| 39 | } |
| 40 | |
| 41 | reset(ab: Uint8Array) { |
| 42 | this.platformBuffer = fromUint8Array(ab); |
| 43 | this.byteLength = this.platformBuffer.byteLength; |
| 44 | // Reuse DataView when the underlying ArrayBuffer, byteOffset, and byteLength are unchanged. |
| 45 | const buf = this.platformBuffer.buffer; |
| 46 | if ( |
| 47 | buf !== this.cachedArrayBuffer |
| 48 | || !this.dataView |
| 49 | || this.dataView.byteOffset !== this.platformBuffer.byteOffset |
| 50 | || this.dataView.byteLength !== this.byteLength |
| 51 | ) { |
| 52 | this.dataView = new DataView( |
| 53 | buf, |
| 54 | this.platformBuffer.byteOffset, |
| 55 | this.byteLength, |
| 56 | ); |
| 57 | this.cachedArrayBuffer = buf; |
| 58 | } |
| 59 | if (this.sliceStringEnable) { |
| 60 | this.bigString = this.platformBuffer.toString( |
| 61 | "latin1", |
| 62 | 0, |
| 63 | this.byteLength, |
| 64 | ); |
| 65 | } |
| 66 | this.cursor = 0; |
| 67 | } |
| 68 | |
| 69 | readUint8() { |
| 70 | return this.dataView.getUint8(this.cursor++); |