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/*
* Created by Ian "Goober5000" Warfield for the FreeSpace2 Source Code Project.
* You may not sell or otherwise commercially exploit the source or things you
* create based on the source.
*/
#include "globalincs/pstypes.h"
#include "object/deadobjectdock.h"
#include "object/object.h"
// management prototypes
void dead_dock_add_instance(object *objp, int dockpoint, object *other_objp);
void dead_dock_remove_instance(object *objp, object *other_objp);
dock_instance *dead_dock_find_instance(object *objp, object *other_objp);
dock_instance *dead_dock_find_instance(object *objp, int dockpoint);
object *dock_get_first_dead_docked_object(object *objp)
{
// are we docked?
if (!object_is_dead_docked(objp))
return NULL;
return objp->dead_dock_list->docked_objp;
}
int dock_find_dead_dockpoint_used_by_object(object *objp, object *other_objp)
{
dock_instance *result = dead_dock_find_instance(objp, other_objp);
if (result == NULL)
return -1;
else
return result->dockpoint_used;
}
// dock management functions -------------------------------------------------------------------------------------
void dock_dead_dock_objects(object *objp1, int dockpoint1, object *objp2, int dockpoint2)
{
#ifndef NDEBUG
if ((dead_dock_find_instance(objp1, objp2) != NULL) || (dead_dock_find_instance(objp2, objp1) != NULL))
{
Error(LOCATION, "Trying to dock an object that's already docked!\n");
}
if ((dead_dock_find_instance(objp1, dockpoint1) != NULL) || (dead_dock_find_instance(objp2, dockpoint2) != NULL))
{
Error(LOCATION, "Trying to dock to a dockpoint that's in use!\n");
}
#endif
// put objects on each others' dock lists
dead_dock_add_instance(objp1, dockpoint1, objp2);
dead_dock_add_instance(objp2, dockpoint2, objp1);
}
void dock_dead_undock_objects(object *objp1, object *objp2)
{
#ifndef NDEBUG
if ((dead_dock_find_instance(objp1, objp2) == NULL) || (dead_dock_find_instance(objp2, objp1) == NULL))
{
Error(LOCATION, "Trying to undock an object that isn't docked!\n");
}
#endif
// remove objects from each others' dock lists
dead_dock_remove_instance(objp1, objp2);
dead_dock_remove_instance(objp2, objp1);
}
void dead_dock_add_instance(object *objp, int dockpoint, object *other_objp)
{
dock_instance *item;
// create item
item = (dock_instance *) vm_malloc(sizeof(dock_instance));
item->dockpoint_used = dockpoint;
item->docked_objp = other_objp;
// prepend item to existing list
item->next = objp->dead_dock_list;
objp->dead_dock_list = item;
}
void dead_dock_remove_instance(object *objp, object *other_objp)
{
int found = 0;
dock_instance *prev_ptr, *ptr;
prev_ptr = NULL;
ptr = objp->dead_dock_list;
// iterate until item found
while (ptr != NULL)
{
// if found, exit loop
if (ptr->docked_objp == other_objp)
{
found = 1;
break;
}
// iterate
prev_ptr = ptr;
ptr = ptr->next;
}
// delete if found
if (found)
{
// special case... found at beginning of list
if (prev_ptr == NULL)
{
objp->dead_dock_list = ptr->next;
}
// normal case
else
{
prev_ptr->next = ptr->next;
}
// delete it
vm_free(ptr);
}
}
dock_instance *dead_dock_find_instance(object *objp, object *other_objp)
{
dock_instance *ptr = objp->dead_dock_list;
// iterate until item found
while (ptr != NULL)
{
// if found, return it
if (ptr->docked_objp == other_objp)
return ptr;
// iterate
ptr = ptr->next;
}
// not found
return NULL;
}
dock_instance *dead_dock_find_instance(object *objp, int dockpoint)
{
dock_instance *ptr = objp->dead_dock_list;
// iterate until item found
while (ptr != NULL)
{
// if found, return it
if (ptr->dockpoint_used == dockpoint)
return ptr;
// iterate
ptr = ptr->next;
}
// not found
return NULL;
}
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