node-noise/lib/length-prefixed-decoder.js

"use strict";
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    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };
    return function (d, b) {
        if (typeof b !== "function" && b !== null)
            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
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    __assign = Object.assign || function(t) {
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            s = arguments[i];
            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
                t[p] = s[p];
        }
        return t;
    };
    return __assign.apply(this, arguments);
};
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
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    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
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    Object.defineProperty(o, "default", { enumerable: true, value: v });
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var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
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    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.LengthPrefixedDecoder = void 0;
var streams = __importStar(require("stream"));
var uint8arraylist_1 = require("./uint8arraylist");
var encoder_1 = require("./encoder");
var LengthPrefixedDecoder = /** @class */ (function (_super) {
    __extends(LengthPrefixedDecoder, _super);
    function LengthPrefixedDecoder(options) {
        var _this = _super.call(this, __assign({ autoDestroy: true }, options)) || this;
        _this.receiveBuffer = new uint8arraylist_1.Uint8ArrayList();
        _this.nextWrite = null;
        return _this;
    }
    LengthPrefixedDecoder.prototype._read = function (size) {
        var nextWrite = this.nextWrite;
        this.nextWrite = null;
        if (nextWrite) {
            nextWrite();
        }
    };
    LengthPrefixedDecoder.prototype._write = function (chunk, encoding, callback) {
        var _this = this;
        this.receiveBuffer.append(chunk);
        var next = function () {
            if (_this.receiveBuffer.length >= 2) {
                var length_1 = (0, encoder_1.uint16BEDecode)(_this.receiveBuffer);
                if (_this.receiveBuffer.length >= (2 + length_1)) {
                    var data = _this.receiveBuffer.slice(2, 2 + length_1);
                    _this.receiveBuffer.consume(2 + length_1);
                    if (_this.push(data)) {
                        setImmediate(next);
                    }
                    else {
                        _this.nextWrite = next;
                    }
                    return;
                }
            }
            callback();
        };
        next();
    };
    return LengthPrefixedDecoder;
}(streams.Duplex));
exports.LengthPrefixedDecoder = LengthPrefixedDecoder;
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