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#include "list.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
list_t *create_list(void) {
list_t *list = malloc(sizeof(list_t));
list->capacity = 10;
list->length = 0;
list->items = malloc(sizeof(void*) * list->capacity);
return list;
}
static void list_resize(list_t *list) {
if (list->length == list->capacity) {
list->capacity += 10;
list->items = realloc(list->items, sizeof(void*) * list->capacity);
}
}
void list_free(list_t *list) {
if (list == NULL) {
return;
}
free(list->items);
free(list);
}
void list_add(list_t *list, void *item) {
list_resize(list);
list->items[list->length++] = item;
}
void list_insert(list_t *list, int index, void *item) {
list_resize(list);
memmove(&list->items[index + 1], &list->items[index], sizeof(void*) * (list->length - index));
list->length++;
list->items[index] = item;
}
void list_del(list_t *list, int index) {
list->length--;
memmove(&list->items[index], &list->items[index + 1], sizeof(void*) * (list->length - index));
}
void list_cat(list_t *list, list_t *source) {
int i;
for (i = 0; i < source->length; ++i) {
list_add(list, source->items[i]);
}
}
// pass the pointer of the object we care about to the comparison function
static int list_cmp(const void *l, const void *r, void *_cmp) {
int (*cmp)(const void *, const void *) = _cmp;
return cmp(*(void**)l, *(void**)r);
}
void list_sort(list_t *list, int compare(const void *left, const void *right)) {
qsort_r(list->items, list->length, sizeof(void *), list_cmp, compare);
}
int list_seq_find(list_t *list, int compare(const void *item, const void *data), const void *data) {
for (int i = 0; i < list->length; i++) {
void *item = list->items[i];
if (compare(item, data) == 0) {
return i;
}
}
return -1;
}
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