ossl_ctype_check
int ossl_ctype_check(int c, unsigned int mask);
#define ossl_isalnum(c) (ossl_ctype_check((c), CTYPE_MASK_alnum))
#define ossl_isalpha(c) (ossl_ctype_check((c), CTYPE_MASK_alpha))
#define ossl_isascii(c) (ossl_ctype_check((c), CTYPE_MASK_ascii))
#define ossl_isblank(c) (ossl_ctype_check((c), CTYPE_MASK_blank))
#define ossl_iscntrl(c) (ossl_ctype_check((c), CTYPE_MASK_cntrl))
#define ossl_isgraph(c) (ossl_ctype_check((c), CTYPE_MASK_graph))
#define ossl_isprint(c) (ossl_ctype_check((c), CTYPE_MASK_print))
#define ossl_ispunct(c) (ossl_ctype_check((c), CTYPE_MASK_punct))
#define ossl_isspace(c) (ossl_ctype_check((c), CTYPE_MASK_space))
#define ossl_isxdigit(c) (ossl_ctype_check((c), CTYPE_MASK_xdigit))
#define ossl_isbase64(c) (ossl_ctype_check((c), CTYPE_MASK_base64))
#define ossl_isasn1print(c) (ossl_ctype_check((c), CTYPE_MASK_asn1print))