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/*****************************************************************************/
/* Obj.c - A library for object list. */
/* */
/* Obj.c Copyright (c) 2000 Sakai Hiroaki. */
/* All Rights Reserved. */
/*****************************************************************************/
#include "ObjP.h"
/*****************************************************************************/
/* ObjListData */
/*****************************************************************************/
static ObjListData ObjListData_Create(Obj obj, Obj (*destructor)())
{
ObjListData list_data;
list_data = (ObjListData)malloc(sizeof(_ObjListData));
list_data->obj = obj;
list_data->destructor = destructor;
return (list_data);
}
static ObjListData ObjListData_Destroy(ObjListData list_data)
{
if (list_data == NULL) return (NULL);
/* ǥȥ饯μ¹ */
if (list_data->destructor)
(*(list_data->destructor))(list_data->obj);
free(list_data);
return (NULL);
}
/*****************************************************************************/
/* ObjList ֥Ȥ */
/*****************************************************************************/
Obj ObjListData_GetObj(ObjListData data)
{
if (data == NULL) return (NULL);
return (data->obj);
}
Obj ObjListData_GetPrev(ObjListData data)
{
if (data == NULL) return (NULL);
return (data->prev);
}
Obj ObjListData_GetNext(ObjListData data)
{
if (data == NULL) return (NULL);
return (data->next);
}
int ObjList_GetLength(ObjList list)
{
if (list == NULL) return (-1);
return (list->length);
}
ObjListData ObjList_GetStartEdge(ObjList list)
{
if (list == NULL) return (NULL);
return (list->start_edge);
}
ObjListData ObjList_GetEndEdge(ObjList list)
{
if (list == NULL) return (NULL);
return (list->end_edge);
}
ObjListData ObjList_GetStart(ObjList list)
{
if (list == NULL) return (NULL);
return (list->start_edge->next);
}
ObjListData ObjList_GetEnd(ObjList list)
{
if (list == NULL) return (NULL);
return (list->end_edge->prev);
}
int ObjList_IsEmpty(ObjList list)
{
if (list == NULL) return (1);
return (list->start_edge->next == list->end_edge);
}
int ObjList_IsStartEdge(ObjList list, ObjListData data)
{
if (list == NULL) return (0);
return (data == list->start_edge);
}
int ObjList_IsEndEdge(ObjList list, ObjListData data)
{
if (list == NULL) return (0);
return (data == list->end_edge);
}
int ObjList_IsStart(ObjList list, ObjListData data)
{
if (list == NULL) return (0);
return (data == list->start_edge->next);
}
int ObjList_IsEnd(ObjList list, ObjListData data)
{
if (list == NULL) return (0);
return (data == list->end_edge->prev);
}
ObjListData ObjList_InsertObjToPrev(ObjList list, ObjListData current,
Obj obj, Obj (*destructor)())
{
ObjListData data;
if (list == NULL) return (NULL);
if (ObjList_IsStartEdge(list, current)) return (NULL);
data = ObjListData_Create(obj, destructor);
if (data == NULL) return (NULL);
data->prev = current->prev;
data->next = current;
current->prev->next = data;
current->prev = data;
(list->length)++;
return (data);
}
ObjListData ObjList_InsertObjToNext(ObjList list, ObjListData current,
Obj obj, Obj (*destructor)())
{
ObjListData data;
if (list == NULL) return (NULL);
if (ObjList_IsEndEdge(list, current)) return (NULL);
data = ObjListData_Create(obj, destructor);
if (data == NULL) return (NULL);
data->next = current->next;
data->prev = current;
current->next->prev = data;
current->next = data;
(list->length)++;
return (data);
}
ObjListData ObjList_InsertObjToStart(ObjList list, Obj obj,
Obj (*destructor)())
{
ObjListData current;
current = ObjList_GetStart(list);
return (ObjList_InsertObjToPrev(list, current, obj, destructor));
}
ObjListData ObjList_InsertObjToEnd(ObjList list, Obj obj,
Obj (*destructor)())
{
ObjListData current;
current = ObjList_GetEnd(list);
return (ObjList_InsertObjToNext(list, current, obj, destructor));
}
ObjListData ObjList_DeleteObjToPrev(ObjList list, ObjListData current)
{
ObjListData ret;
if (list == NULL) return (NULL);
if (ObjList_IsStartEdge(list, current) || ObjList_IsEndEdge(list, current))
return (NULL);
current->prev->next = current->next;
current->next->prev = current->prev;
ret = current->prev;
ObjListData_Destroy(current);
(list->length)--;
return (ret);
}
ObjListData ObjList_DeleteObjToNext(ObjList list, ObjListData current)
{
ObjListData ret;
if (list == NULL) return (NULL);
if (ObjList_IsStartEdge(list, current) || ObjList_IsEndEdge(list, current))
return (NULL);
current->prev->next = current->next;
current->next->prev = current->prev;
ret = current->next;
ObjListData_Destroy(current);
(list->length)--;
return (ret);
}
ObjListData ObjList_DeleteObjFromStart(ObjList list)
{
ObjListData current;
if (list == NULL) return (NULL);
current = ObjList_GetStart(list);
return (ObjList_DeleteObjToNext(list, current));
}
ObjListData ObjList_DeleteObjFromEnd(ObjList list)
{
ObjListData current;
if (list == NULL) return (NULL);
current = ObjList_GetEnd(list);
return (ObjList_DeleteObjToPrev(list, current));
}
ObjListData ObjList_MoveObjToPrev(ObjList list,
ObjListData current,
ObjListData to)
{
if (list == NULL) return (NULL);
return (ObjList_MoveObjToPrevOfOtherList(list, current, list, to));
}
ObjListData ObjList_MoveObjToNext(ObjList list,
ObjListData current,
ObjListData to)
{
if (list == NULL) return (NULL);
return (ObjList_MoveObjToNextOfOtherList(list, current, list, to));
}
ObjListData ObjList_MoveObjToStart(ObjList list, ObjListData current)
{
if (list == NULL) return (NULL);
return (ObjList_MoveObjToStartOfOtherList(list, current, list));
}
ObjListData ObjList_MoveObjToEnd(ObjList list, ObjListData current)
{
if (list == NULL) return (NULL);
return (ObjList_MoveObjToEndOfOtherList(list, current, list));
}
ObjList ObjList_Create() /* ObjList ֥Ȥ */
{
ObjList list;
list = (ObjList)malloc(sizeof(_ObjList));
if (list == NULL) return (NULL);
list->start_edge = ObjListData_Create(NULL, NULL);
list->end_edge = ObjListData_Create(NULL, NULL);
list->length = 0; /* ¸ߤƤǡο */
list->start_edge->prev = NULL;
list->start_edge->next = list->end_edge;
list->end_edge->prev = list->start_edge;
list->end_edge->next = NULL;
return (list);
}
ObjList ObjList_Destroy(ObjList list) /* */
{
if (list == NULL) return (NULL);
while (!ObjList_IsEmpty(list))
ObjList_DeleteObjFromStart(list);
if (list->start_edge)
list->start_edge = ObjListData_Destroy(list->start_edge);
if (list->end_edge)
list->end_edge = ObjListData_Destroy(list->end_edge);
free(list);
return (NULL);
}
/*===========================================================================*/
/* ʣΥꥹȴ֤Ǥ */
/*===========================================================================*/
ObjListData ObjList_MoveObjToPrevOfOtherList(ObjList list, ObjListData current,
ObjList to_list, ObjListData to)
{
if (list == NULL) return (NULL);
if (to_list == NULL) return (NULL);
if (ObjList_IsStartEdge(list, current) || ObjList_IsEndEdge(list, current))
return (NULL);
if (ObjList_IsStartEdge(to_list, to)) return (NULL);
if ((list == to_list) && (current == to)) return (current);
current->prev->next = current->next;
current->next->prev = current->prev;
current->prev = to->prev;
current->next = to;
to->prev->next = current;
to->prev = current;
(list->length)--;
(to_list->length)++;
return (current);
}
ObjListData ObjList_MoveObjToNextOfOtherList(ObjList list, ObjListData current,
ObjList to_list, ObjListData to)
{
if (list == NULL) return (NULL);
if (ObjList_IsStartEdge(list, current) || ObjList_IsEndEdge(list, current))
return (NULL);
if (ObjList_IsEndEdge(to_list, to)) return (NULL);
if ((list == to_list) && (current == to)) return (current);
current->prev->next = current->next;
current->next->prev = current->prev;
current->next = to->next;
current->prev = to;
to->next->prev = current;
to->next = current;
(list->length)--;
(to_list->length)++;
return (current);
}
ObjListData ObjList_MoveObjToStartOfOtherList(ObjList list,
ObjListData current,
ObjList to_list)
{
ObjListData to;
if (list == NULL) return (NULL);
if (to_list == NULL) return (NULL);
to = ObjList_GetStart(to_list);
return (ObjList_MoveObjToPrevOfOtherList(list, current, to_list, to));
}
ObjListData ObjList_MoveObjToEndOfOtherList(ObjList list,
ObjListData current,
ObjList to_list)
{
ObjListData to;
if (list == NULL) return (NULL);
if (to_list == NULL) return (NULL);
to = ObjList_GetEnd(to_list);
return (ObjList_MoveObjToNextOfOtherList(list, current, to_list, to));
}
ObjList ObjList_Concatenate(ObjList list1, ObjList list2)
{
ObjListData tmp;
if (list1 == NULL) {
list1 = list2;
return (list1);
}
if (list2 == NULL) return (list1);
list1->end_edge->prev->next = list2->start_edge->next;
list2->start_edge->next->prev = list1->end_edge->prev;
tmp = list1->end_edge;
list1->end_edge = list2->end_edge;
list2->end_edge = tmp;
list2->start_edge->next = list2->end_edge;
list2->end_edge->prev = list2->start_edge;
list1->length += list2->length;
list2->length = 0;
ObjList_Destroy(list2);
return (list1);
}
/* End of File. */
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