source: vendor/glibc-tests/glibc/catgets/tst-catgets.c

#include <mcheck.h>
#include <nl_types.h>
#include <stdio.h>
#include <string.h>


static const char *msgs[] =
{
#define INPUT(str)
#define OUTPUT(str) str,
#include <intl/msgs.h>
};
#define nmsgs (sizeof (msgs) / sizeof (msgs[0]))

#define ROUNDS 5

int
main (void)
{
  int rnd;
  int result = 0;

  mtrace ();

  /* We do this a few times to stress the memory handling.  */
  for (rnd = 0; rnd < ROUNDS; ++rnd)
    {
      nl_catd cd = catopen ("libc", 0);
      size_t cnt;

      if (cd == (nl_catd) -1)
        {
          printf ("cannot load catalog: %m\n");
          result = 1;
          break;
        }

      /* Go through all the messages and compare the result.  */
      for (cnt = 0; cnt < nmsgs; ++cnt)
        {
          char *trans;

          trans = catgets (cd, 1, 1 + cnt,
                           "+#+# if this comes backs it's an error");

          if (trans == NULL)
            {
              printf ("catgets return NULL for %zd\n", cnt);
              result = 1;
            }
          else if (strcmp (trans, msgs[cnt]) != 0 && msgs[cnt][0] != '\0')
            {
              printf ("expected \"%s\", got \"%s\"\n", msgs[cnt], trans);
              result = 1;
            }
        }

      if (catclose (cd) != 0)
        {
          printf ("catclose failed: %m\n");
          result = 1;
        }
    }

  return result;
}