/** \brief tests whether conversion is handled by YAZ' iconv or system iconv */
YAZ_EXPORT int yaz_iconv_isbuiltin(yaz_iconv_t cd);
-YAZ_EXPORT unsigned long yaz_read_UTF8_char(unsigned char *inp,
+YAZ_EXPORT unsigned long yaz_read_UTF8_char(const unsigned char *inp,
size_t inbytesleft,
size_t *no_read,
int *error);