Flags.h

Go to the documentation of this file.

//     ____   ______ __
//    / __ \ / ____// /
//   / /_/ // /    / /
//  / ____// /___ / /___   PixInsight Class Library
// /_/     \____//_____/   PCL 2.7.0
// ----------------------------------------------------------------------------
// pcl/Flags.h - Released 2024-06-18T15:48:54Z
// ----------------------------------------------------------------------------
// This file is part of the PixInsight Class Library (PCL).
// PCL is a multiplatform C++ framework for development of PixInsight modules.
//
// Copyright (c) 2003-2024 Pleiades Astrophoto S.L. All Rights Reserved.
//
// Redistribution and use in both source and binary forms, with or without
// modification, is permitted provided that the following conditions are met:
//
// 1. All redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//
// 2. All redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// 3. Neither the names "PixInsight" and "Pleiades Astrophoto", nor the names
//    of their contributors, may be used to endorse or promote products derived
//    from this software without specific prior written permission. For written
//    permission, please contact info@pixinsight.com.
//
// 4. All products derived from this software, in any form whatsoever, must
//    reproduce the following acknowledgment in the end-user documentation
//    and/or other materials provided with the product:
//
//    "This product is based on software from the PixInsight project, developed
//    by Pleiades Astrophoto and its contributors (https://pixinsight.com/)."
//
//    Alternatively, if that is where third-party acknowledgments normally
//    appear, this acknowledgment must be reproduced in the product itself.
//
// THIS SOFTWARE IS PROVIDED BY PLEIADES ASTROPHOTO AND ITS CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL PLEIADES ASTROPHOTO OR ITS
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, BUSINESS
// INTERRUPTION; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; AND LOSS OF USE,
// DATA OR PROFITS) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
// ----------------------------------------------------------------------------
 
#ifndef __PCL_Flags_h
#define __PCL_Flags_h
 
 
#include <pcl/Defs.h>
 
#ifdef __PCL_BUILDING_PIXINSIGHT_APPLICATION
namespace pi
{
class GlobalSettings;
}
#endif
 
namespace pcl
{
 
// ----------------------------------------------------------------------------
 
template <bool> struct FlagType {};
template <>     struct FlagType<true>  { using type = unsigned; };
template <>     struct FlagType<false> { using type = int; };
 
// ----------------------------------------------------------------------------
 
template <typename E>
class PCL_CLASS Flags
{
public:
 
   static_assert( sizeof( E ) <= sizeof( int ),
                  "Invalid sizeof( Flags::enum_type ): Must not be larger than sizeof( int )" );
 
   using enum_type = E;
 
   using flag_type = typename FlagType<std::is_unsigned<enum_type>::value>::type;
 
   Flags() = default;
 
   constexpr
   Flags( enum_type e )
      : m_flags( int( e ) )
   {
   }
 
   constexpr
   Flags( flag_type m )
      : m_flags( int( m ) )
   {
   }
 
   Flags( const Flags& ) = default;
 
   Flags& operator =( const Flags& ) = default;
 
   Flags& operator =( enum_type e )
   {
      m_flags = e;
      return *this;
   }
 
   Flags& operator &=( Flags f )
   {
      m_flags &= f.m_flags;
      return *this;
   }
 
   Flags& operator &=( enum_type e )
   {
      m_flags &= unsigned( e );
      return *this;
   }
 
   Flags& operator &=( unsigned m )
   {
      m_flags &= m;
      return *this;
   }
 
   Flags& operator |=( Flags f )
   {
      m_flags |= f.m_flags;
      return *this;
   }
 
   Flags& operator |=( enum_type e )
   {
      m_flags |= unsigned( e );
      return *this;
   }
 
   Flags& operator |=( unsigned m )
   {
      m_flags |= m;
      return *this;
   }
 
   Flags& operator ^=( Flags f )
   {
      m_flags ^= f.m_flags;
      return *this;
   }
 
   Flags& operator ^=( enum_type e )
   {
      m_flags ^= unsigned( e );
      return *this;
   }
 
   Flags& operator ^=( unsigned m )
   {
      m_flags ^= m;
      return *this;
   }
 
   constexpr bool IsFlagSet( enum_type e ) const
   {
      return (m_flags & e) != flag_type( 0 );
   }
 
   void SetFlag( enum_type e, bool on = true )
   {
      if ( on )
         m_flags |= e;
      else
         m_flags &= ~e;
   }
 
   void ClearFlag( enum_type e )
   {
      SetFlag( e, false );
   }
 
   void Clear()
   {
      m_flags = flag_type( 0 );
   }
 
   Flags& operator <<( enum_type e )
   {
      SetFlag( e );
      return *this;
   }
 
   constexpr bool operator !() const
   {
      return m_flags == flag_type( 0 );
   }
 
   constexpr operator flag_type() const
   {
      return m_flags;
   }
 
   constexpr flag_type AsInteger() const
   {
      return m_flags;
   }
 
   constexpr Flags operator ~() const
   {
      return Flags( enum_type( ~m_flags ) );
   }
 
   constexpr Flags operator &( Flags f ) const
   {
      return Flags( enum_type( m_flags & f.m_flags ) );
   }
 
   constexpr Flags operator &( enum_type e ) const
   {
      return Flags( enum_type( m_flags & flag_type( e ) ) );
   }
 
   constexpr Flags operator &( unsigned m ) const
   {
      return Flags( enum_type( m_flags & m ) );
   }
 
   constexpr Flags operator |( Flags f ) const
   {
      return Flags( enum_type( m_flags | f.m_flags ) );
   }
 
   constexpr Flags operator |( enum_type e ) const
   {
      return Flags( enum_type( m_flags | flag_type( e ) ) );
   }
 
   constexpr Flags operator |( unsigned m ) const
   {
      return Flags( enum_type( m_flags | m ) );
   }
 
   constexpr Flags operator ^( Flags f ) const
   {
      return Flags( enum_type( m_flags ^ f.m_flags ) );
   }
 
   constexpr Flags operator ^( enum_type e ) const
   {
      return Flags( enum_type( m_flags ^ flag_type( e ) ) );
   }
 
   constexpr Flags operator ^( unsigned m ) const
   {
      return Flags( enum_type( m_flags ^ m ) );
   }
 
private:
 
   flag_type m_flags = flag_type( 0 );
 
#ifndef __PCL_NO_FLAGS_SETTINGS_IO
   friend class Settings;
#endif
 
#ifndef __PCL_NO_FLAGS_FILE_IO
   friend class File;
#endif
 
#ifdef __PCL_BUILDING_PIXINSIGHT_APPLICATION
   friend class pi::GlobalSettings;
#endif
};
 
// ----------------------------------------------------------------------------
 
} // pcl
 
#endif   // __PCL_Flags_h
 
// ----------------------------------------------------------------------------
// EOF pcl/Flags.h - Released 2024-06-18T15:48:54Z