108 lines
2.2 KiB
TypeScript
108 lines
2.2 KiB
TypeScript
export class BinaryWriter
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{
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private _buffer: Uint8Array;
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private _position: number;
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constructor()
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{
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this._buffer = new Uint8Array();
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this._position = 0;
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}
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public writeByte(byte: number): BinaryWriter
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{
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const array = new Uint8Array(1);
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array[0] = byte;
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this.appendArray(array);
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return this;
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}
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public writeBytes(bytes: ArrayBuffer | number[]): BinaryWriter
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{
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const array = new Uint8Array(bytes);
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this.appendArray(array);
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return this;
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}
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public writeShort(short: number): BinaryWriter
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{
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const array = new Uint8Array(2);
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array[0] = short >> 8;
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array[1] = short & 0xFF;
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this.appendArray(array);
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return this;
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}
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public writeInt(integer: number): BinaryWriter
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{
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const array = new Uint8Array(4);
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array[0] = integer >> 24;
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array[1] = integer >> 16;
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array[2] = integer >> 8;
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array[3] = integer & 0xFF;
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this.appendArray(array);
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return this;
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}
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public writeString(string: string, includeLength: boolean = true): BinaryWriter
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{
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const array = new TextEncoder().encode(string);
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if(includeLength)
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{
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this.writeShort(array.length);
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this.appendArray(array);
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}
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else
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{
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this.appendArray(array);
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}
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return this;
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}
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private appendArray(array: Uint8Array): void
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{
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if(!array) return;
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const mergedArray = new Uint8Array( ((this.position + array.length) > this._buffer.length) ? (this.position + array.length) : this._buffer.length);
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mergedArray.set(this._buffer);
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mergedArray.set(array, this.position);
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this._buffer = mergedArray;
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this.position += array.length;
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}
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public getBuffer(): ArrayBuffer
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{
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return this._buffer.buffer;
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}
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public get position(): number
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{
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return this._position;
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}
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public set position(pos: number)
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{
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this._position = pos;
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}
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public toString(encoding?: string): string
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{
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return new TextDecoder(encoding).decode(this._buffer);
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}
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}
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