addFirst

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "doublylinkedlist.h"

int main() {
    DoublyLinkedList ll;
    DoublyLinkedList_init(&ll);
    char line[256];
    while (fgets(line, sizeof(line), stdin)) {
        line[strcspn(line, "\r\n")] = '\0';
        char* cmd = strtok(line, " \t");
        if (!cmd) continue;
        if (strcmp(cmd, "state") == 0) printf("%s %s %d\n", ll.head == NULL ? "true" : "false", ll.tail == NULL ? "true" : "false", ll.count);
        if (strcmp(cmd, "count") == 0) printf("%d\n", ll.count);
        if (strcmp(cmd, "headValue") == 0) printf("%d\n", Node_getValue(ll.head));
        if (strcmp(cmd, "tailValue") == 0) printf("%d\n", Node_getValue(ll.tail));
        if (strcmp(cmd, "addFirst") == 0) {
            char* arg = strtok(NULL, " \t");
            DoublyLinkedList_addFirst(&ll, atoi(arg));
        }
    }
    return 0;
}