/**
 * \file
 *
 * \author	Georg Hopp
 *
 * \copyright
 * Copyright © 2014 Georg Hopp
 *
 * 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 __TR_INTERFACE_ITERABLE_H__
#define __TR_INTERFACE_ITERABLE_H__

#include "trbase.h"

typedef void * (* fptr_TR_iterableCurrent)(void *);
typedef void   (* fptr_TR_iterableNext)(void *);
typedef void   (* fptr_TR_iterableRewind)(void *);
typedef int    (* fptr_TR_iterableValid)(void *);

TR_INTERFACE(TR_Iterable) {
	TR_IFID;
	fptr_TR_iterableCurrent current;
	fptr_TR_iterableNext    next;
	fptr_TR_iterableRewind  rewind;
	fptr_TR_iterableValid   valid;
};

#define TR_iterableForeach(this) \
	TR_iterableRewind((this)); \
	for (; TR_iterableValid((this)); TR_iterableNext((this)))

inline
void *
TR_iterableCurrent(void * iterable)
{
	void * ret;
	TR_RETCALL(iterable, TR_Iterable, current, ret);
	return ret;
}

inline
void
TR_iterableNext(void * iterable)
{
	TR_CALL(iterable, TR_Iterable, next);
}

inline
void
TR_iterableRewind(void * iterable)
{
	TR_CALL(iterable, TR_Iterable, rewind);
}

inline
int
TR_iterableValid(void * iterable)
{
	int ret;
	TR_RETCALL(iterable, TR_Iterable, valid, ret);
	return ret;
}

#endif // __TR_INTERFACE_ITERABLE_H__

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