104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
#include "list_ops.h"
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#include <stdlib.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 = malloc(sizeof(list_t) + sizeof(list_element_t) * length);
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if (!list) return NULL;
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list->length = length;
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for (size_t i = 0; i < length; ++i) {
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list->elements[i] = elements[i];
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}
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return 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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list_t *append_list(list_t *list1, list_t *list2) {
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size_t new_length = list1->length + list2->length;
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list_t *new_list = malloc(sizeof(list_t) + sizeof(list_element_t) * new_length);
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if (!new_list) return NULL;
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new_list->length = new_length;
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for (size_t i = 0; i < list1->length; ++i) {
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new_list->elements[i] = list1->elements[i];
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}
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for (size_t i = 0; i < list2->length; ++i) {
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new_list->elements[list1->length + i] = list2->elements[i];
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}
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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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list_element_t *temp = malloc(sizeof(list_element_t) * list->length);
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if (!temp) return NULL;
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size_t new_length = 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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temp[new_length++] = list->elements[i];
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}
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}
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list_t *new_list = malloc(sizeof(list_t) + sizeof(list_element_t) * new_length);
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if (!new_list) {
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free(temp);
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return NULL;
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}
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new_list->length = new_length;
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for (size_t i = 0; i < new_length; ++i) {
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new_list->elements[i] = temp[i];
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}
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free(temp);
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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 = malloc(sizeof(list_t) + sizeof(list_element_t) * list->length);
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if (!new_list) return NULL;
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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 result = initial;
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for (size_t i = 0; i < list->length; ++i) {
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result = foldl(result, list->elements[i]);
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}
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return result;
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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 result = initial;
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for (size_t i = list->length; i > 0; --i) {
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result = foldr(list->elements[i - 1], result);
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}
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return result;
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}
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list_t *reverse_list(list_t *list) {
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list_t *new_list = malloc(sizeof(list_t) + sizeof(list_element_t) * list->length);
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if (!new_list) return NULL;
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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 - 1 - i];
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}
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return new_list;
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}
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