1 #ifndef _LINUX_CTYPE_H
2 #define _LINUX_CTYPE_H
3
4 /*
5 * NOTE! This ctype does not handle EOF like the standard C
6 * library is required to.
7 */
8
9 #define _U 0x01 /* upper */
10 #define _L 0x02 /* lower */
11 #define _D 0x04 /* digit */
12 #define _C 0x08 /* cntrl */
13 #define _P 0x10 /* punct */
14 #define _S 0x20 /* white space (space/lf/tab) */
15 #define _X 0x40 /* hex digit */
16 #define _SP 0x80 /* hard space (0x20) */
17
18 extern unsigned char _ctype[];
19
20 #define __ismask(x) (_ctype[(int)(unsigned char)(x)])
21
22 #define isalnum(c) ((__ismask(c)&(_U|_L|_D)) != 0)
23 #define isalpha(c) ((__ismask(c)&(_U|_L)) != 0)
24 #define iscntrl(c) ((__ismask(c)&(_C)) != 0)
25 #define isdigit(c) ((__ismask(c)&(_D)) != 0)
26 #define isgraph(c) ((__ismask(c)&(_P|_U|_L|_D)) != 0)
27 #define islower(c) ((__ismask(c)&(_L)) != 0)
28 #define isprint(c) ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)
29 #define ispunct(c) ((__ismask(c)&(_P)) != 0)
30 #define isspace(c) ((__ismask(c)&(_S)) != 0)
31 #define isupper(c) ((__ismask(c)&(_U)) != 0)
32 #define isxdigit(c) ((__ismask(c)&(_D|_X)) != 0)
33
34 #define isascii(c) (((unsigned char)(c))<=0x7f)
35 #define toascii(c) (((unsigned char)(c))&0x7f)
36
37 static inline unsigned char __tolower(unsigned char c)
38 {
39 if (isupper(c))
40 c -= 'A'-'a';
41 return c;
42 }
43
44 static inline unsigned char __toupper(unsigned char c)
45 {
46 if (islower(c))
47 c -= 'a'-'A';
48 return c;
49 }
50
51 #define tolower(c) __tolower(c)
52 #define toupper(c) __toupper(c)
53
54 #endif
55
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