src/basic/ordered-set.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2016 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include "ordered-set.h"
  21 #include "strv.h"
  22
  23 int ordered_set_consume(OrderedSet *s, void *p) {
  24         int r;
  25
  26         r = ordered_set_put(s, p);
  27         if (r <= 0)
  28                 free(p);
  29
  30         return r;
  31 }
  32
  33 int ordered_set_put_strdup(OrderedSet *s, const char *p) {
  34         char *c;
  35         int r;
  36
  37         assert(s);
  38         assert(p);
  39
  40         c = strdup(p);
  41         if (!c)
  42                 return -ENOMEM;
  43
  44         r = ordered_set_consume(s, c);
  45         if (r == -EEXIST)
  46                 return 0;
  47
  48         return r;
  49 }
  50
  51 int ordered_set_put_strdupv(OrderedSet *s, char **l) {
  52         int n = 0, r;
  53         char **i;
  54
  55         STRV_FOREACH(i, l) {
  56                 r = ordered_set_put_strdup(s, *i);
  57                 if (r < 0)
  58                         return r;
  59
  60                 n += r;
  61         }
  62
  63         return n;
  64 }