libuuid sample program

uuid_test.c

//
//  libuuid sample program
//
//  library install for debian
//      $ sudo apt-get install uuid-dev
//
//  compile
//      $ gcc uuid_test.c -luuid -o uuid_test
//
#include <stdio.h>
#include <uuid/uuid.h>

int main(int argc, char *argv[])
{
        // typedef unsigned char uuid_t[16];
        uuid_t uuid;

        // generate
        uuid_generate_time_safe(uuid);

        // unparse (to string)
        char uuid_str[37];      // ex. "1b4e28ba-2fa1-11d2-883f-0016d3cca427" + "\0"
        uuid_unparse_lower(uuid, uuid_str);
        printf("generate uuid=%s\n", uuid_str);

        // parse (from string)
        uuid_t uuid2;
        uuid_parse(uuid_str, uuid2);

        // compare (rv == 0)
        int rv;
        rv = uuid_compare(uuid, uuid2);
        printf("uuid_compare() result=%d\n", rv);

        // compare (rv == 1)
        uuid_t uuid3;
        uuid_parse("1b4e28ba-2fa1-11d2-883f-0016d3cca427", uuid3);
        rv = uuid_compare(uuid, uuid3);
        printf("uuid_compare() result=%d\n", rv);

        // is null? (rv == 0)
        rv = uuid_is_null(uuid);
        printf("uuid_null() result=%d\n", rv);

        // is null? (rv == 1)
        uuid_clear(uuid);
        rv = uuid_is_null(uuid);
        printf("uuid_null() result=%d\n", rv);

        return 0;
}