| /* -*- tab-width: 2; indent-tabs-mode: nil; js-indent-level: 2 -*- */ |
| /* This Source Code Form is subject to the terms of the Mozilla Public |
| * License, v. 2.0. If a copy of the MPL was not distributed with this |
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| |
| |
| /** |
| File Name: 15.1.2.5-2.js |
| ECMA Section: 15.1.2.5 Function properties of the global object |
| unescape( string ) |
| Description: |
| |
| This tests the cases where there are fewer than 4 characters following "%u", |
| or fewer than 2 characters following "%" or "%u". |
| |
| The unescape function computes a new version of a string value in which |
| each escape sequences of the sort that might be introduced by the escape |
| function is replaced with the character that it represents. |
| |
| When the unescape function is called with one argument string, the |
| following steps are taken: |
| |
| 1. Call ToString(string). |
| 2. Compute the number of characters in Result(1). |
| 3. Let R be the empty string. |
| 4. Let k be 0. |
| 5. If k equals Result(2), return R. |
| 6. Let c be the character at position k within Result(1). |
| 7. If c is not %, go to step 18. |
| 8. If k is greater than Result(2)-6, go to step 14. |
| 9. If the character at position k+1 within result(1) is not u, go to step |
| 14. |
| 10. If the four characters at positions k+2, k+3, k+4, and k+5 within |
| Result(1) are not all hexadecimal digits, go to step 14. |
| 11. Let c be the character whose Unicode encoding is the integer represented |
| by the four hexadecimal digits at positions k+2, k+3, k+4, and k+5 |
| within Result(1). |
| 12. Increase k by 5. |
| 13. Go to step 18. |
| 14. If k is greater than Result(2)-3, go to step 18. |
| 15. If the two characters at positions k+1 and k+2 within Result(1) are not |
| both hexadecimal digits, go to step 18. |
| 16. Let c be the character whose Unicode encoding is the integer represented |
| by two zeroes plus the two hexadecimal digits at positions k+1 and k+2 |
| within Result(1). |
| 17. Increase k by 2. |
| 18. Let R be a new string value computed by concatenating the previous value |
| of R and c. |
| 19. Increase k by 1. |
| 20. Go to step 5. |
| Author: christine@netscape.com |
| Date: 28 october 1997 |
| */ |
| |
| var SECTION = "15.1.2.5-2"; |
| var VERSION = "ECMA_1"; |
| startTest(); |
| var TITLE = "unescape(string)"; |
| |
| writeHeaderToLog( SECTION + " "+ TITLE); |
| |
| // since there is only one character following "%", no conversion should occur. |
| |
| for ( var CHARCODE = 0; CHARCODE < 256; CHARCODE += 16 ) { |
| new TestCase( SECTION, |
| "unescape( %"+ (ToHexString(CHARCODE)).substring(0,1) +" )", |
| "%"+(ToHexString(CHARCODE)).substring(0,1), |
| unescape( "%" + (ToHexString(CHARCODE)).substring(0,1) ) ); |
| } |
| |
| // since there is only one character following "%u", no conversion should occur. |
| |
| for ( var CHARCODE = 0; CHARCODE < 256; CHARCODE +=16 ) { |
| new TestCase( SECTION, |
| "unescape( %u"+ (ToHexString(CHARCODE)).substring(0,1) +" )", |
| "%u"+(ToHexString(CHARCODE)).substring(0,1), |
| unescape( "%u" + (ToHexString(CHARCODE)).substring(0,1) ) ); |
| } |
| |
| |
| // three char unicode string. no conversion should occur |
| |
| for ( var CHARCODE = 1024; CHARCODE < 65536; CHARCODE+= 1234 ) { |
| new TestCase |
| ( SECTION, |
| "unescape( %u"+ (ToUnicodeString(CHARCODE)).substring(0,3)+ " )", |
| |
| "%u"+(ToUnicodeString(CHARCODE)).substring(0,3), |
| unescape( "%u"+(ToUnicodeString(CHARCODE)).substring(0,3) ) |
| ); |
| } |
| |
| test(); |
| |
| function ToUnicodeString( n ) { |
| var string = ToHexString(n); |
| |
| for ( var PAD = (4 - string.length ); PAD > 0; PAD-- ) { |
| string = "0" + string; |
| } |
| |
| return string; |
| } |
| function ToHexString( n ) { |
| var hex = new Array(); |
| |
| for ( var mag = 1; Math.pow(16,mag) <= n ; mag++ ) { |
| ; |
| } |
| |
| for ( index = 0, mag -= 1; mag > 0; index++, mag-- ) { |
| hex[index] = Math.floor( n / Math.pow(16,mag) ); |
| n -= Math.pow(16,mag) * Math.floor( n/Math.pow(16,mag) ); |
| } |
| |
| hex[hex.length] = n % 16; |
| |
| var string =""; |
| |
| for ( var index = 0 ; index < hex.length ; index++ ) { |
| switch ( hex[index] ) { |
| case 10: |
| string += "A"; |
| break; |
| case 11: |
| string += "B"; |
| break; |
| case 12: |
| string += "C"; |
| break; |
| case 13: |
| string += "D"; |
| break; |
| case 14: |
| string += "E"; |
| break; |
| case 15: |
| string += "F"; |
| break; |
| default: |
| string += hex[index]; |
| } |
| } |
| |
| if ( string.length == 1 ) { |
| string = "0" + string; |
| } |
| return string; |
| } |