
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}
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shiftUpperMode = false;
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}
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else {
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// Don't let CODE_STOP, which always appears, affect whether whether we think the last
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// code was printable or not.
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if (code !== Code128Reader.CODE_STOP) {
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lastCharacterWasPrintable = false;
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}
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switch (code) {
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case Code128Reader.CODE_FNC_1:
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if (convertFNC1) {
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if (result.length === 0) {
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// GS1 specification 5.4.3.7. and 5.4.6.4. If the first char after the start code
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// is FNC1 then this is GS1-128. We add the symbology identifier.
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result += ']C1';
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}
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else {
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// GS1 specification 5.4.7.5. Every subsequent FNC1 is returned as ASCII 29 (GS)
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result += String.fromCharCode(29);
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}
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}
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break;
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case Code128Reader.CODE_FNC_2:
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case Code128Reader.CODE_FNC_3:
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// do nothing?
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break;
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case Code128Reader.CODE_FNC_4_A:
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if (!upperMode && shiftUpperMode) {
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upperMode = true;
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shiftUpperMode = false;
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}
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else if (upperMode && shiftUpperMode) {
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upperMode = false;
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shiftUpperMode = false;
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}
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else {
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shiftUpperMode = true;
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}
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break;
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case Code128Reader.CODE_SHIFT:
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isNextShifted = true;
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codeSet = Code128Reader.CODE_CODE_B;
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break;
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case Code128Reader.CODE_CODE_B:
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codeSet = Code128Reader.CODE_CODE_B;
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break;
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case Code128Reader.CODE_CODE_C:
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codeSet = Code128Reader.CODE_CODE_C;
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break;
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case Code128Reader.CODE_STOP:
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done = true;
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break;
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}
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}
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break;
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case Code128Reader.CODE_CODE_B:
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if (code < 96) {
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if (shiftUpperMode === upperMode) {
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result += String.fromCharCode((' '.charCodeAt(0) + code));
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}
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else {
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result += String.fromCharCode((' '.charCodeAt(0) + code + 128));
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}
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shiftUpperMode = false;
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}
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else {
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if (code !== Code128Reader.CODE_STOP) {
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lastCharacterWasPrintable = false;
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}
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switch (code) {
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case Code128Reader.CODE_FNC_1:
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if (convertFNC1) {
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if (result.length === 0) {
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// GS1 specification 5.4.3.7. and 5.4.6.4. If the first char after the start code
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// is FNC1 then this is GS1-128. We add the symbology identifier.
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result += ']C1';
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}
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else {
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// GS1 specification 5.4.7.5. Every subsequent FNC1 is returned as ASCII 29 (GS)
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result += String.fromCharCode(29);
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}
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}
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break;
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case Code128Reader.CODE_FNC_2:
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case Code128Reader.CODE_FNC_3:
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// do nothing?
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break;
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case Code128Reader.CODE_FNC_4_B:
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if (!upperMode && shiftUpperMode) {
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upperMode = true;
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shiftUpperMode = false;
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}
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else if (upperMode && shiftUpperMode) {
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upperMode = false;
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shiftUpperMode = false;
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}
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else {
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shiftUpperMode = true;
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}
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break;
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case Code128Reader.CODE_SHIFT:
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isNextShifted = true;
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codeSet = Code128Reader.CODE_CODE_A;
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break;
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case Code128Reader.CODE_CODE_A:
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codeSet = Code128Reader.CODE_CODE_A;
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break;
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case Code128Reader.CODE_CODE_C:
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codeSet = Code128Reader.CODE_CODE_C;
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break;
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case Code128Reader.CODE_STOP:
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done = true;
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break;
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}
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}
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break;
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case Code128Reader.CODE_CODE_C:
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if (code < 100) {
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if (code < 10) {
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result += '0';
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}
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result += code;
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}
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else {
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if (code !== Code128Reader.CODE_STOP) {
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lastCharacterWasPrintable = false;
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}
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switch (code) {
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case Code128Reader.CODE_FNC_1:
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if (convertFNC1) {
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if (result.length === 0) {
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// GS1 specification 5.4.3.7. and 5.4.6.4. If the first char after the start code
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// is FNC1 then this is GS1-128. We add the symbology identifier.
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result += ']C1';
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}
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else {
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// GS1 specification 5.4.7.5. Every subsequent FNC1 is returned as ASCII 29 (GS)
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result += String.fromCharCode(29);
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}
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}
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break;
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case Code128Reader.CODE_CODE_A:
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codeSet = Code128Reader.CODE_CODE_A;
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break;
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case Code128Reader.CODE_CODE_B:
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codeSet = Code128Reader.CODE_CODE_B;
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break;
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case Code128Reader.CODE_STOP:
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done = true;
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break;
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}
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}
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break;
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}
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// Unshift back to another code set if we were shifted
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if (unshift) {
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codeSet = codeSet === Code128Reader.CODE_CODE_A ? Code128Reader.CODE_CODE_B : Code128Reader.CODE_CODE_A;
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}
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}
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var lastPatternSize = nextStart - lastStart;
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// Check for ample whitespace following pattern, but, to do this we first need to remember that
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// we fudged decoding CODE_STOP since it actually has 7 bars, not 6. There is a black bar left
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// to read off. Would be slightly better to properly read. Here we just skip it:
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nextStart = row.getNextUnset(nextStart);
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if (!row.isRange(nextStart, Math.min(row.getSize(), nextStart + (nextStart - lastStart) / 2), false)) {
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throw new NotFoundException_1.default();
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}
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// Pull out from sum the value of the penultimate check code
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checksumTotal -= multiplier * lastCode;
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// lastCode is the checksum then:
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if (checksumTotal % 103 !== lastCode) {
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throw new ChecksumException_1.default();
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}
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// Need to pull out the check digits from string
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var resultLength = result.length;
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if (resultLength === 0) {
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// false positive
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throw new NotFoundException_1.default();
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}
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// Only bother if the result had at least one character, and if the checksum digit happened to
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// be a printable character. If it was just interpreted as a control code, nothing to remove.
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if (resultLength > 0 && lastCharacterWasPrintable) {
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if (codeSet === Code128Reader.CODE_CODE_C) {
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result = result.substring(0, resultLength - 2);
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}
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else {
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result = result.substring(0, resultLength - 1);
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}
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}
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var left = (startPatternInfo[1] + startPatternInfo[0]) / 2.0;
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var right = lastStart + lastPatternSize / 2.0;
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var rawCodesSize = rawCodes.length;
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var rawBytes = new Uint8Array(rawCodesSize);
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for (var i = 0; i < rawCodesSize; i++) {
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rawBytes[i] = rawCodes[i];
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}
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var points = [new ResultPoint_1.default(left, rowNumber), new ResultPoint_1.default(right, rowNumber)];
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return new Result_1.default(result, rawBytes, 0, points, BarcodeFormat_1.default.CODE_128, new Date().getTime());
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};
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Code128Reader.CODE_PATTERNS = [
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Int32Array.from([2, 1, 2, 2, 2, 2]),
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Int32Array.from([2, 2, 2, 1, 2, 2]),
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Int32Array.from([2, 2, 2, 2, 2, 1]),
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Int32Array.from([1, 2, 1, 2, 2, 3]),
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Int32Array.from([1, 2, 1, 3, 2, 2]),
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Int32Array.from([1, 3, 1, 2, 2, 2]),
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Int32Array.from([1, 2, 2, 2, 1, 3]),
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Int32Array.from([1, 2, 2, 3, 1, 2]),
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Int32Array.from([1, 3, 2, 2, 1, 2]),
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Int32Array.from([2, 2, 1, 2, 1, 3]),
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Int32Array.from([2, 2, 1, 3, 1, 2]),
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Int32Array.from([2, 3, 1, 2, 1, 2]),
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Int32Array.from([1, 1, 2, 2, 3, 2]),
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Int32Array.from([1, 2, 2, 1, 3, 2]),
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Int32Array.from([1, 2, 2, 2, 3, 1]),
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Int32Array.from([1, 1, 3, 2, 2, 2]),
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Int32Array.from([1, 2, 3, 1, 2, 2]),
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Int32Array.from([1, 2, 3, 2, 2, 1]),
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Int32Array.from([2, 2, 3, 2, 1, 1]),
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Int32Array.from([2, 2, 1, 1, 3, 2]),
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Int32Array.from([2, 2, 1, 2, 3, 1]),
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Int32Array.from([2, 1, 3, 2, 1, 2]),
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Int32Array.from([2, 2, 3, 1, 1, 2]),
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Int32Array.from([3, 1, 2, 1, 3, 1]),
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Int32Array.from([3, 1, 1, 2, 2, 2]),
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Int32Array.from([3, 2, 1, 1, 2, 2]),
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Int32Array.from([3, 2, 1, 2, 2, 1]),
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Int32Array.from([3, 1, 2, 2, 1, 2]),
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Int32Array.from([3, 2, 2, 1, 1, 2]),
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Int32Array.from([3, 2, 2, 2, 1, 1]),
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Int32Array.from([2, 1, 2, 1, 2, 3]),
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Int32Array.from([2, 1, 2, 3, 2, 1]),
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Int32Array.from([2, 3, 2, 1, 2, 1]),
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Int32Array.from([1, 1, 1, 3, 2, 3]),
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Int32Array.from([1, 3, 1, 1, 2, 3]),
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Int32Array.from([1, 3, 1, 3, 2, 1]),
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Int32Array.from([1, 1, 2, 3, 1, 3]),
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Int32Array.from([1, 3, 2, 1, 1, 3]),
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Int32Array.from([1, 3, 2, 3, 1, 1]),
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Int32Array.from([2, 1, 1, 3, 1, 3]),
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Int32Array.from([2, 3, 1, 1, 1, 3]),
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Int32Array.from([2, 3, 1, 3, 1, 1]),
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Int32Array.from([1, 1, 2, 1, 3, 3]),
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Int32Array.from([1, 1, 2, 3, 3, 1]),
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Int32Array.from([1, 3, 2, 1, 3, 1]),
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Int32Array.from([1, 1, 3, 1, 2, 3]),
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Int32Array.from([1, 1, 3, 3, 2, 1]),
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Int32Array.from([1, 3, 3, 1, 2, 1]),
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Int32Array.from([3, 1, 3, 1, 2, 1]),
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Int32Array.from([2, 1, 1, 3, 3, 1]),
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Int32Array.from([2, 3, 1, 1, 3, 1]),
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Int32Array.from([2, 1, 3, 1, 1, 3]),
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Int32Array.from([2, 1, 3, 3, 1, 1]),
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Int32Array.from([2, 1, 3, 1, 3, 1]),
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Int32Array.from([3, 1, 1, 1, 2, 3]),
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Int32Array.from([3, 1, 1, 3, 2, 1]),
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Int32Array.from([3, 3, 1, 1, 2, 1]),
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Int32Array.from([3, 1, 2, 1, 1, 3]),
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Int32Array.from([3, 1, 2, 3, 1, 1]),
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Int32Array.from([3, 3, 2, 1, 1, 1]),
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Int32Array.from([3, 1, 4, 1, 1, 1]),
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Int32Array.from([2, 2, 1, 4, 1, 1]),
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Int32Array.from([4, 3, 1, 1, 1, 1]),
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Int32Array.from([1, 1, 1, 2, 2, 4]),
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Int32Array.from([1, 1, 1, 4, 2, 2]),
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Int32Array.from([1, 2, 1, 1, 2, 4]),
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Int32Array.from([1, 2, 1, 4, 2, 1]),
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Int32Array.from([1, 4, 1, 1, 2, 2]),
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Int32Array.from([1, 4, 1, 2, 2, 1]),
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Int32Array.from([1, 1, 2, 2, 1, 4]),
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Int32Array.from([1, 1, 2, 4, 1, 2]),
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Int32Array.from([1, 2, 2, 1, 1, 4]),
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Int32Array.from([1, 2, 2, 4, 1, 1]),
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Int32Array.from([1, 4, 2, 1, 1, 2]),
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Int32Array.from([1, 4, 2, 2, 1, 1]),
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Int32Array.from([2, 4, 1, 2, 1, 1]),
|
Int32Array.from([2, 2, 1, 1, 1, 4]),
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Int32Array.from([4, 1, 3, 1, 1, 1]),
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Int32Array.from([2, 4, 1, 1, 1, 2]),
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Int32Array.from([1, 3, 4, 1, 1, 1]),
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Int32Array.from([1, 1, 1, 2, 4, 2]),
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Int32Array.from([1, 2, 1, 1, 4, 2]),
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Int32Array.from([1, 2, 1, 2, 4, 1]),
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Int32Array.from([1, 1, 4, 2, 1, 2]),
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Int32Array.from([1, 2, 4, 1, 1, 2]),
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Int32Array.from([1, 2, 4, 2, 1, 1]),
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Int32Array.from([4, 1, 1, 2, 1, 2]),
|
Int32Array.from([4, 2, 1, 1, 1, 2]),
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Int32Array.from([4, 2, 1, 2, 1, 1]),
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Int32Array.from([2, 1, 2, 1, 4, 1]),
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Int32Array.from([2, 1, 4, 1, 2, 1]),
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Int32Array.from([4, 1, 2, 1, 2, 1]),
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Int32Array.from([1, 1, 1, 1, 4, 3]),
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Int32Array.from([1, 1, 1, 3, 4, 1]),
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Int32Array.from([1, 3, 1, 1, 4, 1]),
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Int32Array.from([1, 1, 4, 1, 1, 3]),
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Int32Array.from([1, 1, 4, 3, 1, 1]),
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Int32Array.from([4, 1, 1, 1, 1, 3]),
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Int32Array.from([4, 1, 1, 3, 1, 1]),
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Int32Array.from([1, 1, 3, 1, 4, 1]),
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Int32Array.from([1, 1, 4, 1, 3, 1]),
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Int32Array.from([3, 1, 1, 1, 4, 1]),
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Int32Array.from([4, 1, 1, 1, 3, 1]),
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Int32Array.from([2, 1, 1, 4, 1, 2]),
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Int32Array.from([2, 1, 1, 2, 1, 4]),
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Int32Array.from([2, 1, 1, 2, 3, 2]),
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Int32Array.from([2, 3, 3, 1, 1, 1, 2]),
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];
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Code128Reader.MAX_AVG_VARIANCE = 0.25;
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Code128Reader.MAX_INDIVIDUAL_VARIANCE = 0.7;
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Code128Reader.CODE_SHIFT = 98;
|
Code128Reader.CODE_CODE_C = 99;
|
Code128Reader.CODE_CODE_B = 100;
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Code128Reader.CODE_CODE_A = 101;
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Code128Reader.CODE_FNC_1 = 102;
|
Code128Reader.CODE_FNC_2 = 97;
|
Code128Reader.CODE_FNC_3 = 96;
|
Code128Reader.CODE_FNC_4_A = 101;
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Code128Reader.CODE_FNC_4_B = 100;
|
Code128Reader.CODE_START_A = 103;
|
Code128Reader.CODE_START_B = 104;
|
Code128Reader.CODE_START_C = 105;
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Code128Reader.CODE_STOP = 106;
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return Code128Reader;
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}(OneDReader_1.default));
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exports.default = Code128Reader;
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