| 1 | var CircularBuffer = module.exports = function(size) {
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| 2 | this.pos = 0;
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| 3 | this._buf = [];
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| 4 | this.size = size;
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| 5 | }
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| 6 |
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| 7 | CircularBuffer.prototype.get = function(i) {
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| 8 | if (i == undefined) i = 0;
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| 9 | if (i >= this.size) return undefined;
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| 10 | if (i >= this._buf.length) return undefined;
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| 11 | return this._buf[(this.pos - i - 1) % this.size];
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| 12 | }
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| 13 |
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| 14 | CircularBuffer.prototype.push = function(o) {
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| 15 | this._buf[this.pos % this.size] = o;
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| 16 | return this.pos++;
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| 17 | }
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