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- #define _U 01
- #define _L 02
- #define _N 04
- #define _S 010
- #define _P 020
- #define _C 040
- #define _X 0100
- #define _O 0200
- extern unsigned char _cbtype_[]; /* in /usr/src/libc/gen/ctype_.c */
- #define isop(c) ((_cbtype_+1)[c]&_O)
- #define isalpha(c) ((_cbtype_+1)[c]&(_U|_L))
- #define isupper(c) ((_cbtype_+1)[c]&_U)
- #define islower(c) ((_cbtype_+1)[c]&_L)
- #define isdigit(c) ((_cbtype_+1)[c]&_N)
- #define isxdigit(c) ((_cbtype_+1)[c]&(_N|_X))
- #define isspace(c) ((_cbtype_+1)[c]&_S)
- #define ispunct(c) ((_cbtype_+1)[c]&_P)
- #define isalnum(c) ((_cbtype_+1)[c]&(_U|_L|_N))
- #define isprint(c) ((_cbtype_+1)[c]&(_P|_U|_L|_N))
- #define iscntrl(c) ((_cbtype_+1)[c]&_C)
- #define isascii(c) ((unsigned)(c)<=0177)
- #define toupper(c) ((c)-'a'+'A')
- #define tolower(c) ((c)-'A'+'a')
- #define toascii(c) ((c)&0177)
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