cbor2/lib/writer.js

Encode and parse data in the Concise Binary Object Representation (CBOR) data format (RFC8949).

class e{static defaultOptions={chunkSize:4096};#r;#i=[];#s=null;#t=0;#a=0;constructor(t={}){if(this.#r={...e.defaultOptions,...t},this.#r.chunkSize<8)throw new RangeError(`Expected size >= 8, got ${this.#r.chunkSize}`);this.#n()}get length(){return this.#a}read(){this.#o();const t=new Uint8Array(this.#a);let i=0;for(const s of this.#i)t.set(s,i),i+=s.length;return this.#n(),t}write(t){const i=t.length;i>this.#l()?(this.#o(),i>this.#r.chunkSize?(this.#i.push(t),this.#n()):(this.#n(),this.#i[this.#i.length-1].set(t),this.#t=i)):(this.#i[this.#i.length-1].set(t,this.#t),this.#t+=i),this.#a+=i}writeUint8(t){this.#e(1),this.#s.setUint8(this.#t,t),this.#h(1)}writeUint16(t,i=!1){this.#e(2),this.#s.setUint16(this.#t,t,i),this.#h(2)}writeUint32(t,i=!1){this.#e(4),this.#s.setUint32(this.#t,t,i),this.#h(4)}writeBigUint64(t,i=!1){this.#e(8),this.#s.setBigUint64(this.#t,t,i),this.#h(8)}writeInt16(t,i=!1){this.#e(2),this.#s.setInt16(this.#t,t,i),this.#h(2)}writeInt32(t,i=!1){this.#e(4),this.#s.setInt32(this.#t,t,i),this.#h(4)}writeBigInt64(t,i=!1){this.#e(8),this.#s.setBigInt64(this.#t,t,i),this.#h(8)}writeFloat32(t,i=!1){this.#e(4),this.#s.setFloat32(this.#t,t,i),this.#h(4)}writeFloat64(t,i=!1){this.#e(8),this.#s.setFloat64(this.#t,t,i),this.#h(8)}clear(){this.#a=0,this.#i=[],this.#n()}#n(){const t=new Uint8Array(this.#r.chunkSize);this.#i.push(t),this.#t=0,this.#s=new DataView(t.buffer,t.byteOffset,t.byteLength)}#o(){if(this.#t===0){this.#i.pop();return}const t=this.#i.length-1;this.#i[t]=this.#i[t].subarray(0,this.#t),this.#t=0,this.#s=null}#l(){const t=this.#i.length-1;return this.#i[t].length-this.#t}#e(t){this.#l()<t&&(this.#o(),this.#n())}#h(t){this.#t+=t,this.#a+=t}}export{e as Writer};