A Discrete-Event Network Simulator
API
attribute-helper.h
Go to the documentation of this file.
1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2008 INRIA
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation;
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  *
18  * Authors: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
19  */
20 #ifndef ATTRIBUTE_HELPER_H
21 #define ATTRIBUTE_HELPER_H
22 
23 #include "attribute.h"
25 #include <sstream>
26 #include "abort.h"
27 
34 namespace ns3 {
35 
96 template <typename T, typename BASE>
97 Ptr<AttributeChecker>
98 MakeSimpleAttributeChecker (std::string name, std::string underlying)
99 {
104  struct SimpleAttributeChecker : public BASE
105  {
106  virtual bool Check (const AttributeValue &value) const
107  {
108  return dynamic_cast<const T *> (&value) != 0;
109  }
110  virtual std::string GetValueTypeName (void) const
111  {
112  return m_type;
113  }
114  virtual bool HasUnderlyingTypeInformation (void) const
115  {
116  return true;
117  }
118  virtual std::string GetUnderlyingTypeInformation (void) const
119  {
120  return m_underlying;
121  }
122  virtual Ptr<AttributeValue> Create (void) const
123  {
124  return ns3::Create<T> ();
125  }
126  virtual bool Copy (const AttributeValue &source, AttributeValue &destination) const
127  {
128  const T *src = dynamic_cast<const T *> (&source);
129  T *dst = dynamic_cast<T *> (&destination);
130  if (src == 0 || dst == 0)
131  {
132  return false;
133  }
134  *dst = *src;
135  return true;
136  }
137  std::string m_type; // The name of the AttributeValue type.
138  std::string m_underlying; // The underlying attribute type name.
139  } *checker = new SimpleAttributeChecker ();
140  checker->m_type = name;
141  checker->m_underlying = underlying;
142  return Ptr<AttributeChecker> (checker, false);
143 }
144 
145 }
146 
161 #define ATTRIBUTE_ACCESSOR_DEFINE(type) \
162  template <typename T1> \
163  Ptr<const AttributeAccessor> Make ## type ## Accessor (T1 a1) \
164  { \
165  return MakeAccessorHelper<type ## Value> (a1); \
166  } \
167  template <typename T1, typename T2> \
168  Ptr<const AttributeAccessor> Make ## type ## Accessor (T1 a1, T2 a2) \
169  { \
170  return MakeAccessorHelper<type ## Value> (a1, a2); \
171  }
172 
190 #define ATTRIBUTE_VALUE_DEFINE_WITH_NAME(type,name) \
191  class name ## Value : public AttributeValue \
192  { \
193  public: \
194  name ## Value (); \
195  name ## Value (const type &value); \
196  void Set (const type &value); \
197  type Get (void) const; \
198  template <typename T> \
199  bool GetAccessor (T & value) const { \
200  value = T (m_value); \
201  return true; \
202  } \
203  virtual Ptr<AttributeValue> Copy (void) const; \
204  virtual std::string \
205  SerializeToString (Ptr<const AttributeChecker> checker) const; \
206  virtual bool \
207  DeserializeFromString (std::string value, \
208  Ptr<const AttributeChecker> checker); \
209  private: \
210  type m_value; \
211  }
212 
213 
225 #define ATTRIBUTE_VALUE_DEFINE(name) \
226  ATTRIBUTE_VALUE_DEFINE_WITH_NAME (name,name)
227 
228 
244 #define ATTRIBUTE_CONVERTER_DEFINE(type)
245 
262 #define ATTRIBUTE_CHECKER_DEFINE(type) \
263  class type ## Checker : public AttributeChecker {}; \
264  Ptr<const AttributeChecker> Make ## type ## Checker (void)
265 
266 
283 #define ATTRIBUTE_VALUE_IMPLEMENT_WITH_NAME(type,name) \
284  name ## Value::name ## Value () \
285  : m_value () {} \
286  name ## Value::name ## Value (const type &value) \
287  : m_value (value) {} \
288  void name ## Value::Set (const type &v) { \
289  m_value = v; \
290  } \
291  type name ## Value::Get (void) const { \
292  return m_value; \
293  } \
294  Ptr<AttributeValue> \
295  name ## Value::Copy (void) const { \
296  return ns3::Create<name ## Value> (*this); \
297  } \
298  std::string name ## Value::SerializeToString \
299  (Ptr<const AttributeChecker> checker) const { \
300  std::ostringstream oss; \
301  oss << m_value; \
302  return oss.str (); \
303  } \
304  bool name ## Value::DeserializeFromString \
305  (std::string value, Ptr<const AttributeChecker> checker) { \
306  std::istringstream iss; \
307  iss.str (value); \
308  iss >> m_value; \
309  NS_ABORT_MSG_UNLESS (iss.eof (), \
310  "Attribute value " << "\"" << value << "\"" << \
311  " is not properly formatted"); \
312  return !iss.bad () && !iss.fail (); \
313  }
314 
329 #define ATTRIBUTE_VALUE_IMPLEMENT(type) \
330  ATTRIBUTE_VALUE_IMPLEMENT_WITH_NAME (type,type)
331 
332 
344 #define ATTRIBUTE_CHECKER_IMPLEMENT(type) \
345  Ptr<const AttributeChecker> Make ## type ## Checker (void) { \
346  return MakeSimpleAttributeChecker<type ## Value,type ## Checker> \
347  (# type "Value", # type); \
348  } \
349 
350 
363 #define ATTRIBUTE_CHECKER_IMPLEMENT_WITH_NAME(type,name) \
364  Ptr<const AttributeChecker> Make ## type ## Checker (void) { \
365  return MakeSimpleAttributeChecker<type ## Value,type ## Checker> \
366  (# type "Value", name); \
367  } \
368 
369 
390 #define ATTRIBUTE_HELPER_HEADER(type) \
391  ATTRIBUTE_VALUE_DEFINE (type); \
392  ATTRIBUTE_ACCESSOR_DEFINE (type); \
393  ATTRIBUTE_CHECKER_DEFINE (type)
394 
412 #define ATTRIBUTE_HELPER_CPP(type) \
413  ATTRIBUTE_CHECKER_IMPLEMENT (type); \
414  ATTRIBUTE_VALUE_IMPLEMENT (type)
415 
416 
417 #endif /* ATTRIBUTE_HELPER_H */
Ptr< T > Create(Ts &&... args)
Create class instances by constructors with varying numbers of arguments and return them by Ptr...
Definition: ptr.h:405
Smart pointer class similar to boost::intrusive_ptr.
Definition: ptr.h:73
Hold a value for an Attribute.
Definition: attribute.h:68
ns3::AttributeValue, ns3::AttributeAccessor and ns3::AttributeChecker declarations.
Every class exported by the ns3 library is enclosed in the ns3 namespace.
Ptr< AttributeChecker > MakeSimpleAttributeChecker(std::string name, std::string underlying)
A simple string-based attribute checker.
ns3::MakeAccessorHelper declarations and template implementations.
Ptr< T > Copy(Ptr< T > object)
Return a deep copy of a Ptr.
Definition: ptr.h:536
NS_ABORT_x macro definitions.