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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 3x 3x 3x 1x 1x 3x 3x 1x 1x 1x 1x 1x 1x 3x 3x 3x 3x 3x 3x 2x 2x 1x 1x 2x 3x | /* ** MQTT+ -- MQTT Communication Patterns ** Copyright (c) 2018-2026 Dr. Ralf S. Engelschall <rse@engelschall.com> ** ** Permission is hereby granted, free of charge, to any person obtaining ** a copy of this software and associated documentation files (the ** "Software"), to deal in the Software without restriction, including ** without limitation the rights to use, copy, modify, merge, publish, ** distribute, sublicense, and/or sell copies of the Software, and to ** permit persons to whom the Software is furnished to do so, subject to ** the following conditions: ** ** The above copyright notice and this permission notice shall be included ** in all copies or substantial portions of the Software. ** ** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE ** SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /* built-in requirements */ import { Buffer } from "node:buffer" /* internal requirements */ import type { APISchema } from "./mqtt-plus-api" import { CodecTrait } from "./mqtt-plus-codec" /* encoding trait */ export class EncodeTrait<T extends APISchema = APISchema> extends CodecTrait<T> { /* reusable encoder/decoder instances */ private static encoder = new TextEncoder() private static decoder = new TextDecoder() /* convert character string to buffer */ str2buf (data: string): Uint8Array { return EncodeTrait.encoder.encode(data) } /* convert buffer to character string */ buf2str (data: Uint8Array): string { return EncodeTrait.decoder.decode(data) } /* convert byte-based typed array to buffer */ arr2buf (data: Buffer | Uint8Array | Int8Array): Uint8Array { let buffer: Uint8Array if (data instanceof Uint8Array) buffer = data else buffer = new Uint8Array(data.buffer, data.byteOffset, data.byteLength) return buffer } /* convert buffer to byte-based typed array */ buf2arr (data: Uint8Array, type: new () => Buffer): Buffer buf2arr (data: Uint8Array, type: new () => Uint8Array): Uint8Array buf2arr (data: Uint8Array, type: new () => Int8Array): Int8Array buf2arr <T extends Buffer | Uint8Array | Int8Array>(data: Uint8Array, cons: new (...args: any[]) => T): T { let arr: T | undefined const ctor: unknown = cons if (ctor === Buffer) arr = Buffer.from(data.buffer, data.byteOffset, data.byteLength) as T else if (ctor === Uint8Array) arr = data as T else if (ctor === Int8Array) arr = new Int8Array(data.buffer, data.byteOffset, data.byteLength) as T else throw new Error("invalid data type") return arr } } |