Convert raw string to array of big words with Ruby

I would like to convert a raw string to an array of big words.

As an example, here's a JavaScript function that does it well (Paul Johnston):

/*
 * Convert a raw string to an array of big-endian words
 * Characters >255 have their high-byte silently ignored.
 */
function rstr2binb(input)
{
  var output = Array(input.length >> 2);
  for(var i = 0; i < output.length; i++)
    output[i] = 0;
  for(var i = 0; i < input.length * 8; i += 8)
    output[i>>5] |= (input.charCodeAt(i / 8) & 0xFF) << (24 - i % 32);
  return output;
}

      

        
        
        
      

    

I believe the Ruby equivalent could be String # unpack (format) .

However, I don't know what the correct format should be.

Thanks for any help.

Hello