gecko/js/tests/ecma/Expressions/11.4.8.js

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/**
   File Name:          11.4.8.js
   ECMA Section:       11.4.8 Bitwise NOT Operator
   Description:        flip bits up to 32 bits
   no special cases
   Author:             christine@netscape.com
   Date:               7 july 1997

   Data File Fields:
   VALUE           value passed as an argument to the ~ operator
   E_RESULT        expected return value of ~ VALUE;

   Static variables:
   none

*/

var SECTION = "11.4.8";
var VERSION = "ECMA_1";
startTest();

writeHeaderToLog( SECTION + " Bitwise Not operator");

for ( var i = 0; i < 35; i++ ) {
  var p = Math.pow(2,i);

  new TestCase( SECTION, "~"+p,   Not(p),     ~p );

}
for ( i = 0; i < 35; i++ ) {
  var p = -Math.pow(2,i);

  new TestCase( SECTION, "~"+p,   Not(p),     ~p );

}

test();

function ToInteger( n ) {
  n = Number( n );
  var sign = ( n < 0 ) ? -1 : 1;

  if ( n != n ) {
    return 0;
  }
  if ( Math.abs( n ) == 0 || Math.abs( n ) == Number.POSITIVE_INFINITY ) {
    return n;
  }
  return ( sign * Math.floor(Math.abs(n)) );
}
function ToInt32( n ) {
  n = Number( n );
  var sign = ( n < 0 ) ? -1 : 1;

  if ( Math.abs( n ) == 0 || Math.abs( n ) == Number.POSITIVE_INFINITY) {
    return 0;
  }

  n = (sign * Math.floor( Math.abs(n) )) % Math.pow(2,32);
  n = ( n >= Math.pow(2,31) ) ? n - Math.pow(2,32) : n;

  return ( n );
}
function ToUint32( n ) {
  n = Number( n );
  var sign = ( n < 0 ) ? -1 : 1;

  if ( Math.abs( n ) == 0 || Math.abs( n ) == Number.POSITIVE_INFINITY) {
    return 0;
  }
  n = sign * Math.floor( Math.abs(n) )

    n = n % Math.pow(2,32);

  if ( n < 0 ){
    n += Math.pow(2,32);
  }

  return ( n );
}
function ToUint16( n ) {
  var sign = ( n < 0 ) ? -1 : 1;

  if ( Math.abs( n ) == 0 || Math.abs( n ) == Number.POSITIVE_INFINITY) {
    return 0;
  }

  n = ( sign * Math.floor( Math.abs(n) ) ) % Math.pow(2,16);

  if (n <0) {
    n += Math.pow(2,16);
  }

  return ( n );
}
function Mask( b, n ) {
  b = ToUint32BitString( b );
  b = b.substring( b.length - n );
  b = ToUint32Decimal( b );
  return ( b );
}
function ToUint32BitString( n ) {
  var b = "";
  for ( var p = 31; p >=0; p-- ) {
    if ( n >= Math.pow(2,p) ) {
      b += "1";
      n -= Math.pow(2,p);
    } else {
      b += "0";
    }
  }
  return b;
}
function ToInt32BitString( n ) {
  var b = "";
  var sign = ( n < 0 ) ? -1 : 1;

  b += ( sign == 1 ) ? "0" : "1";

  for ( var p = 30; p >=0; p-- ) {
    if ( (sign == 1 ) ? sign * n >= Math.pow(2,p) : sign * n > Math.pow(2,p) ) {
      b += ( sign == 1 ) ? "1" : "0";
      n -= sign * Math.pow( 2, p );
    } else {
      b += ( sign == 1 ) ? "0" : "1";
    }
  }

  return b;
}
function ToInt32Decimal( bin ) {
  var r = 0;
  var sign;

  if ( Number(bin.charAt(0)) == 0 ) {
    sign = 1;
    r = 0;
  } else {
    sign = -1;
    r = -(Math.pow(2,31));
  }

  for ( var j = 0; j < 31; j++ ) {
    r += Math.pow( 2, j ) * Number(bin.charAt(31-j));
  }

  return r;
}
function ToUint32Decimal( bin ) {
  var r = 0;

  for ( var l = bin.length; l < 32; l++ ) {
    bin = "0" + bin;
  }

  for ( var j = 0; j < 31; j++ ) {
    r += Math.pow( 2, j ) * Number(bin.charAt(31-j));
  }

  return r;
}
function Not( n ) {
  n = ToInt32(n);
  n = ToInt32BitString(n);

  var r = "";

  for( var l = 0; l < n.length; l++  ) {
    r += ( n.charAt(l) == "0" ) ? "1" : "0";
  }

  n = ToInt32Decimal(r);

  return n;
}