r8825@totoro: nickm | 2006-10-01 17:41:27 -0400

  }

}

/** Return a pseudorandom integer, chosen uniformly from the values

 * between 0 and max-1. */

uint64_t

crypto_rand_uint64(uint64_t max)

{

  uint64_t val;

  uint64_t cutoff;

  tor_assert(max < UINT64_MAX);

  tor_assert(max > 0); /* don't div by 0 */

  /* We ignore any values that are >= 'cutoff,' to avoid biasing the

   * distribution with clipping at the upper end of unsigned int's

   * range.

   */

  cutoff = UINT64_MAX - (UINT64_MAX%max);

  while (1) {

    crypto_rand((char*)&val, sizeof(val));

    if (val < cutoff)

      return val % max;

  }

}

/** Return a randomly chosen element of sl; or NULL if sl is empty.

 */

void *

#define CRYPTO_H_ID "$Id$"

#include <stdio.h>

#include "torint.h"

/** Length of the output of our message digest. */

#define DIGEST_LEN 20

int crypto_seed_rng(void);

int crypto_rand(char *to, size_t n);

int crypto_rand_int(unsigned int max);

uint64_t crypto_rand_uint64(uint64_t max);

struct smartlist_t;

void *smartlist_choose(const struct smartlist_t *sl);