DiskUsageCounter.h

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#ifndef ZYPP_DISKUSAGE_COUNTER_H
#define ZYPP_DISKUSAGE_COUNTER_H

#include <set>
#include <string>
#include <iosfwd>
#include <utility>

#include <zypp/ResPool.h>
#include <zypp/Bitmap.h>
#include <zypp-core/base/Flags.h>

namespace zypp
{ 

  class ZYPP_API DiskUsageCounter
  {

  public:
    struct MountPoint
    {
      friend std::ostream & operator<<( std::ostream & str, const MountPoint & obj );
      std::string dir;                  
      std::string fstype;               
      long long block_size;             
      long long total_size;             
      long long used_size;              
      mutable long long pkg_size;       
      // hint bits:
      bool readonly:1;                  
      bool growonly:1;                  


      enum Hint
      {
        NoHint          = 0,
        Hint_readonly   = (1<<0),       
        Hint_growonly   = (1<<1),       
      };
      ZYPP_DECLARE_FLAGS(HintFlags,Hint);

      MountPoint( std::string  d = "/",
                  std::string  f = std::string(),
                  long long bs = 0LL, long long total = 0LL, long long used = 0LL, long long pkg = 0LL,
                  HintFlags hints = NoHint )
        : dir(std::move(d)), fstype(std::move(f))
        , block_size(bs), total_size(total), used_size(used), pkg_size(pkg)
        , readonly(hints.testFlag(Hint_readonly))
        , growonly(hints.testFlag(Hint_growonly))
      {}
      MountPoint( const char * d,
                  const std::string & f = std::string(),
                  long long bs = 0LL, long long total = 0LL, long long used = 0LL, long long pkg = 0LL,
                  HintFlags hints = NoHint )
        : MountPoint( std::string(d?d:""), f, bs, total, used, pkg, hints )
      {}


      MountPoint( const std::string & d,
                  long long bs, long long total = 0LL, long long used = 0LL, long long pkg = 0LL,
                  HintFlags hints = NoHint )
        : MountPoint( d, std::string(), bs, total, used, pkg, hints )
      {}
      MountPoint( const char * d,
                  long long bs, long long total = 0LL, long long used = 0LL, long long pkg = 0LL,
                  HintFlags hints = NoHint )
        : MountPoint( std::string(d?d:""), bs, total, used, pkg, hints )
      {}


      MountPoint( const std::string & d, HintFlags hints )
        : MountPoint( d, std::string(), 0LL, 0LL, 0LL, 0LL, hints )
      {}
      MountPoint( const char * d, HintFlags hints )
        : MountPoint( std::string(d?d:""), hints )
      {}
      MountPoint( const std::string & d, Hint hint )
        : MountPoint( d, HintFlags(hint) )
      {}
      MountPoint( const char * d, Hint hint )
        : MountPoint( std::string(d?d:""), HintFlags(hint) )
      {}

      bool operator<( const MountPoint & rhs ) const
      { return dir < rhs.dir; }

      ByteCount blockSize() const
      { return ByteCount( block_size, ByteCount::B ); }

      ByteCount totalSize() const
      { return ByteCount( total_size, ByteCount::K ); }

      ByteCount usedSize() const
      { return ByteCount( used_size, ByteCount::K ); }

      ByteCount freeSize() const
      { return ByteCount( total_size-used_size, ByteCount::K ); }

      ByteCount usedAfterCommit() const
      { return ByteCount( pkg_size, ByteCount::K ); }

      ByteCount freeAfterCommit() const
      { return ByteCount( total_size-pkg_size, ByteCount::K ); }

      ByteCount commitDiff() const
      { return ByteCount( pkg_size-used_size, ByteCount::K ); }
    };

    using MountPointSet = std::set<MountPoint>;

    DiskUsageCounter()
    {}

    DiskUsageCounter( MountPointSet  mps_r )
    : _mps(std::move( mps_r ))
    {}

    void setMountPoints( const MountPointSet & mps_r )
    { _mps = mps_r; }

    const MountPointSet & getMountPoints() const
    { return _mps; }

    static MountPointSet detectMountPoints( const std::string & rootdir = "/" );

    static MountPointSet justRootPartition();


    MountPointSet disk_usage( const ResPool & pool ) const;

    MountPointSet disk_usage( sat::Solvable solv_r ) const;
    MountPointSet disk_usage( const PoolItem & pi_r  ) const
    { return disk_usage( sat::asSolvable()( pi_r ) ); }
    MountPointSet disk_usage( const ResObject::constPtr & obj_r ) const
    { return disk_usage( sat::asSolvable()( obj_r ) ); }

    MountPointSet disk_usage( const Bitmap & bitmap_r ) const;

    template<class Iterator>
    MountPointSet disk_usage( Iterator begin_r, Iterator end_r ) const
    {
      Bitmap bitmap( Bitmap::poolSize );
      for_( it, begin_r, end_r )
        bitmap.set( sat::asSolvable()( *it ).id() );
      return disk_usage( bitmap );
    }

  private:
    MountPointSet _mps;
  };

  ZYPP_DECLARE_OPERATORS_FOR_FLAGS(DiskUsageCounter::MountPoint::HintFlags);

  std::ostream & operator<<( std::ostream & str, const DiskUsageCounter::MountPoint & obj ) ZYPP_API;

  std::ostream & operator<<( std::ostream & str, const DiskUsageCounter::MountPointSet & obj ) ZYPP_API;

  inline std::ostream & operator<<( std::ostream & str, const DiskUsageCounter & obj )
  { return str << obj.getMountPoints(); }

} // namespace zypp
#endif // ZYPP_DISKUSAGE_COUNTER_H