DwmIpv4Address.hh

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//===========================================================================
// @(#) $DwmPath: dwm/libDwm/tags/libDwm-0.6.0/include/DwmIpv4Address.hh 8939 $
// @(#) $Id: DwmIpv4Address.hh 8939 2017-03-31 04:02:30Z dwm $
//===========================================================================
//  Copyright (c) Daniel W. McRobb 2004-2006, 2016
//  All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions
//  are met:
//
//  1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//  2. 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. The names of the authors and copyright holders may not be used to
//    endorse or promote products derived from this software without
//    specific prior written permission.
//
//  IN NO EVENT SHALL DANIEL W. MCROBB BE LIABLE TO ANY PARTY FOR
//  DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
//  INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE,
//  EVEN IF DANIEL W. MCROBB HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
//  DAMAGE.
//
//  THE SOFTWARE PROVIDED HEREIN IS ON AN "AS IS" BASIS, AND
//  DANIEL W. MCROBB HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT,
//  UPDATES, ENHANCEMENTS, OR MODIFICATIONS. DANIEL W. MCROBB MAKES NO
//  REPRESENTATIONS AND EXTENDS NO WARRANTIES OF ANY KIND, EITHER 
//  IMPLIED OR EXPRESS, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
//  WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
//  PURPOSE, OR THAT THE USE OF THIS SOFTWARE WILL NOT INFRINGE ANY 
//  PATENT, TRADEMARK OR OTHER RIGHTS.
//===========================================================================

//---------------------------------------------------------------------------
//---------------------------------------------------------------------------

#ifndef _DWMIPV4ADDRESS_HH_
#define _DWMIPV4ADDRESS_HH_

extern "C" {
  #include <inttypes.h>
  #include <sys/types.h>
  #include <netinet/in.h>
}

#include <string>

#include "DwmIpAddress.hh"

typedef uint32_t  ipv4addr_t;

namespace Dwm {

  //--------------------------------------------------------------------------
  //--------------------------------------------------------------------------
  class Ipv4Address
    : public IpAddress
  {
  public:
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    Ipv4Address();

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline Ipv4Address(ipv4addr_t addr)
        : _addr(addr)
    {}

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    Ipv4Address(const std::string & dottedAddr);

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline ipv4addr_t Raw() const
    {
      return(_addr);
    }
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    operator std::string () const;
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline bool IsV6() const
    {
      return(false);
    }
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline bool operator < (const Ipv4Address & addr) const
    {
      return(ntohl(_addr) < ntohl(addr._addr));
    }

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline bool operator > (const Ipv4Address & addr) const
    {
      return(ntohl(_addr) > ntohl(addr._addr));
    }

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline bool operator >= (const Ipv4Address & addr) const
    {
      return((ntohl(_addr) > ntohl(addr._addr))
             || (_addr == addr._addr));
    }
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline bool operator <= (const Ipv4Address & addr) const
    {
      return((ntohl(_addr) < ntohl(addr._addr))
             || (_addr == addr._addr));
    }

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline bool operator == (const Ipv4Address & addr) const
    {
      return(_addr == addr._addr);
    }

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline bool operator != (const Ipv4Address & addr) const
    {
      return(_addr != addr._addr);
    }
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline Ipv4Address & operator &= (const Ipv4Address & mask)
    {
      _addr &= mask._addr;
      return(*this);
    }

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline Ipv4Address operator ++ (int)
    {
      Ipv4Address rc(*this);
      uint32_t  a = ntohl(_addr);
      if (a != 0xFFFFFFFF) {
        _addr = htonl(a + 1);
      }
      return rc;
    }

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline Ipv4Address & operator ++ ()
    {
      uint32_t  a = ntohl(_addr);
      if (a != 0xFFFFFFFF) {
        _addr = htonl(a + 1);
      }
      return *this;
    }

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline Ipv4Address operator -- (int)
    {
      Ipv4Address rc(*this);
      uint32_t  a = ntohl(_addr);
      if (a != 0) {
        _addr = htonl(a - 1);
      }
      return rc;
    }

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline Ipv4Address & operator -- ()
    {
      uint32_t  a = ntohl(_addr);
      if (a != 0) {
        _addr = htonl(a - 1);
      }
      return *this;
    }

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline Ipv4Address & operator -= (uint32_t i)
    {
      uint32_t  a = ntohl(_addr);
      if (a >= i) {
        _addr = htonl(a - i);
      }
      else {
        _addr = htonl(0);
      }
      return *this;
    }

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline Ipv4Address & operator += (uint32_t i)
    {
      uint32_t  a = ntohl(_addr);
      if ((uint32_t)(a + i) >= a) {
        _addr = htonl(a + i);
      }
      else {
        _addr = htonl(0xFFFFFFFF);
      }
      return *this;
    }
    
    inline bool BitIsSet(int8_t bit) const
    {
      return(((ntohl(_addr) >> bit) & 1) != 0);
    }

    inline int GetBit(int bit) const
    {
      // return (((const char *)(&_addr))[bit >> 3] >> (7 - (bit & 0x7))) & 0x1;
      // const uint8_t  *p = ((const uint8_t *)(&_addr)) + (bit >> 3);
      // return (*p >> (7 - (bit & 0x7))) & 0x1;
      
      return (ntohl(_addr) >> (31 - bit)) & 1;
      /*
      const uint8_t  *p = (const uint8_t *)(&_addr);
      return ((p[bit >> 3]) >> (7 - (bit & 0x7))) & 0x1;
      */
    }
    
    static inline uint8_t MaxKeyBits()
    {
      return(32);
    }
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    uint32_t StreamedLength() const;
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    std::istream & Read(std::istream & is);

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    std::ostream & Write(std::ostream & os) const;

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    ssize_t Read(int fd);
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    ssize_t Write(int fd) const;

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    size_t Read(FILE * f);
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    size_t Write(FILE * f) const;

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    int Read(gzFile gzf);
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    int Write(gzFile gzf) const;
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    int BZRead(BZFILE *bzf);
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    int BZWrite(BZFILE *bzf) const;
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    friend std::ostream & operator << (std::ostream & os, 
                                       const Ipv4Address & addr);

    friend Ipv4Address operator & (const Ipv4Address & addr,
                                   const Ipv4Address & mask);

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    uint32_t IpSum() const;
    
  protected:
    uint32_t  _addr;
  };

}  // namespace Dwm

#endif  // _DWMIPV4ADDRESS_HH_

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//-------------------------------------------------------------------------