/*
 * Darray.c
 * 
 * Copyright (c) 2011-2013 BGI-Shenzhen <soap at genomics dot org dot cn>. 
 *
 * This file is part of SOAPdenovo-Trans.
 *
 * SOAPdenovo-Trans 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.
 *
 * SOAPdenovo-Trans 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 SOAPdenovo-Trans.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "darray.h"
#include "check.h"

DARRAY *createDarray (int num_items, size_t unit_size)
{
	DARRAY *newDarray = (DARRAY *) malloc (1 * sizeof (DARRAY));

	newDarray->array_size = num_items;
	newDarray->item_size = unit_size;
	newDarray->item_c = 0;
	newDarray->array = (void *) ckalloc (num_items * unit_size);
	return newDarray;
}

void *darrayPut (DARRAY * darray, long long index)
{
	int i = 2;

	if (index + 1 > darray->item_c)
	{
		darray->item_c = index + 1;
	}

	if (index < darray->array_size)
	{
		return darray->array + darray->item_size * index;
	}

	while (index > i * darray->array_size)
	{
		i++;
	}

	darray->array = (void *) ckrealloc (darray->array, i * darray->array_size * darray->item_size, darray->array_size * darray->item_size);
	darray->array_size *= i;
	return (void *) ((void *) darray->array + darray->item_size * index);
}

void *darrayGet (DARRAY * darray, long long index)
{
	if (index < darray->array_size)
	{
		return (void *) ((void *) darray->array + darray->item_size * index);
	}

	printf ("array read index %lld out of range %lld\n", index, darray->array_size);
	return NULL;
}

void emptyDarray (DARRAY * darray)
{
	darray->item_c = 0;
}

void freeDarray (DARRAY * darray)
{
	if (!darray)
	{
		return;
	}

	if (darray->array)
	{
		free ((void *) darray->array);
	}

	free ((void *) darray);
}