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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef QDENGINE_QDCORE_QD_LIST_H
#define QDENGINE_QDCORE_QD_LIST_H
namespace QDEngine {
template <class Type> class qdList {
int numElements;
Type *firstElement;
void test(int code);
public:
qdList();
~qdList();
int size();
Type *first();
Type *last();
void clear();
void delete_all();
void insert(Type *p);
void append(Type *p);
void insert(Type *pointer, Type *p);
void append(Type *pointer, Type *p);
void remove(Type *p);
Type *search(int ID);
};
template <class Type>
inline void qdList<Type>::test(int code) {
#ifdef _XT_TEST_LIST_
Type *p = first();
int cnt = 0;
while (p) {
cnt++;
p = p->next;
}
if (cnt != numElements)
ErrH.Abort("List", XERR_USER, code);
#endif
}
template <class Type>
inline qdList<Type>::qdList() {
numElements = 0;
firstElement = 0;
}
template <class Type>
inline qdList<Type>::~qdList() {
clear();
}
template <class Type>
inline void qdList<Type>::clear() {
while (first())
remove(first());
}
template <class Type>
inline void qdList<Type>::delete_all() {
Type *p;
while ((p = first()) != 0) {
remove(p);
delete p;
}
}
template <class Type>
inline int qdList<Type>::size() {
return numElements;
}
template <class Type>
inline Type *qdList<Type>::first() {
return firstElement;
}
template <class Type>
inline Type *qdList<Type>::last() {
return firstElement ? firstElement->prev : 0;
}
template <class Type>
inline void qdList<Type>::insert(Type *p) {
if (p->list)
ErrH.Abort("Element is already in list");
numElements++;
if (firstElement) {
p->next = firstElement;
p->prev = firstElement->prev;
firstElement->prev = p;
} else {
p->prev = p;
p->next = 0;
}
firstElement = p;
p->list = this;
test(0);
}
template <class Type>
inline void qdList<Type>::insert(Type *pointer, Type *p) {
if (!firstElement || firstElement == pointer) {
insert(p);
return;
}
if (!pointer) {
append(p);
return;
}
if (p->list)
ErrH.Abort("Element is already in list");
numElements++;
p->next = pointer;
p->prev = pointer->prev;
pointer->prev->next = p;
pointer->prev = p;
p->list = this;
test(5);
}
template <class Type>
inline void qdList<Type>::append(Type *p) {
// if(p->list)
// ErrH.Abort("Element is already in list");
numElements++;
if (firstElement) {
p->next = 0;
p->prev = firstElement->prev;
firstElement->prev->next = p;
firstElement->prev = p;
} else {
p->next = 0;
p->prev = firstElement = p;
}
p->list = this;
test(1);
}
template <class Type>
inline void qdList<Type>::remove(Type *p) {
// if(p->list != this)
// ErrH.Abort("Removed element isn't in list");
numElements--;
if (p->next)
p->next->prev = p->prev;
else
firstElement->prev = p->prev;
if (p != firstElement)
p->prev->next = p->next;
else {
firstElement = p->next;
if (firstElement)
firstElement->prev = p->prev;
}
p->next = p->prev = 0;
p->list = 0;
test(2);
}
template <class Type>
inline Type *qdList<Type>::search(int ID) {
Type *p = first();
while (p) {
if (p->ID == ID)
return p;
p = p->next;
}
return 0;
}
} // namespace QDEngine
#endif // QDENGINE_QDCORE_QD_LIST_H
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