1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
/* MIT License
*
* Copyright (c) 1998 Massachusetts Institute of Technology
* Copyright (c) The c-ares project and its contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* SPDX-License-Identifier: MIT
*/
#ifndef __ARES_STR_H
#define __ARES_STR_H
char *ares_strdup(const char *s1);
size_t ares_strlen(const char *str);
/*! Copy string from source to destination with destination buffer size
* provided. The destination is guaranteed to be null terminated, if the
* provided buffer isn't large enough, only those bytes from the source that
* will fit will be copied.
*
* \param[out] dest Destination buffer
* \param[in] src Source to copy
* \param[in] dest_size Size of destination buffer
* \return String length. Will be at most dest_size-1
*/
size_t ares_strcpy(char *dest, const char *src, size_t dest_size);
ares_bool_t ares_str_isnum(const char *str);
void ares__str_ltrim(char *str);
void ares__str_rtrim(char *str);
void ares__str_trim(char *str);
unsigned char ares__tolower(unsigned char c);
ares_bool_t ares__memeq_ci(const unsigned char *ptr, const unsigned char *val,
size_t len);
ares_bool_t ares__isspace(int ch);
ares_bool_t ares__isprint(int ch);
ares_bool_t ares__is_hostnamech(int ch);
ares_bool_t ares__is_hostname(const char *str);
/*! Validate the string provided is printable. The length specified must be
* at least the size of the buffer provided. If a NULL-terminator is hit
* before the length provided is hit, this will not be considered a valid
* printable string. This does not validate that the string is actually
* NULL terminated.
*
* \param[in] str Buffer containing string to evaluate.
* \param[in] len Number of characters to evaluate within provided buffer.
* If 0, will return TRUE since it did not hit an exception.
* \return ARES_TRUE if the entire string is printable, ARES_FALSE if not.
*/
ares_bool_t ares__str_isprint(const char *str, size_t len);
/* We only care about ASCII rules */
#define ares__isascii(x) (((unsigned char)x) <= 127)
#define ares__isdigit(x) \
(((unsigned char)x) >= '0' && ((unsigned char)x) <= '9')
#define ares__isxdigit(x) \
(ares__isdigit(x) || \
(((unsigned char)x) >= 'a' && ((unsigned char)x) <= 'f') || \
(((unsigned char)x) >= 'A' && ((unsigned char)x) <= 'F'))
#define ares__isupper(x) \
(((unsigned char)x) >= 'A' && ((unsigned char)x) <= 'Z')
#define ares__islower(x) \
(((unsigned char)x) >= 'a' && ((unsigned char)x) <= 'z')
#define ares__isalpha(x) (ares__islower(x) || ares__isupper(x))
#endif /* __ARES_STR_H */
|
