Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 | 2x 31x 2x 8x 4x 1x 3x 1x 2x 2x 1x 6643x 6643x 6643x 44472x 44456x 44456x 44456x 1x 1x 1x 2x 2x 2x 9422x 9422x 9422x 9422x 37808x 37808x 37808x 9422x 6582x 6582x 6582x 6582x 6058x 6582x 2x 2x 2x 3x 3x 3x 4x 4x 4x 1x 1x 1x 1x 1x 1x 4x 4x 1x 3x 3x 33x 3x 5x 5x 5x 1x 1x 5x 5x 5x 48x 48x 48x 5x 2x 2x 2x 2x 2x 2x 2x 13x 2x 6x 6x 5x 5x 5x 115x 115x 115x 12x 12x 6x | import { IBufferReader } from './types';
export class BufferReader implements IBufferReader {
private _data: DataView;
private _position: number;
private _littleEndian: boolean;
get littleEndian(): boolean {
return this._littleEndian;
}
get length(): number {
return this._data.buffer.byteLength;
}
get bytesAvailable(): number {
return this.length - this._position;
}
get position(): number {
return this._position;
}
set position(value: number) {
if (value < 0) {
throw 'out of range';
} else if (value > this.length) {
throw 'out of range';
}
this._position = value;
}
get buffer(): ArrayBuffer {
return this._data.buffer;
}
get view(): DataView {
return this._data;
}
constructor(buffer: ArrayBuffer, littleEndian: boolean = false) {
this._data = new DataView(buffer);
this._position = 0;
this._littleEndian = littleEndian;
}
private movePosition(value: number) {
this._position += value;
}
// getUint8(): number {
// return this._data.getUint8(this._position);
// }
readUint8(): number {
const value = this._data.getUint8(this._position);
this.movePosition(1);
return value;
}
readUint16(): number {
const value = this._data.getUint16(this._position, this._littleEndian);
this.movePosition(2);
return value;
}
readUint32(): number {
const value = this._data.getUint32(this._position, this._littleEndian);
this.movePosition(4);
return value;
}
readUintVar(): number {
let value = 0;
let offset = 1;
let byte = 0;
do {
byte = this.readUint8();
value += (byte & 0x7f) * offset;
offset *= 128;
} while (byte & 0x80);
return value;
}
readIntVar(): number {
const byte = this.readUint8();
const sign = byte & 1 ? -1 : 1;
let value = (byte >>> 1) & 0x3f;
if (byte & 0x80) {
value += this.readUintVar() * 64;
}
return value * sign;
}
readInt8(): number {
const value = this._data.getInt8(this._position);
this.movePosition(1);
return value;
}
readInt16(): number {
const value = this._data.getInt16(this._position, this._littleEndian);
this.movePosition(2);
return value;
}
readInt32(): number {
const value = this._data.getInt32(this._position, this._littleEndian);
this.movePosition(4);
return value;
}
readFloat32(): number {
const value = this._data.getFloat32(this._position, this._littleEndian);
this.movePosition(4);
return value;
}
readFloat64(): number {
const value = this._data.getFloat64(this._position, this._littleEndian);
this.movePosition(8);
return value;
}
readString(): string {
let count = this.readUintVar();
if (!count) {
return '';
}
let value = '';
while (count--) {
value += String.fromCharCode(this.readUintVar());
}
return value;
}
readBigInt(): bigint {
let count = this.readIntVar();
let sign = 1n;
if (count < 0) {
count = -count;
sign = -1n;
}
let value = 0n;
let i = 0n;
while (count--) {
const byte = BigInt(this.readUint8());
value |= byte << i;
i += 8n;
}
return value * sign;
}
readBuffer(): ArrayBuffer {
const count = this.readUintVar();
const value = this._data.buffer.slice(
this._position,
this._position + count,
);
this.movePosition(value.byteLength);
return value;
}
readFlags(count: number): boolean[] {
const value = this.readUintVar();
const flags: boolean[] = [];
for (let i = 0; i < count; i++) {
flags.push(!!(value & (2 ** i)));
}
return flags;
}
readBitset(count: number): boolean[] {
const value: boolean[] = [];
if (count) {
let bitset = this.readUint8();
let position = 0;
while (count--) {
value.push(!!(bitset & (2 ** position)));
position++;
if (position === 8 && count) {
bitset = this.readUint8();
position = 0;
}
}
}
return value;
}
}
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