zxing/lib/urshift.js

A port of LazarSoft's jsqrcode to npm (see https://github.com/LazarSoft/jsqrcode)

/*
  Ported to JavaScript by Lazar Laszlo 2011

  lazarsoft@gmail.com, www.lazarsoft.info

*/

/*
*
* Copyright 2007 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.
*/

!(function() {
'use strict';

module.exports = function( number,  bits)
{
    if (number >= 0)
        return number >> bits;
    else
        return (number >> bits) + (2 << ~bits);
}
}).call({});