~drizzle-trunk/drizzle/development

1863.2.1 by Monty Taylor
Added a basic bounded_value type for use in variables system.
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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 *
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 *  Copyright (C) 2010 Monty Taylor
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 *
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 *  This program is free software; you can redistribute it and/or modify
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 *  it under the terms of the GNU General Public License as published by
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 *  the Free Software Foundation; version 2 of the License.
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 *
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 *  This program is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *  GNU General Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License
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 *  along with this program; if not, write to the Free Software
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
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2234 by Brian Aker
Mass removal of ifdef/endif in favor of pragma once.
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#pragma once
1863.2.1 by Monty Taylor
Added a basic bounded_value type for use in variables system.
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1964.1.4 by Monty Taylor
Use boost::exception data bundling instead of co-opting the exceptions
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#include <boost/exception/info.hpp>
1863.2.1 by Monty Taylor
Added a basic bounded_value type for use in variables system.
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#include <boost/program_options.hpp>
1863.1.8 by Monty Taylor
Use invalid_option_value exception directly. More version neutral.
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#include <boost/program_options/errors.hpp>
2371.1.1 by Brian Aker
Fedora fix/use fwd header for iostream.
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#include <iosfwd>
1976.2.1 by Monty Taylor
Updated PBMS.
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#include <netinet/in.h> /* for in_port_t */
1863.2.1 by Monty Taylor
Added a basic bounded_value type for use in variables system.
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namespace drizzled
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{
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1964.1.4 by Monty Taylor
Use boost::exception data bundling instead of co-opting the exceptions
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/* We have to make this mixin exception class because boost program_option
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  exceptions don't derive from f-ing boost::exception. FAIL
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*/
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class invalid_option_value :
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  public boost::exception,
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  public boost::program_options::invalid_option_value
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{
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public:
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  invalid_option_value(const std::string &option_value) :
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    boost::exception(),
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    boost::program_options::invalid_option_value(option_value)
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  {}
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};
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1863.1.10 by Monty Taylor
Predeclare friend operators for Sun Studio.
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template<class T> class constrained_value;
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template<class T>
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std::istream& operator>>(std::istream& is, constrained_value<T>& bound_val);
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template<class T>
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std::ostream& operator<<(std::ostream& os, const constrained_value<T>& v);
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1863.2.1 by Monty Taylor
Added a basic bounded_value type for use in variables system.
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template<class T>
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class constrained_value
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{
1863.1.7 by Monty Taylor
Add a constrained_value class which allows us to set compile-time
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  T m_val;
1897.4.17 by Monty Taylor
Reverted a debugging change that snuck in.
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protected:
1863.1.7 by Monty Taylor
Add a constrained_value class which allows us to set compile-time
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  virtual constrained_value<T>& set_value(const constrained_value<T>& rhs)= 0;
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  virtual constrained_value<T>& set_value(T rhs)= 0;
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1897.4.17 by Monty Taylor
Reverted a debugging change that snuck in.
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public:
1863.1.7 by Monty Taylor
Add a constrained_value class which allows us to set compile-time
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  explicit constrained_value<T>(T in_value= 0) :
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    m_val(in_value)
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  { }
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  virtual ~constrained_value<T>()
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  {}
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  operator T() const
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  {
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    return m_val;
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  }
1863.2.1 by Monty Taylor
Added a basic bounded_value type for use in variables system.
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  constrained_value<T>& operator=(const constrained_value<T>& rhs)
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  {
1863.1.7 by Monty Taylor
Add a constrained_value class which allows us to set compile-time
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    return set_value(rhs);
1863.2.1 by Monty Taylor
Added a basic bounded_value type for use in variables system.
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  }
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  constrained_value<T>& operator=(T rhs)
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  {
1863.1.7 by Monty Taylor
Add a constrained_value class which allows us to set compile-time
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    return set_value(rhs);
1863.2.1 by Monty Taylor
Added a basic bounded_value type for use in variables system.
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  }
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1964.2.3 by Monty Taylor
Remove need for casts out of constrained_value - use get() method as well -
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  T get() const
1863.2.1 by Monty Taylor
Added a basic bounded_value type for use in variables system.
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  {
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    return m_val;
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  }
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1863.1.7 by Monty Taylor
Add a constrained_value class which allows us to set compile-time
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  void setVal(T in_val)
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  {
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    m_val= in_val;
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  }
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1863.1.10 by Monty Taylor
Predeclare friend operators for Sun Studio.
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  friend std::istream&
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  operator>>(std::istream& is,
1863.2.1 by Monty Taylor
Added a basic bounded_value type for use in variables system.
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             constrained_value<T>& bound_val)
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  {
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    T inner_val;
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    is >> inner_val;
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    bound_val= inner_val;
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    return is;
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  }
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  friend
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  std::ostream& operator<<(std::ostream& os, const constrained_value<T>& v)
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  {
1964.2.3 by Monty Taylor
Remove need for casts out of constrained_value - use get() method as well -
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    os << v.get();
1863.2.1 by Monty Taylor
Added a basic bounded_value type for use in variables system.
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    return os;
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  }
1863.1.7 by Monty Taylor
Add a constrained_value class which allows us to set compile-time
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};
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1945.1.2 by Monty Taylor
Add better support in constrained_check for min/max support. Add string ref class.
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namespace
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{
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template<class T, T min_val>
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bool less_than_min(T val_to_check)
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{
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  return val_to_check < min_val;
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}
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template<>
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inline bool less_than_min<uint16_t, 0>(uint16_t)
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{
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  return false;
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}
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template<>
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inline bool less_than_min<uint32_t, 0>(uint32_t)
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{
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  return false;
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}
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template<>
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inline bool less_than_min<uint64_t, 0>(uint64_t)
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{
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  return false;
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}
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template<class T, T min_val>
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bool greater_than_max(T val_to_check)
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{
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  return val_to_check > min_val;
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}
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template<>
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inline bool greater_than_max<uint16_t, UINT16_MAX>(uint16_t)
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{
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  return false;
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}
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template<>
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inline bool greater_than_max<uint32_t, UINT32_MAX>(uint32_t)
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{
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  return false;
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}
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template<>
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inline bool greater_than_max<uint64_t, UINT64_MAX>(uint64_t)
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{
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  return false;
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}
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} 
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1964.1.4 by Monty Taylor
Use boost::exception data bundling instead of co-opting the exceptions
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typedef boost::error_info<struct tag_invalid_max,uint64_t> invalid_max_info;
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typedef boost::error_info<struct tag_invalid_min,int64_t> invalid_min_info;
2070.2.1 by Monty Taylor
First step in getting that anonymous union out of set_var.
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typedef boost::error_info<struct tag_invalid_min,std::string> invalid_value;
1964.1.4 by Monty Taylor
Use boost::exception data bundling instead of co-opting the exceptions
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1897.4.2 by Monty Taylor
Fixed default min/max values to use numeric_limits.
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template<class T,
1897.4.6 by Monty Taylor
Replace optional max/min args with mandatory args. There is just no way to
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  T MAXVAL,
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  T MINVAL, unsigned int ALIGN= 1>
1863.1.7 by Monty Taylor
Add a constrained_value class which allows us to set compile-time
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class constrained_check :
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  public constrained_value<T>
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{
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public:
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  constrained_check<T,MAXVAL,MINVAL,ALIGN>(T in_value= 0) :
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    constrained_value<T>(in_value)
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  { }
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1897.4.17 by Monty Taylor
Reverted a debugging change that snuck in.
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protected:
1863.1.7 by Monty Taylor
Add a constrained_value class which allows us to set compile-time
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  constrained_value<T>& set_value(const constrained_value<T>& rhs)
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  {
1964.2.3 by Monty Taylor
Remove need for casts out of constrained_value - use get() method as well -
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    return set_value(rhs.get());
1863.1.7 by Monty Taylor
Add a constrained_value class which allows us to set compile-time
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  }
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  constrained_value<T>& set_value(T rhs)
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  {
1964.1.2 by Monty Taylor
Fixed error message thrown when we try to set a variable to an incorrect
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    if (greater_than_max<T,MAXVAL>(rhs))
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    {
1975.1.4 by Monty Taylor
Fixed a couple of icc warnings.
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      boost::throw_exception(invalid_option_value(boost::lexical_cast<std::string>(rhs)) << invalid_max_info(static_cast<uint64_t>(MAXVAL)));
1964.1.2 by Monty Taylor
Fixed error message thrown when we try to set a variable to an incorrect
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    }
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    if (less_than_min<T,MINVAL>(rhs))
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    {
1975.1.4 by Monty Taylor
Fixed a couple of icc warnings.
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      boost::throw_exception(invalid_option_value(boost::lexical_cast<std::string>(rhs)) << invalid_min_info(static_cast<int64_t>(MINVAL)));
1863.1.7 by Monty Taylor
Add a constrained_value class which allows us to set compile-time
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    }
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    rhs-= rhs % ALIGN;
1891.2.1 by Monty Taylor
Fixed things to make things compile with clang
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    this->setVal(rhs);
1863.1.7 by Monty Taylor
Add a constrained_value class which allows us to set compile-time
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    return *this;
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  }
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};
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1964.2.7 by Monty Taylor
Refactored syslog module and changed it to use sys_var directly.
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typedef constrained_check<uint64_t, UINT64_MAX, 0> uint64_constraint;
1964.2.17 by Monty Taylor
Did logging_query. Fixed rabbitmq.
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typedef constrained_check<uint32_t, UINT32_MAX, 0> uint32_constraint;
1976.2.7 by Monty Taylor
four more variables
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typedef constrained_check<uint64_t, UINT64_MAX, 1> uint64_nonzero_constraint;
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typedef constrained_check<uint32_t, UINT32_MAX, 1> uint32_nonzero_constraint;
1976.2.1 by Monty Taylor
Updated PBMS.
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typedef drizzled::constrained_check<in_port_t, 65535, 0> port_constraint;
1964.2.7 by Monty Taylor
Refactored syslog module and changed it to use sys_var directly.
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1863.1.7 by Monty Taylor
Add a constrained_value class which allows us to set compile-time
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typedef constrained_check<uint32_t,65535,1> back_log_constraints;
1863.2.1 by Monty Taylor
Added a basic bounded_value type for use in variables system.
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} /* namespace drizzled */
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template<class T>
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void validate(boost::any& v,
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              const std::vector<std::string>& values,
1863.1.7 by Monty Taylor
Add a constrained_value class which allows us to set compile-time
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              drizzled::constrained_value<T> val, int)
1863.2.1 by Monty Taylor
Added a basic bounded_value type for use in variables system.
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{
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  boost::program_options::validators::check_first_occurrence(v);
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  const std::string& s= boost::program_options::validators::get_single_string(values);
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1863.1.7 by Monty Taylor
Add a constrained_value class which allows us to set compile-time
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  val= boost::lexical_cast<T>(s);
1863.2.1 by Monty Taylor
Added a basic bounded_value type for use in variables system.
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  v= boost::any(val);
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}
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1863.1.7 by Monty Taylor
Add a constrained_value class which allows us to set compile-time
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