/**
* 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;
}
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;
}