var __values = (this && this.__values) || function(o) {
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var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
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if (m) return m.call(o);
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if (o && typeof o.length === "number") return {
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next: function () {
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if (o && i >= o.length) o = void 0;
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return { value: o && o[i++], done: !o };
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}
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};
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throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
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};
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import IllegalArgumentException from '../../IllegalArgumentException';
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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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/**
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* <p>Encapsulates a block of data within a Data Matrix Code. Data Matrix Codes may split their data into
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* multiple blocks, each of which is a unit of data and error-correction codewords. Each
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* is represented by an instance of this class.</p>
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*
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* @author bbrown@google.com (Brian Brown)
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*/
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var DataBlock = /** @class */ (function () {
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function DataBlock(numDataCodewords, codewords) {
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this.numDataCodewords = numDataCodewords;
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this.codewords = codewords;
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}
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/**
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* <p>When Data Matrix Codes use multiple data blocks, they actually interleave the bytes of each of them.
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* That is, the first byte of data block 1 to n is written, then the second bytes, and so on. This
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* method will separate the data into original blocks.</p>
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*
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* @param rawCodewords bytes as read directly from the Data Matrix Code
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* @param version version of the Data Matrix Code
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* @return DataBlocks containing original bytes, "de-interleaved" from representation in the
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* Data Matrix Code
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*/
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DataBlock.getDataBlocks = function (rawCodewords, version) {
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var e_1, _a, e_2, _b;
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// Figure out the number and size of data blocks used by this version
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var ecBlocks = version.getECBlocks();
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// First count the total number of data blocks
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var totalBlocks = 0;
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var ecBlockArray = ecBlocks.getECBlocks();
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try {
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for (var ecBlockArray_1 = __values(ecBlockArray), ecBlockArray_1_1 = ecBlockArray_1.next(); !ecBlockArray_1_1.done; ecBlockArray_1_1 = ecBlockArray_1.next()) {
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var ecBlock = ecBlockArray_1_1.value;
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totalBlocks += ecBlock.getCount();
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}
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}
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catch (e_1_1) { e_1 = { error: e_1_1 }; }
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finally {
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try {
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if (ecBlockArray_1_1 && !ecBlockArray_1_1.done && (_a = ecBlockArray_1.return)) _a.call(ecBlockArray_1);
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}
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finally { if (e_1) throw e_1.error; }
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}
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// Now establish DataBlocks of the appropriate size and number of data codewords
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var result = new Array(totalBlocks);
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var numResultBlocks = 0;
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try {
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for (var ecBlockArray_2 = __values(ecBlockArray), ecBlockArray_2_1 = ecBlockArray_2.next(); !ecBlockArray_2_1.done; ecBlockArray_2_1 = ecBlockArray_2.next()) {
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var ecBlock = ecBlockArray_2_1.value;
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for (var i = 0; i < ecBlock.getCount(); i++) {
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var numDataCodewords = ecBlock.getDataCodewords();
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var numBlockCodewords = ecBlocks.getECCodewords() + numDataCodewords;
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result[numResultBlocks++] = new DataBlock(numDataCodewords, new Uint8Array(numBlockCodewords));
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}
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}
|
}
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catch (e_2_1) { e_2 = { error: e_2_1 }; }
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finally {
|
try {
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if (ecBlockArray_2_1 && !ecBlockArray_2_1.done && (_b = ecBlockArray_2.return)) _b.call(ecBlockArray_2);
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}
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finally { if (e_2) throw e_2.error; }
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}
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// All blocks have the same amount of data, except that the last n
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// (where n may be 0) have 1 less byte. Figure out where these start.
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// TODO(bbrown): There is only one case where there is a difference for Data Matrix for size 144
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var longerBlocksTotalCodewords = result[0].codewords.length;
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// int shorterBlocksTotalCodewords = longerBlocksTotalCodewords - 1;
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var longerBlocksNumDataCodewords = longerBlocksTotalCodewords - ecBlocks.getECCodewords();
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var shorterBlocksNumDataCodewords = longerBlocksNumDataCodewords - 1;
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// The last elements of result may be 1 element shorter for 144 matrix
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// first fill out as many elements as all of them have minus 1
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var rawCodewordsOffset = 0;
|
for (var i = 0; i < shorterBlocksNumDataCodewords; i++) {
|
for (var j = 0; j < numResultBlocks; j++) {
|
result[j].codewords[i] = rawCodewords[rawCodewordsOffset++];
|
}
|
}
|
// Fill out the last data block in the longer ones
|
var specialVersion = version.getVersionNumber() === 24;
|
var numLongerBlocks = specialVersion ? 8 : numResultBlocks;
|
for (var j = 0; j < numLongerBlocks; j++) {
|
result[j].codewords[longerBlocksNumDataCodewords - 1] = rawCodewords[rawCodewordsOffset++];
|
}
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// Now add in error correction blocks
|
var max = result[0].codewords.length;
|
for (var i = longerBlocksNumDataCodewords; i < max; i++) {
|
for (var j = 0; j < numResultBlocks; j++) {
|
var jOffset = specialVersion ? (j + 8) % numResultBlocks : j;
|
var iOffset = specialVersion && jOffset > 7 ? i - 1 : i;
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result[jOffset].codewords[iOffset] = rawCodewords[rawCodewordsOffset++];
|
}
|
}
|
if (rawCodewordsOffset !== rawCodewords.length) {
|
throw new IllegalArgumentException();
|
}
|
return result;
|
};
|
DataBlock.prototype.getNumDataCodewords = function () {
|
return this.numDataCodewords;
|
};
|
DataBlock.prototype.getCodewords = function () {
|
return this.codewords;
|
};
|
return DataBlock;
|
}());
|
export default DataBlock;
|
