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 Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser 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 * const *l) {
70 k = r = new(char*, strv_length(l) + 1);
75 for (; *l; k++, l++) {
87 unsigned strv_length(char * const *l) {
99 char **strv_new_ap(const char *x, va_list ap) {
102 unsigned n = 0, i = 0;
105 /* As a special trick we ignore all listed strings that equal
106 * (const char*) -1. This is supposed to be used with the
107 * STRV_IFNOTNULL() macro to include possibly NULL strings in
108 * the string list. */
111 n = x == (const char*) -1 ? 0 : 1;
114 while ((s = va_arg(aq, const char*))) {
115 if (s == (const char*) -1)
129 if (x != (const char*) -1) {
136 while ((s = va_arg(ap, const char*))) {
138 if (s == (const char*) -1)
158 char **strv_new(const char *x, ...) {
163 r = strv_new_ap(x, ap);
169 int strv_extend_strv(char ***a, char **b) {
174 r = strv_extend(a, *s);
182 int strv_extend_strv_concat(char ***a, char **b, const char *suffix) {
189 v = strappend(*s, suffix);
203 char **strv_split(const char *s, const char *separator) {
204 const char *word, *state;
212 FOREACH_WORD_SEPARATOR(word, l, s, separator, state)
220 FOREACH_WORD_SEPARATOR(word, l, s, separator, state) {
221 r[i] = strndup(word, l);
234 int strv_split_quoted(char ***t, const char *s) {
235 const char *word, *state;
243 FOREACH_WORD_QUOTED(word, l, s, state)
254 FOREACH_WORD_QUOTED(word, l, s, state) {
255 r[i] = cunescape_length(word, l);
268 char **strv_split_newlines(const char *s) {
274 /* Special version of strv_split() that splits on newlines and
275 * suppresses an empty string at the end */
277 l = strv_split(s, NEWLINE);
285 if (isempty(l[n-1])) {
293 char *strv_join(char **l, const char *separator) {
301 k = strlen(separator);
317 e = stpcpy(e, separator);
327 char *strv_join_quoted(char **l) {
330 size_t allocated = 0, len = 0;
333 /* assuming here that escaped string cannot be more
334 * than twice as long, and reserving space for the
335 * separator and quotes.
337 _cleanup_free_ char *esc = NULL;
340 if (!GREEDY_REALLOC(buf, allocated,
341 len + strlen(*s) * 2 + 3))
348 needed = snprintf(buf + len, allocated - len, "%s\"%s\"",
349 len > 0 ? " " : "", esc);
350 assert(needed < allocated - len);
364 int strv_push(char ***l, char *value) {
372 c = realloc(*l, sizeof(char*) * (n + 2));
383 int strv_push_prepend(char ***l, char *value) {
391 c = new(char*, n + 2);
395 for (i = 0; i < n; i++)
407 int strv_consume(char ***l, char *value) {
410 r = strv_push(l, value);
417 int strv_consume_prepend(char ***l, char *value) {
420 r = strv_push_prepend(l, value);
427 int strv_extend(char ***l, const char *value) {
437 return strv_consume(l, v);
440 char **strv_uniq(char **l) {
443 /* Drops duplicate entries. The first identical string will be
444 * kept, the others dropped */
447 strv_remove(i+1, *i);
452 char **strv_remove(char **l, const char *s) {
460 /* Drops every occurrence of s in the string list, edits
463 for (f = t = l; *f; f++)
473 char **strv_parse_nulstr(const char *s, size_t l) {
475 unsigned c = 0, i = 0;
481 return new0(char*, 1);
483 for (p = s; p < s + l; p++)
490 v = new0(char*, c+1);
498 e = memchr(p, 0, s + l - p);
500 v[i] = strndup(p, e ? e - p : s + l - p);
519 char **strv_split_nulstr(const char *s) {
524 if (strv_extend(&r, i) < 0) {
530 return strv_new(NULL, NULL);
535 bool strv_overlap(char **a, char **b) {
539 if (strv_contains(b, *i))
545 static int str_compare(const void *_a, const void *_b) {
546 const char **a = (const char**) _a, **b = (const char**) _b;
548 return strcmp(*a, *b);
551 char **strv_sort(char **l) {
556 qsort(l, strv_length(l), sizeof(char*), str_compare);
560 void strv_print(char **l) {
567 int strv_extendf(char ***l, const char *format, ...) {
572 va_start(ap, format);
573 r = vasprintf(&x, format, ap);
579 return strv_consume(l, x);