/* compile using gcc -o zlib-test zlib-test.c -lz

   usage: zlib-test <compression-level> <string>

   where compression-level is from 0 to 9

*/

#include <stdio.h>

#include <zlib.h>

#include <string.h>

#include <stdlib.h>

int

main (int argc, char *argv[])

{

    unsigned char dest[32];

    unsigned long destLen = 31;

    int retval, i;

    int level;

    char *endptr;

    if (argc != 3) {

        fprintf (stderr, "Usage: %s: <compression-level> <string>\n", argv[0]);

        return 1;

    }

    level = strtol (argv[1], &endptr, 10);

    if (endptr == argv[1] || level < 0 || level > 9) {

        fprintf (stderr, "Invalid compression level\n");

        return 1;

    }

    retval = compress2 (dest, &destLen, (unsigned char *)argv[2], strlen (argv[2]), level);

    if (retval != Z_OK) {

        fprintf (stderr, "Error calling zlib compress2 function: %d\n", retval);

        return 1;

    }

    for (i = 0; i < destLen; i++)

        printf ("\\x%02hhx", dest[i]);

    printf ("\n");

    return 0;

}