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207 lines
15 KiB
JavaScript
207 lines
15 KiB
JavaScript
var FormatInformation = require('./FormatInformation')
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var BitMatrix = require('./BitMatix')
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function ECB(count, dataCodewords) {
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this.count = count;
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this.dataCodewords = dataCodewords;
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this.__defineGetter__("Count", function () {
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return this.count;
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});
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this.__defineGetter__("DataCodewords", function () {
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return this.dataCodewords;
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});
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}
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function ECBlocks(ecCodewordsPerBlock, ecBlocks1, ecBlocks2) {
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this.ecCodewordsPerBlock = ecCodewordsPerBlock;
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if (ecBlocks2)
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this.ecBlocks = new Array(ecBlocks1, ecBlocks2);
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else
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this.ecBlocks = new Array(ecBlocks1);
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this.__defineGetter__("ECCodewordsPerBlock", function () {
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return this.ecCodewordsPerBlock;
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});
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this.__defineGetter__("TotalECCodewords", function () {
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return this.ecCodewordsPerBlock * this.NumBlocks;
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});
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this.__defineGetter__("NumBlocks", function () {
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var total = 0;
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for (var i = 0; i < this.ecBlocks.length; i++) {
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total += this.ecBlocks[i].length;
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}
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return total;
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});
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this.getECBlocks = function () {
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return this.ecBlocks;
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}
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}
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function Version(versionNumber, alignmentPatternCenters, ecBlocks1, ecBlocks2, ecBlocks3, ecBlocks4) {
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this.versionNumber = versionNumber;
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this.alignmentPatternCenters = alignmentPatternCenters;
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this.ecBlocks = new Array(ecBlocks1, ecBlocks2, ecBlocks3, ecBlocks4);
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var total = 0;
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var ecCodewords = ecBlocks1.ECCodewordsPerBlock;
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var ecbArray = ecBlocks1.getECBlocks();
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for (var i = 0; i < ecbArray.length; i++) {
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var ecBlock = ecbArray[i];
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total += ecBlock.Count * (ecBlock.DataCodewords + ecCodewords);
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}
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this.totalCodewords = total;
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this.__defineGetter__("VersionNumber", function () {
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return this.versionNumber;
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});
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this.__defineGetter__("AlignmentPatternCenters", function () {
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return this.alignmentPatternCenters;
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});
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this.__defineGetter__("TotalCodewords", function () {
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return this.totalCodewords;
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});
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this.__defineGetter__("DimensionForVersion", function () {
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return 17 + 4 * this.versionNumber;
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});
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this.buildFunctionPattern = function () {
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var dimension = this.DimensionForVersion;
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var bitMatrix = new BitMatrix(dimension);
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// Top left finder pattern + separator + format
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bitMatrix.setRegion(0, 0, 9, 9);
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// Top right finder pattern + separator + format
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bitMatrix.setRegion(dimension - 8, 0, 8, 9);
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// Bottom left finder pattern + separator + format
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bitMatrix.setRegion(0, dimension - 8, 9, 8);
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// Alignment patterns
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var max = this.alignmentPatternCenters.length;
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for (var x = 0; x < max; x++) {
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var i = this.alignmentPatternCenters[x] - 2;
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for (var y = 0; y < max; y++) {
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if ((x == 0 && (y == 0 || y == max - 1)) || (x == max - 1 && y == 0)) {
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// No alignment patterns near the three finder paterns
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continue;
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}
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bitMatrix.setRegion(this.alignmentPatternCenters[y] - 2, i, 5, 5);
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}
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}
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// Vertical timing pattern
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bitMatrix.setRegion(6, 9, 1, dimension - 17);
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// Horizontal timing pattern
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bitMatrix.setRegion(9, 6, dimension - 17, 1);
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if (this.versionNumber > 6) {
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// Version info, top right
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bitMatrix.setRegion(dimension - 11, 0, 3, 6);
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// Version info, bottom left
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bitMatrix.setRegion(0, dimension - 11, 6, 3);
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}
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return bitMatrix;
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}
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this.getECBlocksForLevel = function (ecLevel) {
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return this.ecBlocks[ecLevel.ordinal()];
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}
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}
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Version.VERSION_DECODE_INFO = new Array(0x07C94, 0x085BC, 0x09A99, 0x0A4D3, 0x0BBF6, 0x0C762, 0x0D847, 0x0E60D, 0x0F928, 0x10B78, 0x1145D, 0x12A17, 0x13532, 0x149A6, 0x15683, 0x168C9, 0x177EC, 0x18EC4, 0x191E1, 0x1AFAB, 0x1B08E, 0x1CC1A, 0x1D33F, 0x1ED75, 0x1F250, 0x209D5, 0x216F0, 0x228BA, 0x2379F, 0x24B0B, 0x2542E, 0x26A64, 0x27541, 0x28C69);
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Version.VERSIONS = buildVersions();
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Version.getVersionForNumber = function (versionNumber) {
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if (versionNumber < 1 || versionNumber > 40) {
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throw "ArgumentException";
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}
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return Version.VERSIONS[versionNumber - 1];
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}
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Version.getProvisionalVersionForDimension = function (dimension) {
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if (dimension % 4 != 1) {
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throw "Error getProvisionalVersionForDimension";
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}
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try {
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return Version.getVersionForNumber((dimension - 17) >> 2);
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}
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catch (iae) {
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throw "Error getVersionForNumber";
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}
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}
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Version.decodeVersionInformation = function (versionBits) {
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var bestDifference = 0xffffffff;
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var bestVersion = 0;
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for (var i = 0; i < Version.VERSION_DECODE_INFO.length; i++) {
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var targetVersion = Version.VERSION_DECODE_INFO[i];
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// Do the version info bits match exactly? done.
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if (targetVersion == versionBits) {
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return this.getVersionForNumber(i + 7);
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}
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// Otherwise see if this is the closest to a real version info bit string
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// we have seen so far
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var bitsDifference = FormatInformation.numBitsDiffering(versionBits, targetVersion);
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if (bitsDifference < bestDifference) {
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bestVersion = i + 7;
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bestDifference = bitsDifference;
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}
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}
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// We can tolerate up to 3 bits of error since no two version info codewords will
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// differ in less than 4 bits.
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if (bestDifference <= 3) {
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return this.getVersionForNumber(bestVersion);
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}
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// If we didn't find a close enough match, fail
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return null;
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}
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function buildVersions() {
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return new Array(new Version(1, new Array(), new ECBlocks(7, new ECB(1, 19)), new ECBlocks(10, new ECB(1, 16)), new ECBlocks(13, new ECB(1, 13)), new ECBlocks(17, new ECB(1, 9))),
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new Version(2, new Array(6, 18), new ECBlocks(10, new ECB(1, 34)), new ECBlocks(16, new ECB(1, 28)), new ECBlocks(22, new ECB(1, 22)), new ECBlocks(28, new ECB(1, 16))),
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new Version(3, new Array(6, 22), new ECBlocks(15, new ECB(1, 55)), new ECBlocks(26, new ECB(1, 44)), new ECBlocks(18, new ECB(2, 17)), new ECBlocks(22, new ECB(2, 13))),
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new Version(4, new Array(6, 26), new ECBlocks(20, new ECB(1, 80)), new ECBlocks(18, new ECB(2, 32)), new ECBlocks(26, new ECB(2, 24)), new ECBlocks(16, new ECB(4, 9))),
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new Version(5, new Array(6, 30), new ECBlocks(26, new ECB(1, 108)), new ECBlocks(24, new ECB(2, 43)), new ECBlocks(18, new ECB(2, 15), new ECB(2, 16)), new ECBlocks(22, new ECB(2, 11), new ECB(2, 12))),
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new Version(6, new Array(6, 34), new ECBlocks(18, new ECB(2, 68)), new ECBlocks(16, new ECB(4, 27)), new ECBlocks(24, new ECB(4, 19)), new ECBlocks(28, new ECB(4, 15))),
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new Version(7, new Array(6, 22, 38), new ECBlocks(20, new ECB(2, 78)), new ECBlocks(18, new ECB(4, 31)), new ECBlocks(18, new ECB(2, 14), new ECB(4, 15)), new ECBlocks(26, new ECB(4, 13), new ECB(1, 14))),
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new Version(8, new Array(6, 24, 42), new ECBlocks(24, new ECB(2, 97)), new ECBlocks(22, new ECB(2, 38), new ECB(2, 39)), new ECBlocks(22, new ECB(4, 18), new ECB(2, 19)), new ECBlocks(26, new ECB(4, 14), new ECB(2, 15))),
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new Version(9, new Array(6, 26, 46), new ECBlocks(30, new ECB(2, 116)), new ECBlocks(22, new ECB(3, 36), new ECB(2, 37)), new ECBlocks(20, new ECB(4, 16), new ECB(4, 17)), new ECBlocks(24, new ECB(4, 12), new ECB(4, 13))),
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new Version(10, new Array(6, 28, 50), new ECBlocks(18, new ECB(2, 68), new ECB(2, 69)), new ECBlocks(26, new ECB(4, 43), new ECB(1, 44)), new ECBlocks(24, new ECB(6, 19), new ECB(2, 20)), new ECBlocks(28, new ECB(6, 15), new ECB(2, 16))),
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new Version(11, new Array(6, 30, 54), new ECBlocks(20, new ECB(4, 81)), new ECBlocks(30, new ECB(1, 50), new ECB(4, 51)), new ECBlocks(28, new ECB(4, 22), new ECB(4, 23)), new ECBlocks(24, new ECB(3, 12), new ECB(8, 13))),
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new Version(12, new Array(6, 32, 58), new ECBlocks(24, new ECB(2, 92), new ECB(2, 93)), new ECBlocks(22, new ECB(6, 36), new ECB(2, 37)), new ECBlocks(26, new ECB(4, 20), new ECB(6, 21)), new ECBlocks(28, new ECB(7, 14), new ECB(4, 15))),
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new Version(13, new Array(6, 34, 62), new ECBlocks(26, new ECB(4, 107)), new ECBlocks(22, new ECB(8, 37), new ECB(1, 38)), new ECBlocks(24, new ECB(8, 20), new ECB(4, 21)), new ECBlocks(22, new ECB(12, 11), new ECB(4, 12))),
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new Version(14, new Array(6, 26, 46, 66), new ECBlocks(30, new ECB(3, 115), new ECB(1, 116)), new ECBlocks(24, new ECB(4, 40), new ECB(5, 41)), new ECBlocks(20, new ECB(11, 16), new ECB(5, 17)), new ECBlocks(24, new ECB(11, 12), new ECB(5, 13))),
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new Version(15, new Array(6, 26, 48, 70), new ECBlocks(22, new ECB(5, 87), new ECB(1, 88)), new ECBlocks(24, new ECB(5, 41), new ECB(5, 42)), new ECBlocks(30, new ECB(5, 24), new ECB(7, 25)), new ECBlocks(24, new ECB(11, 12), new ECB(7, 13))),
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new Version(16, new Array(6, 26, 50, 74), new ECBlocks(24, new ECB(5, 98), new ECB(1, 99)), new ECBlocks(28, new ECB(7, 45), new ECB(3, 46)), new ECBlocks(24, new ECB(15, 19), new ECB(2, 20)), new ECBlocks(30, new ECB(3, 15), new ECB(13, 16))),
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new Version(17, new Array(6, 30, 54, 78), new ECBlocks(28, new ECB(1, 107), new ECB(5, 108)), new ECBlocks(28, new ECB(10, 46), new ECB(1, 47)), new ECBlocks(28, new ECB(1, 22), new ECB(15, 23)), new ECBlocks(28, new ECB(2, 14), new ECB(17, 15))),
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new Version(18, new Array(6, 30, 56, 82), new ECBlocks(30, new ECB(5, 120), new ECB(1, 121)), new ECBlocks(26, new ECB(9, 43), new ECB(4, 44)), new ECBlocks(28, new ECB(17, 22), new ECB(1, 23)), new ECBlocks(28, new ECB(2, 14), new ECB(19, 15))),
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new Version(19, new Array(6, 30, 58, 86), new ECBlocks(28, new ECB(3, 113), new ECB(4, 114)), new ECBlocks(26, new ECB(3, 44), new ECB(11, 45)), new ECBlocks(26, new ECB(17, 21), new ECB(4, 22)), new ECBlocks(26, new ECB(9, 13), new ECB(16, 14))),
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new Version(20, new Array(6, 34, 62, 90), new ECBlocks(28, new ECB(3, 107), new ECB(5, 108)), new ECBlocks(26, new ECB(3, 41), new ECB(13, 42)), new ECBlocks(30, new ECB(15, 24), new ECB(5, 25)), new ECBlocks(28, new ECB(15, 15), new ECB(10, 16))),
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new Version(21, new Array(6, 28, 50, 72, 94), new ECBlocks(28, new ECB(4, 116), new ECB(4, 117)), new ECBlocks(26, new ECB(17, 42)), new ECBlocks(28, new ECB(17, 22), new ECB(6, 23)), new ECBlocks(30, new ECB(19, 16), new ECB(6, 17))),
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new Version(22, new Array(6, 26, 50, 74, 98), new ECBlocks(28, new ECB(2, 111), new ECB(7, 112)), new ECBlocks(28, new ECB(17, 46)), new ECBlocks(30, new ECB(7, 24), new ECB(16, 25)), new ECBlocks(24, new ECB(34, 13))),
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new Version(23, new Array(6, 30, 54, 74, 102), new ECBlocks(30, new ECB(4, 121), new ECB(5, 122)), new ECBlocks(28, new ECB(4, 47), new ECB(14, 48)), new ECBlocks(30, new ECB(11, 24), new ECB(14, 25)), new ECBlocks(30, new ECB(16, 15), new ECB(14, 16))),
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new Version(24, new Array(6, 28, 54, 80, 106), new ECBlocks(30, new ECB(6, 117), new ECB(4, 118)), new ECBlocks(28, new ECB(6, 45), new ECB(14, 46)), new ECBlocks(30, new ECB(11, 24), new ECB(16, 25)), new ECBlocks(30, new ECB(30, 16), new ECB(2, 17))),
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new Version(25, new Array(6, 32, 58, 84, 110), new ECBlocks(26, new ECB(8, 106), new ECB(4, 107)), new ECBlocks(28, new ECB(8, 47), new ECB(13, 48)), new ECBlocks(30, new ECB(7, 24), new ECB(22, 25)), new ECBlocks(30, new ECB(22, 15), new ECB(13, 16))),
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new Version(26, new Array(6, 30, 58, 86, 114), new ECBlocks(28, new ECB(10, 114), new ECB(2, 115)), new ECBlocks(28, new ECB(19, 46), new ECB(4, 47)), new ECBlocks(28, new ECB(28, 22), new ECB(6, 23)), new ECBlocks(30, new ECB(33, 16), new ECB(4, 17))),
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new Version(27, new Array(6, 34, 62, 90, 118), new ECBlocks(30, new ECB(8, 122), new ECB(4, 123)), new ECBlocks(28, new ECB(22, 45), new ECB(3, 46)), new ECBlocks(30, new ECB(8, 23), new ECB(26, 24)), new ECBlocks(30, new ECB(12, 15), new ECB(28, 16))),
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new Version(28, new Array(6, 26, 50, 74, 98, 122), new ECBlocks(30, new ECB(3, 117), new ECB(10, 118)), new ECBlocks(28, new ECB(3, 45), new ECB(23, 46)), new ECBlocks(30, new ECB(4, 24), new ECB(31, 25)), new ECBlocks(30, new ECB(11, 15), new ECB(31, 16))),
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new Version(29, new Array(6, 30, 54, 78, 102, 126), new ECBlocks(30, new ECB(7, 116), new ECB(7, 117)), new ECBlocks(28, new ECB(21, 45), new ECB(7, 46)), new ECBlocks(30, new ECB(1, 23), new ECB(37, 24)), new ECBlocks(30, new ECB(19, 15), new ECB(26, 16))),
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new Version(30, new Array(6, 26, 52, 78, 104, 130), new ECBlocks(30, new ECB(5, 115), new ECB(10, 116)), new ECBlocks(28, new ECB(19, 47), new ECB(10, 48)), new ECBlocks(30, new ECB(15, 24), new ECB(25, 25)), new ECBlocks(30, new ECB(23, 15), new ECB(25, 16))),
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new Version(31, new Array(6, 30, 56, 82, 108, 134), new ECBlocks(30, new ECB(13, 115), new ECB(3, 116)), new ECBlocks(28, new ECB(2, 46), new ECB(29, 47)), new ECBlocks(30, new ECB(42, 24), new ECB(1, 25)), new ECBlocks(30, new ECB(23, 15), new ECB(28, 16))),
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new Version(32, new Array(6, 34, 60, 86, 112, 138), new ECBlocks(30, new ECB(17, 115)), new ECBlocks(28, new ECB(10, 46), new ECB(23, 47)), new ECBlocks(30, new ECB(10, 24), new ECB(35, 25)), new ECBlocks(30, new ECB(19, 15), new ECB(35, 16))),
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new Version(33, new Array(6, 30, 58, 86, 114, 142), new ECBlocks(30, new ECB(17, 115), new ECB(1, 116)), new ECBlocks(28, new ECB(14, 46), new ECB(21, 47)), new ECBlocks(30, new ECB(29, 24), new ECB(19, 25)), new ECBlocks(30, new ECB(11, 15), new ECB(46, 16))),
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new Version(34, new Array(6, 34, 62, 90, 118, 146), new ECBlocks(30, new ECB(13, 115), new ECB(6, 116)), new ECBlocks(28, new ECB(14, 46), new ECB(23, 47)), new ECBlocks(30, new ECB(44, 24), new ECB(7, 25)), new ECBlocks(30, new ECB(59, 16), new ECB(1, 17))),
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new Version(35, new Array(6, 30, 54, 78, 102, 126, 150), new ECBlocks(30, new ECB(12, 121), new ECB(7, 122)), new ECBlocks(28, new ECB(12, 47), new ECB(26, 48)), new ECBlocks(30, new ECB(39, 24), new ECB(14, 25)), new ECBlocks(30, new ECB(22, 15), new ECB(41, 16))),
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new Version(36, new Array(6, 24, 50, 76, 102, 128, 154), new ECBlocks(30, new ECB(6, 121), new ECB(14, 122)), new ECBlocks(28, new ECB(6, 47), new ECB(34, 48)), new ECBlocks(30, new ECB(46, 24), new ECB(10, 25)), new ECBlocks(30, new ECB(2, 15), new ECB(64, 16))),
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new Version(37, new Array(6, 28, 54, 80, 106, 132, 158), new ECBlocks(30, new ECB(17, 122), new ECB(4, 123)), new ECBlocks(28, new ECB(29, 46), new ECB(14, 47)), new ECBlocks(30, new ECB(49, 24), new ECB(10, 25)), new ECBlocks(30, new ECB(24, 15), new ECB(46, 16))),
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new Version(38, new Array(6, 32, 58, 84, 110, 136, 162), new ECBlocks(30, new ECB(4, 122), new ECB(18, 123)), new ECBlocks(28, new ECB(13, 46), new ECB(32, 47)), new ECBlocks(30, new ECB(48, 24), new ECB(14, 25)), new ECBlocks(30, new ECB(42, 15), new ECB(32, 16))),
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new Version(39, new Array(6, 26, 54, 82, 110, 138, 166), new ECBlocks(30, new ECB(20, 117), new ECB(4, 118)), new ECBlocks(28, new ECB(40, 47), new ECB(7, 48)), new ECBlocks(30, new ECB(43, 24), new ECB(22, 25)), new ECBlocks(30, new ECB(10, 15), new ECB(67, 16))),
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new Version(40, new Array(6, 30, 58, 86, 114, 142, 170), new ECBlocks(30, new ECB(19, 118), new ECB(6, 119)), new ECBlocks(28, new ECB(18, 47), new ECB(31, 48)), new ECBlocks(30, new ECB(34, 24), new ECB(34, 25)), new ECBlocks(30, new ECB(20, 15), new ECB(61, 16))));
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}
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module.exports = Version; |