| /* -*- 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: 9.7.js |
| ECMA Section: 9.7 Type Conversion: ToInt16 |
| Description: rules for converting an argument to an unsigned |
| 16 bit integer in the range 0 to 2^16-1. |
| |
| this test uses String.prototype.fromCharCode() and |
| String.prototype.charCodeAt() to test ToInt16. |
| |
| special cases: |
| -0 returns 0 |
| Infinity returns 0 |
| -Infinity returns 0 |
| 0 returns 0 |
| |
| Author: christine@netscape.com |
| Date: 17 july 1997 |
| */ |
| var SECTION = "9.7"; |
| var VERSION = "ECMA_1"; |
| startTest(); |
| |
| writeHeaderToLog( SECTION + " Type Conversion: ToInt16"); |
| |
| /* |
| new TestCase( "9.7", "String.fromCharCode(0).charCodeAt(0)", 0, String.fromCharCode(0).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(-0).charCodeAt(0)", 0, String.fromCharCode(-0).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(1).charCodeAt(0)", 1, String.fromCharCode(1).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(64).charCodeAt(0)", 64, String.fromCharCode(64).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(126).charCodeAt(0)", 126, String.fromCharCode(126).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(127).charCodeAt(0)", 127, String.fromCharCode(127).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(128).charCodeAt(0)", 128, String.fromCharCode(128).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(130).charCodeAt(0)", 130, String.fromCharCode(130).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(255).charCodeAt(0)", 255, String.fromCharCode(255).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(256).charCodeAt(0)", 256, String.fromCharCode(256).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(Math.pow(2,16)-1).charCodeAt(0)", 65535, String.fromCharCode(Math.pow(2,16)-1).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(Math.pow(2,16)).charCodeAt(0)", 0, String.fromCharCode(Math.pow(2,16)).charCodeAt(0) ); |
| */ |
| |
| |
| new TestCase( "9.7", "String.fromCharCode(0).charCodeAt(0)", ToInt16(0), String.fromCharCode(0).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(-0).charCodeAt(0)", ToInt16(0), String.fromCharCode(-0).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(1).charCodeAt(0)", ToInt16(1), String.fromCharCode(1).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(64).charCodeAt(0)", ToInt16(64), String.fromCharCode(64).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(126).charCodeAt(0)", ToInt16(126), String.fromCharCode(126).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(127).charCodeAt(0)", ToInt16(127), String.fromCharCode(127).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(128).charCodeAt(0)", ToInt16(128), String.fromCharCode(128).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(130).charCodeAt(0)", ToInt16(130), String.fromCharCode(130).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(255).charCodeAt(0)", ToInt16(255), String.fromCharCode(255).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(256).charCodeAt(0)", ToInt16(256), String.fromCharCode(256).charCodeAt(0) ); |
| |
| new TestCase( "9.7", "String.fromCharCode(Math.pow(2,16)-1).charCodeAt(0)", 65535, String.fromCharCode(Math.pow(2,16)-1).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(Math.pow(2,16)).charCodeAt(0)", 0, String.fromCharCode(Math.pow(2,16)).charCodeAt(0) ); |
| |
| new TestCase( "9.7", "String.fromCharCode(65535).charCodeAt(0)", ToInt16(65535), String.fromCharCode(65535).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(65536).charCodeAt(0)", ToInt16(65536), String.fromCharCode(65536).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(65537).charCodeAt(0)", ToInt16(65537), String.fromCharCode(65537).charCodeAt(0) ); |
| |
| new TestCase( "9.7", "String.fromCharCode(131071).charCodeAt(0)", ToInt16(131071), String.fromCharCode(131071).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(131072).charCodeAt(0)", ToInt16(131072), String.fromCharCode(131072).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(131073).charCodeAt(0)", ToInt16(131073), String.fromCharCode(131073).charCodeAt(0) ); |
| |
| new TestCase( "9.7", "String.fromCharCode('65535').charCodeAt(0)", 65535, String.fromCharCode("65535").charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode('65536').charCodeAt(0)", 0, String.fromCharCode("65536").charCodeAt(0) ); |
| |
| new TestCase( "9.7", "String.fromCharCode(-1).charCodeAt(0)", ToInt16(-1), String.fromCharCode(-1).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(-64).charCodeAt(0)", ToInt16(-64), String.fromCharCode(-64).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(-126).charCodeAt(0)", ToInt16(-126), String.fromCharCode(-126).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(-127).charCodeAt(0)", ToInt16(-127), String.fromCharCode(-127).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(-128).charCodeAt(0)", ToInt16(-128), String.fromCharCode(-128).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(-130).charCodeAt(0)", ToInt16(-130), String.fromCharCode(-130).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(-255).charCodeAt(0)", ToInt16(-255), String.fromCharCode(-255).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(-256).charCodeAt(0)", ToInt16(-256), String.fromCharCode(-256).charCodeAt(0) ); |
| |
| new TestCase( "9.7", "String.fromCharCode(-Math.pow(2,16)-1).charCodeAt(0)", 65535, String.fromCharCode(-Math.pow(2,16)-1).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(-Math.pow(2,16)).charCodeAt(0)", 0, String.fromCharCode(-Math.pow(2,16)).charCodeAt(0) ); |
| |
| new TestCase( "9.7", "String.fromCharCode(-65535).charCodeAt(0)", ToInt16(-65535), String.fromCharCode(-65535).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(-65536).charCodeAt(0)", ToInt16(-65536), String.fromCharCode(-65536).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(-65537).charCodeAt(0)", ToInt16(-65537), String.fromCharCode(-65537).charCodeAt(0) ); |
| |
| new TestCase( "9.7", "String.fromCharCode(-131071).charCodeAt(0)", ToInt16(-131071), String.fromCharCode(-131071).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(-131072).charCodeAt(0)", ToInt16(-131072), String.fromCharCode(-131072).charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode(-131073).charCodeAt(0)", ToInt16(-131073), String.fromCharCode(-131073).charCodeAt(0) ); |
| |
| new TestCase( "9.7", "String.fromCharCode('-65535').charCodeAt(0)", ToInt16(-65535), String.fromCharCode("-65535").charCodeAt(0) ); |
| new TestCase( "9.7", "String.fromCharCode('-65536').charCodeAt(0)", ToInt16(-65536), String.fromCharCode("-65536").charCodeAt(0) ); |
| |
| |
| // new TestCase( "9.7", "String.fromCharCode(2147483648).charCodeAt(0)", ToInt16(2147483648), String.fromCharCode(2147483648).charCodeAt(0) ); |
| |
| |
| |
| // the following test cases cause a runtime error. see: http://scopus.mcom.com/bugsplat/show_bug.cgi?id=78878 |
| |
| // new TestCase( "9.7", "String.fromCharCode(Infinity).charCodeAt(0)", 0, String.fromCharCode("Infinity").charCodeAt(0) ); |
| // new TestCase( "9.7", "String.fromCharCode(-Infinity).charCodeAt(0)", 0, String.fromCharCode("-Infinity").charCodeAt(0) ); |
| // new TestCase( "9.7", "String.fromCharCode(NaN).charCodeAt(0)", 0, String.fromCharCode(Number.NaN).charCodeAt(0) ); |
| // new TestCase( "9.7", "String.fromCharCode(Number.POSITIVE_INFINITY).charCodeAt(0)", 0, String.fromCharCode(Number.POSITIVE_INFINITY).charCodeAt(0) ); |
| // new TestCase( "9.7", "String.fromCharCode(Number.NEGATIVE_INFINITY).charCodeAt(0)", 0, String.fromCharCode(Number.NEGATIVE_INFINITY).charCodeAt(0) ); |
| |
| test(); |
| |
| function ToInt16( num ) { |
| num = Number( num ); |
| if ( isNaN( num ) || num == 0 || num == Number.POSITIVE_INFINITY || num == Number.NEGATIVE_INFINITY ) { |
| return 0; |
| } |
| |
| var sign = ( num < 0 ) ? -1 : 1; |
| |
| num = sign * Math.floor( Math.abs( num ) ); |
| |
| num = num % Math.pow(2,16); |
| |
| num = ( num > -65536 && num < 0) ? 65536 + num : num; |
| |
| return num; |
| } |
| |
