1 #ifndef _CTYPE_H
2 #define _CTYPE_H
3
4 #define _U 0x01 /* upper */
5 #define _L 0x02 /* lower */
6 #define _D 0x04 /* digit */
7 #define _C 0x08 /* cntrl */
8 #define _P 0x10 /* punct */
9 #define _S 0x20 /* white space (space/lf/tab) */
10 #define _X 0x40 /* hex digit */
11 #define _SP 0x80 /* hard space (0x20) */
12
13 extern unsigned char _ctype[];
14 extern char _ctmp;
15
16 #define isalnum(c) ((_ctype+1)[c]&(_U|_L|_D))
17 #define isalpha(c) ((_ctype+1)[c]&(_U|_L))
18 #define iscntrl(c) ((_ctype+1)[c]&(_C))
19 #define isdigit(c) ((_ctype+1)[c]&(_D))
20 #define isgraph(c) ((_ctype+1)[c]&(_P|_U|_L|_D))
21 #define islower(c) ((_ctype+1)[c]&(_L))
22 #define isprint(c) ((_ctype+1)[c]&(_P|_U|_L|_D|_SP))
23 #define ispunct(c) ((_ctype+1)[c]&(_P))
24 #define isspace(c) ((_ctype+1)[c]&(_S))
25 #define isupper(c) ((_ctype+1)[c]&(_U))
26 #define isxdigit(c) ((_ctype+1)[c]&(_D|_X))
27
28 #define isascii(c) (((unsigned) c)<=0x7f)
29 #define toascii(c) (((unsigned) c)&0x7f)
30
31 #define tolower(c) (_ctmp=c,isupper(_ctmp)?_ctmp-('A'-'a'):_ctmp)
32 #define toupper(c) (_ctmp=c,islower(_ctmp)?_ctmp-('a'-'A'):_ctmp)
33
34 #endif
35
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