Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_CTYPE_H
3#define _LINUX_CTYPE_H
4
5/*
6 * NOTE! This ctype does not handle EOF like the standard C
7 * library is required to.
8 */
9
10#define _U 0x01 /* upper */
11#define _L 0x02 /* lower */
12#define _D 0x04 /* digit */
13#define _C 0x08 /* cntrl */
14#define _P 0x10 /* punct */
15#define _S 0x20 /* white space (space/lf/tab) */
16#define _X 0x40 /* hex digit */
17#define _SP 0x80 /* hard space (0x20) */
18
19extern const unsigned char _ctype[];
20
21#define __ismask(x) (_ctype[(int)(unsigned char)(x)])
22
23#define isalnum(c) ((__ismask(c)&(_U|_L|_D)) != 0)
24#define isalpha(c) ((__ismask(c)&(_U|_L)) != 0)
25#define iscntrl(c) ((__ismask(c)&(_C)) != 0)
26static inline int __isdigit(int c)
27{
28 return '0' <= c && c <= '9';
29}
30#define isdigit(c) __isdigit(c)
31#define isgraph(c) ((__ismask(c)&(_P|_U|_L|_D)) != 0)
32#define islower(c) ((__ismask(c)&(_L)) != 0)
33#define isprint(c) ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)
34#define ispunct(c) ((__ismask(c)&(_P)) != 0)
35/* Note: isspace() must return false for %NUL-terminator */
36#define isspace(c) ((__ismask(c)&(_S)) != 0)
37#define isupper(c) ((__ismask(c)&(_U)) != 0)
38#define isxdigit(c) ((__ismask(c)&(_D|_X)) != 0)
39
40#define isascii(c) (((unsigned char)(c))<=0x7f)
41#define toascii(c) (((unsigned char)(c))&0x7f)
42
43static inline unsigned char __tolower(unsigned char c)
44{
45 if (isupper(c))
46 c -= 'A'-'a';
47 return c;
48}
49
50static inline unsigned char __toupper(unsigned char c)
51{
52 if (islower(c))
53 c -= 'a'-'A';
54 return c;
55}
56
57#define tolower(c) __tolower(c)
58#define toupper(c) __toupper(c)
59
60/*
61 * Fast implementation of tolower() for internal usage. Do not use in your
62 * code.
63 */
64static inline char _tolower(const char c)
65{
66 return c | 0x20;
67}
68
69/* Fast check for octal digit */
70static inline int isodigit(const char c)
71{
72 return c >= '0' && c <= '7';
73}
74
75#endif