replace number[] by Uint8Array

src/exceptions.ts

@@ -19,4 +19,7 @@ export namespace MeterbusLibExceptions {
 
     export class PayloadTooShortError extends InvalidTelegramError {
     }
+
+    export class IllegalNumberError extends InvalidTelegramError {
+    }
 }

src/longframe.ts

@@ -8,7 +8,7 @@ export namespace MeterbusLibLongFrame {
         private _fixedDataHeader : FixedDataHeader
         get fixedDataHeader() : FixedDataHeader { return this._fixedDataHeader }
 
-        constructor(telegram : number[]) {
+        constructor(telegram : Uint8Array) {
             super(telegram)
         }
 
@@ -20,7 +20,7 @@ export namespace MeterbusLibLongFrame {
     }
 
     export class FixedDataHeader {
-        private _data : number[]
+        private _data : Uint8Array
 
         private _identNo : number
         private _manufacturer : string
@@ -28,7 +28,7 @@ export namespace MeterbusLibLongFrame {
         private _medium : string
         private _accessNo : number
         private _status : number
-        private _signature : number[]
+        private _signature : Uint8Array
 
         get identNo() : number { return this._identNo }
         get manufacturer() : string { return this._manufacturer }
@@ -36,9 +36,9 @@ export namespace MeterbusLibLongFrame {
         get medium() : string { return this._medium }
         get accessNo() : number { return this._accessNo }
         get status() : number { return this._status }
-        get signature() : number[] { return this._signature }
+        get signature() : Uint8Array { return this._signature }
 
-        constructor(data : number[]) {
+        constructor(data : Uint8Array) {
             this._data = data
         }
 

src/meterbus.test.ts

@@ -43,6 +43,8 @@ let inputNOKLongframe_too_short = "68 02 02 68 01 02 03 16"
        
 let inputNOk_wrong_startcode = "15 01 02 03 16"
 
+let inputNOk_illegal_number = "10 01 260 03 16"
+
 
 
 describe('The Meterbus Library', () => {
@@ -54,7 +56,7 @@ describe('The Meterbus Library', () => {
     it('should parse the hexString into the telegram array', () => {
         const telegram = new MeterbusLib.Telegram()
         telegram.fromHexString("01 02 03")
-        expect(telegram.telegram).to.deep.equal([1, 2, 3])        
+        expect(telegram.telegram).to.deep.equal(new Uint8Array([1, 2, 3]))
     })
     it('should detect a control frame', () => {
         const telegram = new MeterbusLib.Telegram()
@@ -105,6 +107,10 @@ describe('The Meterbus Library', () => {
         telegram.fromHexString(inputNOKLongframe_too_short)
         expect(() => telegram.parse()).to.throw(MeterbusLibExceptions.PayloadTooShortError) 
     })
+    it('should detect an invalid number', () => {
+        const telegram = new MeterbusLib.Telegram()
+        expect(() => telegram.fromHexString(inputNOk_illegal_number)).to.throw(MeterbusLibExceptions.IllegalNumberError) 
+    })
     it('should parse cField from a short frame', () => {
         const telegram = new MeterbusLib.Telegram()
         telegram.fromHexString(inputOkShortframe)
@@ -171,7 +177,7 @@ describe('The Meterbus Library', () => {
         })
         it('should find the signature', () => {
             expect((telegram.frame as MeterbusLibLongFrame.LongFrame).fixedDataHeader.signature)
-              .to.deep.equal([0,0])
+              .to.deep.equal(new Uint8Array([0,0]))
         })
     })
 

src/meterbus.ts

@@ -7,7 +7,7 @@ export namespace MeterbusLib {
 
     export class Telegram {
         private _hexString : string
-        private _telegram : number[]
+        private _telegram : Uint8Array
         private _frame : MeterbusLibFrames.Frame
 
         constructor() {
@@ -17,7 +17,7 @@ export namespace MeterbusLib {
             return this._hexString
         }
 
-        get telegram() : number[] {
+        get telegram() : Uint8Array {
             return this._telegram
         }
 
@@ -27,9 +27,13 @@ export namespace MeterbusLib {
 
         fromHexString(hexString : string) {
             this._hexString = hexString
-            this._telegram = this._hexString.split(' ').map<number>((val) => {
-                return parseInt(val, 16)
-            })
+            this._telegram = new Uint8Array(this._hexString.split(' ').map<number>((val) => {
+                let n = parseInt(val, 16)
+                if ((n < 0) || (n > 255)) {
+                    throw new MeterbusLibExceptions.IllegalNumberError()
+                }
+                return n
+            }))
         }
 
         parse() {

src/simpleframes.ts

@@ -3,14 +3,14 @@ import {MeterbusLibExceptions} from './exceptions'
 
 export namespace MeterbusLibFrames {
     export abstract class Frame {
-        protected _telegram : number[]
+        protected _telegram : Uint8Array
         protected _startCharacter : number
         protected _frameLength : number
         protected _firstPayload : number
         protected _payloadLength : number
 
         constructor(startCharacter : number, frameLength : number, 
-            firstPayload : number, telegram : number[]) {
+            firstPayload : number, telegram : Uint8Array) {
             this._startCharacter = startCharacter
             this._frameLength = frameLength
             this._firstPayload = firstPayload
@@ -68,7 +68,7 @@ export namespace MeterbusLibFrames {
             return this._ciField
         }
 
-        constructor(telegram : number[]) {
+        constructor(telegram : Uint8Array) {
             super(0x68, (telegram[1] + 6), 4, telegram)
         }
 
@@ -98,7 +98,7 @@ export namespace MeterbusLibFrames {
             return this._address
         }
 
-        constructor(telegram : number[]) {
+        constructor(telegram : Uint8Array) {
             super(0x10, 5, 1, telegram)
         }
 
@@ -109,7 +109,7 @@ export namespace MeterbusLibFrames {
     }
 
     export class SingleCharFrame extends Frame {
-        constructor(telegram : number[]) {
+        constructor(telegram : Uint8Array) {
             super(0xe5, 1, 0, telegram)
         }
 

src/utils.ts

@@ -1,5 +1,5 @@
 export namespace MeterbusLibUtils {
-    export function bcd(data : number[]) : number {
+    export function bcd(data : Uint8Array) : number {
         let v : string = ""
         data.forEach((c : number) => {
             v += (c & 0xf0) >> 4
@@ -9,7 +9,7 @@ export namespace MeterbusLibUtils {
         return r
     }
 
-    export function manufCode(data : number[]) : string {
+    export function manufCode(data : Uint8Array) : string {
         let v : number = (data[1] << 8) + data[0]
         return String.fromCharCode((((v >> 10) & 0x1f) + 64), (((v >> 5) & 0x1f) + 64), ((v & 0x1f) + 64))
     }