zigbee-herdsman
Version:
An open source ZigBee gateway solution with node.js.
109 lines • 3.89 kB
JavaScript
;
/* v8 ignore start */
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)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
return ar;
};
return ownKeys(o);
};
return function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
__setModuleDefault(result, mod);
return result;
};
})();
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Parser = void 0;
const stream = __importStar(require("node:stream"));
const logger_1 = require("../../../utils/logger");
const consts = __importStar(require("./consts"));
const frame_1 = __importDefault(require("./frame"));
const NS = "zh:ezsp:uart";
class Parser extends stream.Transform {
tail;
constructor() {
super();
this.tail = [];
}
_transform(chunk, _, cb) {
if (chunk.indexOf(consts.CANCEL) >= 0) {
this.reset();
chunk = chunk.subarray(chunk.lastIndexOf(consts.CANCEL) + 1);
}
if (chunk.indexOf(consts.SUBSTITUTE) >= 0) {
this.reset();
chunk = chunk.subarray(chunk.indexOf(consts.FLAG) + 1);
}
logger_1.logger.debug(`<-- [${chunk.toString("hex")}]`, NS);
let delimiterPlace = chunk.indexOf(consts.FLAG);
while (delimiterPlace >= 0) {
const buffer = chunk.subarray(0, delimiterPlace + 1);
const frameBuffer = Buffer.from([...this.unstuff(Buffer.concat([...this.tail, buffer]))]);
this.reset();
try {
const frame = frame_1.default.fromBuffer(frameBuffer);
if (frame) {
this.emit("parsed", frame);
}
}
catch (error) {
logger_1.logger.debug(`<-- error ${error}`, NS);
}
chunk = chunk.subarray(delimiterPlace + 1);
delimiterPlace = chunk.indexOf(consts.FLAG);
}
this.tail.push(chunk);
cb();
}
*unstuff(buffer) {
/* Unstuff (unescape) a buffer after receipt */
let escaped = false;
for (const byte of buffer) {
if (escaped) {
yield byte ^ consts.STUFF;
escaped = false;
}
else {
if (byte === consts.ESCAPE) {
escaped = true;
}
else if (byte === consts.XOFF || byte === consts.XON) {
// skip
}
else {
yield byte;
}
}
}
}
reset() {
// clear tail
this.tail.length = 0;
}
}
exports.Parser = Parser;
//# sourceMappingURL=parser.js.map