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/*
* libkmod - interface to kernel module operations
*
* Copyright (C) 2011-2013 ProFUSION embedded systems
*
* 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/>.
*/
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <shared/array.h>
/* basic pointer array growing in steps */
static int array_realloc(struct array *array, size_t new_total)
{
void *tmp = realloc(array->array, sizeof(void *) * new_total);
if (tmp == NULL)
return -ENOMEM;
array->array = tmp;
array->total = new_total;
return 0;
}
void array_init(struct array *array, size_t step)
{
assert(step > 0);
array->array = NULL;
array->count = 0;
array->total = 0;
array->step = step;
}
int array_append(struct array *array, const void *element)
{
size_t idx;
if (array->count + 1 >= array->total) {
int r = array_realloc(array, array->total + array->step);
if (r < 0)
return r;
}
idx = array->count;
array->array[idx] = (void *)element;
array->count++;
return idx;
}
int array_append_unique(struct array *array, const void *element)
{
void **itr = array->array;
void **itr_end = itr + array->count;
for (; itr < itr_end; itr++)
if (*itr == element)
return -EEXIST;
return array_append(array, element);
}
void array_pop(struct array *array) {
array->count--;
if (array->count + array->step < array->total) {
int r = array_realloc(array, array->total - array->step);
if (r < 0)
return;
}
}
void array_free_array(struct array *array) {
free(array->array);
array->count = 0;
array->total = 0;
}
void array_sort(struct array *array, int (*cmp)(const void *a, const void *b))
{
qsort(array->array, array->count, sizeof(void *), cmp);
}
int array_remove_at(struct array *array, unsigned int pos)
{
if (array->count <= pos)
return -ENOENT;
array->count--;
if (pos < array->count)
memmove(array->array + pos, array->array + pos + 1,
sizeof(void *) * (array->count - pos));
if (array->count + array->step < array->total) {
int r = array_realloc(array, array->total - array->step);
/* ignore error */
if (r < 0)
return 0;
}
return 0;
}
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