'use strict';
var Buffer = require('buffer').Buffer; /*<replacement>*/ var bufferShim = require('buffer-shims'); /*</replacement>*/
module.exports = BufferList;
function BufferList() {
this.head = null; this.tail = null; this.length = 0;
}
BufferList.prototype.push = function (v) {
var entry = { data: v, next: null }; if (this.length > 0) this.tail.next = entry;else this.head = entry; this.tail = entry; ++this.length;
};
BufferList.prototype.unshift = function (v) {
var entry = { data: v, next: this.head }; if (this.length === 0) this.tail = entry; this.head = entry; ++this.length;
};
BufferList.prototype.shift = function () {
if (this.length === 0) return; var ret = this.head.data; if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next; --this.length; return ret;
};
BufferList.prototype.clear = function () {
this.head = this.tail = null; this.length = 0;
};
BufferList.prototype.join = function (s) {
if (this.length === 0) return ''; var p = this.head; var ret = '' + p.data; while (p = p.next) { ret += s + p.data; }return ret;
};
BufferList.prototype.concat = function (n) {
if (this.length === 0) return bufferShim.alloc(0); if (this.length === 1) return this.head.data; var ret = bufferShim.allocUnsafe(n >>> 0); var p = this.head; var i = 0; while (p) { p.data.copy(ret, i); i += p.data.length; p = p.next; } return ret;
};