/* EINA - EFL data type library
 * Copyright (C) 2008 Cedric Bail
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library;
 * if not, see <http://www.gnu.org/licenses/>.
 */

#ifndef EINA_ARRAY_H_
#define EINA_ARRAY_H_

#include <stdlib.h>

#include "eina_config.h"

#include "eina_types.h"
#include "eina_error.h"
#include "eina_iterator.h"
#include "eina_accessor.h"
#include "eina_magic.h"

/**
 * @addtogroup Eina_Data_Types_Group Data Types
 *
 * @{
 */

/**
 * @addtogroup Eina_Containers_Group Containers
 *
 * @{
 */

/**
 * @defgroup Eina_Array_Group Array
 *
 * @{
 */

/**
 * @typedef Eina_Array
 * Type for a generic vector.
 */
typedef struct _Eina_Array Eina_Array;

/**
 * @typedef Eina_Array_Iterator
 * Type for an iterator on arrays, used with #EINA_ARRAY_ITER_NEXT.
 */
typedef void **Eina_Array_Iterator;

/**
 * @struct _Eina_Array
 * Type for an array of data.
 */
struct _Eina_Array
{
   void		**data;   /**< Pointer to a vector of pointer to payload */
   unsigned int   total;  /**< Total number of slot in the vector */
   unsigned int   count;  /**< Number of activ slot in the vector */
   unsigned int	  step;   /**< How much must we grow the vector when it is full */

   EINA_MAGIC
};

EAPI Eina_Array  *eina_array_new      (unsigned int step) EINA_WARN_UNUSED_RESULT EINA_MALLOC EINA_WARN_UNUSED_RESULT;
EAPI void         eina_array_free     (Eina_Array *array) EINA_ARG_NONNULL(1);
EAPI void         eina_array_step_set (Eina_Array *array, unsigned int step) EINA_ARG_NONNULL(1);
EAPI void         eina_array_clean    (Eina_Array *array) EINA_ARG_NONNULL(1);
EAPI void         eina_array_flush    (Eina_Array *array) EINA_ARG_NONNULL(1);
EAPI Eina_Bool    eina_array_remove   (Eina_Array *array, Eina_Bool (*keep)(void *data, void *gdata), void *gdata) EINA_ARG_NONNULL(1, 2);

static inline Eina_Bool     eina_array_push  (Eina_Array *array, const void *data) EINA_ARG_NONNULL(1, 2);
static inline void         *eina_array_pop   (Eina_Array *array) EINA_ARG_NONNULL(1);
static inline void         *eina_array_data_get (const Eina_Array *array, unsigned int index) EINA_ARG_NONNULL(1) EINA_PURE;
static inline void          eina_array_data_set (const Eina_Array *array, unsigned int index, const void *data) EINA_ARG_NONNULL(1, 3);
static inline unsigned int  eina_array_count_get (const Eina_Array *array) EINA_ARG_NONNULL(1) EINA_PURE;

EAPI Eina_Iterator *eina_array_iterator_new (const Eina_Array *array) EINA_MALLOC EINA_ARG_NONNULL(1) EINA_WARN_UNUSED_RESULT;
EAPI Eina_Accessor *eina_array_accessor_new (const Eina_Array *array) EINA_MALLOC EINA_ARG_NONNULL(1) EINA_WARN_UNUSED_RESULT;

/**
 * @def EINA_ARRAY_ITER_NEXT
 * @brief Macro to iterate over an array easily.
 *
 * @param array The array to iterate over.
 * @param index The integer number that is increased while itareting.
 * @param item The data
 * @param iterator The iterator
 *
 * This macro allow the iteration over @p array in an easy way. It
 * iterates from the first element to the last one. @p index is an
 * integer that increase from 0 to the number of elements. @p item is
 * the data of each element of @p array, so it is a pointer to a type
 * chosen by the user. @p iterator is of type #Eina_Array_Iterator.
 *
 * This macro can be used for freeing the data of an array, like in
 * the following example:
 *
 * @code
 * Eina_Array         *array;
 * char               *item;
 * Eina_Array_Iterator iterator;
 * unsigned int        i;
 *
 * // array is already filled,
 * // its elements are just duplicated strings,
 * // EINA_ARRAY_ITER_NEXT will be used to free those strings
 *
 * EINA_ARRAY_ITER_NEXT(array, i, item, iterator)
 *   free(item);
 * @endcode
 */
#define EINA_ARRAY_ITER_NEXT(array, index, item, iterator)		\
  for (index = 0, iterator = (array)->data; \
       (index < eina_array_count_get(array)) && ((item = *((iterator)++))); \
       ++(index))

#include "eina_inline_array.x"

/**
 * @}
 */

/**
 * @}
 */

/**
 * @}
 */

#endif
