#include "entity.h"

DEFINE_NIL_STRUCT(struct entity, entity_nil) = { 0 };

/* ========================== *
 * Prop
 * ========================== */

void entity_enable_prop(struct entity *entity, enum entity_prop prop)
{
    u64 index = prop / 64;
    u64 bit = prop % 64;
    entity->props[index] |= ((u64)1 << bit);
}

void entity_disable_prop(struct entity *entity, enum entity_prop prop)
{
    u64 index = prop / 64;
    u64 bit = prop % 64;
    entity->props[index] &= ~((u64)1 << bit);
}

b32 entity_has_prop(struct entity *entity, enum entity_prop prop)
{
    u64 index = prop / 64;
    u64 bit = prop % 64;
    return !!(entity->props[index] & ((u64)1 << bit));
}