src/core/command-line.h
author Raj Bhattacharjea <raj.b@gatech.edu>
Wed, 02 May 2007 15:23:35 -0400
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child 538 3cc417842b5f
permissions -rw-r--r--
Added default value sample
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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#ifndef COMMAND_LINE_H
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#define COMMAND_LINE_H
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#include <list>
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#include <string>
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#include "default-value.h"
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namespace ns3 {
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class CommandLine
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{
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public:
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  template <typename T>
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  static void AddArgValue (const std::string &name,
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			   const std::string &help, 
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			   T &value);
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  static void AddArgCommand (const std::string &name,
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			     const std::string &help,
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			     Callback<void> cb);
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  static void Parse (int argc, char *argv[]);
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 private:
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  template <typename T>
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  class UserDefaultValue : public DefaultValueBase 
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  {
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  public:
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    UserDefaultValue (const std::string &name,
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                      const std::string &help,
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		      T &value);
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  private:
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    virtual bool DoParseValue (const std::string &value);
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    virtual std::string DoGetType (void) const;
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    virtual std::string DoGetDefaultValue (void) const;
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    T *m_valuePtr;
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  };
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  static void PrintHelp (void);
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  typedef std::list<DefaultValueBase *> List;
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  static List *GetUserList (void);
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  static CommandDefaultValue g_help;
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};
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}//namespace ns3
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namespace ns3 {
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template <typename T>
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void 
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CommandLine::AddArgValue (const std::string &name,
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			  const std::string &help, 
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			  T &value)
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{
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  DefaultValueBase *base = 
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    new UserDefaultValue<T> (name, help, value);
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  GetUserList ()->push_back (base);
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}
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template <typename T>
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CommandLine::UserDefaultValue<T>::UserDefaultValue (const std::string &name,
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						    const std::string &help,
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						    T &value)
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  : DefaultValueBase (name, help),
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    m_valuePtr (&value)
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{
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  // we do not register in the DefaultValueList class on purpose.
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}
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template <typename T>
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bool
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CommandLine::UserDefaultValue<T>::DoParseValue (const std::string &value)
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{
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  std::istringstream iss;
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  iss.str (value);
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  T v;
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  iss >> v;
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  *m_valuePtr = v;
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  return !iss.bad () && !iss.fail ();
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}
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template <typename T>
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std::string
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CommandLine::UserDefaultValue<T>::DoGetType (void) const
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{
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  return "";
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}
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template <typename T>
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std::string
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CommandLine::UserDefaultValue<T>::DoGetDefaultValue (void) const
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{
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  return "";
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}
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}//namespace ns3
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#endif /* COMMAND_LINE_H */