Arch.cc

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#include <iostream>
#include <list>
#include <inttypes.h>

#include "zypp/base/Logger.h"
#include "zypp/base/Exception.h"
#include "zypp/base/NonCopyable.h"
#include "zypp/base/Tr1hash.h"
#include "zypp/Arch.h"
#include "zypp/Bit.h"

using std::endl;

namespace zypp
{ 

  //
  //    CLASS NAME : Arch::CompatEntry
  //
  struct Arch::CompatEntry
  {
    typedef bit::BitField<uint64_t> CompatBits;

    CompatEntry( const std::string & archStr_r,
                 CompatBits::IntT idBit_r = 1 )
    : _idStr( archStr_r )
    , _archStr( archStr_r )
    , _idBit( idBit_r )
    , _compatBits( idBit_r )
    , _compatScore( idBit_r ? 1 : 0 ) // number of compatible archs
    {}

    CompatEntry( IdString archStr_r,
                 CompatBits::IntT idBit_r = 1 )
    : _idStr( archStr_r )
    , _archStr( archStr_r.asString() )
    , _idBit( idBit_r )
    , _compatBits( idBit_r )
    , _compatScore( idBit_r ? 1 : 0 ) // number of compatible archs
    {}

    void addCompatBit( const CompatBits & idBit_r ) const
    {
      if ( idBit_r && ! (_compatBits & idBit_r) )
        {
          _compatBits |= idBit_r;
          ++_compatScore;
        }
    }

    bool compatibleWith( const CompatEntry & targetEntry_r ) const
    {
      switch ( _idBit.value() )
        {
        case 0:
          // this is noarch and always comatible
          return true;
          break;
        case 1:
          // this is a non builtin: self compatible only
          return _archStr == targetEntry_r._archStr;
          break;
        }
      // This is a builtin: compatible if mentioned in targetEntry_r
      return targetEntry_r._compatBits & _idBit;
    }

    int compare( const CompatEntry & rhs ) const
    {
      if ( _compatScore != rhs._compatScore )
        return( _compatScore < rhs._compatScore ? -1 : 1 );
      return _archStr.compare( rhs._archStr );
    }

    bool isBuiltIn() const
    { return( _idBit != CompatBits(1) ); }

    IdString::IdType id() const
    { return _idStr.id(); }

    IdString            _idStr;
    std::string         _archStr; // frequently used by the UI so we keep a reference
    CompatBits          _idBit;
    mutable CompatBits  _compatBits;
    mutable unsigned    _compatScore;
  };

  inline std::ostream & operator<<( std::ostream & str, const Arch::CompatEntry & obj )
  {
    Arch::CompatEntry::CompatBits bit( obj._idBit );
    unsigned bitnum = 0;
    while ( bit )
    {
      ++bitnum;
      bit >>= 1;
    }
    return str << str::form( "%-15s ", obj._archStr.c_str() ) << str::numstring(bitnum,2) << ' '
               << obj._compatBits << ' ' << obj._compatScore;
  }

  inline bool operator==( const Arch::CompatEntry & lhs, const Arch::CompatEntry & rhs )
  { return lhs._idStr == rhs._idStr; }
  inline bool operator!=( const Arch::CompatEntry & lhs, const Arch::CompatEntry & rhs )
  { return ! ( lhs == rhs ); }

} // namespace zypp

ZYPP_DEFINE_ID_HASHABLE( zypp::Arch::CompatEntry );

namespace zypp
{ 

  namespace
  { 

    // Builtin architecture STRING VALUES to be
    // used in defCompatibleWith below!
    //
    // const IdString  _foo( "foo" );
    //
    // NOTE: Builtin CLASS Arch CONSTANTS are defined below.
    //       You have to change them accordingly.
    //
    // NOTE: Thake care CompatBits::IntT is able to provide one
    //       bit for each architectue.
    //
#define DEF_BUILTIN(A) const IdString  _##A( #A );
    DEF_BUILTIN( noarch );

    DEF_BUILTIN( i386 );
    DEF_BUILTIN( i486 );
    DEF_BUILTIN( i586 );
    DEF_BUILTIN( i686 );
    DEF_BUILTIN( athlon );
    DEF_BUILTIN( x86_64 );

    DEF_BUILTIN( pentium3 );
    DEF_BUILTIN( pentium4 );

    DEF_BUILTIN( s390 );
    DEF_BUILTIN( s390x );

    DEF_BUILTIN( ppc );
    DEF_BUILTIN( ppc64 );

    DEF_BUILTIN( ia64 );

    DEF_BUILTIN( alphaev67 );
    DEF_BUILTIN( alphaev6 );
    DEF_BUILTIN( alphapca56 );
    DEF_BUILTIN( alphaev56 );
    DEF_BUILTIN( alphaev5 );
    DEF_BUILTIN( alpha );

    DEF_BUILTIN( sparc64v );
    DEF_BUILTIN( sparcv9v );
    DEF_BUILTIN( sparc64 );
    DEF_BUILTIN( sparcv9 );
    DEF_BUILTIN( sparcv8 );
    DEF_BUILTIN( sparc );

    DEF_BUILTIN( armv7l );
    DEF_BUILTIN( armv6l );
    DEF_BUILTIN( armv5tejl );
    DEF_BUILTIN( armv5tel );
    DEF_BUILTIN( armv5l );
    DEF_BUILTIN( armv4tl );
    DEF_BUILTIN( armv4l );
    DEF_BUILTIN( armv3l );

    DEF_BUILTIN( sh3 );

    DEF_BUILTIN( sh4 );
    DEF_BUILTIN( sh4a );
#undef DEF_BUILTIN

    //
    //  CLASS NAME : CompatSet
    //
    struct ArchCompatSet : private base::NonCopyable
    {
      typedef Arch::CompatEntry       CompatEntry;
      typedef CompatEntry::CompatBits CompatBits;

      typedef std::tr1::unordered_set<CompatEntry> Set;
      typedef Set::iterator           iterator;
      typedef Set::const_iterator     const_iterator;

      static ArchCompatSet & instance()
      {
        static ArchCompatSet _instance;
        return _instance;
      }

      const Arch::CompatEntry & assertDef( const std::string & archStr_r )
      { return *_compatSet.insert( Arch::CompatEntry( archStr_r ) ).first; }
      const Arch::CompatEntry & assertDef( IdString archStr_r )
      { return *_compatSet.insert( Arch::CompatEntry( archStr_r ) ).first; }

      const_iterator begin() const
      { return _compatSet.begin(); }

      const_iterator end() const
      { return _compatSet.end(); }

      struct DumpOnCompare
      {
        int operator()( const CompatEntry & lhs,  const CompatEntry & rhs ) const
        { return lhs._idBit.value() < rhs._idBit.value(); }
      };

      std::ostream & dumpOn( std::ostream & str ) const
      {
        str << "ArchCompatSet:";
        std::list<CompatEntry> ov( _compatSet.begin(), _compatSet.end() );
        ov.sort( DumpOnCompare() );
        for_( it, ov.begin(), ov.end() )
          {
            str << endl << ' ' << *it;
          }
        return str;
      }

    private:
      ArchCompatSet()
      {
        // _noarch must have _idBit 0.
        // Other builtins have 1-bit set
        // and are initialized done on the fly.
        _compatSet.insert( Arch::CompatEntry( _noarch, 0 ) );
        // Define the CompatibleWith relation:
        //
        defCompatibleWith( _i386,       _noarch );
        defCompatibleWith( _i486,       _noarch,_i386 );
        defCompatibleWith( _i586,       _noarch,_i386,_i486 );
        defCompatibleWith( _i686,       _noarch,_i386,_i486,_i586 );
        defCompatibleWith( _athlon,     _noarch,_i386,_i486,_i586,_i686 );
        defCompatibleWith( _x86_64,     _noarch,_i386,_i486,_i586,_i686,_athlon );

        defCompatibleWith( _pentium3,   _noarch,_i386,_i486,_i586,_i686 );
        defCompatibleWith( _pentium4,   _noarch,_i386,_i486,_i586,_i686,_pentium3 );

        defCompatibleWith( _ia64,       _noarch,_i386,_i486,_i586,_i686 );
        //
        defCompatibleWith( _s390,       _noarch );
        defCompatibleWith( _s390x,      _noarch,_s390 );
        //
        defCompatibleWith( _ppc,        _noarch );
        defCompatibleWith( _ppc64,      _noarch,_ppc );
        //
        defCompatibleWith( _alpha,      _noarch );
        defCompatibleWith( _alphaev5,   _noarch,_alpha );
        defCompatibleWith( _alphaev56,  _noarch,_alpha,_alphaev5 );
        defCompatibleWith( _alphapca56, _noarch,_alpha,_alphaev5,_alphaev56 );
        defCompatibleWith( _alphaev6,   _noarch,_alpha,_alphaev5,_alphaev56,_alphapca56 );
        defCompatibleWith( _alphaev67,  _noarch,_alpha,_alphaev5,_alphaev56,_alphapca56,_alphaev6 );
        //
        defCompatibleWith( _sparc,      _noarch );
        defCompatibleWith( _sparcv8,    _noarch,_sparc );
        defCompatibleWith( _sparcv9,    _noarch,_sparc,_sparcv8 );
        defCompatibleWith( _sparc64,    _noarch,_sparc,_sparcv8,_sparcv9 );
        //
        defCompatibleWith( _sparcv9v,   _noarch,_sparc,_sparcv8,_sparcv9 );
        defCompatibleWith( _sparc64v,   _noarch,_sparc,_sparcv8,_sparcv9,_sparcv9v,_sparc64 );
        //
        defCompatibleWith( _armv3l,     _noarch );
        defCompatibleWith( _armv4l,     _noarch,_armv3l );
        defCompatibleWith( _armv4tl,    _noarch,_armv3l,_armv4l );
        defCompatibleWith( _armv5l,     _noarch,_armv3l,_armv4l,_armv4tl );
        defCompatibleWith( _armv5tel,   _noarch,_armv3l,_armv4l,_armv4tl,_armv5l );
        defCompatibleWith( _armv5tejl,  _noarch,_armv3l,_armv4l,_armv4tl,_armv5l,_armv5tel );
        defCompatibleWith( _armv6l,     _noarch,_armv3l,_armv4l,_armv4tl,_armv5l,_armv5tel,_armv5tejl );
        defCompatibleWith( _armv7l,     _noarch,_armv3l,_armv4l,_armv4tl,_armv5l,_armv5tel,_armv5tejl,_armv6l );
        //
        defCompatibleWith( _sh3,        _noarch );
        //
        defCompatibleWith( _sh4,        _noarch );
        defCompatibleWith( _sh4a,       _noarch,_sh4 );
        //
        // dumpOn( USR ) << endl;
      }

    private:
      CompatBits::IntT nextIdBit() const
      {
        if ( CompatBits::size == _compatSet.size() )
        {
          // Provide more bits in CompatBits::IntT
          INT << "Need more than " << CompatBits::size << " bits to encode architectures." << endl;
          ZYPP_THROW( Exception("Need more bits to encode architectures.") );
        }
        CompatBits::IntT nextBit = CompatBits::IntT(1) << (_compatSet.size());
        return nextBit;
      }

      const CompatEntry & assertCompatSetEntry( IdString archStr_r )
      { return *_compatSet.insert( Arch::CompatEntry( archStr_r, nextIdBit() ) ).first; }

      void defCompatibleWith( IdString targetArch_r,
                              IdString arch0_r,
                              IdString arch1_r = IdString(),
                              IdString arch2_r = IdString(),
                              IdString arch3_r = IdString(),
                              IdString arch4_r = IdString(),
                              IdString arch5_r = IdString(),
                              IdString arch6_r = IdString(),
                              IdString arch7_r = IdString(),
                              IdString arch8_r = IdString(),
                              IdString arch9_r = IdString() )
      {
        const CompatEntry & target( assertCompatSetEntry( targetArch_r ) );
        target.addCompatBit( assertCompatSetEntry( arch0_r )._idBit );
#define _SETARG(N) if ( arch##N##_r.empty() ) return; target.addCompatBit( assertCompatSetEntry( arch##N##_r )._idBit )
        _SETARG(1); _SETARG(2); _SETARG(3); _SETARG(4);
        _SETARG(5); _SETARG(6); _SETARG(7); _SETARG(8); _SETARG(9);
#undef _SETARG
      }

    private:
      Set _compatSet;
    };

  } // namespace

  //
  //    CLASS NAME : Arch
  //

  const Arch Arch_empty ( IdString::Empty );
  const Arch Arch_noarch( _noarch );

  const Arch Arch_i386( _i386 );
  const Arch Arch_i486( _i486 );
  const Arch Arch_i586( _i586 );
  const Arch Arch_i686( _i686 );
  const Arch Arch_athlon( _athlon );
  const Arch Arch_x86_64( _x86_64 );

  const Arch Arch_pentium3( _pentium3 );
  const Arch Arch_pentium4( _pentium4 );

  const Arch Arch_s390( _s390 );
  const Arch Arch_s390x( _s390x );

  const Arch Arch_ppc( _ppc );
  const Arch Arch_ppc64( _ppc64 );

  const Arch Arch_ia64( _ia64 );

  const Arch Arch_alphaev67( _alphaev67 );
  const Arch Arch_alphaev6( _alphaev6 );
  const Arch Arch_alphapca56( _alphapca56 );
  const Arch Arch_alphaev56( _alphaev56 );
  const Arch Arch_alphaev5( _alphaev5 );
  const Arch Arch_alpha( _alpha );

  const Arch Arch_sparc64v( _sparc64v );
  const Arch Arch_sparcv9v( _sparcv9v );
  const Arch Arch_sparc64( _sparc64 );
  const Arch Arch_sparcv9( _sparcv9 );
  const Arch Arch_sparcv8( _sparcv8 );
  const Arch Arch_sparc( _sparc );

  const Arch Arch_armv7l( _armv7l );
  const Arch Arch_armv6l( _armv6l );
  const Arch Arch_armv5tejl( _armv5tejl );
  const Arch Arch_armv5tel( _armv5tel );
  const Arch Arch_armv5l( _armv5l );
  const Arch Arch_armv4tl( _armv4tl );
  const Arch Arch_armv4l( _armv4l );
  const Arch Arch_armv3l( _armv3l );

  const Arch Arch_sh3( _sh3 );

  const Arch Arch_sh4( _sh4 );
  const Arch Arch_sh4a( _sh4a );

  //
  //    METHOD NAME : Arch::Arch
  //    METHOD TYPE : Ctor
  //
  Arch::Arch()
  : _entry( &ArchCompatSet::instance().assertDef( _noarch ) )
  {}

  Arch::Arch( IdString::IdType id_r )
  : _entry( &ArchCompatSet::instance().assertDef( IdString(id_r) ) )
  {}

  Arch::Arch( const IdString & idstr_r )
  : _entry( &ArchCompatSet::instance().assertDef( idstr_r ) )
  {}

  Arch::Arch( const std::string & str_r )
  : _entry( &ArchCompatSet::instance().assertDef( str_r ) )
  {}

  Arch::Arch( const char * cstr_r )
  : _entry( &ArchCompatSet::instance().assertDef( cstr_r ) )
  {}

  Arch::Arch( const CompatEntry & rhs )
  : _entry( &rhs )
  {}

  //
  //    METHOD NAME : Arch::idStr
  //    METHOD TYPE : IdString
  //
  IdString Arch::idStr() const
  { return _entry->_idStr; }

  //
  //    METHOD NAME : Arch::asString
  //    METHOD TYPE : const std::string &
  //
  const std::string & Arch::asString() const
  { return _entry->_archStr; }

  //
  //    METHOD NAME : Arch::isBuiltIn
  //    METHOD TYPE : bool
  //
  bool Arch::isBuiltIn() const
  { return _entry->isBuiltIn(); }

  //
  //    METHOD NAME : Arch::compatibleWith
  //    METHOD TYPE : bool
  //
  bool Arch::compatibleWith( const Arch & targetArch_r ) const
  { return _entry->compatibleWith( *targetArch_r._entry ); }

  //
  //    METHOD NAME : Arch::compare
  //    METHOD TYPE : bool
  //
  int Arch::compare( const Arch & rhs ) const
  { return _entry->compare( *rhs._entry ); }

  //
  //    METHOD NAME : Arch::compatSet
  //    METHOD TYPE : Arch::CompatSet
  //
  Arch::CompatSet Arch::compatSet( const Arch & targetArch_r )
  {
    Arch::CompatSet ret;

    for ( ArchCompatSet::const_iterator it = ArchCompatSet::instance().begin();
          it != ArchCompatSet::instance().end(); ++it )
      {
        if ( it->compatibleWith( *targetArch_r._entry ) )
          {
            ret.insert( Arch(*it) );
          }
      }

    return ret;
  }

} // namespace zypp