4.3BSD - /usr/src/include/ctype.h

   1: /*	ctype.h	4.2	85/09/04	*/
   2: 
   3: #define _U  01
   4: #define _L  02
   5: #define _N  04
   6: #define _S  010
   7: #define _P  020
   8: #define _C  040
   9: #define _X  0100
  10: #define _B  0200
  11: 
  12: extern  char    _ctype_[];
  13: 
  14: #define isalpha(c)  ((_ctype_+1)[c]&(_U|_L))
  15: #define isupper(c)  ((_ctype_+1)[c]&_U)
  16: #define islower(c)  ((_ctype_+1)[c]&_L)
  17: #define isdigit(c)  ((_ctype_+1)[c]&_N)
  18: #define isxdigit(c) ((_ctype_+1)[c]&(_N|_X))
  19: #define isspace(c)  ((_ctype_+1)[c]&_S)
  20: #define ispunct(c)  ((_ctype_+1)[c]&_P)
  21: #define isalnum(c)  ((_ctype_+1)[c]&(_U|_L|_N))
  22: #define isprint(c)  ((_ctype_+1)[c]&(_P|_U|_L|_N|_B))
  23: #define isgraph(c)  ((_ctype_+1)[c]&(_P|_U|_L|_N))
  24: #define iscntrl(c)  ((_ctype_+1)[c]&_C)
  25: #define isascii(c)  ((unsigned)(c)<=0177)
  26: #define toupper(c)  ((c)-'a'+'A')
  27: #define tolower(c)  ((c)-'A'+'a')
  28: #define toascii(c)  ((c)&0177)

Defined macros