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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
import {  CHAR_BACKWARD_SLASH,  CHAR_COLON,  CHAR_DOT,  CHAR_QUESTION_MARK,} from "../_common/constants.ts";import { isWindowsDeviceRoot } from "./_util.ts";import { resolve } from "./resolve.ts";
/** * Resolves path to a namespace path * @param path to resolve to namespace */export function toNamespacedPath(path: string): string {  // Note: this will *probably* throw somewhere.  if (typeof path !== "string") return path;  if (path.length === 0) return "";
  const resolvedPath = resolve(path);
  if (resolvedPath.length >= 3) {    if (resolvedPath.charCodeAt(0) === CHAR_BACKWARD_SLASH) {      // Possible UNC root
      if (resolvedPath.charCodeAt(1) === CHAR_BACKWARD_SLASH) {        const code = resolvedPath.charCodeAt(2);        if (code !== CHAR_QUESTION_MARK && code !== CHAR_DOT) {          // Matched non-long UNC root, convert the path to a long UNC path          return `\\\\?\\UNC\\${resolvedPath.slice(2)}`;        }      }    } else if (isWindowsDeviceRoot(resolvedPath.charCodeAt(0))) {      // Possible device root
      if (        resolvedPath.charCodeAt(1) === CHAR_COLON &&        resolvedPath.charCodeAt(2) === CHAR_BACKWARD_SLASH      ) {        // Matched device root, convert the path to a long UNC path        return `\\\\?\\${resolvedPath}`;      }    }  }
  return path;}