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authorThe Android Open Source Project <initial-contribution@android.com>2009-03-03 18:28:41 -0800
committerThe Android Open Source Project <initial-contribution@android.com>2009-03-03 18:28:41 -0800
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-/* 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 Mozilla Communicator client code, released March
- * 31, 1998.
- *
- * The Initial Developer of the Original Code is Netscape Communications
- * Corporation. Portions created by Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation. All
- * Rights Reserved.
- *
- * Contributor(s):
- *
- */
-/**
- File Name: 15.5.4.7-1.js
- ECMA Section: 15.5.4.7 String.prototype.lastIndexOf( searchString, pos)
- Description:
-
- If the given searchString appears as a substring of the result of
- converting this object to a string, at one or more positions that are
- at or to the left of the specified position, then the index of the
- rightmost such position is returned; otherwise -1 is returned. If position
- is undefined or not supplied, the length of this string value is assumed,
- so as to search all of the string.
-
- When the lastIndexOf method is called with two arguments searchString and
- position, the following steps are taken:
-
- 1.Call ToString, giving it the this value as its argument.
- 2.Call ToString(searchString).
- 3.Call ToNumber(position). (If position is undefined or not supplied, this step produces the value NaN).
- 4.If Result(3) is NaN, use +; otherwise, call ToInteger(Result(3)).
- 5.Compute the number of characters in Result(1).
- 6.Compute min(max(Result(4), 0), Result(5)).
- 7.Compute the number of characters in the string that is Result(2).
- 8.Compute the largest possible integer k not larger than Result(6) such that k+Result(7) is not greater
- than Result(5), and for all nonnegative integers j less than Result(7), the character at position k+j of
- Result(1) is the same as the character at position j of Result(2); but if there is no such integer k, then
- compute the value -1.
-
- 1.Return Result(8).
-
- Note that the lastIndexOf function is intentionally generic; it does not require that its this value be a
- String object. Therefore it can be transferred to other kinds of objects for use as a method.
-
- Author: christine@netscape.com
- Date: 2 october 1997
-*/
- var SECTION = "15.5.4.7-1";
- var VERSION = "ECMA_1";
- startTest();
- var TITLE = "String.protoype.lastIndexOf";
-
- var TEST_STRING = new String( " !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~" );
-
- writeHeaderToLog( SECTION + " "+ TITLE);
-
- var testcases = getTestCases();
- test();
-
-
-function getTestCases() {
- var array = new Array();
- var j = 0;
-
- for ( k = 0, i = 0x0021; i < 0x007e; i++, j++, k++ ) {
- array[j] = new TestCase( SECTION,
- "String.lastIndexOf(" +String.fromCharCode(i)+ ", 0)",
- -1,
- TEST_STRING.lastIndexOf( String.fromCharCode(i), 0 ) );
- }
-
- for ( k = 0, i = 0x0020; i < 0x007e; i++, j++, k++ ) {
- array[j] = new TestCase( SECTION,
- "String.lastIndexOf("+String.fromCharCode(i)+ ", "+ k +")",
- k,
- TEST_STRING.lastIndexOf( String.fromCharCode(i), k ) );
- }
-
- for ( k = 0, i = 0x0020; i < 0x007e; i++, j++, k++ ) {
- array[j] = new TestCase( SECTION,
- "String.lastIndexOf("+String.fromCharCode(i)+ ", "+k+1+")",
- k,
- TEST_STRING.lastIndexOf( String.fromCharCode(i), k+1 ) );
- }
-
- for ( k = 9, i = 0x0021; i < 0x007d; i++, j++, k++ ) {
- array[j] = new TestCase( SECTION,
-
- "String.lastIndexOf("+(String.fromCharCode(i) +
- String.fromCharCode(i+1)+
- String.fromCharCode(i+2)) +", "+ 0 + ")",
- LastIndexOf( TEST_STRING, String.fromCharCode(i) +
- String.fromCharCode(i+1)+String.fromCharCode(i+2), 0),
- TEST_STRING.lastIndexOf( (String.fromCharCode(i)+
- String.fromCharCode(i+1)+
- String.fromCharCode(i+2)),
- 0 ) );
- }
-
- for ( k = 0, i = 0x0020; i < 0x007d; i++, j++, k++ ) {
- array[j] = new TestCase( SECTION,
- "String.lastIndexOf("+(String.fromCharCode(i) +
- String.fromCharCode(i+1)+
- String.fromCharCode(i+2)) +", "+ k +")",
- k,
- TEST_STRING.lastIndexOf( (String.fromCharCode(i)+
- String.fromCharCode(i+1)+
- String.fromCharCode(i+2)),
- k ) );
- }
- for ( k = 0, i = 0x0020; i < 0x007d; i++, j++, k++ ) {
- array[j] = new TestCase( SECTION,
- "String.lastIndexOf("+(String.fromCharCode(i) +
- String.fromCharCode(i+1)+
- String.fromCharCode(i+2)) +", "+ k+1 +")",
- k,
- TEST_STRING.lastIndexOf( (String.fromCharCode(i)+
- String.fromCharCode(i+1)+
- String.fromCharCode(i+2)),
- k+1 ) );
- }
- for ( k = 0, i = 0x0020; i < 0x007d; i++, j++, k++ ) {
- array[j] = new TestCase( SECTION,
- "String.lastIndexOf("+
- (String.fromCharCode(i) +
- String.fromCharCode(i+1)+
- String.fromCharCode(i+2)) +", "+ (k-1) +")",
- LastIndexOf( TEST_STRING, String.fromCharCode(i) +
- String.fromCharCode(i+1)+String.fromCharCode(i+2), k-1),
- TEST_STRING.lastIndexOf( (String.fromCharCode(i)+
- String.fromCharCode(i+1)+
- String.fromCharCode(i+2)),
- k-1 ) );
- }
-
- array[j++] = new TestCase( SECTION, "String.lastIndexOf(" +TEST_STRING + ", 0 )", 0, TEST_STRING.lastIndexOf( TEST_STRING, 0 ) );
-// array[j++] = new TestCase( SECTION, "String.lastIndexOf(" +TEST_STRING + ", 1 )", 0, TEST_STRING.lastIndexOf( TEST_STRING, 1 ));
- array[j++] = new TestCase( SECTION, "String.lastIndexOf(" +TEST_STRING + ")", 0, TEST_STRING.lastIndexOf( TEST_STRING ));
-
- return array;
-}
-
-function test() {
- writeLineToLog( "TEST_STRING = new String(\" !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\")" );
-
- for ( tc = 0; tc < testcases.length; tc++ ) {
-
- testcases[tc].passed = writeTestCaseResult(
- testcases[tc].expect,
- testcases[tc].actual,
- testcases[tc].description +" = "+ testcases[tc].actual );
-
- testcases[tc].reason += ( testcases[tc].passed ) ? "" : "wrong value "
-
- }
- stopTest();
-
- return ( testcases );
-}
-
-function LastIndexOf( string, search, position ) {
- string = String( string );
- search = String( search );
-
- position = Number( position )
-
- if ( isNaN( position ) ) {
- position = Infinity;
- } else {
- position = ToInteger( position );
- }
-
- result5= string.length;
- result6 = Math.min(Math.max(position, 0), result5);
- result7 = search.length;
-
- if (result7 == 0) {
- return Math.min(position, result5);
- }
-
- result8 = -1;
-
- for ( k = 0; k <= result6; k++ ) {
- if ( k+ result7 > result5 ) {
- break;
- }
- for ( j = 0; j < result7; j++ ) {
- if ( string.charAt(k+j) != search.charAt(j) ){
- break;
- } else {
- if ( j == result7 -1 ) {
- result8 = k;
- }
- }
- }
- }
-
- return result8;
-}
-function ToInteger( n ) {
- n = Number( n );
- if ( isNaN(n) ) {
- return 0;
- }
- if ( Math.abs(n) == 0 || Math.abs(n) == Infinity ) {
- return n;
- }
-
- var sign = ( n < 0 ) ? -1 : 1;
-
- return ( sign * Math.floor(Math.abs(n)) );
-} \ No newline at end of file