106 lines
3.0 KiB
C
106 lines
3.0 KiB
C
#include "list_ops.h"
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#include <stdlib.h>
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#include <stdbool.h>
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#include <string.h>
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list_t *new_list(size_t length, list_element_t elements[]) {
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list_t* list = (list_t*)malloc(sizeof(list_t) + length * sizeof(list_element_t));
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if (list == NULL) {
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return NULL;
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}
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list->length = length;
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memcpy(list->elements, elements, length * sizeof(list_element_t));
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return list;
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}
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list_t *append_list(list_t *list1, list_t *list2) {
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size_t total_length = list1->length + list2->length;
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list_t* new_list = (list_t*)malloc(sizeof(list_t) + total_length * sizeof(list_element_t));
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if (new_list == NULL) {
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return NULL;
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}
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new_list->length = total_length;
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memcpy(new_list->elements, list1->elements, list1->length * sizeof(list_element_t));
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memcpy(new_list->elements + list1->length, list2->elements, list2->length * sizeof(list_element_t));
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return new_list;
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}
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list_t *filter_list(list_t *list, bool (*filter)(list_element_t)) {
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size_t count = 0;
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for (size_t i = 0; i < list->length; ++i) {
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if (filter(list->elements[i])) {
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count++;
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}
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}
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list_t* new_list = (list_t*)malloc(sizeof(list_t) + count * sizeof(list_element_t));
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if (new_list == NULL) {
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return NULL;
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}
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size_t j = 0;
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for (size_t i = 0; i < list->length; ++i) {
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if (filter(list->elements[i])) {
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new_list->elements[j++] = list->elements[i];
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}
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}
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new_list->length = count;
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return new_list;
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}
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size_t length_list(list_t *list) {
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return list->length;
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}
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list_t *map_list(list_t *list, list_element_t (*map)(list_element_t)) {
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list_t* new_list = (list_t*)malloc(sizeof(list_t) + list->length * sizeof(list_element_t));
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if (new_list == NULL) {
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return NULL;
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}
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new_list->length = list->length;
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for (size_t i = 0; i < list->length; ++i) {
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new_list->elements[i] = map(list->elements[i]);
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}
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return new_list;
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}
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list_element_t foldl_list(list_t *list, list_element_t initial,
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list_element_t (*foldl)(list_element_t, list_element_t)) {
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list_element_t accumulator = initial;
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for (size_t i = 0; i < list->length; ++i) {
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accumulator = foldl(accumulator, list->elements[i]);
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}
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return accumulator;
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}
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list_element_t foldr_list(list_t *list, list_element_t initial,
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list_element_t (*foldr)(list_element_t, list_element_t)) {
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list_element_t accumulator = initial;
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for (size_t i = list->length; i > 0; --i) {
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accumulator = foldr(list->elements[i - 1], accumulator);
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}
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return accumulator;
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}
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list_t *reverse_list(list_t *list) {
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list_t* new_list = (list_t*)malloc(sizeof(list_t) + list->length * sizeof(list_element_t));
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if (new_list == NULL) {
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return NULL;
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}
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new_list->length = list->length;
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for (size_t i = 0; i < list->length; ++i) {
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new_list->elements[i] = list->elements[list->length - i - 1];
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}
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return new_list;
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}
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void delete_list(list_t *list) {
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free(list);
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}
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