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
16static __attribute__((unused))
17int isascii(int c)
18{
19	/* 0x00..0x7f */
20	return (unsigned int)c <= 0x7f;
21}
22
23static __attribute__((unused))
24int isblank(int c)
25{
26	return c == '\t' || c == ' ';
27}
28
29static __attribute__((unused))
30int iscntrl(int c)
31{
32	/* 0x00..0x1f, 0x7f */
33	return (unsigned int)c < 0x20 || c == 0x7f;
34}
35
36static __attribute__((unused))
37int isdigit(int c)
38{
39	return (unsigned int)(c - '0') < 10;
40}
41
42static __attribute__((unused))
43int isgraph(int c)
44{
45	/* 0x21..0x7e */
46	return (unsigned int)(c - 0x21) < 0x5e;
47}
48
49static __attribute__((unused))
50int islower(int c)
51{
52	return (unsigned int)(c - 'a') < 26;
53}
54
55static __attribute__((unused))
56int isprint(int c)
57{
58	/* 0x20..0x7e */
59	return (unsigned int)(c - 0x20) < 0x5f;
60}
61
62static __attribute__((unused))
63int 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
69static __attribute__((unused))
70int isupper(int c)
71{
72	return (unsigned int)(c - 'A') < 26;
73}
74
75static __attribute__((unused))
76int isxdigit(int c)
77{
78	return isdigit(c) || (unsigned int)(c - 'A') < 6 || (unsigned int)(c - 'a') < 6;
79}
80
81static __attribute__((unused))
82int isalpha(int c)
83{
84	return islower(c) || isupper(c);
85}
86
87static __attribute__((unused))
88int isalnum(int c)
89{
90	return isalpha(c) || isdigit(c);
91}
92
93static __attribute__((unused))
94int 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