@zxing/library
Version:
TypeScript port of ZXing multi-format 1D/2D barcode image processing library.
75 lines (74 loc) • 3.19 kB
JavaScript
/*
* Copyright 2013 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
import SimpleToken from './SimpleToken';
var BinaryShiftToken = /** @class */ (function (_super) {
__extends(BinaryShiftToken, _super);
function BinaryShiftToken(previous, binaryShiftStart, binaryShiftByteCount) {
var _this = _super.call(this, previous, 0, 0) || this;
_this.binaryShiftStart = binaryShiftStart;
_this.binaryShiftByteCount = binaryShiftByteCount;
return _this;
}
/**
* @Override
*/
BinaryShiftToken.prototype.appendTo = function (bitArray, text) {
for (var i = 0; i < this.binaryShiftByteCount; i++) {
if (i === 0 || (i === 31 && this.binaryShiftByteCount <= 62)) {
// We need a header before the first character, and before
// character 31 when the total byte code is <= 62
bitArray.appendBits(31, 5); // BINARY_SHIFT
if (this.binaryShiftByteCount > 62) {
bitArray.appendBits(this.binaryShiftByteCount - 31, 16);
}
else if (i === 0) {
// 1 <= binaryShiftByteCode <= 62
bitArray.appendBits(Math.min(this.binaryShiftByteCount, 31), 5);
}
else {
// 32 <= binaryShiftCount <= 62 and i == 31
bitArray.appendBits(this.binaryShiftByteCount - 31, 5);
}
}
bitArray.appendBits(text[this.binaryShiftStart + i], 8);
}
};
BinaryShiftToken.prototype.addBinaryShift = function (start, byteCount) {
// int bitCount = (byteCount * 8) + (byteCount <= 31 ? 10 : byteCount <= 62 ? 20 : 21);
return new BinaryShiftToken(this, start, byteCount);
};
/**
* @Override
*/
BinaryShiftToken.prototype.toString = function () {
return '<' + this.binaryShiftStart + '::' + (this.binaryShiftStart + this.binaryShiftByteCount - 1) + '>';
};
return BinaryShiftToken;
}(SimpleToken));
export default BinaryShiftToken;