code.delx.au - pulseaudio/blob - src/polypcore/strlist.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   polypaudio 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   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with polypaudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <string.h>
  27 #include <assert.h>
  28
  29 #include <polyp/xmalloc.h>
  30
  31 #include <polypcore/strbuf.h>
  32 #include <polypcore/core-util.h>
  33
  34 #include "strlist.h"
  35
  36 struct pa_strlist {
  37     pa_strlist *next;
  38     char *str;
  39 };
  40
  41 pa_strlist* pa_strlist_prepend(pa_strlist *l, const char *s) {
  42     pa_strlist *n;
  43     assert(s);
  44     n = pa_xmalloc(sizeof(pa_strlist));
  45     n->str = pa_xstrdup(s);
  46     n->next = l;
  47     return  n;
  48 }
  49
  50 char *pa_strlist_tostring(pa_strlist *l) {
  51     int first = 1;
  52     pa_strbuf *b;
  53
  54     b = pa_strbuf_new();
  55     for (; l; l = l->next) {
  56         if (!first)
  57             pa_strbuf_puts(b, " ");
  58         first = 0;
  59         pa_strbuf_puts(b, l->str);
  60     }
  61
  62     return pa_strbuf_tostring_free(b);
  63 }
  64
  65 pa_strlist* pa_strlist_remove(pa_strlist *l, const char *s) {
  66     pa_strlist *ret = l, *prev = NULL;
  67     assert(l && s);
  68
  69     while (l) {
  70         if (!strcmp(l->str, s)) {
  71             pa_strlist *n = l->next;
  72
  73             if (!prev) {
  74                 assert(ret == l);
  75                 ret = n;
  76             } else
  77                 prev->next = n;
  78
  79             pa_xfree(l->str);
  80             pa_xfree(l);
  81
  82             l = n;
  83
  84         } else {
  85             prev = l;
  86             l = l->next;
  87         }
  88     }
  89
  90     return ret;
  91 }
  92
  93 void pa_strlist_free(pa_strlist *l) {
  94     while (l) {
  95         pa_strlist *c = l;
  96         l = l->next;
  97
  98         pa_xfree(c->str);
  99         pa_xfree(c);
 100     }
 101 }
 102
 103 pa_strlist* pa_strlist_pop(pa_strlist *l, char **s) {
 104     pa_strlist *r;
 105     assert(s);
 106
 107     if (!l) {
 108         *s = NULL;
 109         return NULL;
 110     }
 111
 112     *s = l->str;
 113     r = l->next;
 114     pa_xfree(l);
 115     return r;
 116 }
 117
 118 pa_strlist* pa_strlist_parse(const char *s) {
 119     pa_strlist *head = NULL, *p = NULL;
 120     const char *state = NULL;
 121     char *r;
 122
 123     while ((r = pa_split_spaces(s, &state))) {
 124         pa_strlist *n;
 125
 126         n = pa_xmalloc(sizeof(pa_strlist));
 127         n->str = r;
 128         n->next = NULL;
 129
 130         if (p)
 131             p->next = n;
 132         else
 133             head = n;
 134
 135         p = n;
 136     }
 137
 138     return head;
 139 }