pvjc25/du6/list_ops.c

28 lines
894 B
C

#include "list_ops.h"
#include <string.h>
list_t *new_list(size_t length, list_element_t elements[]) {
list_t *list = malloc(sizeof(list_t) + sizeof(list_element_t) * length);
if (!list) return NULL;
list->length = length;
if (elements && length > 0) {
memcpy(list->elements, elements, sizeof(list_element_t) * length);
}
return list;
}
list_t *append_list(list_t *list1, list_t *list2) {
size_t len1 = list1 ? list1->length : 0;
size_t len2 = list2 ? list2->length : 0;
list_t *result = malloc(sizeof(list_t) + sizeof(list_element_t) * (len1 + len2));
if (!result) return NULL;
result->length = len1 + len2;
if (len1 > 0)
memcpy(result->elements, list1->elements, sizeof(list_element_t) * len1);
if (len2 > 0)
memcpy(result->elements + len1, list2->elements, sizeof(list_element_t) * len2);
return result;
}