Line data Source code
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 1 : extern 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 :
38 : static inline unsigned char __tolower(unsigned char c)
39 : {
40 : if (isupper(c))
41 : c -= 'A'-'a';
42 : return c;
43 : }
44 :
45 : static 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 : #endif
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