#ifndef WH_DAMAGE_H_15ae2a53_
#define WH_DAMAGE_H_15ae2a53_

#include "structs.h"

/*
 * Add two DAMAGEs together.
 */
extern DAMAGE damage_add(DAMAGE, DAMAGE);

/*
 * Subtract one DAMAGE from another.  It is a panic()-level error for
 *  any of the components to go below 0.
 */
extern DAMAGE damage_sub(DAMAGE, DAMAGE);

/*
 * Create and return a DAMAGE whose components add up to the second
 *  argument and which are in (approximate) proportion to the first
 *  argument's components.
 *
 * Thinking of DAMAGEs as vectors in 3-space, this takes the first arg
 *  and scales it to have magnitude equal to the second arg
 *  (approximately, of course, because everything is integers).
 */
extern DAMAGE damage_proportion(DAMAGE, int);

#endif