smb_isdigit
smb_isdigit(pn->pn_fname[3]) &&
if (!smb_isdigit(*str))
#define smb_isalnum(c) (smb_isalpha(c) || smb_isdigit(c))
#define smb_isxdigit(c) (smb_isdigit(c) || \
#define smb_isalnum_ascii(c) (smb_isalpha_ascii(c) || smb_isdigit(c))