Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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)
25static inline int isdigit(int c)
26{
27 return '0' <= c && c <= '9';
28}
29#define isgraph(c) ((__ismask(c)&(_P|_U|_L|_D)) != 0)
30#define islower(c) ((__ismask(c)&(_L)) != 0)
31#define isprint(c) ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)
32#define ispunct(c) ((__ismask(c)&(_P)) != 0)
33/* Note: isspace() must return false for %NUL-terminator */
34#define isspace(c) ((__ismask(c)&(_S)) != 0)
35#define isupper(c) ((__ismask(c)&(_U)) != 0)
36#define isxdigit(c) ((__ismask(c)&(_D|_X)) != 0)
37
38#define isascii(c) (((unsigned char)(c))<=0x7f)
39#define toascii(c) (((unsigned char)(c))&0x7f)
40
41static inline unsigned char __tolower(unsigned char c)
42{
43 if (isupper(c))
44 c -= 'A'-'a';
45 return c;
46}
47
48static inline unsigned char __toupper(unsigned char c)
49{
50 if (islower(c))
51 c -= 'a'-'A';
52 return c;
53}
54
55#define tolower(c) __tolower(c)
56#define toupper(c) __toupper(c)
57
58/*
59 * Fast implementation of tolower() for internal usage. Do not use in your
60 * code.
61 */
62static inline char _tolower(const char c)
63{
64 return c | 0x20;
65}
66
67/* Fast check for octal digit */
68static inline int isodigit(const char c)
69{
70 return c >= '0' && c <= '7';
71}
72
73#endif