#include <zlib.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <err.h>

uint8_t data[1 * 1024 * 1024];

int main(int argc, char **argv)
{
    z_stream strm = {0};
    uint8_t *buf;
    uint32_t count;
    uint32_t bound;

    count = fread(data, 1, sizeof data, stdin);

    if (count <= 0) {
        warnx("no data was provided, so cannot deflate");
        return 0;
    }

    deflateInit2(&strm,
                 Z_DEFAULT_COMPRESSION,
                 Z_DEFLATED,
                 15,
                 1,
                 Z_FIXED);

    bound = deflateBound(&strm, count);
    buf   = malloc(bound);

    strm.avail_out  = bound;
    strm.next_out   = buf;
    strm.next_in    = data;
    strm.avail_in   = count;

    deflate(&strm, Z_FINISH);
    deflateEnd(&strm);
    free(buf);
    return 0;
}