/*
 * darray.c
 *
 * Copyright (c) 2008-2016 Ruibang Luo <aquaskyline.com>.
 *
 * This file is part of SOAPdenovo.
 *
 * SOAPdenovo 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 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.  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 );
    }

  fprintf ( stderr, "Index %lld of the array is out of range and the size is %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 );
}