xref: /openbmc/linux/tools/include/nolibc/ctype.h (revision 55abdd1f) 
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 #ifndef _NOLIBC_CTYPE_H
8 #define _NOLIBC_CTYPE_H
9 
10 #include "std.h"
11 
12 /*
13  * As much as possible, please keep functions alphabetically sorted.
14  */
15 
16 static __attribute__((unused))
isascii(int c)17 int isascii(int c)
18 {
19 	/* 0x00..0x7f */
20 	return (unsigned int)c <= 0x7f;
21 }
22 
23 static __attribute__((unused))
isblank(int c)24 int isblank(int c)
25 {
26 	return c == '\t' || c == ' ';
27 }
28 
29 static __attribute__((unused))
iscntrl(int c)30 int iscntrl(int c)
31 {
32 	/* 0x00..0x1f, 0x7f */
33 	return (unsigned int)c < 0x20 || c == 0x7f;
34 }
35 
36 static __attribute__((unused))
isdigit(int c)37 int isdigit(int c)
38 {
39 	return (unsigned int)(c - '0') < 10;
40 }
41 
42 static __attribute__((unused))
isgraph(int c)43 int isgraph(int c)
44 {
45 	/* 0x21..0x7e */
46 	return (unsigned int)(c - 0x21) < 0x5e;
47 }
48 
49 static __attribute__((unused))
islower(int c)50 int islower(int c)
51 {
52 	return (unsigned int)(c - 'a') < 26;
53 }
54 
55 static __attribute__((unused))
isprint(int c)56 int isprint(int c)
57 {
58 	/* 0x20..0x7e */
59 	return (unsigned int)(c - 0x20) < 0x5f;
60 }
61 
62 static __attribute__((unused))
isspace(int c)63 int isspace(int c)
64 {
65 	/* \t is 0x9, \n is 0xA, \v is 0xB, \f is 0xC, \r is 0xD */
66 	return ((unsigned int)c == ' ') || (unsigned int)(c - 0x09) < 5;
67 }
68 
69 static __attribute__((unused))
isupper(int c)70 int isupper(int c)
71 {
72 	return (unsigned int)(c - 'A') < 26;
73 }
74 
75 static __attribute__((unused))
isxdigit(int c)76 int isxdigit(int c)
77 {
78 	return isdigit(c) || (unsigned int)(c - 'A') < 6 || (unsigned int)(c - 'a') < 6;
79 }
80 
81 static __attribute__((unused))
isalpha(int c)82 int isalpha(int c)
83 {
84 	return islower(c) || isupper(c);
85 }
86 
87 static __attribute__((unused))
isalnum(int c)88 int isalnum(int c)
89 {
90 	return isalpha(c) || isdigit(c);
91 }
92 
93 static __attribute__((unused))
ispunct(int c)94 int ispunct(int c)
95 {
96 	return isgraph(c) && !isalnum(c);
97 }
98 
99 /* make sure to include all global symbols */
100 #include "nolibc.h"
101 
102 #endif /* _NOLIBC_CTYPE_H */
103