~drizzle-trunk/drizzle/development

/* Copyright (C) 2005 PrimeBase Technologies GmbH

 *

 * PrimeBase XT

 *

 * 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 St, Fifth Floor, Boston, MA 02110-1301 USA

 *

 * 2006-05-16	Paul McCullagh

 *

 * H&G2JCtL

 *

 * C++ Utilities

 */

#ifndef __ccutils_xt_h__

#define __ccutils_xt_h__

#include <errno.h>

#include "xt_defs.h"

#include "thread_xt.h"

class XTObject

{

	private:

	u_int			o_refcnt;

	public:

	inline XTObject() { o_refcnt = 1; }

	virtual ~XTObject() { }

	inline void reference() {

		o_refcnt++;

	}

	inline void release(XTThreadPtr self) {

		ASSERT(o_refcnt > 0);

		o_refcnt--;

		if (o_refcnt == 0) {

			finalize(self);

			delete this;

		}

	}

	virtual XTObject *factory(XTThreadPtr self) {

		XTObject *new_obj;

		if (!(new_obj = new XTObject()))

			xt_throw_errno(XT_CONTEXT, XT_ENOMEM);

		return new_obj;

	}

	virtual XTObject *clone(XTThreadPtr self) {

		XTObject *new_obj;

		new_obj = factory(self);

		new_obj->init(self, this);

		return new_obj;

	}

	virtual void init(XTThreadPtr self) { (void) self; }

	virtual void init(XTThreadPtr self, XTObject *obj) { (void) obj; init(self); }

	virtual void finalize(XTThreadPtr self) { (void) self; }

	virtual int compare(const void *key) { (void) key; return -1; }

};

class XTListImp

{

	protected:

	bool		li_referenced;

	u_int		li_item_count;

	XTObject	**li_items;

	public:

	inline XTListImp() : li_referenced(true), li_item_count(0), li_items(NULL) { }

	inline void setNonReferenced() { li_referenced = false; }

	void append(XTThreadPtr self, XTObject *info) {

		if (!xt_realloc(NULL, (void **) &li_items, (li_item_count + 1) * sizeof(void *))) {

			if (li_referenced)

				info->release(self);

			xt_throw_errno(XT_CONTEXT, XT_ENOMEM);

			return;

		}

		li_items[li_item_count] = info;

		li_item_count++;

	}

	void insert(XTThreadPtr self, XTObject *info, u_int i) {

		if (!xt_realloc(NULL, (void **) &li_items, (li_item_count + 1) * sizeof(void *))) {

			if (li_referenced)

				info->release(self);

			xt_throw_errno(XT_CONTEXT, XT_ENOMEM);

			return;

		}

		memmove(&li_items[i+1], &li_items[i], (li_item_count-i) * sizeof(XTObject *));

		li_items[i] = info;

		li_item_count++;

	}

	void addToFront(XTThreadPtr self, XTObject *info) {

		insert(self, info, 0);

	}

	/* Will sort! */

	void append(XTThreadPtr self, XTObject *info, void *key);

	inline bool remove(XTObject *info) {

		for (u_int i=0; i<li_item_count; i++) {

			if (li_items[i] == info) {

				li_item_count--;

				memmove(&li_items[i], &li_items[i+1], (li_item_count - i) * sizeof(XTObject *));

				return true;

			}

		}

		return false;

	}

	inline bool remove(XTThreadPtr self, u_int i) {

		XTObject *item;

		if (i >= li_item_count)

			return false;

		item = li_items[i];

		li_item_count--;

		memmove(&li_items[i], &li_items[i+1], (li_item_count - i) * sizeof(void *));

		if (li_referenced)

			item->release(self);

		return true;

	}

	inline XTObject *take(u_int i) {

		XTObject *item;

		if (i >= li_item_count)

			return NULL;

		item = li_items[i];

		li_item_count--;

		memmove(&li_items[i], &li_items[i+1], (li_item_count - i) * sizeof(void *));

		return item;

	}

	inline u_int size() const { return li_item_count; }

	inline void setEmpty(XTThreadPtr self) {

		if (li_items)

			xt_free(self, li_items);

		li_item_count = 0;

		li_items = NULL;

	}

	inline bool isEmpty() { return li_item_count == 0; }

	inline XTObject *itemAt(u_int i) const {

		if (i >= li_item_count)

			return NULL;

		return li_items[i];

	}

};

template <class T> class XTList : public XTListImp

{

	public:

	inline XTList() : XTListImp() { }

	inline void append(XTThreadPtr self, T *a) { XTListImp::append(self, a); }

	inline void insert(XTThreadPtr self, T *a, u_int i) { XTListImp::insert(self, a, i); }

	inline void addToFront(XTThreadPtr self, T *a) { XTListImp::addToFront(self, a); }

	inline bool remove(T *a) { return XTListImp::remove(a); }

	inline bool remove(XTThreadPtr self, u_int i) { return XTListImp::remove(self, i); }

	inline T *take(u_int i) { return (T *) XTListImp::take(i); }

	inline T *itemAt(u_int i) const { return (T *) XTListImp::itemAt(i); }

	inline u_int indexOf(T *a) {

		u_int i;

		for (i=0; i<size(); i++) {

			if (itemAt(i) == a)

				break;

		}

		return i;

	}

	void deleteAll(XTThreadPtr self)

	{

		for (u_int i=0; i<size(); i++) {

			if (li_referenced)

				itemAt(i)->release(self);

		}

		setEmpty(self);

	}

	void clone(XTThreadPtr self, XTListImp *list)

	{

		deleteAll(self);

		for (u_int i=0; i<list->size(); i++) {

			XTListImp::append(self, list->itemAt(i)->clone(self));

		}

	}

};

#endif