//  Binary.kt  Copyright (c) Kari Laitinen

//  http://www.naturalprogramming.com

//  2020-10-31  File created.

/*  Kotlin documentation says that bitwise operators work
    only with types int and long.
*/

fun print_in_binary_form( given_integer : Int )
{
   var bit_mask : Int = -2147483648  // equals to 0x80000000 (Long literal)

   for ( bit_counter in 1 .. 32 )
   {
      val one_bit_in_given_integer = given_integer and bit_mask

      if ( one_bit_in_given_integer  ==  0 )
      {
         print( "0" )
      }
      else
      {
         print( "1" )
      }

      bit_mask  =  bit_mask  ushr  1  // unsigned shift right
   }
}


fun main()
{
   var test_number = 0x9A9A

   print( "\n Original test number:        " )
   print_in_binary_form( test_number )

   print( "\n Twice left-shifted form:     " )
   test_number  =  test_number  shl  2   
   print_in_binary_form( test_number )

   print( "\n Back to original form:       " )
   test_number  =  test_number  shr  2 
   print_in_binary_form( test_number )

   print( "\n Last four bits zeroed:       " )
   test_number  =  test_number  and  0xFFF0
   print_in_binary_form( test_number )

   print( "\n Last four bits to one:       " )
   test_number  =  test_number  or  0x000F
   print_in_binary_form( test_number )

   print( "\n A complemented form:         " )
   test_number  =  test_number.inv()
   print_in_binary_form( test_number )

   print( "\n Exclusive OR with 0xF0F0:    " )
   test_number  =  test_number xor 0xF0F0
   print_in_binary_form( test_number )

   print( "\n Double right shift with shr:  " )
   test_number  =  test_number shr 2
   print_in_binary_form( test_number )

   print( "\n Double right shift with ushr: " )
   test_number  =  test_number ushr 2
   print_in_binary_form( test_number )

   print( "\n\n" )
}