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 char **strv_split_quoted(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);
267 char **strv_split_newlines(const char *s) {
273 /* Special version of strv_split() that splits on newlines and
274 * suppresses an empty string at the end */
276 l = strv_split(s, NEWLINE);
284 if (isempty(l[n-1])) {
292 char *strv_join(char **l, const char *separator) {
300 k = strlen(separator);
316 e = stpcpy(e, separator);
326 char *strv_join_quoted(char **l) {
329 size_t allocated = 0, len = 0;
332 /* assuming here that escaped string cannot be more
333 * than twice as long, and reserving space for the
334 * separator and quotes.
336 _cleanup_free_ char *esc = NULL;
339 if (!GREEDY_REALLOC(buf, allocated,
340 len + strlen(*s) * 2 + 3))
347 needed = snprintf(buf + len, allocated - len, "%s\"%s\"",
348 len > 0 ? " " : "", esc);
349 assert(needed < allocated - len);
363 int strv_push(char ***l, char *value) {
371 c = realloc(*l, sizeof(char*) * (n + 2));
382 int strv_push_prepend(char ***l, char *value) {
390 c = new(char*, n + 2);
394 for (i = 0; i < n; i++)
406 int strv_consume(char ***l, char *value) {
409 r = strv_push(l, value);
416 int strv_consume_prepend(char ***l, char *value) {
419 r = strv_push_prepend(l, value);
426 int strv_extend(char ***l, const char *value) {
436 return strv_consume(l, v);
439 char **strv_uniq(char **l) {
442 /* Drops duplicate entries. The first identical string will be
443 * kept, the others dropped */
446 strv_remove(i+1, *i);
451 char **strv_remove(char **l, const char *s) {
459 /* Drops every occurrence of s in the string list, edits
462 for (f = t = l; *f; f++)
472 char **strv_parse_nulstr(const char *s, size_t l) {
474 unsigned c = 0, i = 0;
480 return new0(char*, 1);
482 for (p = s; p < s + l; p++)
489 v = new0(char*, c+1);
497 e = memchr(p, 0, s + l - p);
499 v[i] = strndup(p, e ? e - p : s + l - p);
518 char **strv_split_nulstr(const char *s) {
523 if (strv_extend(&r, i) < 0) {
529 return strv_new(NULL, NULL);
534 bool strv_overlap(char **a, char **b) {
538 if (strv_contains(b, *i))
544 static int str_compare(const void *_a, const void *_b) {
545 const char **a = (const char**) _a, **b = (const char**) _b;
547 return strcmp(*a, *b);
550 char **strv_sort(char **l) {
555 qsort(l, strv_length(l), sizeof(char*), str_compare);
559 void strv_print(char **l) {
566 int strv_extendf(char ***l, const char *format, ...) {
571 va_start(ap, format);
572 r = vasprintf(&x, format, ap);
578 return strv_consume(l, x);