Iterates over the specified area of this buffer with the specified {@code processor} in ascending order.
(i.e. {@code index}, {@code (index + 1)}, .. {@code (index + length - 1)})
@return {@code -1} if the processor iterated to or beyond the end of the specified area.
The last-visited index If the {@link ByteProcessor#process(byte)} returned {@code false}.
Iterates over the specified area of this buffer with the specified {@code processor} in ascending order. (i.e. {@code index}, {@code (index + 1)}, .. {@code (index + length - 1)})
@return {@code -1} if the processor iterated to or beyond the end of the specified area. The last-visited index If the {@link ByteProcessor#process(byte)} returned {@code false}.