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+/* -*- 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/. */
+
+/*
+ *
+ * Date:    18 Feb 2002
+ * SUMMARY: Testing re.exec(str) when re.lastIndex is < 0 or > str.length
+ *
+ * Case 1: If re has the global flag set, then re(str) should be null
+ * Case 2: If re doesn't have this set, then re(str) should be unaffected
+ *
+ * See http://bugzilla.mozilla.org/show_bug.cgi?id=76717
+ *
+ *
+ * From the ECMA-262 Final spec:
+ *
+ * 15.10.6.2 RegExp.prototype.exec(string)
+ * Performs a regular expression match of string against the regular
+ * expression and returns an Array object containing the results of
+ * the match, or null if the string did not match.
+ *
+ * The string ToString(string) is searched for an occurrence of the
+ * regular expression pattern as follows:
+ *
+ * 1.  Let S be the value of ToString(string).
+ * 2.  Let length be the length of S.
+ * 3.  Let lastIndex be the value of the lastIndex property.
+ * 4.  Let i be the value of ToInteger(lastIndex).
+ * 5.  If the global property is false, let i = 0.
+ * 6.  If i < 0 or i > length then set lastIndex to 0 and return null.
+ * 7.  Call [[Match]], giving it the arguments S and i.
+ *     If [[Match]] returned failure, go to step 8;
+ *     otherwise let r be its State result and go to step 10.
+ * 8.  Let i = i+1.
+ * 9.  Go to step 6.
+ * 10. Let e be r's endIndex value.
+ * 11. If the global property is true, set lastIndex to e.
+ *
+ *          etc.
+ *
+ *
+ * So:
+ *
+ * A. If the global flag is not set, |lastIndex| is set to 0
+ *    before the match is attempted; thus the match is unaffected.
+ *
+ * B. If the global flag IS set and re.lastIndex is >= 0 and <= str.length,
+ *    |lastIndex| is incremented every time there is a match; not from
+ *    i to i+1, but from i to "endIndex" e:
+ *
+ *      e = (index of last input character matched so far by the pattern) + 1
+ *
+ *    The match is then attempted from this position in the string (Step 7).
+ *
+ * C. When the global flag IS set and re.lastIndex is < 0 or > str.length,
+ *    |lastIndex| is set to 0 and the match returns null.
+ *
+ *
+ * Note the |lastIndex| property is writeable, and may be set arbitrarily
+ * by the programmer - and we will do that below.
+ *
+ */
+//-----------------------------------------------------------------------------
+var i = 0;
+var BUGNUMBER = 76717;
+var summary = 'Testing re.exec(str) when re.lastIndex is < 0 or > str.length';
+var status = '';
+var statusmessages = new Array();
+var pattern = '';
+var patterns = new Array();
+var string = '';
+var strings = new Array();
+var actualmatch = '';
+var actualmatches = new Array();
+var expectedmatch = '';
+var expectedmatches = new Array();
+
+
+/******************************************************************************
+ *
+ * Case 1 : when the global flag is set -
+ *
+ *****************************************************************************/
+pattern = /abc/gi;
+string = 'AbcaBcabC';
+
+status = inSection(1);
+actualmatch = pattern.exec(string);
+expectedmatch = Array('Abc');
+addThis();
+
+status = inSection(2);
+actualmatch = pattern.exec(string);
+expectedmatch = Array('aBc');
+addThis();
+
+status = inSection(3);
+actualmatch = pattern.exec(string);
+expectedmatch = Array('abC');
+addThis();
+
+/*
+ * At this point |lastIndex| is > string.length, so the match should be null -
+ */
+status = inSection(4);
+actualmatch = pattern.exec(string);
+expectedmatch = null;
+addThis();
+
+/*
+ * Now try some edge-case values. Thanks to the work done in
+ * http://bugzilla.mozilla.org/show_bug.cgi?id=124339, |lastIndex|
+ * is now stored as a double instead of a uint32_t (unsigned integer).
+ *
+ * Note 2^32 -1 is the upper bound for uint32's, but doubles can go
+ * all the way up to Number.MAX_VALUE. So that's why we need cases
+ * between those two numbers.
+ */
+status = inSection(6);
+pattern.lastIndex = Math.pow(2,32);
+actualmatch = pattern.exec(string);
+expectedmatch = null;
+addThis();
+ 
+status = inSection(8);
+pattern.lastIndex = Math.pow(2,32) + 1;
+actualmatch = pattern.exec(string);
+expectedmatch = null;
+addThis();
+
+status = inSection(10);
+pattern.lastIndex = Math.pow(2,32) * 2;
+actualmatch = pattern.exec(string);
+expectedmatch = null;
+addThis();
+
+status = inSection(12);
+pattern.lastIndex = Math.pow(2,40);
+actualmatch = pattern.exec(string);
+expectedmatch = null;
+addThis();
+
+status = inSection(14);
+pattern.lastIndex = Number.MAX_VALUE;
+actualmatch = pattern.exec(string);
+expectedmatch = null;
+addThis();
+
+
+
+/******************************************************************************
+ *
+ * Case 2: repeat all the above cases WITHOUT the global flag set.
+ * According to EMCA. |lastIndex| should get set to 0 before the match.
+ *
+ * Therefore re.exec(str) should be unaffected; thus our expected values
+ * below are now DIFFERENT when |lastIndex| is < 0 or > str.length
+ *
+ *****************************************************************************/
+
+pattern = /abc/i;
+string = 'AbcaBcabC';
+
+status = inSection(16);
+actualmatch = pattern.exec(string);
+expectedmatch = Array('Abc');
+addThis();
+
+status = inSection(17);
+actualmatch = pattern.exec(string);
+expectedmatch = Array('Abc'); // NOT Array('aBc') as before -
+addThis();
+
+status = inSection(18);
+actualmatch = pattern.exec(string);
+expectedmatch = Array('Abc'); // NOT Array('abC') as before -
+addThis();
+
+/*
+ * At this point above, |lastIndex| WAS > string.length, but not here -
+ */
+status = inSection(19);
+actualmatch = pattern.exec(string);
+expectedmatch = Array('Abc') // NOT null as before -
+  addThis();
+
+/*
+ * Now let's set |lastIndex| to -1
+ */
+status = inSection(20);
+pattern.lastIndex = -1;
+actualmatch = pattern.exec(string);
+expectedmatch = Array('Abc') // NOT null as before -
+  addThis();
+
+/*
+ * Now try some edge-case values. Thanks to the work done in
+ * http://bugzilla.mozilla.org/show_bug.cgi?id=124339, |lastIndex|
+ * is now stored as a double instead of a uint32_t (unsigned integer).
+ *
+ * Note 2^32 -1 is the upper bound for uint32's, but doubles can go
+ * all the way up to Number.MAX_VALUE. So that's why we need cases
+ * between those two numbers.
+ */
+status = inSection(21);
+pattern.lastIndex = Math.pow(2,32);
+actualmatch = pattern.exec(string);
+expectedmatch = Array('Abc') // NOT null as before -
+  addThis();
+ 
+status = inSection(22);
+pattern.lastIndex = -Math.pow(2,32);
+actualmatch = pattern.exec(string);
+expectedmatch = Array('Abc') // NOT null as before -
+  addThis();
+
+status = inSection(23);
+pattern.lastIndex = Math.pow(2,32) + 1;
+actualmatch = pattern.exec(string);
+expectedmatch = Array('Abc') // NOT null as before -
+  addThis();
+
+status = inSection(24);
+pattern.lastIndex = -(Math.pow(2,32) + 1);
+actualmatch = pattern.exec(string);
+expectedmatch = Array('Abc') // NOT null as before -
+  addThis();
+
+status = inSection(25);
+pattern.lastIndex = Math.pow(2,32) * 2;
+actualmatch = pattern.exec(string);
+expectedmatch = Array('Abc') // NOT null as before -
+  addThis();
+
+status = inSection(26);
+pattern.lastIndex = -Math.pow(2,32) * 2;
+actualmatch = pattern.exec(string);
+expectedmatch = Array('Abc') // NOT null as before -
+  addThis();
+
+status = inSection(27);
+pattern.lastIndex = Math.pow(2,40);
+actualmatch = pattern.exec(string);
+expectedmatch = Array('Abc') // NOT null as before -;
+  addThis();
+
+status = inSection(28);
+pattern.lastIndex = -Math.pow(2,40);
+actualmatch = pattern.exec(string);
+expectedmatch = Array('Abc') // NOT null as before -
+  addThis();
+
+status = inSection(29);
+pattern.lastIndex = Number.MAX_VALUE;
+actualmatch = pattern.exec(string);
+expectedmatch = Array('Abc') // NOT null as before -
+  addThis();
+
+status = inSection(30);
+pattern.lastIndex = -Number.MAX_VALUE;
+actualmatch = pattern.exec(string);
+expectedmatch = Array('Abc') // NOT null as before -
+  addThis();
+
+
+
+
+//-------------------------------------------------------------------------------------------------
+test();
+//-------------------------------------------------------------------------------------------------
+
+
+
+function addThis()
+{
+  statusmessages[i] = status;
+  patterns[i] = pattern;
+  strings[i] = string;
+  actualmatches[i] = actualmatch;
+  expectedmatches[i] = expectedmatch;
+  i++;
+}
+
+
+function test()
+{
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+  testRegExp(statusmessages, patterns, strings, actualmatches, expectedmatches);
+}