* Replaced DownloadFactory's m_variables with a torrent::Object map.

* Starting work on moving the download commands to the new command
framework.


git-svn-id: svn://rakshasa.no/libtorrent/trunk/rtorrent@901 e378c898-3ddf-0310-93e7-cc216c733640

src/command_download.cc

@@ -37,9 +37,52 @@
 #include "config.h"
 
 #include <functional>
+#include <torrent/data/file.h>
+#include <torrent/data/file_list.h>
+
+#include "core/download.h"
+#include "utils/command_download_slot.h"
+
+#include "globals.h"
+#include "control.h"
+#include "command_helpers.h"
+
+std::string
+retrieve_d_base_path(core::Download* download) {
+  if (download->file_list()->is_multi_file())
+    return download->file_list()->root_dir();
+  else
+    return download->file_list()->at(0)->frozen_path();
+}
+
+std::string
+retrieve_d_base_filename(core::Download* download) {
+  std::string base;
+
+  if (download->file_list()->is_multi_file())
+    base = download->file_list()->root_dir();
+  else
+    base = download->file_list()->at(0)->frozen_path();
+
+  std::string::size_type split = base.rfind('/');
+
+  if (split == std::string::npos)
+    return base;
+  else
+    return base.substr(split + 1);
+}
+
+#define ADD_COMMAND_DOWNLOAD_SLOT(key, function, slot, parm, doc)    \
+  commandDownloadSlotsItr->set_slot(slot); \
+  variables->insert(key, commandDownloadSlotsItr++, NULL, &utils::CommandDownloadSlot::function, utils::VariableMap::flag_dont_delete | utils::VariableMap::flag_public_xmlrpc, parm, doc);
+
+#define ADD_COMMAND_DOWNLOAD_VOID(key, slot) \
+  ADD_COMMAND_DOWNLOAD_SLOT(key, call_unknown, utils::object_d_fn(slot), "i:", "")
 
 void
 initialize_command_download() {
-//   utils::VariableMap* variables = control->variable();
+  utils::VariableMap* variables = control->download_variables();
 
+  ADD_COMMAND_DOWNLOAD_VOID("base_path", &retrieve_d_base_path);
+  ADD_COMMAND_DOWNLOAD_VOID("base_filename", &retrieve_d_base_filename);
 }

src/command_helpers.cc

@@ -40,15 +40,18 @@
 
 #include "utils/command_slot.h"
 #include "utils/command_variable.h"
+#include "utils/command_download_slot.h"
 
 #include "globals.h"
 #include "control.h"
 #include "command_helpers.h"
 
-utils::CommandSlot      commandSlots[COMMAND_SLOTS_SIZE];
-utils::CommandSlot*     commandSlotsItr = commandSlots;
-utils::CommandVariable  commandVariables[COMMAND_VARIABLES_SIZE];
-utils::CommandVariable* commandVariablesItr = commandVariables;
+utils::CommandSlot          commandSlots[COMMAND_SLOTS_SIZE];
+utils::CommandSlot*         commandSlotsItr = commandSlots;
+utils::CommandVariable      commandVariables[COMMAND_VARIABLES_SIZE];
+utils::CommandVariable*     commandVariablesItr = commandVariables;
+utils::CommandDownloadSlot  commandDownloadSlots[COMMAND_DOWNLOAD_SLOTS_SIZE];
+utils::CommandDownloadSlot* commandDownloadSlotsItr = commandDownloadSlots;
 
 void initialize_download_variables();
 void initialize_command_download();
@@ -83,9 +86,9 @@ add_variable(const char* getKey, const char* setKey, const char* defaultSetKey,
   utils::CommandVariable* variable = commandVariablesItr++;
   variable->set_variable(defaultObject);
 
-  control->variable()->insert(getKey, variable, getSlot, utils::VariableMap::flag_dont_delete);
-  control->variable()->insert(setKey, variable, setSlot, utils::VariableMap::flag_dont_delete);
+  control->variable()->insert(getKey, variable, getSlot, NULL, utils::VariableMap::flag_dont_delete);
+  control->variable()->insert(setKey, variable, setSlot, NULL, utils::VariableMap::flag_dont_delete);
 
   if (defaultSetKey)
-    control->variable()->insert(defaultSetKey, variable, setSlot, utils::VariableMap::flag_dont_delete);
+    control->variable()->insert(defaultSetKey, variable, setSlot, NULL, utils::VariableMap::flag_dont_delete);
 }

src/command_helpers.h

@@ -42,19 +42,23 @@
 namespace utils {
   class CommandSlot;
   class CommandVariable;
+  class CommandDownloadSlot;
 }
 
 // By using a static array we avoid allocating the variables on the
 // heap. This should reduce memory use and improve cache locality.
-#define COMMAND_SLOTS_SIZE     100
-#define COMMAND_VARIABLES_SIZE 100
+#define COMMAND_SLOTS_SIZE          100
+#define COMMAND_VARIABLES_SIZE      100
+#define COMMAND_DOWNLOAD_SLOTS_SIZE 50
 
 #define ADDING_COMMANDS
 
-extern utils::CommandSlot      commandSlots[COMMAND_SLOTS_SIZE];
-extern utils::CommandSlot*     commandSlotsItr;
-extern utils::CommandVariable  commandVariables[COMMAND_VARIABLES_SIZE];
-extern utils::CommandVariable* commandVariablesItr;
+extern utils::CommandSlot          commandSlots[COMMAND_SLOTS_SIZE];
+extern utils::CommandSlot*         commandSlotsItr;
+extern utils::CommandVariable      commandVariables[COMMAND_VARIABLES_SIZE];
+extern utils::CommandVariable*     commandVariablesItr;
+extern utils::CommandDownloadSlot  commandDownloadSlots[COMMAND_DOWNLOAD_SLOTS_SIZE];
+extern utils::CommandDownloadSlot* commandDownloadSlotsItr;
 
 void initialize_commands();
 
@@ -74,17 +78,17 @@ add_variable("get_" key, "set_" key, key, &utils::CommandVariable::get_string, &
 
 #define ADD_COMMAND_SLOT(key, function, slot, parm, doc)    \
   commandSlotsItr->set_slot(slot); \
-  variables->insert(key, commandSlotsItr++, &utils::CommandSlot::function, utils::VariableMap::flag_dont_delete | utils::VariableMap::flag_public_xmlrpc, parm, doc);
+  variables->insert(key, commandSlotsItr++, &utils::CommandSlot::function, NULL, utils::VariableMap::flag_dont_delete | utils::VariableMap::flag_public_xmlrpc, parm, doc);
 
 #define ADD_COMMAND_SLOT_PRIVATE(key, function, slot) \
   commandSlotsItr->set_slot(slot); \
-  variables->insert(key, commandSlotsItr++, &utils::CommandSlot::function, utils::VariableMap::flag_dont_delete);
+  variables->insert(key, commandSlotsItr++, &utils::CommandSlot::function, NULL, utils::VariableMap::flag_dont_delete);
 
 #define ADD_COMMAND_COPY(key, function, parm, doc) \
-  variables->insert(key, (commandSlotsItr - 1), &utils::CommandSlot::function, utils::VariableMap::flag_dont_delete | utils::VariableMap::flag_public_xmlrpc, parm, doc);
+  variables->insert(key, (commandSlotsItr - 1), &utils::CommandSlot::function, NULL, utils::VariableMap::flag_dont_delete | utils::VariableMap::flag_public_xmlrpc, parm, doc);
 
 #define ADD_COMMAND_COPY_PRIVATE(key, function) \
-  variables->insert(key, (commandSlotsItr - 1), &utils::CommandSlot::function, utils::VariableMap::flag_dont_delete);
+  variables->insert(key, (commandSlotsItr - 1), &utils::CommandSlot::function, NULL, utils::VariableMap::flag_dont_delete);
 
 #define ADD_COMMAND_VALUE_TRI(key, set, get) \
   ADD_COMMAND_SLOT_PRIVATE(key,        call_value, utils::object_value_fn(set))      \

src/core/download_factory.cc

@@ -78,7 +78,7 @@ DownloadFactory::DownloadFactory(const std::string& uri, Manager* m) :
 
   m_variables["connection_leech"] = control->variable()->call_command_void("get_connection_leech");
   m_variables["connection_seed"]  = control->variable()->call_command_void("get_connection_seed");
-  m_variables["directory"]        = control->variable()->call_command_void("directory");
+  m_variables["directory"]        = control->variable()->call_command_void("get_directory");
   m_variables["tied_to_file"]     = torrent::Object((int64_t)false);
 }
 
@@ -175,7 +175,7 @@ DownloadFactory::receive_success() {
 
   // Move to 'rtorrent'.
   download->set("connection_leech", m_variables["connection_leech"]);
-  download->set("connection_seed",  m_variables["get_connection_seed"]);
+  download->set("connection_seed",  m_variables["connection_seed"]);
 
   download->set("max_uploads",      control->variable()->call_command_void("get_max_uploads"));
   download->set("min_peers",        control->variable()->call_command_void("get_min_peers"));
@@ -206,7 +206,7 @@ DownloadFactory::receive_success() {
                             control->variable()->call_command_string("split_suffix"));
 
   if (!rtorrent->has_key_string("directory"))
-    download->set("directory", m_variables["get_directory"]);
+    download->set("directory", m_variables["directory"]);
   else
     download->set("directory", rtorrent->get_key("directory"));
 

src/option_handler_rules.cc

@@ -191,31 +191,6 @@ apply_d_delete_link(core::Download* download, const torrent::Object::list_type&
     ; //     control->core()->push_log("delete_link failed: " + std::string(rak::error_number::current().c_str()));
 }
 
-std::string
-retrieve_d_base_path(core::Download* download) {
-  if (download->file_list()->is_multi_file())
-    return download->file_list()->root_dir();
-  else
-    return download->file_list()->at(0)->frozen_path();
-}
-
-std::string
-retrieve_d_base_filename(core::Download* download) {
-  std::string base;
-
-  if (download->file_list()->is_multi_file())
-    base = download->file_list()->root_dir();
-  else
-    base = download->file_list()->at(0)->frozen_path();
-
-  std::string::size_type split = base.rfind('/');
-
-  if (split == std::string::npos)
-    return base;
-  else
-    return base.substr(split + 1);
-}
-
 void
 initialize_download_variables() {
   utils::VariableMap* variables = control->download_variables();
@@ -244,8 +219,6 @@ initialize_download_variables() {
 
   variables->insert("directory",          new utils::VariableDownloadStringSlot(rak::ftor_fn1(rak::on(std::mem_fun(&core::Download::file_list), std::mem_fun(&torrent::FileList::root_dir))),
                                                                                 rak::ftor_fn2(std::mem_fun(&core::Download::set_root_directory))));
-  variables->insert("base_path",          new utils::VariableDownloadStringSlot(rak::ptr_fn(&retrieve_d_base_path), NULL));
-  variables->insert("base_filename",      new utils::VariableDownloadStringSlot(rak::ptr_fn(&retrieve_d_base_filename), NULL));
 
   variables->insert("min_peers",          var_d_value(&core::Download::download, &torrent::Download::peers_min, &torrent::Download::set_peers_min));
   variables->insert("max_peers",          var_d_value(&core::Download::download, &torrent::Download::peers_max, &torrent::Download::set_peers_max));

src/utils/Makefile.am

@@ -3,6 +3,8 @@ noinst_LIBRARIES = libsub_utils.a
 libsub_utils_a_SOURCES = \
 	command_slot.cc \
 	command_slot.h \
+	command_download_slot.cc \
+	command_download_slot.h \
 	command_variable.cc \
 	command_variable.h \
 	directory.cc \

src/utils/command_download_slot.cc

@@ -0,0 +1,143 @@
+// rTorrent - BitTorrent client
+// Copyright (C) 2006, Jari Sundell
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+//
+// In addition, as a special exception, the copyright holders give
+// permission to link the code of portions of this program with the
+// OpenSSL library under certain conditions as described in each
+// individual source file, and distribute linked combinations
+// including the two.
+//
+// You must obey the GNU General Public License in all respects for
+// all of the code used other than OpenSSL.  If you modify file(s)
+// with this exception, you may extend this exception to your version
+// of the file(s), but you are not obligated to do so.  If you do not
+// wish to do so, delete this exception statement from your version.
+// If you delete this exception statement from all source files in the
+// program, then also delete it here.
+//
+// Contact:  Jari Sundell <jaris@ifi.uio.no>
+//
+//           Skomakerveien 33
+//           3185 Skoppum, NORWAY
+
+#include "config.h"
+
+#include "utils/parse.h"
+
+#include "command_download_slot.h"
+
+namespace utils {
+
+const torrent::Object
+CommandDownloadSlot::call_unknown(Variable* rawVariable, core::Download* download, const torrent::Object& rawArgs) {
+  CommandDownloadSlot* command = static_cast<CommandDownloadSlot*>(rawVariable);
+
+  return command->m_slot(download, rawArgs);
+}
+
+const torrent::Object
+CommandDownloadSlot::call_list(Variable* rawVariable, core::Download* download, const torrent::Object& rawArgs) {
+  CommandDownloadSlot* command = static_cast<CommandDownloadSlot*>(rawVariable);
+
+//   const torrent::Object& arg = to_single_argument(rawArgs);
+
+//   switch (arg.type()) {
+//   case torrent::Object::TYPE_VALUE:
+//     variable->m_variable = arg.as_value() ? (int64_t)1 : (int64_t)0;
+//     break;
+
+//   case torrent::Object::TYPE_STRING:
+//     // Move the checks into some is_true, is_false think in Variable.
+//     if (arg.as_string() == "yes" || arg.as_string() == "true")
+//       variable->m_variable = (int64_t)1;
+
+//     else if (arg.as_string() == "no" || arg.as_string() == "false")
+//       variable->m_variable = (int64_t)0;
+
+//     else
+//       throw torrent::input_error("String does not parse as a boolean.");
+
+//     break;
+
+//   default:
+//     throw torrent::input_error("Input is not a boolean.");
+//   }
+
+//   return variable->m_variable;
+
+  switch (rawArgs.type()) {
+//   case torrent::Object::TYPE_STRING:
+//     break;
+  case torrent::Object::TYPE_LIST:
+    return command->m_slot(download, rawArgs);
+  default:
+    throw torrent::input_error("Not a list.");
+  }
+}
+
+const torrent::Object
+CommandDownloadSlot::call_value_base(Variable* rawVariable, core::Download* download, const torrent::Object& rawArgs, int base, int unit) {
+  CommandDownloadSlot* command = static_cast<CommandDownloadSlot*>(rawVariable);
+
+  const torrent::Object& arg = to_single_argument(rawArgs);
+
+  switch (arg.type()) {
+  case torrent::Object::TYPE_VALUE:
+    // Should shift this one too, so it gives the right unit.
+    return command->m_slot(download, arg);
+
+  case torrent::Object::TYPE_STRING:
+  {
+    torrent::Object argValue(torrent::Object::TYPE_VALUE);
+
+    if (!utils::parse_whole_value_nothrow(arg.as_string().c_str(), &argValue.as_value(), base, unit))
+      throw torrent::input_error("Not a value.");
+
+    return command->m_slot(download, argValue);
+  }
+  default:
+    throw torrent::input_error("Not a value.");
+  }
+}
+
+const torrent::Object
+CommandDownloadSlot::call_string(Variable* rawVariable, core::Download* download, const torrent::Object& rawArgs) {
+  CommandDownloadSlot* command = static_cast<CommandDownloadSlot*>(rawVariable);
+
+  const torrent::Object& arg = to_single_argument(rawArgs);
+
+  switch (arg.type()) {
+//   case torrent::Object::TYPE_VALUE:
+//     break;
+
+  case torrent::Object::TYPE_STRING:
+    return command->m_slot(download, arg);
+    break;
+
+  default:
+    throw torrent::input_error("Not a string.");
+  }
+}
+
+// const torrent::Object&
+// CommandDownloadSlot::get_generic(Variable* rawVariable, const torrent::Object& args) {
+//   CommandVariable* variable = static_cast<CommandVariable*>(rawVariable);
+
+//   return variable->m_variable;
+// }
+
+}

src/utils/command_download_slot.h

@@ -0,0 +1,176 @@
+// rTorrent - BitTorrent client
+// Copyright (C) 2006, Jari Sundell
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+//
+// In addition, as a special exception, the copyright holders give
+// permission to link the code of portions of this program with the
+// OpenSSL library under certain conditions as described in each
+// individual source file, and distribute linked combinations
+// including the two.
+//
+// You must obey the GNU General Public License in all respects for
+// all of the code used other than OpenSSL.  If you modify file(s)
+// with this exception, you may extend this exception to your version
+// of the file(s), but you are not obligated to do so.  If you do not
+// wish to do so, delete this exception statement from your version.
+// If you delete this exception statement from all source files in the
+// program, then also delete it here.
+//
+// Contact:  Jari Sundell <jaris@ifi.uio.no>
+//
+//           Skomakerveien 33
+//           3185 Skoppum, NORWAY
+
+#ifndef RTORRENT_UTILS_COMMAND_DOWNLOAD_SLOT_H
+#define RTORRENT_UTILS_COMMAND_DOWNLOAD_SLOT_H
+
+#include <functional>
+#include <limits>
+#include <inttypes.h>
+#include <torrent/object.h>
+#include <rak/functional_fun.h>
+
+#include "variable.h"
+
+namespace core {
+  class Download;
+}
+
+namespace utils {
+
+class CommandDownloadSlot : public Variable {
+public:
+  typedef rak::function2<torrent::Object, core::Download*, const torrent::Object&> slot_type;
+
+  CommandDownloadSlot() {}
+
+  CommandDownloadSlot(slot_type::base_type* s) {
+    m_slot.set(s);
+  }
+
+  void                set_slot(slot_type::base_type* s) { m_slot.set(s); }
+
+  static const torrent::Object call_unknown(Variable* rawVariable, core::Download* download, const torrent::Object& args);
+
+  static const torrent::Object call_list(Variable* rawVariable, core::Download* download, const torrent::Object& args);
+  static const torrent::Object call_string(Variable* rawVariable, core::Download* download, const torrent::Object& args);
+
+  static const torrent::Object call_value_base(Variable* rawVariable, core::Download* download, const torrent::Object& args, int base, int unit);
+
+  static const torrent::Object call_value(Variable* rawVariable, core::Download* download, const torrent::Object& args) { return call_value_base(rawVariable, download, args, 0, 1); }
+  static const torrent::Object call_value_kb(Variable* rawVariable, core::Download* download, const torrent::Object& args) { return call_value_base(rawVariable, download, args, 0, 1 << 10); }
+
+  template <int base, int unit>
+  static const torrent::Object call_value(Variable* rawVariable, core::Download* download, const torrent::Object& args)  { return call_value_base(rawVariable, download, args, base, unit); }
+
+//   static const torrent::Object& get_list(Variable* rawVariable, const torrent::Object& args);
+
+private:
+  slot_type           m_slot;
+};
+
+// Some slots that convert torrent::Object arguments to proper
+// function calls.
+
+template <typename Func, typename Result = typename Func::result_type>
+class object_d_void_fn_t : public rak::function_base2<torrent::Object, core::Download*, const torrent::Object&> {
+public:
+  object_d_void_fn_t(Func func) : m_func(func) {}
+  
+  virtual torrent::Object operator () (core::Download* download, const torrent::Object& arg1) { return torrent::Object(m_func(download)); }
+
+private:
+  Func m_func;
+};
+
+// template <typename Func>
+// class object_void_fn_t<Func, void> : public rak::function_base1<torrent::Object, const torrent::Object&> {
+// public:
+//   object_void_fn_t(Func func) : m_func(func) {}
+  
+//   virtual torrent::Object operator () (const torrent::Object& arg1) {
+//     m_func();
+//     return torrent::Object();
+//   }
+
+// private:
+//   Func m_func;
+// };
+
+// template <typename Func, typename Result = typename Func::result_type>
+// class object_value_fn1_t : public rak::function_base1<torrent::Object, const torrent::Object&> {
+// public:
+//   object_value_fn1_t(Func func) : m_func(func) {}
+  
+//   virtual torrent::Object operator () (const torrent::Object& arg1) { return torrent::Object((int64_t)m_func(arg1.as_value())); }
+
+// private:
+//   Func m_func;
+// };
+
+// template <typename Func>
+// class object_value_fn1_t<Func, void> : public rak::function_base1<torrent::Object, const torrent::Object&> {
+// public:
+//   object_value_fn1_t(Func func) : m_func(func) {}
+  
+//   virtual torrent::Object operator () (const torrent::Object& arg1) {
+//     m_func(arg1.as_value());
+
+//     return torrent::Object();
+//   }
+
+// private:
+//   Func m_func;
+// };
+
+// template <typename Func, typename Result = typename Func::result_type>
+// class object_string_fn1_t : public rak::function_base1<torrent::Object, const torrent::Object&> {
+// public:
+//   object_string_fn1_t(Func func) : m_func(func) {}
+  
+//   virtual torrent::Object operator () (const torrent::Object& arg1) { return torrent::Object(m_func(arg1.as_string())); }
+
+// private:
+//   Func m_func;
+// };
+
+// template <typename Func>
+// class object_string_fn1_t<Func, void> : public rak::function_base1<torrent::Object, const torrent::Object&> {
+// public:
+//   object_string_fn1_t(Func func) : m_func(func) {}
+  
+//   virtual torrent::Object operator () (const torrent::Object& arg1) {
+//     m_func(arg1.as_string());
+
+//     return torrent::Object();
+//   }
+
+// private:
+//   Func m_func;
+// };
+
+template <typename Return> object_d_void_fn_t<Return (*)(core::Download*), Return>*
+object_d_fn(Return (*func)(core::Download*)) {
+  return new object_d_void_fn_t<Return (*)(core::Download*), Return>(func);
+}
+
+// template <typename Func> object_void_fn_t<Func>*    object_void_fn(Func func)   { return new object_void_fn_t<Func>(func); }
+// template <typename Func> object_value_fn1_t<Func>*  object_value_fn(Func func)  { return new object_value_fn1_t<Func>(func); }
+// template <typename Func> object_string_fn1_t<Func>* object_string_fn(Func func) { return new object_string_fn1_t<Func>(func); }
+
+}
+
+#endif

src/utils/command_slot.h

@@ -38,7 +38,6 @@
 #define RTORRENT_UTILS_COMMAND_SLOT_H
 
 #include <functional>
-#include <string>
 #include <limits>
 #include <inttypes.h>
 #include <torrent/object.h>
@@ -48,10 +47,6 @@
 
 namespace utils {
 
-// The CommandSlot class uses union instead of creating multiple
-// derived classes so that it is possible to create an array
-// containing different slot types.
-
 class CommandSlot : public Variable {
 public:
   typedef rak::function1<torrent::Object, const torrent::Object&> slot_type;

src/utils/variable_map.cc

@@ -62,14 +62,14 @@ VariableMap::~VariableMap() {
 }
 
 void
-VariableMap::insert(key_type key, Variable* variable, generic_slot genericSlot, int flags,
+VariableMap::insert(key_type key, Variable* variable, generic_slot genericSlot, download_slot downloadSlot, int flags,
                     const char* parm, const char* doc) {
   iterator itr = base_type::find(key);
 
   if (itr != base_type::end())
     throw torrent::internal_error("VariableMap::insert(...) tried to insert an already existing key.");
 
-  base_type::insert(itr, value_type(key, variable_map_data_type(variable, genericSlot, NULL, flags, parm, doc)));
+  base_type::insert(itr, value_type(key, variable_map_data_type(variable, genericSlot, downloadSlot, flags, parm, doc)));
 }
 
 const VariableMap::mapped_type
@@ -250,4 +250,21 @@ VariableMap::call_command(key_type key, const mapped_type& arg) {
   return itr->second.m_genericSlot(itr->second.m_variable, arg);
 }
 
+const VariableMap::mapped_type
+VariableMap::call_command_d(key_type key, core::Download* download, const mapped_type& arg) {
+  const_iterator itr = base_type::find(key);
+
+  if (itr == base_type::end())
+    throw torrent::input_error("Variable \"" + std::string(key) + "\" does not exist.");
+
+  if (itr->second.m_downloadSlot == NULL) {
+    if (itr->second.m_genericSlot == NULL)
+      throw torrent::input_error("Variable does not have a generic slot.");
+
+    return itr->second.m_genericSlot(itr->second.m_variable, arg);
+  }
+
+  return itr->second.m_downloadSlot(itr->second.m_variable, download, arg);
+}
+
 }

src/utils/variable_map.h

@@ -112,7 +112,7 @@ public:
 
   // Allow NULL slot as a temporary compatibility hack.
 
-  void                insert(key_type key, Variable* variable, generic_slot genericSlot = NULL, int flags = 0,
+  void                insert(key_type key, Variable* variable, generic_slot genericSlot = NULL, download_slot downloadSlot = NULL, int flags = 0,
                              const char* parm = "", const char* doc = "");
 
   // Consider uninlining the helper functions.
@@ -147,6 +147,8 @@ public:
   void                call_command_set_string(key_type key, const std::string& arg)               { call_command(key, mapped_type(arg)); }
   void                call_command_set_std_string(const std::string& key, const std::string& arg) { call_command(key.c_str(), mapped_type(arg)); }
 
+  const mapped_type   call_command_d(key_type key, core::Download* download, const mapped_type& arg);
+
 private:
   VariableMap(const VariableMap&);
   void operator = (const VariableMap&);