AoC18/day8p1/main.c

#include <stdio.h>

#include <glib.h>

int result = 0;

gchar **parse_node(gchar **node)
{
    int children = strtol(*node++, NULL, 0);
    int metadata = strtol(*node++, NULL, 0);

    for (int i = 0; i < children; i++) {
        node = parse_node(node);
    }

    for (int i = 0; i < metadata; i++) {
        result += strtol(*node++, NULL, 0);
    }

    return node;
}

int main()
{
    gchar *contents;
    gchar **strings;
    GError *err = NULL;

    g_file_get_contents("input", &contents, NULL, &err);
    if (err) {
        fprintf(stderr, "%s\n", err->message);
        g_error_free(err);
        return 1;
    }
    strings = g_strsplit(contents, " ", -1);
    g_free(contents);

    parse_node(strings);
    printf("%d\n", result);

    g_strfreev(strings);
    return 0;
}