103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
#include "list_ops.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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if (length && elements)
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memcpy(list->elements, elements, sizeof(list_element_t) * length);
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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_ptr = malloc(sizeof(list_t) + sizeof(list_element_t) * new_length);
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if (!new_list_ptr) return NULL;
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new_list_ptr->length = new_length;
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for (size_t i = 0; i < list1->length; i++) {
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new_list_ptr->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_ptr->elements[list1->length + i] = list2->elements[i];
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}
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return new_list_ptr;
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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])) count++;
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}
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list_t *new_list_ptr = malloc(sizeof(list_t) + sizeof(list_element_t) * count);
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if (!new_list_ptr) return NULL;
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new_list_ptr->length = count;
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size_t index = 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_ptr->elements[index++] = list->elements[i];
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}
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}
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return new_list_ptr;
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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_ptr = malloc(sizeof(list_t) + sizeof(list_element_t) * list->length);
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if (!new_list_ptr) return NULL;
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new_list_ptr->length = list->length;
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for (size_t i = 0; i < list->length; i++) {
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new_list_ptr->elements[i] = map(list->elements[i]);
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}
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return new_list_ptr;
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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 (int i = (int)list->length - 1; i >= 0; i--) {
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result = foldr(list->elements[i], 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_ptr = malloc(sizeof(list_t) + sizeof(list_element_t) * list->length);
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if (!new_list_ptr) return NULL;
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new_list_ptr->length = list->length;
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for (size_t i = 0; i < list->length; i++) {
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new_list_ptr->elements[i] = list->elements[list->length - i - 1];
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}
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return new_list_ptr;
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}
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