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Punycode v2.0.0 drops support for old and non-Node environments. PR-URL: https://github.com/nodejs/node/pull/7267 Fixes: https://github.com/nodejs/node/issues/7224 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Roman Reiss <me@silverwind.io>v7.x
committed by
silverwind
2 changed files with 389 additions and 479 deletions
@ -1,530 +1,440 @@ |
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/*! https://mths.be/punycode v1.3.2 by @mathias */ |
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;(function(root) { |
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|
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/** Detect free variables */ |
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var freeExports = typeof exports == 'object' && exports && |
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!exports.nodeType && exports; |
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var freeModule = typeof module == 'object' && module && |
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!module.nodeType && module; |
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var freeGlobal = typeof global == 'object' && global; |
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if ( |
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freeGlobal.global === freeGlobal || |
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freeGlobal.window === freeGlobal || |
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freeGlobal.self === freeGlobal |
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) { |
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root = freeGlobal; |
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'use strict'; |
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|
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/** Highest positive signed 32-bit float value */ |
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const maxInt = 2147483647; // aka. 0x7FFFFFFF or 2^31-1
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|
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/** Bootstring parameters */ |
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const base = 36; |
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const tMin = 1; |
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const tMax = 26; |
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const skew = 38; |
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const damp = 700; |
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const initialBias = 72; |
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const initialN = 128; // 0x80
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const delimiter = '-'; // '\x2D'
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|
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/** Regular expressions */ |
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const regexPunycode = /^xn--/; |
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const regexNonASCII = /[^\x20-\x7E]/; // unprintable ASCII chars + non-ASCII chars
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const regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g; // RFC 3490 separators
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|
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/** Error messages */ |
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const errors = { |
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'overflow': 'Overflow: input needs wider integers to process', |
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'not-basic': 'Illegal input >= 0x80 (not a basic code point)', |
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'invalid-input': 'Invalid input' |
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}; |
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|
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/** Convenience shortcuts */ |
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const baseMinusTMin = base - tMin; |
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const floor = Math.floor; |
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const stringFromCharCode = String.fromCharCode; |
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|
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/*--------------------------------------------------------------------------*/ |
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|
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/** |
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* A generic error utility function. |
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* @private |
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* @param {String} type The error type. |
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* @returns {Error} Throws a `RangeError` with the applicable error message. |
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*/ |
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function error(type) { |
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throw new RangeError(errors[type]); |
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} |
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|
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/** |
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* A generic `Array#map` utility function. |
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* @private |
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* @param {Array} array The array to iterate over. |
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* @param {Function} callback The function that gets called for every array |
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* item. |
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* @returns {Array} A new array of values returned by the callback function. |
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*/ |
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function map(array, fn) { |
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const result = []; |
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let length = array.length; |
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while (length--) { |
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result[length] = fn(array[length]); |
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} |
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|
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/** |
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* The `punycode` object. |
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* @name punycode |
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* @type Object |
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*/ |
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var punycode, |
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|
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/** Highest positive signed 32-bit float value */ |
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maxInt = 2147483647, // aka. 0x7FFFFFFF or 2^31-1
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|
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/** Bootstring parameters */ |
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base = 36, |
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tMin = 1, |
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tMax = 26, |
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skew = 38, |
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damp = 700, |
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initialBias = 72, |
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initialN = 128, // 0x80
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delimiter = '-', // '\x2D'
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|
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/** Regular expressions */ |
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regexPunycode = /^xn--/, |
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regexNonASCII = /[^\x20-\x7E]/, // unprintable ASCII chars + non-ASCII chars
|
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regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g, // RFC 3490 separators
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|
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/** Error messages */ |
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errors = { |
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'overflow': 'Overflow: input needs wider integers to process', |
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'not-basic': 'Illegal input >= 0x80 (not a basic code point)', |
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'invalid-input': 'Invalid input' |
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}, |
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|
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/** Convenience shortcuts */ |
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baseMinusTMin = base - tMin, |
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floor = Math.floor, |
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stringFromCharCode = String.fromCharCode, |
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|
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/** Temporary variable */ |
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key; |
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|
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/*--------------------------------------------------------------------------*/ |
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|
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/** |
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* A generic error utility function. |
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* @private |
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* @param {String} type The error type. |
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* @returns {Error} Throws a `RangeError` with the applicable error message. |
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*/ |
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function error(type) { |
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throw new RangeError(errors[type]); |
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return result; |
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} |
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|
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/** |
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* A simple `Array#map`-like wrapper to work with domain name strings or email |
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* addresses. |
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* @private |
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* @param {String} domain The domain name or email address. |
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* @param {Function} callback The function that gets called for every |
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* character. |
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* @returns {Array} A new string of characters returned by the callback |
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* function. |
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*/ |
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function mapDomain(string, fn) { |
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const parts = string.split('@'); |
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let result = ''; |
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if (parts.length > 1) { |
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// In email addresses, only the domain name should be punycoded. Leave
|
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// the local part (i.e. everything up to `@`) intact.
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result = parts[0] + '@'; |
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string = parts[1]; |
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} |
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|
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/** |
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* A generic `Array#map` utility function. |
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* @private |
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* @param {Array} array The array to iterate over. |
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* @param {Function} callback The function that gets called for every array |
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* item. |
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* @returns {Array} A new array of values returned by the callback function. |
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*/ |
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function map(array, fn) { |
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var length = array.length; |
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var result = []; |
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while (length--) { |
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result[length] = fn(array[length]); |
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} |
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return result; |
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} |
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|
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/** |
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* A simple `Array#map`-like wrapper to work with domain name strings or email |
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* addresses. |
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* @private |
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* @param {String} domain The domain name or email address. |
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* @param {Function} callback The function that gets called for every |
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* character. |
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* @returns {Array} A new string of characters returned by the callback |
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* function. |
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*/ |
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function mapDomain(string, fn) { |
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var parts = string.split('@'); |
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var result = ''; |
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if (parts.length > 1) { |
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// In email addresses, only the domain name should be punycoded. Leave
|
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// the local part (i.e. everything up to `@`) intact.
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result = parts[0] + '@'; |
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string = parts[1]; |
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} |
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// Avoid `split(regex)` for IE8 compatibility. See #17.
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string = string.replace(regexSeparators, '\x2E'); |
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var labels = string.split('.'); |
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var encoded = map(labels, fn).join('.'); |
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return result + encoded; |
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} |
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|
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/** |
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* Creates an array containing the numeric code points of each Unicode |
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* character in the string. While JavaScript uses UCS-2 internally, |
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* this function will convert a pair of surrogate halves (each of which |
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* UCS-2 exposes as separate characters) into a single code point, |
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* matching UTF-16. |
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* @see `punycode.ucs2.encode` |
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* @see <https://mathiasbynens.be/notes/javascript-encoding>
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* @memberOf punycode.ucs2 |
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* @name decode |
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* @param {String} string The Unicode input string (UCS-2). |
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* @returns {Array} The new array of code points. |
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*/ |
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function ucs2decode(string) { |
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var output = [], |
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counter = 0, |
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length = string.length, |
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value, |
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extra; |
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while (counter < length) { |
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value = string.charCodeAt(counter++); |
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if (value >= 0xD800 && value <= 0xDBFF && counter < length) { |
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// high surrogate, and there is a next character
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extra = string.charCodeAt(counter++); |
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if ((extra & 0xFC00) == 0xDC00) { // low surrogate
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output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000); |
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} else { |
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// unmatched surrogate; only append this code unit, in case the next
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// code unit is the high surrogate of a surrogate pair
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output.push(value); |
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counter--; |
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} |
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// Avoid `split(regex)` for IE8 compatibility. See #17.
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string = string.replace(regexSeparators, '\x2E'); |
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const labels = string.split('.'); |
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const encoded = map(labels, fn).join('.'); |
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return result + encoded; |
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} |
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|
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/** |
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* Creates an array containing the numeric code points of each Unicode |
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* character in the string. While JavaScript uses UCS-2 internally, |
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* this function will convert a pair of surrogate halves (each of which |
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* UCS-2 exposes as separate characters) into a single code point, |
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* matching UTF-16. |
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* @see `punycode.ucs2.encode` |
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* @see <https://mathiasbynens.be/notes/javascript-encoding>
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* @memberOf punycode.ucs2 |
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* @name decode |
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* @param {String} string The Unicode input string (UCS-2). |
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* @returns {Array} The new array of code points. |
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*/ |
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function ucs2decode(string) { |
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const output = []; |
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let counter = 0; |
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const length = string.length; |
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while (counter < length) { |
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const value = string.charCodeAt(counter++); |
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if (value >= 0xD800 && value <= 0xDBFF && counter < length) { |
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// It's a high surrogate, and there is a next character.
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const extra = string.charCodeAt(counter++); |
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if ((extra & 0xFC00) == 0xDC00) { // Low surrogate.
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output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000); |
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} else { |
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// It's an unmatched surrogate; only append this code unit, in case the
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// next code unit is the high surrogate of a surrogate pair.
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output.push(value); |
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counter--; |
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} |
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} else { |
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output.push(value); |
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} |
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return output; |
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} |
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|
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/** |
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* Creates a string based on an array of numeric code points. |
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* @see `punycode.ucs2.decode` |
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* @memberOf punycode.ucs2 |
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* @name encode |
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* @param {Array} codePoints The array of numeric code points. |
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* @returns {String} The new Unicode string (UCS-2). |
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*/ |
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function ucs2encode(array) { |
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return map(array, function(value) { |
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var output = ''; |
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if (value > 0xFFFF) { |
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value -= 0x10000; |
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output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800); |
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value = 0xDC00 | value & 0x3FF; |
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} |
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output += stringFromCharCode(value); |
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return output; |
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}).join(''); |
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return output; |
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} |
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|
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/** |
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* Creates a string based on an array of numeric code points. |
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* @see `punycode.ucs2.decode` |
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* @memberOf punycode.ucs2 |
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* @name encode |
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* @param {Array} codePoints The array of numeric code points. |
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* @returns {String} The new Unicode string (UCS-2). |
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*/ |
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const ucs2encode = array => String.fromCodePoint(...array); |
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/** |
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* Converts a basic code point into a digit/integer. |
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* @see `digitToBasic()` |
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* @private |
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* @param {Number} codePoint The basic numeric code point value. |
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* @returns {Number} The numeric value of a basic code point (for use in |
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* representing integers) in the range `0` to `base - 1`, or `base` if |
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* the code point does not represent a value. |
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*/ |
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const basicToDigit = function(codePoint) { |
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if (codePoint - 0x30 < 0x0A) { |
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return codePoint - 0x16; |
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} |
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|
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/** |
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* Converts a basic code point into a digit/integer. |
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* @see `digitToBasic()` |
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* @private |
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* @param {Number} codePoint The basic numeric code point value. |
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* @returns {Number} The numeric value of a basic code point (for use in |
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* representing integers) in the range `0` to `base - 1`, or `base` if |
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* the code point does not represent a value. |
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*/ |
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function basicToDigit(codePoint) { |
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if (codePoint - 48 < 10) { |
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return codePoint - 22; |
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} |
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if (codePoint - 65 < 26) { |
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return codePoint - 65; |
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} |
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if (codePoint - 97 < 26) { |
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return codePoint - 97; |
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} |
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return base; |
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if (codePoint - 0x41 < 0x1A) { |
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return codePoint - 0x41; |
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} |
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|
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/** |
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* Converts a digit/integer into a basic code point. |
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* @see `basicToDigit()` |
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* @private |
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* @param {Number} digit The numeric value of a basic code point. |
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* @returns {Number} The basic code point whose value (when used for |
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* representing integers) is `digit`, which needs to be in the range |
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* `0` to `base - 1`. If `flag` is non-zero, the uppercase form is |
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* used; else, the lowercase form is used. The behavior is undefined |
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* if `flag` is non-zero and `digit` has no uppercase form. |
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*/ |
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function digitToBasic(digit, flag) { |
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// 0..25 map to ASCII a..z or A..Z
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// 26..35 map to ASCII 0..9
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return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5); |
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if (codePoint - 0x61 < 0x1A) { |
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return codePoint - 0x61; |
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} |
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|
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/** |
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* Bias adaptation function as per section 3.4 of RFC 3492. |
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* https://tools.ietf.org/html/rfc3492#section-3.4
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* @private |
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*/ |
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function adapt(delta, numPoints, firstTime) { |
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var k = 0; |
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delta = firstTime ? floor(delta / damp) : delta >> 1; |
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delta += floor(delta / numPoints); |
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for (/* no initialization */; delta > baseMinusTMin * tMax >> 1; k += base) { |
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delta = floor(delta / baseMinusTMin); |
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} |
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return floor(k + (baseMinusTMin + 1) * delta / (delta + skew)); |
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return base; |
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}; |
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|
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/** |
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* Converts a digit/integer into a basic code point. |
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* @see `basicToDigit()` |
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* @private |
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* @param {Number} digit The numeric value of a basic code point. |
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* @returns {Number} The basic code point whose value (when used for |
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* representing integers) is `digit`, which needs to be in the range |
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* `0` to `base - 1`. If `flag` is non-zero, the uppercase form is |
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* used; else, the lowercase form is used. The behavior is undefined |
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* if `flag` is non-zero and `digit` has no uppercase form. |
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*/ |
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const digitToBasic = function(digit, flag) { |
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// 0..25 map to ASCII a..z or A..Z
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// 26..35 map to ASCII 0..9
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return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5); |
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}; |
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|
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/** |
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* Bias adaptation function as per section 3.4 of RFC 3492. |
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* https://tools.ietf.org/html/rfc3492#section-3.4
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* @private |
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*/ |
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const adapt = function(delta, numPoints, firstTime) { |
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let k = 0; |
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delta = firstTime ? floor(delta / damp) : delta >> 1; |
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delta += floor(delta / numPoints); |
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for (/* no initialization */; delta > baseMinusTMin * tMax >> 1; k += base) { |
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delta = floor(delta / baseMinusTMin); |
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} |
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return floor(k + (baseMinusTMin + 1) * delta / (delta + skew)); |
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}; |
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|
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/** |
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* Converts a Punycode string of ASCII-only symbols to a string of Unicode |
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* symbols. |
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* @memberOf punycode |
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* @param {String} input The Punycode string of ASCII-only symbols. |
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* @returns {String} The resulting string of Unicode symbols. |
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*/ |
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const decode = function(input) { |
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// Don't use UCS-2.
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const output = []; |
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const inputLength = input.length; |
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let i = 0; |
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let n = initialN; |
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let bias = initialBias; |
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|
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// Handle the basic code points: let `basic` be the number of input code
|
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// points before the last delimiter, or `0` if there is none, then copy
|
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// the first basic code points to the output.
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|
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let basic = input.lastIndexOf(delimiter); |
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if (basic < 0) { |
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basic = 0; |
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} |
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|
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/** |
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* Converts a Punycode string of ASCII-only symbols to a string of Unicode |
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* symbols. |
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* @memberOf punycode |
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* @param {String} input The Punycode string of ASCII-only symbols. |
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* @returns {String} The resulting string of Unicode symbols. |
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*/ |
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function decode(input) { |
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// Don't use UCS-2
|
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var output = [], |
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inputLength = input.length, |
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out, |
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i = 0, |
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n = initialN, |
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bias = initialBias, |
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basic, |
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j, |
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index, |
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oldi, |
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w, |
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k, |
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digit, |
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t, |
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/** Cached calculation results */ |
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baseMinusT; |
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|
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// Handle the basic code points: let `basic` be the number of input code
|
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// points before the last delimiter, or `0` if there is none, then copy
|
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// the first basic code points to the output.
|
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|
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basic = input.lastIndexOf(delimiter); |
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if (basic < 0) { |
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basic = 0; |
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} |
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|
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for (j = 0; j < basic; ++j) { |
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// if it's not a basic code point
|
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if (input.charCodeAt(j) >= 0x80) { |
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error('not-basic'); |
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} |
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output.push(input.charCodeAt(j)); |
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for (let j = 0; j < basic; ++j) { |
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// if it's not a basic code point
|
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if (input.charCodeAt(j) >= 0x80) { |
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error('not-basic'); |
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} |
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output.push(input.charCodeAt(j)); |
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} |
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|
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// Main decoding loop: start just after the last delimiter if any basic code
|
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// points were copied; start at the beginning otherwise.
|
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|
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for (index = basic > 0 ? basic + 1 : 0; index < inputLength; /* no final expression */) { |
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|
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// `index` is the index of the next character to be consumed.
|
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// Decode a generalized variable-length integer into `delta`,
|
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// which gets added to `i`. The overflow checking is easier
|
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// if we increase `i` as we go, then subtract off its starting
|
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// value at the end to obtain `delta`.
|
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for (oldi = i, w = 1, k = base; /* no condition */; k += base) { |
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|
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if (index >= inputLength) { |
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error('invalid-input'); |
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} |
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// Main decoding loop: start just after the last delimiter if any basic code
|
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// points were copied; start at the beginning otherwise.
|
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|
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digit = basicToDigit(input.charCodeAt(index++)); |
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for (let index = basic > 0 ? basic + 1 : 0; index < inputLength; /* no final expression */) { |
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|
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if (digit >= base || digit > floor((maxInt - i) / w)) { |
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error('overflow'); |
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} |
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// `index` is the index of the next character to be consumed.
|
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// Decode a generalized variable-length integer into `delta`,
|
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// which gets added to `i`. The overflow checking is easier
|
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// if we increase `i` as we go, then subtract off its starting
|
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// value at the end to obtain `delta`.
|
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let oldi = i; |
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for (let w = 1, k = base; /* no condition */; k += base) { |
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|
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i += digit * w; |
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t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias); |
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if (index >= inputLength) { |
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error('invalid-input'); |
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} |
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|
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if (digit < t) { |
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break; |
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} |
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const digit = basicToDigit(input.charCodeAt(index++)); |
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|
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baseMinusT = base - t; |
|||
if (w > floor(maxInt / baseMinusT)) { |
|||
error('overflow'); |
|||
} |
|||
if (digit >= base || digit > floor((maxInt - i) / w)) { |
|||
error('overflow'); |
|||
} |
|||
|
|||
w *= baseMinusT; |
|||
i += digit * w; |
|||
const t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias); |
|||
|
|||
if (digit < t) { |
|||
break; |
|||
} |
|||
|
|||
out = output.length + 1; |
|||
bias = adapt(i - oldi, out, oldi == 0); |
|||
|
|||
// `i` was supposed to wrap around from `out` to `0`,
|
|||
// incrementing `n` each time, so we'll fix that now:
|
|||
if (floor(i / out) > maxInt - n) { |
|||
const baseMinusT = base - t; |
|||
if (w > floor(maxInt / baseMinusT)) { |
|||
error('overflow'); |
|||
} |
|||
|
|||
n += floor(i / out); |
|||
i %= out; |
|||
|
|||
// Insert `n` at position `i` of the output
|
|||
output.splice(i++, 0, n); |
|||
w *= baseMinusT; |
|||
|
|||
} |
|||
|
|||
return ucs2encode(output); |
|||
} |
|||
const out = output.length + 1; |
|||
bias = adapt(i - oldi, out, oldi == 0); |
|||
|
|||
/** |
|||
* Converts a string of Unicode symbols (e.g. a domain name label) to a |
|||
* Punycode string of ASCII-only symbols. |
|||
* @memberOf punycode |
|||
* @param {String} input The string of Unicode symbols. |
|||
* @returns {String} The resulting Punycode string of ASCII-only symbols. |
|||
*/ |
|||
function encode(input) { |
|||
var n, |
|||
delta, |
|||
handledCPCount, |
|||
basicLength, |
|||
bias, |
|||
j, |
|||
m, |
|||
q, |
|||
k, |
|||
t, |
|||
currentValue, |
|||
output = [], |
|||
/** `inputLength` will hold the number of code points in `input`. */ |
|||
inputLength, |
|||
/** Cached calculation results */ |
|||
handledCPCountPlusOne, |
|||
baseMinusT, |
|||
qMinusT; |
|||
|
|||
// Convert the input in UCS-2 to Unicode
|
|||
input = ucs2decode(input); |
|||
|
|||
// Cache the length
|
|||
inputLength = input.length; |
|||
|
|||
// Initialize the state
|
|||
n = initialN; |
|||
delta = 0; |
|||
bias = initialBias; |
|||
|
|||
// Handle the basic code points
|
|||
for (j = 0; j < inputLength; ++j) { |
|||
currentValue = input[j]; |
|||
if (currentValue < 0x80) { |
|||
output.push(stringFromCharCode(currentValue)); |
|||
} |
|||
// `i` was supposed to wrap around from `out` to `0`,
|
|||
// incrementing `n` each time, so we'll fix that now:
|
|||
if (floor(i / out) > maxInt - n) { |
|||
error('overflow'); |
|||
} |
|||
|
|||
handledCPCount = basicLength = output.length; |
|||
n += floor(i / out); |
|||
i %= out; |
|||
|
|||
// `handledCPCount` is the number of code points that have been handled;
|
|||
// `basicLength` is the number of basic code points.
|
|||
// Insert `n` at position `i` of the output.
|
|||
output.splice(i++, 0, n); |
|||
|
|||
// Finish the basic string - if it is not empty - with a delimiter
|
|||
if (basicLength) { |
|||
output.push(delimiter); |
|||
} |
|||
|
|||
return String.fromCodePoint(...output); |
|||
}; |
|||
|
|||
/** |
|||
* Converts a string of Unicode symbols (e.g. a domain name label) to a |
|||
* Punycode string of ASCII-only symbols. |
|||
* @memberOf punycode |
|||
* @param {String} input The string of Unicode symbols. |
|||
* @returns {String} The resulting Punycode string of ASCII-only symbols. |
|||
*/ |
|||
const encode = function(input) { |
|||
const output = []; |
|||
|
|||
// Convert the input in UCS-2 to an array of Unicode code points.
|
|||
input = ucs2decode(input); |
|||
|
|||
// Cache the length.
|
|||
let inputLength = input.length; |
|||
|
|||
// Initialize the state.
|
|||
let n = initialN; |
|||
let delta = 0; |
|||
let bias = initialBias; |
|||
|
|||
// Handle the basic code points.
|
|||
for (const currentValue of input) { |
|||
if (currentValue < 0x80) { |
|||
output.push(stringFromCharCode(currentValue)); |
|||
} |
|||
} |
|||
|
|||
// Main encoding loop:
|
|||
while (handledCPCount < inputLength) { |
|||
let basicLength = output.length; |
|||
let handledCPCount = basicLength; |
|||
|
|||
// All non-basic code points < n have been handled already. Find the next
|
|||
// larger one:
|
|||
for (m = maxInt, j = 0; j < inputLength; ++j) { |
|||
currentValue = input[j]; |
|||
if (currentValue >= n && currentValue < m) { |
|||
m = currentValue; |
|||
} |
|||
} |
|||
// `handledCPCount` is the number of code points that have been handled;
|
|||
// `basicLength` is the number of basic code points.
|
|||
|
|||
// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,
|
|||
// but guard against overflow
|
|||
handledCPCountPlusOne = handledCPCount + 1; |
|||
if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) { |
|||
error('overflow'); |
|||
} |
|||
// Finish the basic string with a delimiter unless it's empty.
|
|||
if (basicLength) { |
|||
output.push(delimiter); |
|||
} |
|||
|
|||
delta += (m - n) * handledCPCountPlusOne; |
|||
n = m; |
|||
// Main encoding loop:
|
|||
while (handledCPCount < inputLength) { |
|||
|
|||
for (j = 0; j < inputLength; ++j) { |
|||
currentValue = input[j]; |
|||
// All non-basic code points < n have been handled already. Find the next
|
|||
// larger one:
|
|||
let m = maxInt; |
|||
for (const currentValue of input) { |
|||
if (currentValue >= n && currentValue < m) { |
|||
m = currentValue; |
|||
} |
|||
} |
|||
|
|||
if (currentValue < n && ++delta > maxInt) { |
|||
error('overflow'); |
|||
} |
|||
// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,
|
|||
// but guard against overflow.
|
|||
const handledCPCountPlusOne = handledCPCount + 1; |
|||
if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) { |
|||
error('overflow'); |
|||
} |
|||
|
|||
if (currentValue == n) { |
|||
// Represent delta as a generalized variable-length integer
|
|||
for (q = delta, k = base; /* no condition */; k += base) { |
|||
t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias); |
|||
if (q < t) { |
|||
break; |
|||
} |
|||
qMinusT = q - t; |
|||
baseMinusT = base - t; |
|||
output.push( |
|||
stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0)) |
|||
); |
|||
q = floor(qMinusT / baseMinusT); |
|||
} |
|||
delta += (m - n) * handledCPCountPlusOne; |
|||
n = m; |
|||
|
|||
output.push(stringFromCharCode(digitToBasic(q, 0))); |
|||
bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength); |
|||
delta = 0; |
|||
++handledCPCount; |
|||
for (const currentValue of input) { |
|||
if (currentValue < n && ++delta > maxInt) { |
|||
error('overflow'); |
|||
} |
|||
if (currentValue == n) { |
|||
// Represent delta as a generalized variable-length integer.
|
|||
let q = delta; |
|||
for (let k = base; /* no condition */; k += base) { |
|||
const t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias); |
|||
if (q < t) { |
|||
break; |
|||
} |
|||
const qMinusT = q - t; |
|||
const baseMinusT = base - t; |
|||
output.push( |
|||
stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0)) |
|||
); |
|||
q = floor(qMinusT / baseMinusT); |
|||
} |
|||
|
|||
output.push(stringFromCharCode(digitToBasic(q, 0))); |
|||
bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength); |
|||
delta = 0; |
|||
++handledCPCount; |
|||
} |
|||
} |
|||
|
|||
++delta; |
|||
++n; |
|||
++delta; |
|||
++n; |
|||
|
|||
} |
|||
return output.join(''); |
|||
} |
|||
|
|||
return output.join(''); |
|||
}; |
|||
|
|||
/** |
|||
* Converts a Punycode string representing a domain name or an email address |
|||
* to Unicode. Only the Punycoded parts of the input will be converted, i.e. |
|||
* it doesn't matter if you call it on a string that has already been |
|||
* converted to Unicode. |
|||
* @memberOf punycode |
|||
* @param {String} input The Punycoded domain name or email address to |
|||
* convert to Unicode. |
|||
* @returns {String} The Unicode representation of the given Punycode |
|||
* string. |
|||
*/ |
|||
const toUnicode = function(input) { |
|||
return mapDomain(input, function(string) { |
|||
return regexPunycode.test(string) |
|||
? decode(string.slice(4).toLowerCase()) |
|||
: string; |
|||
}); |
|||
}; |
|||
|
|||
/** |
|||
* Converts a Unicode string representing a domain name or an email address to |
|||
* Punycode. Only the non-ASCII parts of the domain name will be converted, |
|||
* i.e. it doesn't matter if you call it with a domain that's already in |
|||
* ASCII. |
|||
* @memberOf punycode |
|||
* @param {String} input The domain name or email address to convert, as a |
|||
* Unicode string. |
|||
* @returns {String} The Punycode representation of the given domain name or |
|||
* email address. |
|||
*/ |
|||
const toASCII = function(input) { |
|||
return mapDomain(input, function(string) { |
|||
return regexNonASCII.test(string) |
|||
? 'xn--' + encode(string) |
|||
: string; |
|||
}); |
|||
}; |
|||
|
|||
/*--------------------------------------------------------------------------*/ |
|||
|
|||
/** Define the public API */ |
|||
const punycode = { |
|||
/** |
|||
* Converts a Punycode string representing a domain name or an email address |
|||
* to Unicode. Only the Punycoded parts of the input will be converted, i.e. |
|||
* it doesn't matter if you call it on a string that has already been |
|||
* converted to Unicode. |
|||
* A string representing the current Punycode.js version number. |
|||
* @memberOf punycode |
|||
* @param {String} input The Punycoded domain name or email address to |
|||
* convert to Unicode. |
|||
* @returns {String} The Unicode representation of the given Punycode |
|||
* string. |
|||
* @type String |
|||
*/ |
|||
function toUnicode(input) { |
|||
return mapDomain(input, function(string) { |
|||
return regexPunycode.test(string) |
|||
? decode(string.slice(4).toLowerCase()) |
|||
: string; |
|||
}); |
|||
} |
|||
|
|||
'version': '2.0.0', |
|||
/** |
|||
* Converts a Unicode string representing a domain name or an email address to |
|||
* Punycode. Only the non-ASCII parts of the domain name will be converted, |
|||
* i.e. it doesn't matter if you call it with a domain that's already in |
|||
* ASCII. |
|||
* An object of methods to convert from JavaScript's internal character |
|||
* representation (UCS-2) to Unicode code points, and back. |
|||
* @see <https://mathiasbynens.be/notes/javascript-encoding>
|
|||
* @memberOf punycode |
|||
* @param {String} input The domain name or email address to convert, as a |
|||
* Unicode string. |
|||
* @returns {String} The Punycode representation of the given domain name or |
|||
* email address. |
|||
* @type Object |
|||
*/ |
|||
function toASCII(input) { |
|||
return mapDomain(input, function(string) { |
|||
return regexNonASCII.test(string) |
|||
? 'xn--' + encode(string) |
|||
: string; |
|||
}); |
|||
} |
|||
|
|||
/*--------------------------------------------------------------------------*/ |
|||
|
|||
/** Define the public API */ |
|||
punycode = { |
|||
/** |
|||
* A string representing the current Punycode.js version number. |
|||
* @memberOf punycode |
|||
* @type String |
|||
*/ |
|||
'version': '1.3.2', |
|||
/** |
|||
* An object of methods to convert from JavaScript's internal character |
|||
* representation (UCS-2) to Unicode code points, and back. |
|||
* @see <https://mathiasbynens.be/notes/javascript-encoding>
|
|||
* @memberOf punycode |
|||
* @type Object |
|||
*/ |
|||
'ucs2': { |
|||
'decode': ucs2decode, |
|||
'encode': ucs2encode |
|||
}, |
|||
'decode': decode, |
|||
'encode': encode, |
|||
'toASCII': toASCII, |
|||
'toUnicode': toUnicode |
|||
}; |
|||
|
|||
/** Expose `punycode` */ |
|||
// Some AMD build optimizers, like r.js, check for specific condition patterns
|
|||
// like the following:
|
|||
if ( |
|||
typeof define == 'function' && |
|||
typeof define.amd == 'object' && |
|||
define.amd |
|||
) { |
|||
define('punycode', function() { |
|||
return punycode; |
|||
}); |
|||
} else if (freeExports && freeModule) { |
|||
if (module.exports == freeExports) { // in Node.js or RingoJS v0.8.0+
|
|||
freeModule.exports = punycode; |
|||
} else { // in Narwhal or RingoJS v0.7.0-
|
|||
for (key in punycode) { |
|||
punycode.hasOwnProperty(key) && (freeExports[key] = punycode[key]); |
|||
} |
|||
} |
|||
} else { // in Rhino or a web browser
|
|||
root.punycode = punycode; |
|||
} |
|||
'ucs2': { |
|||
'decode': ucs2decode, |
|||
'encode': ucs2encode |
|||
}, |
|||
'decode': decode, |
|||
'encode': encode, |
|||
'toASCII': toASCII, |
|||
'toUnicode': toUnicode |
|||
}; |
|||
|
|||
}(this)); |
|||
module.exports = punycode; |
|||
|
Loading…
Reference in new issue