code.delx.au - pulseaudio/blob - polyp/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 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 <ltdl.h>
  27 #include <assert.h>
  28
  29 #include "xmalloc.h"
  30 #include "util.h"
  31 #include "modinfo.h"
  32 #include "log.h"
  33
  34 #define PA_SYMBOL_AUTHOR "pa__get_author"
  35 #define PA_SYMBOL_DESCRIPTION "pa__get_description"
  36 #define PA_SYMBOL_USAGE "pa__get_usage"
  37 #define PA_SYMBOL_VERSION "pa__get_version"
  38
  39 struct pa_modinfo *pa_modinfo_get_by_handle(lt_dlhandle dl) {
  40     struct pa_modinfo *i;
  41     const char* (*func)(void);
  42     assert(dl);
  43
  44     i = pa_xmalloc0(sizeof(struct pa_modinfo));
  45
  46     if ((func = (const char* (*)(void)) lt_dlsym(dl, PA_SYMBOL_AUTHOR)))
  47         i->author = pa_xstrdup(func());
  48
  49     if ((func = (const char* (*)(void)) lt_dlsym(dl, PA_SYMBOL_DESCRIPTION)))
  50         i->description = pa_xstrdup(func());
  51
  52     if ((func = (const char* (*)(void)) lt_dlsym(dl, PA_SYMBOL_USAGE)))
  53         i->usage = pa_xstrdup(func());
  54
  55     if ((func = (const char* (*)(void)) lt_dlsym(dl, PA_SYMBOL_VERSION)))
  56         i->version = pa_xstrdup(func());
  57
  58     return i;
  59 }
  60
  61 struct pa_modinfo *pa_modinfo_get_by_name(const char *name) {
  62     lt_dlhandle dl;
  63     struct pa_modinfo *i;
  64     assert(name);
  65
  66     if (!(dl = lt_dlopenext(name))) {
  67         pa_log(__FILE__": Failed to open module \"%s\": %s\n", name, lt_dlerror());
  68         return NULL;
  69     }
  70
  71     i = pa_modinfo_get_by_handle(dl);
  72     lt_dlclose(dl);
  73
  74     return i;
  75 }
  76
  77 void pa_modinfo_free(struct pa_modinfo *i) {
  78     assert(i);
  79     pa_xfree(i->author);
  80     pa_xfree(i->description);
  81     pa_xfree(i->usage);
  82     pa_xfree(i->version);
  83     pa_xfree(i);
  84 }