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 <polypcore/xmalloc.h>
  30 #include <polypcore/strbuf.h>
  31 #include <polypcore/util.h>
  32
  33 #include "strlist.h"
  34
  35 struct pa_strlist {
  36     pa_strlist *next;
  37     char *str;
  38 };
  39
  40 pa_strlist* pa_strlist_prepend(pa_strlist *l, const char *s) {
  41     pa_strlist *n;
  42     assert(s);
  43     n = pa_xmalloc(sizeof(pa_strlist));
  44     n->str = pa_xstrdup(s);
  45     n->next = l;
  46     return  n;
  47 }
  48
  49 char *pa_strlist_tostring(pa_strlist *l) {
  50     int first = 1;
  51     pa_strbuf *b;
  52
  53     b = pa_strbuf_new();
  54     for (; l; l = l->next) {
  55         if (!first)
  56             pa_strbuf_puts(b, " ");
  57         first = 0;
  58         pa_strbuf_puts(b, l->str);
  59     }
  60
  61     return pa_strbuf_tostring_free(b);
  62 }
  63
  64 pa_strlist* pa_strlist_remove(pa_strlist *l, const char *s) {
  65     pa_strlist *ret = l, *prev = NULL;
  66     assert(l && s);
  67
  68     while (l) {
  69         if (!strcmp(l->str, s)) {
  70             pa_strlist *n = l->next;
  71
  72             if (!prev) {
  73                 assert(ret == l);
  74                 ret = n;
  75             } else
  76                 prev->next = n;
  77
  78             pa_xfree(l->str);
  79             pa_xfree(l);
  80
  81             l = n;
  82
  83         } else {
  84             prev = l;
  85             l = l->next;
  86         }
  87     }
  88
  89     return ret;
  90 }
  91
  92 void pa_strlist_free(pa_strlist *l) {
  93     while (l) {
  94         pa_strlist *c = l;
  95         l = l->next;
  96
  97         pa_xfree(c->str);
  98         pa_xfree(c);
  99     }
 100 }
 101
 102 pa_strlist* pa_strlist_pop(pa_strlist *l, char **s) {
 103     pa_strlist *r;
 104     assert(s);
 105
 106     if (!l) {
 107         *s = NULL;
 108         return NULL;
 109     }
 110
 111     *s = l->str;
 112     r = l->next;
 113     pa_xfree(l);
 114     return r;
 115 }
 116
 117 pa_strlist* pa_strlist_parse(const char *s) {
 118     pa_strlist *head = NULL, *p = NULL;
 119     const char *state = NULL;
 120     char *r;
 121
 122     while ((r = pa_split_spaces(s, &state))) {
 123         pa_strlist *n;
 124
 125         n = pa_xmalloc(sizeof(pa_strlist));
 126         n->str = r;
 127         n->next = NULL;
 128
 129         if (p)
 130             p->next = n;
 131         else
 132             head = n;
 133
 134         p = n;
 135     }
 136
 137     return head;
 138 }