JSTests/mozilla/ecma_3/RegExp/regress-119909.js

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* The Original Code is JavaScript Engine testing utilities.
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* the Initial Developer. All Rights Reserved.
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* Contributor(s): 1010mozilla@Ostermiller.com, pschwartau@netscape.com
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*
*
* Date:    14 Jan 2002
* SUMMARY: Shouldn't crash on regexps with many nested parentheses
* See http://bugzilla.mozilla.org/show_bug.cgi?id=119909
*
*/
//-----------------------------------------------------------------------------
var bug = 119909;
var summary = "Shouldn't crash on regexps with many nested parentheses";
var NO_BACKREFS = false;
var DO_BACKREFS = true;


//--------------------------------------------------
test();
//--------------------------------------------------


function test()
{
  enterFunc('test');
  printBugNumber(bug);
  printStatus(summary);

  // Changed the parameter from 500 to 200 for WebKit, because PCRE reports an error for more parentheses.
  testThis(200, NO_BACKREFS, 'hello', 'goodbye');
  testThis(200, DO_BACKREFS, 'hello', 'goodbye');

  exitFunc('test');
}


/*
 * Creates a regexp pattern like (((((((((hello)))))))))
 * and tests str.search(), str.match(), str.replace()
 */
function testThis(numParens, doBackRefs, strOriginal, strReplace)
{
  var openParen = doBackRefs? '(' : '(?:';
  var closeParen = ')';
  var pattern = '';
  
  for (var i=0; i<numParens; i++) {pattern += openParen;}
  pattern += strOriginal;
  for (i=0; i<numParens; i++) {pattern += closeParen;}
  var re = new RegExp(pattern);

  var res = strOriginal.search(re);
  res = strOriginal.match(re);
  res = strOriginal.replace(re, strReplace);
}