code.delx.au - pulseaudio/blob - polyp/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 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 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 "strlist.h"
  30 #include "xmalloc.h"
  31 #include "strbuf.h"
  32 #include "util.h"
  33
  34 struct pa_strlist {
  35     struct pa_strlist *next;
  36     char *str;
  37 };
  38
  39 struct pa_strlist* pa_strlist_prepend(struct pa_strlist *l, const char *s) {
  40     struct pa_strlist *n;
  41     assert(s);
  42     n = pa_xmalloc(sizeof(struct pa_strlist));
  43     n->str = pa_xstrdup(s);
  44     n->next = l;
  45     return  n;
  46 }
  47
  48 char *pa_strlist_tostring(struct pa_strlist *l) {
  49     int first = 1;
  50     struct pa_strbuf *b;
  51
  52     b = pa_strbuf_new();
  53     for (; l; l = l->next) {
  54         if (!first)
  55             pa_strbuf_puts(b, " ");
  56         first = 0;
  57         pa_strbuf_puts(b, l->str);
  58     }
  59
  60     return pa_strbuf_tostring_free(b);
  61 }
  62
  63 struct pa_strlist* pa_strlist_remove(struct pa_strlist *l, const char *s) {
  64     struct pa_strlist *ret = l, *prev = NULL;
  65     assert(l && s);
  66
  67     while (l) {
  68         if (!strcmp(l->str, s)) {
  69             struct pa_strlist *n = l->next;
  70
  71             if (!prev) {
  72                 assert(ret == l);
  73                 ret = n;
  74             } else
  75                 prev->next = n;
  76
  77             pa_xfree(l->str);
  78             pa_xfree(l);
  79
  80             l = n;
  81
  82         } else {
  83             prev = l;
  84             l = l->next;
  85         }
  86     }
  87
  88     return ret;
  89 }
  90
  91 void pa_strlist_free(struct pa_strlist *l) {
  92     while (l) {
  93         struct pa_strlist *c = l;
  94         l = l->next;
  95
  96         pa_xfree(c->str);
  97         pa_xfree(c);
  98     }
  99 }
 100
 101 struct pa_strlist* pa_strlist_pop(struct pa_strlist *l, char **s) {
 102     struct pa_strlist *r;
 103     assert(s);
 104
 105     if (!l) {
 106         *s = NULL;
 107         return NULL;
 108     }
 109
 110     *s = l->str;
 111     r = l->next;
 112     pa_xfree(l);
 113     return r;
 114 }
 115
 116 struct pa_strlist* pa_strlist_parse(const char *s) {
 117     struct pa_strlist *head = NULL, *p = NULL;
 118     const char *state = NULL;
 119     char *r;
 120
 121     while ((r = pa_split_spaces(s, &state))) {
 122         struct pa_strlist *n;
 123
 124         n = pa_xmalloc(sizeof(struct pa_strlist));
 125         n->str = r;
 126         n->next = NULL;
 127
 128         if (p)
 129             p->next = n;
 130         else
 131             head = n;
 132
 133         p = n;
 134     }
 135
 136     return head;
 137 }