| 1 | function QRBitBuffer() {
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| 2 | this.buffer = new Array();
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| 3 | this.length = 0;
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| 4 | }
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| 5 |
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| 6 | QRBitBuffer.prototype = {
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| 7 |
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| 8 | get : function(index) {
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| 9 | var bufIndex = Math.floor(index / 8);
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| 10 | return ( (this.buffer[bufIndex] >>> (7 - index % 8) ) & 1) == 1;
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| 11 | },
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| 12 |
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| 13 | put : function(num, length) {
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| 14 | for (var i = 0; i < length; i++) {
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| 15 | this.putBit( ( (num >>> (length - i - 1) ) & 1) == 1);
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| 16 | }
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| 17 | },
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| 18 |
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| 19 | getLengthInBits : function() {
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| 20 | return this.length;
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| 21 | },
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| 22 |
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| 23 | putBit : function(bit) {
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| 24 |
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| 25 | var bufIndex = Math.floor(this.length / 8);
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| 26 | if (this.buffer.length <= bufIndex) {
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| 27 | this.buffer.push(0);
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| 28 | }
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| 29 |
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| 30 | if (bit) {
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| 31 | this.buffer[bufIndex] |= (0x80 >>> (this.length % 8) );
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| 32 | }
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| 33 |
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| 34 | this.length++;
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| 35 | }
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| 36 | };
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| 37 |
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| 38 | module.exports = QRBitBuffer;
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