common.ts•1.38 kB
import { Address4 } from './ipv4';
import { Address6 } from './ipv6';
export interface ReverseFormOptions {
omitSuffix?: boolean;
}
export function isInSubnet(this: Address4 | Address6, address: Address4 | Address6) {
if (this.subnetMask < address.subnetMask) {
return false;
}
if (this.mask(address.subnetMask) === address.mask()) {
return true;
}
return false;
}
export function isCorrect(defaultBits: number) {
return function (this: Address4 | Address6) {
if (this.addressMinusSuffix !== this.correctForm()) {
return false;
}
if (this.subnetMask === defaultBits && !this.parsedSubnet) {
return true;
}
return this.parsedSubnet === String(this.subnetMask);
};
}
export function numberToPaddedHex(number: number) {
return number.toString(16).padStart(2, '0');
}
export function stringToPaddedHex(numberString: string) {
return numberToPaddedHex(parseInt(numberString, 10));
}
/**
* @param binaryValue Binary representation of a value (e.g. `10`)
* @param position Byte position, where 0 is the least significant bit
*/
export function testBit(binaryValue: string, position: number): boolean {
const { length } = binaryValue;
if (position > length) {
return false;
}
const positionInString = length - position;
return binaryValue.substring(positionInString, positionInString + 1) === '1';
}