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- /*
- * ctype.h - character handling
- */
- /* $Id$ */
- #ifndef _CTYPE_H
- #define _CTYPE_H
- extern char __ctype[]; /* located in chartab.c */
- #define _U 0x01 /* this bit is for upper-case letters [A-Z] */
- #define _L 0x02 /* this bit is for lower-case letters [a-z] */
- #define _N 0x04 /* this bit is for numbers [0-9] */
- #define _S 0x08 /* this bit is for white space \t \n \f etc */
- #define _P 0x10 /* this bit is for punctuation characters */
- #define _C 0x20 /* this bit is for control characters */
- #define _X 0x40 /* this bit is for hex digits [a-f] and [A-F]*/
- extern int isalnum(int _c); /* alphanumeric [a-z], [A-Z], [0-9] */
- extern int isalpha(int _c); /* alphabetic */
- extern int iscntrl(int _c); /* control characters */
- extern int isdigit(int _c); /* digit [0-9] */
- extern int isgraph(int _c); /* graphic character */
- extern int islower(int _c); /* lower-case letter [a-z] */
- extern int isprint(int _c); /* printable character */
- extern int ispunct(int _c); /* punctuation mark */
- extern int isspace(int _c); /* white space sp, \f, \n, \r, \t, \v */
- extern int isupper(int _c); /* upper-case letter [A-Z] */
- extern int isxdigit(int _c); /* hex digit [0-9], [a-f], [A-F] */
- extern int tolower(int _c); /* convert to lower case character */
- extern int toupper(int _c); /* convert to upper case character */
- #define isalpha(c) ((__ctype+1)[c]&(_U|_L))
- #define isspace(c) ((__ctype+1)[c]&_S)
- #define iscntrl(c) ((__ctype+1)[c]&_C)
- #define isxdigit(c) ((__ctype+1)[c]&(_N|_X))
- #define isalnum(c) ((__ctype+1)[c]&(_U|_L|_N))
- #define isgraph(c) ((__ctype+1)[c]&(_P|_U|_L|_N))
- #define ispunct(c) ((__ctype+1)[c]&_P)
- #define isdigit(c) ((unsigned) ((c)-'0') < 10)
- #define islower(c) ((unsigned) ((c)-'a') < 26)
- #define isupper(c) ((unsigned) ((c)-'A') < 26)
- #define isprint(c) ((unsigned) ((c)-' ') < 95)
- #define isascii(c) ((unsigned) (c) < 128)
- #endif /* _CTYPE_H */
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