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
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <assert.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include "util.h"
#include "strv.h"
void strv_free(char **l) {
char **k;
if (!l)
return;
for (k = l; *k; k++)
free(*k);
free(l);
}
char **strv_copy(char * const *l) {
char **r, **k;
k = r = new(char*, strv_length(l) + 1);
if (!r)
return NULL;
if (l)
for (; *l; k++, l++) {
*k = strdup(*l);
if (!*k) {
strv_free(r);
return NULL;
}
}
*k = NULL;
return r;
}
unsigned strv_length(char * const *l) {
unsigned n = 0;
if (!l)
return 0;
for (; *l; l++)
n++;
return n;
}
char **strv_new_ap(const char *x, va_list ap) {
const char *s;
char **a;
unsigned n = 0, i = 0;
va_list aq;
/* As a special trick we ignore all listed strings that equal
* (const char*) -1. This is supposed to be used with the
* STRV_IFNOTNULL() macro to include possibly NULL strings in
* the string list. */
if (x) {
n = x == (const char*) -1 ? 0 : 1;
va_copy(aq, ap);
while ((s = va_arg(aq, const char*))) {
if (s == (const char*) -1)
continue;
n++;
}
va_end(aq);
}
a = new(char*, n+1);
if (!a)
return NULL;
if (x) {
if (x != (const char*) -1) {
a[i] = strdup(x);
if (!a[i])
goto fail;
i++;
}
while ((s = va_arg(ap, const char*))) {
if (s == (const char*) -1)
continue;
a[i] = strdup(s);
if (!a[i])
goto fail;
i++;
}
}
a[i] = NULL;
return a;
fail:
strv_free(a);
return NULL;
}
char **strv_new(const char *x, ...) {
char **r;
va_list ap;
va_start(ap, x);
r = strv_new_ap(x, ap);
va_end(ap);
return r;
}
int strv_push(char ***l, char *value) {
char **c;
unsigned n;
if (!value)
return 0;
n = strv_length(*l);
c = realloc(*l, sizeof(char*) * (n + 2));
if (!c)
return -ENOMEM;
c[n] = value;
c[n+1] = NULL;
*l = c;
return 0;
}
int strv_consume(char ***l, char *value) {
int r;
r = strv_push(l, value);
if (r < 0)
free(value);
return r;
}
int strv_extend(char ***l, const char *value) {
char *v;
if (!value)
return 0;
v = strdup(value);
if (!v)
return -ENOMEM;
return strv_consume(l, v);
}
char **strv_uniq(char **l) {
char **i;
/* Drops duplicate entries. The first identical string will be
* kept, the others dropped */
STRV_FOREACH(i, l)
strv_remove(i+1, *i);
return l;
}
char **strv_remove(char **l, const char *s) {
char **f, **t;
if (!l)
return NULL;
assert(s);
/* Drops every occurrence of s in the string list, edits
* in-place. */
for (f = t = l; *f; f++)
if (streq(*f, s))
free(*f);
else
*(t++) = *f;
*t = NULL;
return l;
}
|
