bool cast_sanctuary(int power);

bool cast_sanctuary(const int power);
int halo_radius(void);
void manage_halo(void);
bool mons_inside_halo(int posx, int posy);

              if (!inside_level_bounds(posx, posy))
                  continue;
              int dist = distance(posx, posy, you.x_pos, you.y_pos);
              if (dist > radius*radius)
                  continue;

              int dist = mons_inside_circle(posx, posy, radius);

              if (mgrd[posx][posy] != NON_MONSTER)

              if (dist != -1)

}
int halo_radius()
{
    if (you.religion == GOD_SHINING_ONE && you.piety >= piety_breakpoint(0)
        && !you.penance[GOD_SHINING_ONE])
    {
        return you.piety / 20;
    }
    else
        return 0;
}
void manage_halo()
{
    int radius = halo_radius();
    if (radius == 0)
        return;
    int monster = -1;
    if (!you.duration[DUR_BACKLIGHT])
        you.duration[DUR_BACKLIGHT] = 1;
    for (int x=-radius; x<=radius; x++)
         for (int y=-radius; y<=radius; y++)
         {
              int posx = you.x_pos + x;
              int posy = you.y_pos + y;
              // affect all monsters inside the halo
              if (mons_inside_halo(posx, posy))
              {
                  monster = mgrd[posx][posy];
                  monsters *mon = &menv[monster];
                  if (!mon->has_ench(ENCH_BACKLIGHT))
                      mon->add_ench(ENCH_BACKLIGHT);
              }
         }
}
bool mons_inside_halo(int posx, int posy)
{
    return (mons_inside_circle(posx, posy, halo_radius()) != -1);

            // the halo is once more available
            if (god == GOD_SHINING_ONE && you.religion == GOD_SHINING_ONE
                && you.piety >= piety_breakpoint(0))
            {
                mpr("Your divine halo starts to return!");
            }

            // bonuses now once more effective
            if (god == GOD_BEOGH && you.religion == GOD_BEOGH)
                 you.redraw_armour_class = true;

            // bonuses now once more effective
            if (god == GOD_BEOGH && you.religion == GOD_BEOGH)
                 you.redraw_armour_class = true;

        // nor does TSO's halo or divine shield

            mpr("Your divine halo starts to fade.");

            {   // nor does TSO's divine shield

            {

            }
            if (you.religion == GOD_SHINING_ONE)
            {
                if (i == 0)
                    mpr("A divine halo surrounds you!");

        // When you gain piety of more than 160, you get another chance
        // to make hostile holy beings neutral.
        if (is_good_god(you.religion))
            moral_beings_attitude_change();

        // When you gain piety of more than 160, you get another chance
        // to make hostile holy beings neutral.
        if (is_good_god(you.religion))
            moral_beings_attitude_change();

                if ( need_water_walking() && !beogh_water_walk() )

                if (you.religion == GOD_SHINING_ONE)

                    fall_into_a_pool( you.x_pos, you.y_pos, true,
                                      grd[you.x_pos][you.y_pos] );

                    if (i == 0)
                        mpr("Your divine halo starts to fade.");

                if ( you.religion == GOD_BEOGH )

                if ( need_water_walking() && !beogh_water_walk() )

                    // every piety level change also affects AC from
                    // orcish gear
                    you.redraw_armour_class = true;

                    fall_into_a_pool( you.x_pos, you.y_pos, true,
                                      grd[you.x_pos][you.y_pos] );

    }
    if ( you.religion == GOD_BEOGH )
    {
        // every piety level change also affects AC from orcish gear
        you.redraw_armour_class = true;

        mpr("Your divine halo starts to fade.");

#include "spells3.h"

    // monsters inside a halo don't lose backlight
    if (ench == ENCH_BACKLIGHT && mons_inside_halo(x, y))
        return (false);

bool interrupt_cmd_repeat( activity_interrupt_type ai, 

bool interrupt_cmd_repeat( activity_interrupt_type ai,

int mons_inside_circle(int posx, int posy, int radius);

}
// Is there a monster in a circle with the given radius, centered on the
// player's position?  If so, return the distance to it.  Otherwise,
// return -1.
int mons_inside_circle(int posx, int posy, int radius)
{
    if (!inside_level_bounds(posx, posy))
        return -1;
    int dist = distance(posx, posy, you.x_pos, you.y_pos);
    if (dist > radius*radius)
        return -1;
    if (mgrd[posx][posy] != NON_MONSTER)
        return dist;
    return -1;

    if (you.duration[DUR_BACKLIGHT] > 0 && !--you.duration[DUR_BACKLIGHT] && !you.backlit())

    // players inside a halo don't lose backlight
    if (you.duration[DUR_BACKLIGHT] > 0 && !halo_radius()
        && !--you.duration[DUR_BACKLIGHT] && !you.backlit())
    {

    }

    manage_halo();