#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

int * int_list_from_str(char * str);
int int_count_from_str(char * str);

int main(int argc, char *argv[]) {
    if (argc != 2) {
        printf("Usage: %s <string>\n", argv[0]);
        return -1;
    }

    printf("%d ints\n", int_count_from_str(argv[1]));
    /*int * list = int_list_from_str(argv[1]);
    for (int i=0; i<int_count_from_str(argv[1]); i++) {
        printf("%d ", list[i]);
    }*/

    return 0;
}

int * int_list_from_str(char * str) {
    int ico = int_count_from_str(str);
    int * list = malloc(sizeof(int)*ico);

    int len = strlen(str);
    
    int current_i = 0;
    int is_i = 1;
    int ic = 0;
    for (int i = 0; i < len; i++) {
        if (str[i] == ' ') {
            if ((i+1 < len && str[i+1] != ' ') || (i+1)==len) {
                list[ic] = current_i;
                ic++;
            }
            is_i = 0;
            current_i = 0;
        } else if (isdigit(str[i])) {
            if (is_i) {
                current_i *= 10;
            } else {
                is_i = 1;
            }
            current_i += (str[i] - '0');
        } else if (str[i]=='-' && current_i > 0) {
            current_i *= -1;
        } else {
            return 0;
        }
    }
    return list;
}

int int_count_from_str(char * str) {
    int ic = 0;
    int current_i = 0;
    int is_i = 1;

    int len = strlen(str);
    for (int i = 0; i < len; i++) {
        printf("str[%d]: %c\n", i, str[i]);
        if (str[i] == ' ') {
            if ((i+1 < len && str[i+1] != ' ') || (i+1)==len) ic++;
            is_i = 0;
            current_i = 0;
        } else if (isdigit(str[i])) {
            if (is_i) {
                current_i *= 10;
            } else {
                is_i = 1;
            }
            current_i += (str[i] - '0');
        } else if (str[i]=='-' && current_i > 0) {
            current_i *= -1;
        } else {
            return 0;
        }
    }
    return ic;
}