source: zzuf/trunk/test/zzero.c @ 4253

Last change on this file since 4253 was 4253, checked in by sam, 4 years ago

Fix copyright information and remove Id tag everywhere.

File size: 846 bytes
Line 
1/*
2 *  zzero - check how many bits zzuf changes in a stream of zeroes
3 *  Copyright (c) 2008 Sam Hocevar <sam@hocevar.net>
4 *                All Rights Reserved
5 *
6 *  This program is free software. It comes without any warranty, to
7 *  the extent permitted by applicable law. You can redistribute it
8 *  and/or modify it under the terms of the Do What The Fuck You Want
9 *  To Public License, Version 2, as published by Sam Hocevar. See
10 *  http://sam.zoy.org/wtfpl/COPYING for more details.
11 */
12
13#include "config.h"
14
15#include <stdio.h>
16#include <stdlib.h>
17
18int main(void)
19{
20    static const int lut[16] =
21    {
22        0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4
23    };
24
25    int ones = 0, ch;
26
27    while((ch = getc(stdin)) != EOF)
28        ones += lut[ch & 0xf] + lut[(ch >> 4) & 0xf];
29
30    printf("%i\n", ones);
31
32    return EXIT_SUCCESS;
33}
34
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