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/*
* Copyright (c) 2011 Collabora Ltd.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* * Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and
* the following disclaimer in the documentation and/or
* other materials provided with the distribution.
* * The names of contributors to this software may not be
* used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
#include "config.h"
#include "ptr-array.h"
#include <stdlib.h>
#include <string.h>
struct ptr_array {
void **memory;
unsigned int length;
unsigned int allocated;
ptr_array_destroy_func destroy;
};
static int
maybe_expand_array (ptr_array_t *array,
unsigned int length)
{
unsigned int new_allocated;
void **new_memory;
if (length <= array->allocated)
return 1;
new_allocated = array->allocated + 16;
if (new_allocated < length)
new_allocated = length;
new_memory = realloc (array->memory, new_allocated * sizeof (void*));
if (new_memory == NULL)
return 0;
array->memory = new_memory;
array->allocated = new_allocated;
return 1;
}
ptr_array_t *
_p11_ptr_array_create (ptr_array_destroy_func destroy_func)
{
ptr_array_t *array;
array = calloc (1, sizeof (ptr_array_t));
if (array == NULL)
return NULL;
if (!maybe_expand_array (array, 2)) {
_p11_ptr_array_free (array);
return NULL;
}
array->destroy = destroy_func;
return array;
}
void
_p11_ptr_array_free (ptr_array_t *array)
{
unsigned int i;
if (array == NULL)
return;
if (array->destroy) {
for (i = 0; i < array->length; i++)
(array->destroy) (array->memory[i]);
}
free (array->memory);
free (array);
}
unsigned int
_p11_ptr_array_count (ptr_array_t *array)
{
return array->length;
}
int
_p11_ptr_array_add (ptr_array_t *array,
void *value)
{
if (!maybe_expand_array (array, array->length + 1))
return 0;
array->memory[array->length] = value;
array->length++;
return 1;
}
void
_p11_ptr_array_remove (ptr_array_t *array,
unsigned int index)
{
if (array->destroy)
(array->destroy) (array->memory[index]);
memmove (array->memory + index, array->memory + index + 1,
(array->length - (index + 1)) * sizeof (void*));
array->length--;
}
void *
_p11_ptr_array_at (ptr_array_t *array,
unsigned int index)
{
return array->memory[index];
}
void **
_p11_ptr_array_snapshot (ptr_array_t *array)
{
void **snapshot;
size_t bytes;
bytes = array->length * sizeof (void*);
snapshot = malloc (bytes);
if (!snapshot)
return NULL;
memcpy (snapshot, array->memory, bytes);
return snapshot;
}
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