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-
- /* ctype.h standard header
- * copyright (c) 1990 by P.J. Plauger
- */
- #ifndef _CTYPE
- #define _CTYPE
-
- /* _Ctype code bits */
-
- #define _XA 0x200 /* extra alphabetic */
- #define _XS 0x100 /* extra space */
- #define _BB 0x80 /* BEL, BS, etc. */
- #define _CN 0x40 /* CR, FF, HT, NL, VT */
- #define _DI 0x20 /* '0'-'9' */
- #define _LO 0x10 /* 'a'-'z' */
- #define _PU 0x08 /* punctuation */
- #define _SP 0x04 /* space */
- #define _UP 0x02 /* 'A'-'Z' */
- #define _XD 0x01 /* '0'-'9', 'A'-'F', 'a'-'f' */
-
- int isalnum(int), isalpha(int), iscntrl(int);
- int isdigit(int), isgraph(int), islower(int);
- int isprint(int), ispunct(int), isspace(int);
- int isupper(int), isxdigit(int);
- int tolower(int), toupper(int);
-
- extern const short *_Ctype, *_Tolower, *_Toupper;
-
- #define isalnum(c) \
- (_Ctype[(int)(c)] & (_DI|_LO|_UP|_XA))
- #define isalpha(c) \
- (_Ctype[(int)(c)] & (_LO|_UP|_XA))
- #define iscntrl(c) (_Ctype[(int)(c)] & (_BB|_CN))
- #define isdigit(c) (_Ctype[(int)(c)] & _DI)
- #define isgraph(c) \
- (_Ctype[(int)(c)] & (_DI|_LO|_PU|_UP|_XA))
- #define islower(c) (_Ctype[(int)(c)] & _LO)
- #define isprint(c) \
- (_Ctype[(int)(c)] & (_DI|_LO|_PU|_SP|_UP|_XA))
- #define ispunct(c) (_Ctype[(int)(c)] & _PU)
- #define isspace(c) \
- (_Ctype[(int)(c)] & (_CN|_SP|_XS))
- #define isupper(c) (_Ctype[(int)(c)] & _UP)
- #define isxdigit(c) (_Ctype[(int)(c)] & _XD)
- #define tolower(c) (_Tolower[(int)(c)]
- #define toupper(c) (_Toupper[(int)(c)]
-
- #endif
-
-