67 lines
1.8 KiB
TypeScript
67 lines
1.8 KiB
TypeScript
DataView.prototype.add = function (offset) {
|
|
return new DataView(this.buffer, offset + this.byteOffset);
|
|
};
|
|
DataView.prototype.writeU8 = function (val) {
|
|
return this.setUint8(0, val);
|
|
};
|
|
DataView.prototype.writeU16 = function (val) {
|
|
return this.setUint16(0, val);
|
|
};
|
|
DataView.prototype.writeU32 = function (val) {
|
|
return this.setUint32(0, val);
|
|
};
|
|
DataView.prototype.writeU64 = function (val) {
|
|
return this.setBigUint64(0, val);
|
|
};
|
|
DataView.prototype.readU8 = function () {
|
|
return this.getUint8(0);
|
|
};
|
|
DataView.prototype.readU16 = function () {
|
|
return this.getUint16(0);
|
|
};
|
|
DataView.prototype.readU32 = function () {
|
|
return this.getUint32(0);
|
|
};
|
|
DataView.prototype.readU64 = function () {
|
|
return this.getBigUint64(0);
|
|
};
|
|
const isU8Array = (x: Uint8Array | number[]): x is Uint8Array => {
|
|
return x instanceof Uint8Array;
|
|
};
|
|
|
|
DataView.prototype.writeByteArray = function (arr) {
|
|
const len = isU8Array(arr) ? arr.byteLength : arr.length;
|
|
for (let i = 0; i < len; i++) {
|
|
this.setUint8(i, arr[i]);
|
|
}
|
|
};
|
|
DataView.prototype.readByteArray = function (len) {
|
|
let ret = new DataView(new ArrayBuffer(len));
|
|
for (let i = 0; i < len; i++) {
|
|
ret.setUint8(i, this.getUint8(i));
|
|
}
|
|
return ret;
|
|
};
|
|
DataView.prototype.readString = function (len) {
|
|
const ba = this.readByteArray(len);
|
|
return String.fromCharCode.apply(null, new Uint8Array(ba.buffer));
|
|
};
|
|
|
|
declare global {
|
|
interface DataView {
|
|
add(offset: number): DataView;
|
|
readByteArray(len: number): DataView;
|
|
readString(len: number): string;
|
|
readU16(): number;
|
|
readU32(): number;
|
|
readU64(): number;
|
|
readU8(): number;
|
|
writeByteArray(arr: Uint8Array | number[]): undefined;
|
|
writeU16(n: number): undefined;
|
|
writeU32(n: number): undefined;
|
|
writeU64(n: number): undefined;
|
|
writeU8(n: number): undefined;
|
|
}
|
|
}
|
|
export default global;
|