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git.ipfire.org Git - thirdparty/systemd.git/blob - src/strv.c
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
31 char *strv_find(char **l
, const char *name
) {
43 char *strv_find_prefix(char **l
, const char *name
) {
49 if (startswith(*i
, name
))
55 void strv_free(char **l
) {
67 char **strv_copy(char **l
) {
70 if (!(r
= new(char*, strv_length(l
)+1)))
73 for (k
= r
; *l
; k
++, l
++)
74 if (!(*k
= strdup(*l
)))
81 for (k
--; k
>= r
; k
--)
89 unsigned strv_length(char **l
) {
101 char **strv_new_ap(const char *x
, va_list ap
) {
104 unsigned n
= 0, i
= 0;
112 while (va_arg(aq
, const char*))
117 if (!(a
= new(char*, n
+1)))
121 if (!(a
[i
] = strdup(x
))) {
128 while ((s
= va_arg(ap
, const char*))) {
129 if (!(a
[i
] = strdup(s
)))
151 char **strv_new(const char *x
, ...) {
156 r
= strv_new_ap(x
, ap
);
162 char **strv_merge(char **a
, char **b
) {
171 if (!(r
= new(char*, strv_length(a
)+strv_length(b
)+1)))
174 for (k
= r
; *a
; k
++, a
++)
175 if (!(*k
= strdup(*a
)))
178 if (!(*k
= strdup(*b
)))
185 for (k
--; k
>= r
; k
--)
193 char **strv_merge_concat(char **a
, char **b
, const char *suffix
) {
196 /* Like strv_merge(), but appends suffix to all strings in b, before adding */
201 if (!(r
= new(char*, strv_length(a
)+strv_length(b
)+1)))
204 for (k
= r
; *a
; k
++, a
++)
205 if (!(*k
= strdup(*a
)))
208 if (!(*k
= strappend(*b
, suffix
)))
215 for (k
--; k
>= r
; k
--)
224 char **strv_split(const char *s
, const char *separator
) {
234 FOREACH_WORD_SEPARATOR(w
, l
, s
, separator
, state
)
237 if (!(r
= new(char*, n
+1)))
241 FOREACH_WORD_SEPARATOR(w
, l
, s
, separator
, state
)
242 if (!(r
[i
++] = strndup(w
, l
))) {
251 char **strv_split_quoted(const char *s
) {
261 FOREACH_WORD_QUOTED(w
, l
, s
, state
)
264 if (!(r
= new(char*, n
+1)))
268 FOREACH_WORD_QUOTED(w
, l
, s
, state
)
269 if (!(r
[i
++] = cunescape_length(w
, l
))) {
278 char *strv_join(char **l
, const char *separator
) {
286 k
= strlen(separator
);
295 if (!(r
= new(char, n
+1)))
301 e
= stpcpy(e
, separator
);
311 char **strv_append(char **l
, const char *s
) {
315 return strv_new(s
, NULL
);
320 if (!(r
= new(char*, strv_length(l
)+2)))
323 for (k
= r
; *l
; k
++, l
++)
324 if (!(*k
= strdup(*l
)))
327 if (!(*(k
++) = strdup(s
)))
334 for (k
--; k
>= r
; k
--)
342 char **strv_uniq(char **l
) {
345 /* Drops duplicate entries. The first identical string will be
346 * kept, the others dropped */
349 strv_remove(i
+1, *i
);
354 char **strv_remove(char **l
, const char *s
) {
360 /* Drops every occurrence of s in the string list */
362 for (f
= t
= l
; *f
; f
++) {
376 static int env_append(char **r
, char ***k
, char **a
) {
383 /* Add the entries of a to *k unless they already exist in *r
384 * in which case they are overridden instead. This assumes
385 * there is enough space in the r array. */
389 size_t n
= strcspn(*a
, "=") + 1;
391 for (j
= r
; j
< *k
; j
++)
392 if (strncmp(*j
, *a
, n
) == 0)
400 if (!(*j
= strdup(*a
)))
407 char **strv_env_merge(unsigned n_lists
, ...) {
413 /* Merges an arbitrary number of environment sets */
415 va_start(ap
, n_lists
);
416 for (i
= 0; i
< n_lists
; i
++) {
417 l
= va_arg(ap
, char**);
422 if (!(r
= new(char*, n
+1)))
427 va_start(ap
, n_lists
);
428 for (i
= 0; i
< n_lists
; i
++) {
429 l
= va_arg(ap
, char**);
430 if (env_append(r
, &k
, l
) < 0)
442 for (k
--; k
>= r
; k
--)
450 static bool env_match(const char *t
, const char *pattern
) {
454 /* pattern a matches string a
459 * a= does not match a
460 * a=b does not match a=
461 * a=b does not match a
462 * a=b does not match a=c */
464 if (streq(t
, pattern
))
467 if (!strchr(pattern
, '=')) {
468 size_t l
= strlen(pattern
);
470 return strncmp(t
, pattern
, l
) == 0 && t
[l
] == '=';
476 char **strv_env_delete(char **x
, unsigned n_lists
, ...) {
478 char **l
, **k
, **r
, **j
;
481 /* Deletes every entry from x that is mentioned in the other
486 if (!(r
= new(char*, n
+1)))
490 va_start(ap
, n_lists
);
492 for (i
= 0; i
< n_lists
; i
++) {
493 l
= va_arg(ap
, char**);
495 if (env_match(*k
, *j
))
501 if (!(r
[i
++] = strdup(*k
))) {
519 char **strv_env_set(char **x
, const char *p
) {
523 if (!(r
= new(char*, strv_length(x
)+2)))
527 if (env_append(r
, &k
, x
) < 0)
530 if (!(*(k
++) = strdup(p
)))
538 for (k
--; k
>= r
; k
--)
547 char *strv_env_get_with_length(char **l
, const char *name
, size_t k
) {
553 if (strncmp(*i
, name
, k
) == 0 &&
560 char *strv_env_get(char **l
, const char *name
) {
561 return strv_env_get_with_length(l
, name
, strlen(name
));
564 char **strv_env_clean(char **l
) {
567 for (r
= ret
= l
; *l
; l
++) {
570 equal
= strchr(*l
, '=');
572 if (equal
&& equal
[1] == 0) {
585 char **strv_parse_nulstr(const char *s
, size_t l
) {
587 unsigned c
= 0, i
= 0;
593 return strv_new(NULL
, NULL
);
595 for (p
= s
; p
< s
+ l
; p
++)
602 if (!(v
= new0(char*, c
+1)))
609 e
= memchr(p
, 0, s
+ l
- p
);
611 if (!(v
[i
++] = strndup(p
, e
? e
- p
: s
+ l
- p
))) {