#ifndef RT_STDDEF_H
#define RT_STDDEF_H

#define nil ((void*)0)

/* Generate a number with the x lowest bits set to 1 */
#define LOWER(X) ((1 << (X)) - 1)

/* Align a number to the upper boundary */
#define ALIGN_UP(X, F) ((X) - (X) % (F) + (F))

#endif