C++ (Cpp) mt_init_by_array Exemples

Exemple #1

void
lwmsg_session_generate_cookie(
    LWMsgSessionCookie* cookie
    )
{
    mt m;
    uint32_t seed[3];
    uint32_t s;
    int i;
    LWMsgTime now;

    lwmsg_time_now(&now);

    /* Add in 32 bits of data from the address of the cookie */
    seed[0] = (uint32_t) (size_t) cookie;
    /* Add in 32 bits of data from the current pid */
    seed[1] = (uint32_t) getpid();
    /* Add in 32 bits of data from the current time */
    seed[2] = (uint32_t) now.microseconds;
        
    mt_init_by_array(&m, seed, sizeof(seed) / sizeof(*seed));
        
    for (i = 0; i < sizeof(cookie->bytes); i += sizeof(s))
    {
        s = mt_genrand_int32(&m);
        
        memcpy(cookie->bytes + i, &s, sizeof(s));
    }
}

Exemple #2

Fichier : test.c Projet : Iced-Tea/sjs

void main(void){
    mt_t mt;
    uint32_t init[4] = {61731, 24903, 614, 42143};
    unsigned int length = 4;

    mt_init_by_array(&mt, init, length);
    for (int i = 0; i < 2000; i++) {
        printf("%.16f ", mt_genrand_res53(&mt));
        if (i%5==4)
            printf("\n");
    }
}