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
|
/* string-util.c - Extra or enhanced routines for null terminated strings.
*
* Copyright (c) 2012 Jani Nikula
*
* 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/ .
*
* Author: Jani Nikula <jani@nikula.org>
*/
#include "string-util.h"
#include "talloc.h"
#include <errno.h>
char *
strtok_len (char *s, const char *delim, size_t *len)
{
/* skip initial delims */
s += strspn (s, delim);
/* length of token */
*len = strcspn (s, delim);
return *len ? s : NULL;
}
static int
is_unquoted_terminator (unsigned char c)
{
return c == 0 || c <= ' ' || c == ')';
}
int
make_boolean_term (void *ctx, const char *prefix, const char *term,
char **buf, size_t *len)
{
const char *in;
char *out;
size_t needed = 3;
int need_quoting = 0;
/* Do we need quoting? To be paranoid, we quote anything
* containing a quote, even though it only matters at the
* beginning, and anything containing non-ASCII text. */
for (in = term; *in && !need_quoting; in++)
if (is_unquoted_terminator (*in) || *in == '"'
|| (unsigned char)*in > 127)
need_quoting = 1;
if (need_quoting)
for (in = term; *in; in++)
needed += (*in == '"') ? 2 : 1;
else
needed = strlen (term) + 1;
/* Reserve space for the prefix */
if (prefix)
needed += strlen (prefix) + 1;
if ((*buf == NULL) || (needed > *len)) {
*len = 2 * needed;
*buf = talloc_realloc (ctx, *buf, char, *len);
}
if (! *buf) {
errno = ENOMEM;
return -1;
}
out = *buf;
/* Copy in the prefix */
if (prefix) {
strcpy (out, prefix);
out += strlen (prefix);
*out++ = ':';
}
if (! need_quoting) {
strcpy (out, term);
return 0;
}
/* Quote term by enclosing it in double quotes and doubling any
* internal double quotes. */
*out++ = '"';
in = term;
while (*in) {
if (*in == '"')
*out++ = '"';
*out++ = *in++;
}
*out++ = '"';
*out = '\0';
return 0;
}
|
