1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _LINUX_CTYPE_H |
3 | #define _LINUX_CTYPE_H |
4 | |
5 | #include <linux/compiler.h> |
6 | |
7 | /* |
8 | * NOTE! This ctype does not handle EOF like the standard C |
9 | * library is required to. |
10 | */ |
11 | |
12 | #define _U 0x01 /* upper */ |
13 | #define _L 0x02 /* lower */ |
14 | #define _D 0x04 /* digit */ |
15 | #define _C 0x08 /* cntrl */ |
16 | #define _P 0x10 /* punct */ |
17 | #define _S 0x20 /* white space (space/lf/tab) */ |
18 | #define _X 0x40 /* hex digit */ |
19 | #define _SP 0x80 /* hard space (0x20) */ |
20 | |
21 | extern const unsigned char _ctype[]; |
22 | |
23 | #define __ismask(x) (_ctype[(int)(unsigned char)(x)]) |
24 | |
25 | #define isalnum(c) ((__ismask(c)&(_U|_L|_D)) != 0) |
26 | #define isalpha(c) ((__ismask(c)&(_U|_L)) != 0) |
27 | #define iscntrl(c) ((__ismask(c)&(_C)) != 0) |
28 | #define isgraph(c) ((__ismask(c)&(_P|_U|_L|_D)) != 0) |
29 | #define islower(c) ((__ismask(c)&(_L)) != 0) |
30 | #define isprint(c) ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0) |
31 | #define ispunct(c) ((__ismask(c)&(_P)) != 0) |
32 | /* Note: isspace() must return false for %NUL-terminator */ |
33 | #define isspace(c) ((__ismask(c)&(_S)) != 0) |
34 | #define isupper(c) ((__ismask(c)&(_U)) != 0) |
35 | #define isxdigit(c) ((__ismask(c)&(_D|_X)) != 0) |
36 | |
37 | #define isascii(c) (((unsigned char)(c))<=0x7f) |
38 | #define toascii(c) (((unsigned char)(c))&0x7f) |
39 | |
40 | #if __has_builtin(__builtin_isdigit) |
41 | #define isdigit(c) __builtin_isdigit(c) |
42 | #else |
43 | static inline int isdigit(int c) |
44 | { |
45 | return '0' <= c && c <= '9'; |
46 | } |
47 | #endif |
48 | |
49 | static inline unsigned char __tolower(unsigned char c) |
50 | { |
51 | if (isupper(c)) |
52 | c -= 'A'-'a'; |
53 | return c; |
54 | } |
55 | |
56 | static inline unsigned char __toupper(unsigned char c) |
57 | { |
58 | if (islower(c)) |
59 | c -= 'a'-'A'; |
60 | return c; |
61 | } |
62 | |
63 | #define tolower(c) __tolower(c) |
64 | #define toupper(c) __toupper(c) |
65 | |
66 | /* |
67 | * Fast implementation of tolower() for internal usage. Do not use in your |
68 | * code. |
69 | */ |
70 | static inline char _tolower(const char c) |
71 | { |
72 | return c | 0x20; |
73 | } |
74 | |
75 | /* Fast check for octal digit */ |
76 | static inline int isodigit(const char c) |
77 | { |
78 | return c >= '0' && c <= '7'; |
79 | } |
80 | |
81 | #endif |
82 | |