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
18extern const 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/* Note: isspace() must return false for %NUL-terminator */
31#define isspace(c)	((__ismask(c)&(_S)) != 0)
32#define isupper(c)	((__ismask(c)&(_U)) != 0)
33#define isxdigit(c)	((__ismask(c)&(_D|_X)) != 0)
34
35#define isascii(c) (((unsigned char)(c))<=0x7f)
36#define toascii(c) (((unsigned char)(c))&0x7f)
37
38static inline unsigned char __tolower(unsigned char c)
39{
40	if (isupper(c))
41		c -= 'A'-'a';
42	return c;
43}
44
45static inline unsigned char __toupper(unsigned char c)
46{
47	if (islower(c))
48		c -= 'a'-'A';
49	return c;
50}
51
52#define tolower(c) __tolower(c)
53#define toupper(c) __toupper(c)
54
55/*
56 * Fast implementation of tolower() for internal usage. Do not use in your
57 * code.
58 */
59static inline char _tolower(const char c)
60{
61	return c | 0x20;
62}
63
64/* Fast check for octal digit */
65static inline int isodigit(const char c)
66{
67	return c >= '0' && c <= '7';
68}
69
70#endif
71