Exemplo n.º 1
0
/**
 * stringprep - prepare internationalized string
 * @in: input/ouput array with string to prepare.
 * @maxlen: maximum length of input/output array.
 * @flags: a #Stringprep_profile_flags value, or 0.
 * @profile: pointer to #Stringprep_profile to use.
 *
 * Prepare the input zero terminated UTF-8 string according to the
 * stringprep profile, and write back the result to the input string.
 *
 * Note that you must convert strings entered in the systems locale
 * into UTF-8 before using this function, see
 * stringprep_locale_to_utf8().
 *
 * Since the stringprep operation can expand the string, @maxlen
 * indicate how large the buffer holding the string is.  This function
 * will not read or write to characters outside that size.
 *
 * The @flags are one of #Stringprep_profile_flags values, or 0.
 *
 * The @profile contain the #Stringprep_profile instructions to
 * perform.  Your application can define new profiles, possibly
 * re-using the generic stringprep tables that always will be part of
 * the library, or use one of the currently supported profiles.
 *
 * Return value: Returns %STRINGPREP_OK iff successful, or an error code.
 **/
int
stringprep (char *in,
	    size_t maxlen,
	    Stringprep_profile_flags flags,
	    const Stringprep_profile * profile)
{
  int rc;
  char *utf8 = NULL;
  uint32_t *ucs4 = NULL;
  size_t ucs4len, maxucs4len, adducs4len = 50;

  do
    {
      uint32_t *newp;

      if (ucs4)
	free (ucs4);
      ucs4 = stringprep_utf8_to_ucs4 (in, -1, &ucs4len);
      maxucs4len = ucs4len + adducs4len;
      newp = realloc (ucs4, maxucs4len * sizeof (uint32_t));
      if (!newp)
	{
	  free (ucs4);
	  return STRINGPREP_MALLOC_ERROR;
	}
      ucs4 = newp;

      rc = stringprep_4i (ucs4, &ucs4len, maxucs4len, flags, profile);
      adducs4len += 50;
    }
  while (rc == STRINGPREP_TOO_SMALL_BUFFER);
  if (rc != STRINGPREP_OK)
    {
      free (ucs4);
      return rc;
    }

  utf8 = stringprep_ucs4_to_utf8 (ucs4, ucs4len, 0, 0);
  free (ucs4);
  if (!utf8)
    return STRINGPREP_MALLOC_ERROR;

  if (strlen (utf8) >= maxlen)
    {
      free (utf8);
      return STRINGPREP_TOO_SMALL_BUFFER;
    }

  strcpy (in, utf8);		/* flawfinder: ignore */

  free (utf8);

  return STRINGPREP_OK;
}
Exemplo n.º 2
0
static int
stringprep_4zi_1 (uint32_t * ucs4, size_t ucs4len, size_t maxucs4len,
		  Stringprep_profile_flags flags,
		  const Stringprep_profile * profile)
{
  int rc;

  rc = stringprep_4i (ucs4, &ucs4len, maxucs4len, flags, profile);
  if (rc != STRINGPREP_OK)
    return rc;

  if (ucs4len >= maxucs4len)
    return STRINGPREP_TOO_SMALL_BUFFER;

  ucs4[ucs4len] = 0;

  return STRINGPREP_OK;
}