67 lines
No EOL
2.2 KiB
JavaScript
67 lines
No EOL
2.2 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.isInSubnet = isInSubnet;
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exports.isCorrect = isCorrect;
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exports.prefixLengthFromMask = prefixLengthFromMask;
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exports.numberToPaddedHex = numberToPaddedHex;
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exports.stringToPaddedHex = stringToPaddedHex;
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exports.testBit = testBit;
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const address_error_1 = require("./address-error");
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function isInSubnet(address) {
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if (this.subnetMask < address.subnetMask) {
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return false;
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}
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if (this.mask(address.subnetMask) === address.mask()) {
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return true;
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}
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return false;
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}
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function isCorrect(defaultBits) {
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return function () {
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if (this.addressMinusSuffix !== this.correctForm()) {
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return false;
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}
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if (this.subnetMask === defaultBits && !this.parsedSubnet) {
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return true;
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}
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return this.parsedSubnet === String(this.subnetMask);
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};
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}
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/**
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* Returns the prefix length (number of leading 1 bits) of a contiguous
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* subnet mask. Throws `AddressError` if the mask is non-contiguous (e.g.
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* `255.0.255.0`).
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*/
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function prefixLengthFromMask(value, totalBits) {
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const binary = value.toString(2).padStart(totalBits, '0');
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if (binary.length > totalBits) {
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throw new address_error_1.AddressError('Invalid subnet mask.');
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}
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const firstZero = binary.indexOf('0');
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if (firstZero === -1) {
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return totalBits;
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}
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if (binary.slice(firstZero).includes('1')) {
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throw new address_error_1.AddressError('Invalid subnet mask.');
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}
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return firstZero;
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}
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function numberToPaddedHex(number) {
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return number.toString(16).padStart(2, '0');
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}
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function stringToPaddedHex(numberString) {
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return numberToPaddedHex(parseInt(numberString, 10));
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}
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/**
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* @param binaryValue Binary representation of a value (e.g. `10`)
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* @param position Byte position, where 0 is the least significant bit
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*/
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function testBit(binaryValue, position) {
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const { length } = binaryValue;
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if (position > length) {
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return false;
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}
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const positionInString = length - position;
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return binaryValue.substring(positionInString, positionInString + 1) === '1';
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}
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//# sourceMappingURL=common.js.map
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