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array.c
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array.c
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#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <keymap/array.h>
int
lk_array_init(struct lk_array *a, ssize_t memb, ssize_t size)
{
if (!a || memb < 0 || size < 0) {
errno = EINVAL;
return -EINVAL;
}
memset(a, 0, sizeof(struct lk_array));
a->array = calloc((size_t) size, (size_t) memb);
a->memb = memb;
a->total = size;
if (size && !a->array) {
errno = ENOMEM;
return -ENOMEM;
}
return 0;
}
int
lk_array_free(struct lk_array *a)
{
if (!a) {
errno = EINVAL;
return -EINVAL;
}
free(a->array);
memset(a, 0, sizeof(struct lk_array));
return 0;
}
int
lk_array_empty(struct lk_array *a)
{
if (!a) {
errno = EINVAL;
return -EINVAL;
}
memset(a->array, 0, (size_t) (a->memb * a->total));
a->count = 0;
return 0;
}
int
lk_array_exists(struct lk_array *a, ssize_t i)
{
char *s;
ssize_t k;
if (!a || i < 0 || i >= a->total) {
errno = EINVAL;
return 0;
}
s = (char *)(a->array + (a->memb * i));
for (k = 0; k < a->memb; k++) {
if (s[k] != 0)
return 1;
}
return 0;
}
void *
lk_array_get(struct lk_array *a, ssize_t i)
{
if (!a || i < 0 || i >= a->total) {
errno = EINVAL;
return NULL;
}
return a->array + (a->memb * i);
}
void *
lk_array_get_ptr(struct lk_array *a, ssize_t i)
{
void **ptr;
if (!a || i < 0 || i >= a->total) {
errno = EINVAL;
return NULL;
}
ptr = a->array;
return *(ptr + i);
}
static int
array_resize(struct lk_array *a, ssize_t i)
{
if (!a || i < 0) {
errno = EINVAL;
return -EINVAL;
}
if (i >= a->total) {
void *tmp = realloc(a->array, (size_t) (a->memb * (i + 1)));
if (!tmp) {
errno = ENOMEM;
return -ENOMEM;
}
memset(tmp + (a->memb * a->total), 0, (size_t) (a->memb * (i + 1 - a->total)));
a->array = tmp;
a->total = i + 1;
}
return 0;
}
int
lk_array_set(struct lk_array *a, ssize_t i, const void *e)
{
int ret = array_resize(a, i);
if (ret < 0)
return ret;
memcpy(a->array + (a->memb * i), e, (size_t) a->memb);
a->count++;
return 0;
}
int
lk_array_unset(struct lk_array *a, ssize_t i)
{
if (!a || i >= a->total) {
errno = EINVAL;
return -EINVAL;
}
if (lk_array_exists(a, i)) {
memset(a->array + (a->memb * i), 0, (size_t) a->memb);
a->count--;
}
return 0;
}
int
lk_array_append(struct lk_array *a, const void *e)
{
int ret = array_resize(a, a->count);
if (ret < 0)
return ret;
memcpy(a->array + (a->memb * a->count), e, (size_t) a->memb);
a->count++;
return 0;
}