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/*
* Copyright (C) 2000-2006 the xine project
*
* This file is part of xine, a free video player.
*
* xine 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.
*
* xine 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*
* $Id: array.c,v 1.4 2007/02/03 16:31:55 dsalt Exp $
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include "attributes.h"
#include "array.h"
#define MIN_CHUNK_SIZE 32
/* Array internal struct */
struct xine_array_s {
void **chunk;
size_t chunk_size;
size_t size;
};
static void xine_array_ensure_chunk_size(xine_array_t *array, size_t size) {
if (size > array->chunk_size) {
/* realloc */
size_t new_size = 2 * array->chunk_size;
array->chunk = (void**)realloc(array->chunk, sizeof(void *) * new_size);
array->chunk_size = new_size;
}
}
/* Constructor */
xine_array_t *xine_array_new(size_t initial_size) {
xine_array_t *new_array;
new_array = (xine_array_t *)malloc(sizeof(xine_array_t));
if (!new_array)
return NULL;
if (initial_size < MIN_CHUNK_SIZE)
initial_size = MIN_CHUNK_SIZE;
new_array->chunk = (void**)malloc(sizeof(void*) * initial_size);
if (!new_array->chunk) {
free(new_array);
return NULL;
}
new_array->chunk_size = initial_size;
new_array->size = 0;
return new_array;
}
/* Destructor */
void xine_array_delete(xine_array_t *array) {
if (array->chunk) {
free(array->chunk);
}
free(array);
}
size_t xine_array_size(const xine_array_t *array) {
return array->size;
}
void xine_array_clear(xine_array_t *array) {
array->size = 0;
}
void xine_array_add(xine_array_t *array, void *value) {
xine_array_ensure_chunk_size(array, array->size + 1);
array->chunk[array->size] = value;
array->size++;
}
void xine_array_insert(xine_array_t *array, unsigned int position, void *value) {
if (position < array->size) {
xine_array_ensure_chunk_size(array, array->size + 1);
memmove(&array->chunk[position + 1],
&array->chunk[position],
sizeof(void *) * (array->size - position));
array->chunk[position] = value;
array->size++;
} else {
xine_array_add(array, value);
}
}
void xine_array_remove(xine_array_t *array, unsigned int position) {
if (array->size > 0) {
if (position < array->size) {
memmove(&array->chunk[position],
&array->chunk[position + 1],
sizeof(void *) * (array->size - (position + 1)));
}
array->size--;
}
}
void *xine_array_get(const xine_array_t *array, unsigned int position) {
if (position < array->size)
return array->chunk[position];
else
return NULL;
}
void xine_array_set(xine_array_t *array, unsigned int position, void *value) {
if (position < array->size)
array->chunk[position] = value;
}
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