/* ***** BEGIN LICENSE BLOCK ***** * Version: NPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Netscape Public License * Version 1.1 (the "License"); you may not use this file except in * compliance with the License. You may obtain a copy of the License at * http://www.mozilla.org/NPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is JavaScript Engine testing utilities. * * The Initial Developer of the Original Code is Netscape Communications Corp. * Portions created by the Initial Developer are Copyright (C) 2002 * the Initial Developer. All Rights Reserved. * * Contributor(s): rogerl@netscape.com, pschwartau@netscape.com * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the NPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the NPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** * * * Date: 15 July 2002 * SUMMARY: Testing identifiers with double-byte names * See http://bugzilla.mozilla.org/show_bug.cgi?id=58274 * * Here is a sample of the problem: * * js> function f\u02B1 () {} * * js> f\u02B1.toSource(); * function f¦() {} * * js> f\u02B1.toSource().toSource(); * (new String("function f\xB1() {}")) * * * See how the high-byte information (the 02) has been lost? * The same thing was happening with the toString() method: * * js> f\u02B1.toString(); * * function f¦() { * } * * js> f\u02B1.toString().toSource(); * (new String("\nfunction f\xB1() {\n}\n")) * */ //----------------------------------------------------------------------------- var UBound = 0; var bug = 58274; var summary = 'Testing identifiers with double-byte names'; var status = ''; var statusitems = []; var actual = ''; var actualvalues = []; var expect= ''; var expectedvalues = []; /* * Define a function that uses double-byte identifiers in * "every possible way" * * Then recover each double-byte identifier via f.toString(). * To make this easier, put a 'Z' token before every one. * * Our eval string will be: * * sEval = "function Z\u02b1(Z\u02b2, b) { * try { Z\u02b3 : var Z\u02b4 = Z\u02b1; } * catch (Z\u02b5) { for (var Z\u02b6 in Z\u02b5) * {for (1; 1<0; Z\u02b7++) {new Array()[Z\u02b6] = 1;} };} }"; * * It will be helpful to build this string in stages: */ var s0 = 'function Z'; var s1 = '\u02b1(Z'; var s2 = '\u02b2, b) {try { Z'; var s3 = '\u02b3 : var Z'; var s4 = '\u02b4 = Z'; var s5 = '\u02b1; } catch (Z' var s6 = '\u02b5) { for (var Z'; var s7 = '\u02b6 in Z'; var s8 = '\u02b5){for (1; 1<0; Z'; var s9 = '\u02b7++) {new Array()[Z'; var s10 = '\u02b6] = 1;} };} }'; /* * Concatenate these and eval() to create the function Z\u02b1 */ var sEval = s0 + s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10; eval(sEval); /* * Recover all the double-byte identifiers via Z\u02b1.toString(). * We'll recover the 1st one as arrID[1], the 2nd one as arrID[2], * and so on ... */ var arrID = getIdentifiers(Z\u02b1); /* * Now check that we got back what we put in - */ status = inSection(1); actual = arrID[1]; expect = s1.charAt(0); addThis(); status = inSection(2); actual = arrID[2]; expect = s2.charAt(0); addThis(); status = inSection(3); actual = arrID[3]; expect = s3.charAt(0); addThis(); status = inSection(4); actual = arrID[4]; expect = s4.charAt(0); addThis(); status = inSection(5); actual = arrID[5]; expect = s5.charAt(0); addThis(); status = inSection(6); actual = arrID[6]; expect = s6.charAt(0); addThis(); status = inSection(7); actual = arrID[7]; expect = s7.charAt(0); addThis(); status = inSection(8); actual = arrID[8]; expect = s8.charAt(0); addThis(); status = inSection(9); actual = arrID[9]; expect = s9.charAt(0); addThis(); status = inSection(10); actual = arrID[10]; expect = s10.charAt(0); addThis(); //----------------------------------------------------------------------------- test(); //----------------------------------------------------------------------------- /* * Goal: recover the double-byte identifiers from f.toString() * by getting the very next character after each 'Z' token. * * The return value will be an array |arr| indexed such that * |arr[1]| is the 1st identifier, |arr[2]| the 2nd, and so on. * * Note, however, f.toString() is implementation-independent. * For example, it may begin with '\nfunction' instead of 'function'. * * Rhino uses a Unicode representation for f.toString(); whereas * SpiderMonkey uses an ASCII representation, putting escape sequences * for non-ASCII characters. For example, if a function is called f\u02B1, * then in Rhino the toString() method will present a 2-character Unicode * string for its name, whereas SpiderMonkey will present a 7-character * ASCII string for its name: the string literal 'f\u02B1'. * * So we force the lexer to condense the string before we use it. * This will give uniform results in Rhino and SpiderMonkey. */ function getIdentifiers(f) { var str = condenseStr(f.toString()); var arr = str.split('Z'); /* * The identifiers are the 1st char of each split substring * EXCEPT the first one, which is just ('\n' +) 'function '. * * Thus note the 1st identifier will be stored in |arr[1]|, * the 2nd one in |arr[2]|, etc., making the indexing easy - */ for (i in arr) arr[i] = arr[i].charAt(0); return arr; } /* * This function is the opposite of a functions like escape(), which take * Unicode characters and return escape sequences for them. Here, we force * the lexer to turn escape sequences back into single characters. * * Note we can't simply do |eval(str)|, since in practice |str| will be an * identifier somewhere in the program (e.g. a function name); thus |eval(str)| * would return the object that the identifier represents: not what we want. * * So we surround |str| lexicographically with quotes to force the lexer to * evaluate it as a string. Have to strip out any linefeeds first, however - */ function condenseStr(str) { /* * You won't be able to do the next step if |str| has * any carriage returns or linefeeds in it. For example: * * js> eval("'" + '\nHello' + "'"); * 1: SyntaxError: unterminated string literal: * 1: ' * 1: ^ * * So replace them with the empty string - */ str = str.replace(/[\r\n]/g, '') return eval("'" + str + "'") } function addThis() { statusitems[UBound] = status; actualvalues[UBound] = actual; expectedvalues[UBound] = expect; UBound++; } function test() { enterFunc('test'); printBugNumber(bug); printStatus(summary); for (var i=0; i<UBound; i++) { reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]); } exitFunc ('test'); }