adler32 example using zlib

#include <stdlib.h>
#include <stdio.h>

#include <zlib.h>

#define BUF 0x200

int main(int argc, char** argv)
{
    unsigned char buf[BUF];
    unsigned long adler = adler32(0, Z_NULL, 0);

    size_t len;
    while((len = fread(buf, sizeof(unsigned char), BUF, stdin)) != 0) {
        adler = adler32(adler, buf, len);
    }

    printf("0x%08lx\n", adler);
    return EXIT_SUCCESS;
}