#include "pline.h"

#include "damage.h"

DAMAGE damage_add(DAMAGE a, DAMAGE b)
{
 return(DMG_GENERAL(a.ordinary+b.ordinary,a.magiconly+b.magiconly,a.timeonly+b.timeonly));
}

DAMAGE damage_sub(DAMAGE a, DAMAGE b)
{
 int o;
 int mo;
 int to;

 o = a.ordinary - b.ordinary;
 mo = a.magiconly - b.magiconly;
 to = a.timeonly - b.timeonly;
 if ((o < 0) || (mo < 0) || (to < 0)) panic("damage_sub underflow");
 return(DMG_GENERAL(o,mo,to));
}

DAMAGE damage_proportion(DAMAGE d, int n)
{
 DAMAGE r;
 int t;

 t = d.ordinary + d.magiconly + d.timeonly;
 if (t < 1) return(d);
 r.ordinary = (n * d.ordinary) / t;
 n -= r.ordinary;
 t -= d.ordinary;
 if (t)
  { r.magiconly = (n * d.magiconly) / t;
    n -= r.magiconly;
  }
 else
  { r.magiconly = 0;
  }
 r.timeonly = n;
 return(r);
}