code.delx.au - pulseaudio/blob - src/polypcore/modinfo.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
   8   published by the Free Software Foundation; either version 2 of the
   9   License, 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
  17   License 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 <ltdl.h>
  27 #include <assert.h>
  28
  29 #include <polyp/xmalloc.h>
  30
  31 #include <polypcore/util.h>
  32 #include <polypcore/log.h>
  33
  34 #include "modinfo.h"
  35
  36 #define PA_SYMBOL_AUTHOR "pa__get_author"
  37 #define PA_SYMBOL_DESCRIPTION "pa__get_description"
  38 #define PA_SYMBOL_USAGE "pa__get_usage"
  39 #define PA_SYMBOL_VERSION "pa__get_version"
  40
  41 pa_modinfo *pa_modinfo_get_by_handle(lt_dlhandle dl) {
  42     pa_modinfo *i;
  43     const char* (*func)(void);
  44     assert(dl);
  45
  46     i = pa_xnew0(pa_modinfo, 1);
  47
  48     if ((func = (const char* (*)(void)) lt_dlsym(dl, PA_SYMBOL_AUTHOR)))
  49         i->author = pa_xstrdup(func());
  50
  51     if ((func = (const char* (*)(void)) lt_dlsym(dl, PA_SYMBOL_DESCRIPTION)))
  52         i->description = pa_xstrdup(func());
  53
  54     if ((func = (const char* (*)(void)) lt_dlsym(dl, PA_SYMBOL_USAGE)))
  55         i->usage = pa_xstrdup(func());
  56
  57     if ((func = (const char* (*)(void)) lt_dlsym(dl, PA_SYMBOL_VERSION)))
  58         i->version = pa_xstrdup(func());
  59
  60     return i;
  61 }
  62
  63 pa_modinfo *pa_modinfo_get_by_name(const char *name) {
  64     lt_dlhandle dl;
  65     pa_modinfo *i;
  66     assert(name);
  67
  68     if (!(dl = lt_dlopenext(name))) {
  69         pa_log(__FILE__": Failed to open module \"%s\": %s", name, lt_dlerror());
  70         return NULL;
  71     }
  72
  73     i = pa_modinfo_get_by_handle(dl);
  74     lt_dlclose(dl);
  75
  76     return i;
  77 }
  78
  79 void pa_modinfo_free(pa_modinfo *i) {
  80     assert(i);
  81     pa_xfree(i->author);
  82     pa_xfree(i->description);
  83     pa_xfree(i->usage);
  84     pa_xfree(i->version);
  85     pa_xfree(i);
  86 }