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
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/* Copyright (C) 2017 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "contrib/string.h"
#include "contrib/ctype.h"
uint8_t *memdup(const uint8_t *data, size_t data_size)
{
uint8_t *result = (uint8_t *)malloc(data_size);
if (!result) {
return NULL;
}
return memcpy(result, data, data_size);
}
char *sprintf_alloc(const char *fmt, ...)
{
char *strp = NULL;
va_list ap;
va_start(ap, fmt);
int ret = vasprintf(&strp, fmt, ap);
va_end(ap);
if (ret < 0) {
return NULL;
}
return strp;
}
char *strcdup(const char *s1, const char *s2)
{
if (!s1 || !s2) {
return NULL;
}
size_t s1len = strlen(s1);
size_t s2len = strlen(s2);
size_t nlen = s1len + s2len + 1;
char* dst = malloc(nlen);
if (dst == NULL) {
return NULL;
}
memcpy(dst, s1, s1len);
memcpy(dst + s1len, s2, s2len + 1);
return dst;
}
char *strstrip(const char *str)
{
// leading white-spaces
const char *scan = str;
while (is_space(scan[0])) {
scan += 1;
}
// trailing white-spaces
size_t len = strlen(scan);
while (len > 0 && is_space(scan[len - 1])) {
len -= 1;
}
char *trimmed = malloc(len + 1);
if (!trimmed) {
return NULL;
}
memcpy(trimmed, scan, len);
trimmed[len] = '\0';
return trimmed;
}
int const_time_memcmp(const void *s1, const void *s2, size_t n)
{
volatile uint8_t equal = 0;
for (size_t i = 0; i < n; i++) {
equal |= ((uint8_t *)s1)[i] ^ ((uint8_t *)s2)[i];
}
return equal;
}
typedef void *(*memset_t)(void *, int, size_t);
static volatile memset_t volatile_memset = memset;
void *memzero(void *s, size_t n)
{
return volatile_memset(s, 0, n);
}
|
