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ctype.h
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C/C++ Source or Header
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1993-03-14
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992b
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27 lines
#define _U 01 /* Upper case */
#define _L 02 /* Lower case */
#define _N 04 /* Numeral (digit) */
#define _S 010 /* Spacing character */
#define _P 020 /* Punctuation */
#define _C 040 /* Control character */
#define _B 0100 /* Blank */
#define _X 0200 /* heXadecimal digit */
extern char _ctype[];
#define isalpha(c) ((_ctype + 1)[c] & (_U | _L))
#define isupper(c) ((_ctype + 1)[c] & _U)
#define islower(c) ((_ctype + 1)[c] & _L)
#define isdigit(c) ((_ctype + 1)[c] & _N)
#define isxdigit(c) ((_ctype + 1)[c] & _X)
#define isalnum(c) ((_ctype + 1)[c] & (_U | _L | _N))
#define isspace(c) ((_ctype + 1)[c] & _S)
#define ispunct(c) ((_ctype + 1)[c] & _P)
#define isprint(c) ((_ctype + 1)[c] & (_P | _U | _L | _N | _B))
#define isgraph(c) ((_ctype + 1)[c] & (_P | _U | _L | _N))
#define iscntrl(c) ((_ctype + 1)[c] & _C)
#define isascii(c) (!((c) & ~0177))
#define _toupper(c) ((c) - 'a' + 'A')
#define _tolower(c) ((c) - 'A' + 'a')
#define toascii(c) ((c) & 0177)