#include <stdio.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
typedef struct
{
   unsigned int version; 
   const char  *name;
   int          id;
   int          not_saved_value; 
} My_Conf_Type;
typedef struct
{
   const char *server;
   int         port;
} My_Conf_Subtype;
static const char MY_CONF_FILE_ENTRY[] = "config";
static void
_my_conf_descriptor_init(void)
{
   
   
   
   
   
   
   
   
   
   
   
   
   
   
#define MY_CONF_ADD_BASIC(member, eet_type) \
  EET_DATA_DESCRIPTOR_ADD_BASIC             \
    (_my_conf_descriptor, My_Conf_Type, # member, member, eet_type)
#define MY_CONF_SUB_ADD_BASIC(member, eet_type) \
  EET_DATA_DESCRIPTOR_ADD_BASIC                 \
    (_my_conf_sub_descriptor, My_Conf_Subtype, # member, member, eet_type)
   
     (_my_conf_descriptor, My_Conf_Type, "subs", subs, _my_conf_sub_descriptor);
#undef MY_CONF_ADD_BASIC
#undef MY_CONF_SUB_ADD_BASIC
} 
static void
_my_conf_descriptor_shutdown(void)
{
} 
static My_Conf_Type *
_my_conf_new(void)
{
   My_Conf_Type *my_conf = calloc(1, sizeof(My_Conf_Type));
   My_Conf_Subtype *sub;
   if (!my_conf)
     {
        fprintf(stderr, "ERROR: could not calloc My_Conf_Type\n");
        return NULL;
     }
   my_conf->version = 0x112233;
   sub = calloc(1, sizeof(My_Conf_Subtype));
   if (sub)
     {
        sub->port = 1234;
     }
   return my_conf;
} 
static void
_my_conf_free(My_Conf_Type *my_conf)
{
   My_Conf_Subtype *sub;
     {
        free(sub);
     }
   free(my_conf);
} 
static My_Conf_Type *
_my_conf_load(const char *filename)
{
   My_Conf_Type *my_conf;
   if (!ef)
     {
        fprintf(stderr, "ERROR: could not open '%s' for read\n", filename);
        return NULL;
     }
   my_conf = 
eet_data_read(ef, _my_conf_descriptor, MY_CONF_FILE_ENTRY);
   if (!my_conf)
     goto end;
   if (my_conf->version < 0x112233)
     {
        fprintf(stderr,
                "WARNING: version %#x was too old, upgrading it to %#x\n",
                my_conf->version, 0x112233);
        my_conf->version = 0x112233;
     }
end:
   return my_conf;
} 
_my_conf_save(const My_Conf_Type *my_conf,
              const char         *filename)
{
   char tmp[PATH_MAX];
   unsigned int i, len;
   struct stat st;
   if (len + 12 >= (int)sizeof(tmp))
     {
        fprintf(stderr, "ERROR: file name is too big: %s\n", filename);
     }
   i = 0;
   do
     {
        snprintf(tmp + len, 12, ".%u", i);
        i++;
     }
   while (stat(tmp, &st) == 0);
   if (!ef)
     {
        fprintf(stderr, "ERROR: could not open '%s' for write\n", tmp);
     }
       (ef, _my_conf_descriptor, MY_CONF_FILE_ENTRY, my_conf, 
EINA_TRUE);
   if (ret)
     {
        unlink(filename);
        rename(tmp, filename);
     }
   return ret;
} 
int
main(int   argc,
     char *argv[])
{
   My_Conf_Type *my_conf;
   const My_Conf_Subtype *sub;
   int ret = 0;
   if (argc != 3)
     {
        fprintf(stderr, "Usage:\n\t%s <input> <output>\n\n", argv[0]);
        return -1;
     }
   _my_conf_descriptor_init();
   my_conf = _my_conf_load(argv[1]);
   if (!my_conf)
     {
        printf("creating new configuration.\n");
        my_conf = _my_conf_new();
        if (!my_conf)
          {
             ret = -2;
             goto end;
          }
     }
   printf("My_Conf_Type:\n"
          "\tversion: %#x\n"
          "\tname...: '%s'\n"
          "\tid.....: %d\n"
          "\tenabled: %hhu\n"
          "\tsubs...:\n",
          my_conf->version,
          my_conf->name ? my_conf->name : "",
          my_conf->id,
          my_conf->enabled);
     printf("\t\tserver: '%s', port: %d\n",
            sub->server ? sub->server : "",
            sub->port);
   if (!_my_conf_save(my_conf, argv[2]))
     ret = -3;
   _my_conf_free(my_conf);
end:
   _my_conf_descriptor_shutdown();
   return ret;
}