code.delx.au - pulseaudio/blob - src/pulsecore/x11prop.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <string.h>
  29
  30 #include <X11/Xlib.h>
  31 #include <X11/Xatom.h>
  32
  33 #include "x11prop.h"
  34
  35 void pa_x11_set_prop(Display *d, const char *name, const char *data) {
  36     Atom a = XInternAtom(d, name, False);
  37     XChangeProperty(d, RootWindow(d, 0), a, XA_STRING, 8, PropModeReplace, (const unsigned char*) data, strlen(data)+1);
  38 }
  39
  40 void pa_x11_del_prop(Display *d, const char *name) {
  41     Atom a = XInternAtom(d, name, False);
  42     XDeleteProperty(d, RootWindow(d, 0), a);
  43 }
  44
  45 char* pa_x11_get_prop(Display *d, const char *name, char *p, size_t l) {
  46     Atom actual_type;
  47     int actual_format;
  48     unsigned long nitems;
  49     unsigned long nbytes_after;
  50     unsigned char *prop = NULL;
  51     char *ret = NULL;
  52
  53     Atom a = XInternAtom(d, name, False);
  54     if (XGetWindowProperty(d, RootWindow(d, 0), a, 0, (l+2)/4, False, XA_STRING, &actual_type, &actual_format, &nitems, &nbytes_after, &prop) != Success)
  55         goto finish;
  56
  57     if (actual_type != XA_STRING)
  58         goto finish;
  59
  60     memcpy(p, prop, nitems);
  61     p[nitems] = 0;
  62
  63     ret = p;
  64
  65 finish:
  66
  67     if (prop)
  68         XFree(prop);
  69
  70     return ret;
  71 }