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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.// Copyright Joyent, Inc. and other Node contributors.//// Permission is hereby granted, free of charge, to any person obtaining a// copy of this software and associated documentation files (the// "Software"), to deal in the Software without restriction, including// without limitation the rights to use, copy, modify, merge, publish,// distribute, sublicense, and/or sell copies of the Software, and to permit// persons to whom the Software is furnished to do so, subject to the// following conditions://// The above copyright notice and this permission notice shall be included// in all copies or substantial portions of the Software.//// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE// USE OR OTHER DEALINGS IN THE SOFTWARE.
import { getOptionValue } from "../internal/options.ts";import { emitWarning } from "../process.ts";import {  AI_ADDRCONFIG,  AI_ALL,  AI_V4MAPPED,} from "../internal_binding/cares_wrap.ts";import { ERR_INVALID_ARG_VALUE } from "../internal/errors.ts";
export function validateHints(hints: number) {  if ((hints & ~(AI_ADDRCONFIG | AI_ALL | AI_V4MAPPED)) !== 0) {    throw new ERR_INVALID_ARG_VALUE("hints", hints, "is invalid");  }}
let invalidHostnameWarningEmitted = false;
export function emitInvalidHostnameWarning(hostname: string) {  if (invalidHostnameWarningEmitted) {    return;  }
  invalidHostnameWarningEmitted = true;
  emitWarning(    `The provided hostname "${hostname}" is not a valid ` +      "hostname, and is supported in the dns module solely for compatibility.",    "DeprecationWarning",    "DEP0118",  );}
const dnsOrder = getOptionValue("--dns-result-order") || "ipv4first";
export function getDefaultVerbatim() {  switch (dnsOrder) {    case "verbatim": {      return true;    }    case "ipv4first": {      return false;    }    default: {      return false;    }  }}