advice.c

/* vim: set ai et ts=4 sw=4: */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>

#define VERSION "0.3"

static const char* advices[] = {
    "Be yourself.",
    "A man can be himself only so long as he is alone, "
        "and if he does not love solitude, he will not love freedom, "
        "for it is only when he is alone that he is really free.",
    "Who are you? What do you want?",
    "A second chance! That’s the delusion. There never was to be but one. "
        "We work in the dark - we do what we can - we give what we have. "
        "Our doubt is our passion, and our passion is our task. "
        "The rest is the madness of art.",
    "And that's why you are dangerous. You've mastered your passions.",
    "Say what you know, do what you must, come what may.",
    "KISS",
    "DRY",
    "Performance is not a problem.",
    "To improve is to change; to be perfect is to change often.",
    "If you can't hack it you don't own it.",
    "Where other men blindly follow the truth, remember, nothing is true. "
        "Where other men are limited by morality or law, remember, everything is permitted.",
    "Know the rules well, so you can break them effectively.",
    "Choose to be optimistic, it feels better.",
    "One great question underlies our experience, whether we think about it or "
        "not: what is the purpose of life? ... From the moment of birth every "
        "human being wants happiness and does not want suffering. Neither social "
        "conditioning nor education nor ideology affects this. From the very core of "
        "our being, we simply desire contentment ... Therefore, it is important to "
        "discover what will bring about the greatest degree of happiness.",
    "Share your knowledge. It is a way to achieve immortality.",
    "There are two kinds of designs in this world: those that are useful, "
        "and those that you can formally prove to be correct.",
    "What I cannot create I do not understand.",
    "The best way to learn is by making mistakes.",
    "I would't like to be in your shoes, Connor. What could be worse than having to choose between two evils?",
    "Keep your expectations low boy, and you'll never be disappointed.",
    "Success is not final, failure is not fatal: it is the courage to continue that counts.",
};


unsigned int
hash(const unsigned char *data, const size_t data_len) {
    unsigned int hash = 0x4841434B;
    for(int i = 0; i < data_len; i++) {
        hash = ((hash << 5) + hash) + data[i];
    }
    return hash;
}

int
main(int argc, char* argv[])
{
    struct timeval time = {0};

    if(argc > 1)
    {
        if((strcmp(argv[1], "-v") == 0) || (strcmp(argv[1], "--version") == 0))
        {
            printf(
                    "advice v" VERSION "\n"
                    "(c) Aleksander Alekseev 2016-2018 | https://eax.me/\n"
                  );
            return 0;
        } else {
            fprintf(stderr, "Usage: %s [-v|--version]\n", argv[0]);
            return 1;
        }
    }

    gettimeofday(&time, NULL);

    /* srand((time.tv_sec * 1000) + (time.tv_usec / 1000)); */
    srand(hash((const unsigned char*)&time, sizeof(time)));

    int idx = (sizeof(advices)/sizeof(advices[0])) * (((double)rand()) / ((double)RAND_MAX+1.0));
    printf("%s\n", advices[idx]);
    return 0;
}