46 lines
1.0 KiB
C
46 lines
1.0 KiB
C
#include "arraylist.h"
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#include <stdlib.h>
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#include <stdio.h>
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ArrayList * list() {
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ArrayList *this = malloc(sizeof(ArrayList));
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this->capacity = 4;
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this->size = 0;
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this->items = malloc(this->capacity * sizeof(void *));
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return this;
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}
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void * get_list(ArrayList *this, int index) {
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if (index < 0 || this->size < index) {
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fprintf(stderr, "reading outside the bounds of an arraylist, index=%d, size=%d\n", index, this->size);
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exit(1);
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}
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return this->items[index];
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}
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void add_list(ArrayList *this, void *item) {
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if (this->size == this->capacity) {
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this->capacity *= 2;
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this->items = realloc(this->items, this->capacity * sizeof(void *));
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}
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this->items[this->size++] = item;
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}
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void * fold_list(ArrayList *this, void *init, void * (*f)(void *acc, int index, void *item)) {
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int i;
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for(i = 0; i < this->size; i++) {
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init = f(init, i, this->items[i]);
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}
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return init;
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}
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void * free_listitem(void *acc, int index, void *item) {
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free(item);
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return NULL;
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}
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void free_list(ArrayList *this) {
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free(this->items);
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free(this);
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}
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