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/*
* randutil.c
*
* Copyright (c) 2001 Dug Song <dugsong@monkey.org>
*
* $Id: randutil.c,v 1.1 2002/04/07 22:55:20 dugsong Exp $
*/
#include "config.h"
#include <dumbnet.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "randutil.h"
static const char base64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
void
rand_strset(rand_t *r, void *buf, size_t len)
{
uint32_t u;
char *p;
int i;
p = (char *)buf;
i = (len + 3) / 4;
u = rand_uint32(r);
/* XXX - more Duff's device tomfoolery. */
switch (len % 4) {
case 0: do {
u = rand_uint32(r);
*p++ = base64[(u >> 18) & 0x3f];
case 3:
*p++ = base64[(u >> 12) & 0x3f];
case 2:
*p++ = base64[(u >> 6) & 0x3f];
case 1:
*p++ = base64[(u >> 0) & 0x3f];
} while (--i > 0);
}
p[-1] = '\0';
}
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