libcore/asobj/Error_as.cpp

   1 // Error_as.cpp:  ActionScript "Error" class, for Gnash.
   2 //
   3 //   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010,
   4 //   2011 Free Software Foundation, Inc
   5 //
   6 // This program is free software; you can redistribute it and/or modify
   7 // it under the terms of the GNU General Public License as published by
   8 // the Free Software Foundation; either version 3 of the License, or
   9 // (at your option) any later version.
  10 //
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License
  17 // along with this program; if not, write to the Free Software
  18 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19 //
  20
  21 #include "Error_as.h"
  22
  23 #include <sstream>
  24
  25 #include "as_object.h" // for inheritance
  26 #include "log.h"
  27 #include "fn_call.h"
  28 #include "Global_as.h"
  29 #include "GnashException.h"
  30 #include "as_value.h"
  31 #include "VM.h"
  32 #include "as_function.h"
  33
  34 namespace gnash {
  35
  36 namespace {
  37     as_value error_toString(const fn_call& fn);
  38     as_value error_ctor(const fn_call& fn);
  39
  40     void attachErrorInterface(as_object& o);
  41 }
  42
  43
  44 // extern
  45 void
  46 Error_class_init(as_object& where, const ObjectURI& uri)
  47 {
  48     registerBuiltinClass(where, error_ctor, attachErrorInterface, 0, uri);
  49 }
  50
  51
  52 namespace {
  53
  54 void
  55 attachErrorInterface(as_object& o)
  56 {
  57     Global_as& gl = getGlobal(o);
  58     int flags = 0;
  59
  60     o.init_member("toString", gl.createFunction(error_toString), flags);
  61
  62     o.init_member("message", "Error", flags);
  63     o.init_member("name", "Error", flags);
  64 }
  65
  66
  67 as_value
  68 error_toString(const fn_call& fn)
  69 {
  70         as_object* ptr = ensure<ValidThis>(fn);
  71
  72     VM& vm = getVM(*ptr);
  73     as_value message;
  74     ptr->get_member(getURI(vm, "message"), &message);
  75
  76         return as_value(message);
  77 }
  78
  79 /// "e = new Error();" returns an Error, "e = Error"; returns undefined.
  80 as_value
  81 error_ctor(const fn_call& fn)
  82 {
  83     as_object* err = fn.this_ptr;
  84     if (!err) return as_value();
  85
  86     VM& vm = getVM(fn);
  87
  88     if (fn.nargs && !fn.arg(0).is_undefined()) {
  89                 err->set_member(getURI(vm, "message"), fn.arg(0));
  90         }
  91
  92         return as_value();
  93 }
  94
  95 }
  96 } // end of gnash namespace