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 | |
19 | extern 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) |
26 | static inline int isdigit(int c) |
27 | { |
28 | return '0' <= c && c <= '9'; |
29 | } |
30 | #define isgraph(c) ((__ismask(c)&(_P|_U|_L|_D)) != 0) |
31 | #define islower(c) ((__ismask(c)&(_L)) != 0) |
32 | #define isprint(c) ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0) |
33 | #define ispunct(c) ((__ismask(c)&(_P)) != 0) |
34 | /* Note: isspace() must return false for %NUL-terminator */ |
35 | #define isspace(c) ((__ismask(c)&(_S)) != 0) |
36 | #define isupper(c) ((__ismask(c)&(_U)) != 0) |
37 | #define isxdigit(c) ((__ismask(c)&(_D|_X)) != 0) |
38 | |
39 | #define isascii(c) (((unsigned char)(c))<=0x7f) |
40 | #define toascii(c) (((unsigned char)(c))&0x7f) |
41 | |
42 | static inline unsigned char __tolower(unsigned char c) |
43 | { |
44 | if (isupper(c)) |
45 | c -= 'A'-'a'; |
46 | return c; |
47 | } |
48 | |
49 | static inline unsigned char __toupper(unsigned char c) |
50 | { |
51 | if (islower(c)) |
52 | c -= 'a'-'A'; |
53 | return c; |
54 | } |
55 | |
56 | #define tolower(c) __tolower(c) |
57 | #define toupper(c) __toupper(c) |
58 | |
59 | /* |
60 | * Fast implementation of tolower() for internal usage. Do not use in your |
61 | * code. |
62 | */ |
63 | static inline char _tolower(const char c) |
64 | { |
65 | return c | 0x20; |
66 | } |
67 | |
68 | /* Fast check for octal digit */ |
69 | static inline int isodigit(const char c) |
70 | { |
71 | return c >= '0' && c <= '7'; |
72 | } |
73 | |
74 | #endif |
75 | |