xref: /linux/tools/include/nolibc/ctype.h (revision 015a99fa76650e7d6efa3e36f20c0f5b346fe9ce) 
1 /* SPDX-License-Identifier: LGPL-2.1 OR MIT */
2 /*
3  * ctype function definitions for NOLIBC
4  * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
5  */
6 
7 /* make sure to include all global symbols */
8 #include "nolibc.h"
9 
10 #ifndef _NOLIBC_CTYPE_H
11 #define _NOLIBC_CTYPE_H
12 
13 #include "std.h"
14 
15 /*
16  * As much as possible, please keep functions alphabetically sorted.
17  */
18 
19 static __attribute__((unused))
isascii(int c)20 int isascii(int c)
21 {
22 	/* 0x00..0x7f */
23 	return (unsigned int)c <= 0x7f;
24 }
25 
26 static __attribute__((unused))
isblank(int c)27 int isblank(int c)
28 {
29 	return c == '\t' || c == ' ';
30 }
31 
32 static __attribute__((unused))
iscntrl(int c)33 int iscntrl(int c)
34 {
35 	/* 0x00..0x1f, 0x7f */
36 	return (unsigned int)c < 0x20 || c == 0x7f;
37 }
38 
39 static __attribute__((unused))
isdigit(int c)40 int isdigit(int c)
41 {
42 	return (unsigned int)(c - '0') < 10;
43 }
44 
45 static __attribute__((unused))
isgraph(int c)46 int isgraph(int c)
47 {
48 	/* 0x21..0x7e */
49 	return (unsigned int)(c - 0x21) < 0x5e;
50 }
51 
52 static __attribute__((unused))
islower(int c)53 int islower(int c)
54 {
55 	return (unsigned int)(c - 'a') < 26;
56 }
57 
58 static __attribute__((unused))
isprint(int c)59 int isprint(int c)
60 {
61 	/* 0x20..0x7e */
62 	return (unsigned int)(c - 0x20) < 0x5f;
63 }
64 
65 static __attribute__((unused))
isspace(int c)66 int isspace(int c)
67 {
68 	/* \t is 0x9, \n is 0xA, \v is 0xB, \f is 0xC, \r is 0xD */
69 	return ((unsigned int)c == ' ') || (unsigned int)(c - 0x09) < 5;
70 }
71 
72 static __attribute__((unused))
isupper(int c)73 int isupper(int c)
74 {
75 	return (unsigned int)(c - 'A') < 26;
76 }
77 
78 static __attribute__((unused))
isxdigit(int c)79 int isxdigit(int c)
80 {
81 	return isdigit(c) || (unsigned int)(c - 'A') < 6 || (unsigned int)(c - 'a') < 6;
82 }
83 
84 static __attribute__((unused))
isalpha(int c)85 int isalpha(int c)
86 {
87 	return islower(c) || isupper(c);
88 }
89 
90 static __attribute__((unused))
isalnum(int c)91 int isalnum(int c)
92 {
93 	return isalpha(c) || isdigit(c);
94 }
95 
96 static __attribute__((unused))
ispunct(int c)97 int ispunct(int c)
98 {
99 	return isgraph(c) && !isalnum(c);
100 }
101 
102 #endif /* _NOLIBC_CTYPE_H */
103