public int align(int alignValue) {
		long prevIndex = currentIndex;
		currentIndex = NumericUtilities.getUnsignedAlignedValue(currentIndex, alignValue);
		return (int) (currentIndex - prevIndex);
	}
Advances the current index so that it aligns to the specified value (if not already
aligned).
<p>
For example, if current index was 123 and align value was 16, then current index would
be advanced to 128.

@param alignValue position index alignment
@return the number of bytes required to align (0..alignValue-1)
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/BinaryReader.java