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reValuate/node_modules/fbjs/lib/CircularBuffer.js.flow
2021-04-02 02:24:13 +03:00

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/**
* Copyright (c) 2013-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @providesModule CircularBuffer
*/
var invariant = require("./invariant");
class CircularBuffer {
constructor(size) {
invariant(size > 0, 'Buffer size should be a positive integer');
this._size = size;
this._head = 0;
this._buffer = [];
}
write(entry) {
if (this._buffer.length < this._size) {
this._buffer.push(entry);
} else {
this._buffer[this._head] = entry;
this._head++;
this._head %= this._size;
}
return this;
}
read() {
return this._buffer.slice(this._head).concat(this._buffer.slice(0, this._head));
}
clear() {
this._head = 0;
this._buffer = [];
return this;
}
}
module.exports = CircularBuffer;