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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 2
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef SCI_GRAPHICS_LISTS32_H
#define SCI_GRAPHICS_LISTS32_H
#include "common/array.h"
namespace Sci {
/**
* StablePointerArray holds pointers in a fixed-size array
* that maintains position of erased items until `pack` is
* called. It is used by DrawList, RectList, and
* ScreenItemList. StablePointerArray takes ownership of
* all pointers that are passed to it and deletes them when
* calling `erase` or when destroying the
* StablePointerArray.
*/
template <class T, uint N>
class StablePointerArray {
uint _size;
T *_items[N];
public:
typedef T **iterator;
typedef T *const *const_iterator;
typedef T *value_type;
typedef uint size_type;
StablePointerArray() : _size(0), _items() {}
StablePointerArray(const StablePointerArray &other) : _size(other._size) {
for (size_type i = 0; i < _size; ++i) {
if (other._items[i] == nullptr) {
_items[i] = nullptr;
} else {
_items[i] = new T(*other._items[i]);
}
}
}
~StablePointerArray() {
for (size_type i = 0; i < _size; ++i) {
delete _items[i];
}
}
void operator=(const StablePointerArray &other) {
clear();
_size = other._size;
for (size_type i = 0; i < _size; ++i) {
if (other._items[i] == nullptr) {
_items[i] = nullptr;
} else {
_items[i] = new T(*other._items[i]);
}
}
}
T *const &operator[](size_type index) const {
assert(index < _size);
return _items[index];
}
T *&operator[](size_type index) {
assert(index < _size);
return _items[index];
}
/**
* Adds a new pointer to the array.
*/
void add(T *item) {
assert(_size < N);
_items[_size++] = item;
}
iterator begin() {
return _items;
}
const_iterator begin() const {
return _items;
}
void clear() {
for (size_type i = 0; i < _size; ++i) {
delete _items[i];
_items[i] = nullptr;
}
_size = 0;
}
iterator end() {
return _items + _size;
}
const_iterator end() const {
return _items + _size;
}
/**
* Erases the object pointed to by the given iterator.
*/
void erase(T *item) {
for (iterator it = begin(); it != end(); ++it) {
if (*it == item) {
delete *it;
*it = nullptr;
break;
}
}
}
/**
* Erases the object pointed to by the given iterator.
*/
void erase(iterator &it) {
assert(it >= _items && it < _items + _size);
delete *it;
*it = nullptr;
}
/**
* Erases the object pointed to at the given index.
*/
void erase_at(size_type index) {
assert(index < _size);
delete _items[index];
_items[index] = nullptr;
}
/**
* Removes freed pointers from the pointer list.
*/
size_type pack() {
iterator freePtr = begin();
size_type newSize = 0;
for (iterator it = begin(), last = end(); it != last; ++it) {
if (*it != nullptr) {
*freePtr = *it;
++freePtr;
++newSize;
}
}
_size = newSize;
return newSize;
}
/**
* The number of populated slots in the array. The size
* of the array will only go down once `pack` is called.
*/
size_type size() const {
return _size;
}
};
template <typename T>
class FindByObject {
const reg_t &_object;
public:
FindByObject(const reg_t &object) : _object(object) {}
bool operator()(const T entry) const {
return entry && entry->_object == _object;
}
};
}
#endif
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