src/types.cpp

   1 /*
   2  *
   3  *  D-Bus++ - C++ bindings for D-Bus
   4  *
   5  *  Copyright (C) 2005-2009  Paolo Durante <shackan@gmail.com>
   6  *
   7  *
   8  *  This library is free software; you can redistribute it and/or
   9  *  modify it under the terms of the GNU Lesser General Public
  10  *  License as published by the Free Software Foundation; either
  11  *  version 2.1 of the License, or (at your option) any later version.
  12  *
  13  *  This library is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  *  Lesser General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU Lesser General Public
  19  *  License along with this library; if not, write to the Free Software
  20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  */
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <dbus-c++/types.h>
  29 #include <dbus-c++/object.h>
  30 #include <dbus/dbus.h>
  31 #include <cstdlib>
  32 #include <stdarg.h>
  33
  34 #include "message_p.h"
  35 #include "internalerror.h"
  36
  37 using namespace DBus;
  38
  39 Variant::Variant()
  40 : _msg(CallMessage()) // dummy message used as temporary storage for variant data
  41 {
  42 }
  43
  44 Variant::Variant(MessageIter &it)
  45 : _msg(CallMessage())
  46 {
  47         MessageIter vi = it.recurse();
  48         MessageIter mi = _msg.writer();
  49         vi.copy_data(mi);
  50 }
  51
  52 Variant &Variant::operator = (const Variant &v)
  53 {
  54         if (&v != this)
  55         {
  56                 _msg = v._msg;
  57         }
  58         return *this;
  59 }
  60
  61 void Variant::clear()
  62 {
  63         CallMessage empty;
  64         _msg = empty;
  65 }
  66
  67 const Signature Variant::signature() const
  68 {
  69         char *sigbuf = reader().signature();
  70
  71    // Copy the signature
  72         Signature signature;
  73         if ( 0 != sigbuf )
  74         {
  75            signature = std::string(sigbuf);
  76            dbus_free(sigbuf);
  77         }
  78
  79         return signature;
  80 }
  81
  82 MessageIter &operator << (MessageIter &iter, const Variant &val)
  83 {
  84         const Signature sig = val.signature();
  85
  86         MessageIter rit = val.reader();
  87         MessageIter wit = iter.new_variant(sig.c_str());
  88
  89         rit.copy_data(wit);
  90
  91         iter.close_container(wit);
  92
  93         return iter;
  94 }
  95
  96 MessageIter &operator >> (MessageIter &iter, Variant &val)
  97 {
  98         if (iter.type() != DBUS_TYPE_VARIANT)
  99                 throw ErrorInvalidArgs("variant type expected");
 100
 101         val.clear();
 102
 103         MessageIter vit = iter.recurse();
 104         MessageIter mit = val.writer();
 105
 106         vit.copy_data(mit);
 107
 108         return ++iter;
 109 }
 110