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#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "array.h"
#include "util.h"
#define ARRAY_SIZE 16
void array_init(Array *arr) {
memset(arr, 0, sizeof *arr);
}
bool array_reserve(Array *arr, size_t count) {
if (count < ARRAY_SIZE)
count = ARRAY_SIZE;
if (arr->count < count) {
count = MAX(count, arr->count*2);
void **items = realloc(arr->items, count * sizeof(void*));
if (!items)
return false;
arr->count = count;
arr->items = items;
}
return true;
}
void array_release(Array *arr) {
if (!arr)
return;
free(arr->items);
array_init(arr);
}
void array_release_full(Array *arr) {
if (!arr)
return;
for (size_t i = 0; i < arr->len; i++)
free(arr->items[i]);
array_release(arr);
}
void array_clear(Array *arr) {
arr->len = 0;
if (arr->items)
memset(arr->items, 0, arr->count * sizeof(void*));
}
void *array_get(Array *arr, size_t idx) {
if (idx >= arr->len) {
errno = EINVAL;
return NULL;
}
return arr->items[idx];
}
bool array_set(Array *arr, size_t idx, void *item) {
if (idx >= arr->len) {
errno = EINVAL;
return false;
}
arr->items[idx] = item;
return true;
}
bool array_add(Array *arr, void *item) {
if (!array_reserve(arr, arr->len+1))
return false;
arr->items[arr->len++] = item;;
return true;
}
size_t array_length(Array *arr) {
return arr->len;
}
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