Line data    Source code

       1             : // -*- mode: c++ -*-
       2             : //# Copyright (C) 1996,1997,1998,1999,2000,2002,2003,2015
       3             : //# Associated Universities, Inc. Washington DC, USA.
       4             : //#
       5             : //# This library is free software; you can redistribute it and/or modify it
       6             : //# under the terms of the GNU Library General Public License as published by
       7             : //# the Free Software Foundation; either version 2 of the License, or (at your
       8             : //# option) any later version.
       9             : //#
      10             : //# This library is distributed in the hope that it will be useful, but WITHOUT
      11             : //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
      12             : //# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
      13             : //# License for more details.
      14             : //#
      15             : //# You should have received a copy of the GNU Library General Public License
      16             : //# along with this library; if not, write to the Free Software Foundation,
      17             : //# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
      18             : //#
      19             : //# Correspondence concerning AIPS++ should be addressed as follows:
      20             : //#        Internet email: casa-feedback@nrao.edu.
      21             : //#        Postal address: AIPS++ Project Office
      22             : //#                        National Radio Astronomy Observatory
      23             : //#                        520 Edgemont Road
      24             : //#                        Charlottesville, VA 22903-2475 USA
      25             : //#
      26             : //
      27             : // casacore::Data provider weights iterators, based on sigma column
      28             : //
      29             : #ifndef MSVIS_STATISTICS_VI2_STATS_SIGMAS_ITERATOR_H_
      30             : #define MSVIS_STATISTICS_VI2_STATS_SIGMAS_ITERATOR_H_
      31             : 
      32             : #include <casacore/casa/aips.h>
      33             : #include <msvis/MSVis/VisibilityIterator2.h>
      34             : #include <msvis/MSVis/VisBuffer2.h>
      35             : #include <iterator>
      36             : 
      37             : namespace casa {
      38             : 
      39             : // Vi2StatsSigmasIterator has the form of a CRTP base class to promote
      40             : // efficiency in iterator operations.  The weights provided by these iterators
      41             : // are converted from sigmas according to 1/(sigma^2) (except for sigma == 0).
      42             : //
      43             : template<class T>
      44             : class Vi2StatsSigmasIterator
      45             :         : public std::iterator<std::input_iterator_tag,casacore::Float> {
      46             : 
      47             : public:
      48             :         Vi2StatsSigmasIterator& operator++();
      49             : 
      50             :         Vi2StatsSigmasIterator operator++(int);
      51             : 
      52             :         bool operator==(const Vi2StatsSigmasIterator& rhs);
      53             : 
      54             :         bool operator!=(const Vi2StatsSigmasIterator& rhs);
      55             : 
      56             :         casacore::Float operator*();
      57             : 
      58             :         bool atEnd();
      59             : 
      60             : protected:
      61           0 :         Vi2StatsSigmasIterator(vi::VisBuffer2 *vb2)
      62           0 :                 : vb2(vb2) {};
      63             : 
      64     3080976 :         Vi2StatsSigmasIterator() {};
      65             : 
      66             :         vi::VisBuffer2 *vb2;
      67             : };
      68             : 
      69             : // Weights iterator over sigma cube.
      70             : class Vi2StatsSigmasCubeIterator final
      71             :         : public Vi2StatsSigmasIterator<Vi2StatsSigmasCubeIterator> {
      72             : 
      73             : public:
      74             :         Vi2StatsSigmasCubeIterator(vi::VisBuffer2 *vb2);
      75             : 
      76             :         Vi2StatsSigmasCubeIterator();
      77             : 
      78             :         Vi2StatsSigmasCubeIterator& operator++();
      79             : 
      80             :         Vi2StatsSigmasCubeIterator operator++(int);
      81             : 
      82             :         bool operator==(const Vi2StatsSigmasCubeIterator& rhs);
      83             : 
      84             :         bool operator!=(const Vi2StatsSigmasCubeIterator& rhs);
      85             : 
      86             :         casacore::Float operator*();
      87             : 
      88             :         bool atEnd();
      89             : 
      90             : protected:
      91             :         casacore::uInt correlation;
      92             :         casacore::uInt nCorrelations;
      93             :         casacore::uInt channel;
      94             :         casacore::uInt nChannels;
      95             :         casacore::rownr_t row;
      96             :         casacore::rownr_t nRows;
      97             : };
      98             : 
      99             : // Weights iterator over row sigmas.
     100             : class Vi2StatsSigmasRowIterator final
     101             :         : public Vi2StatsSigmasIterator<Vi2StatsSigmasRowIterator> {
     102             : 
     103             : public:
     104             :         Vi2StatsSigmasRowIterator(vi::VisBuffer2 *vb2);
     105             : 
     106             :         Vi2StatsSigmasRowIterator();
     107             : 
     108             :         Vi2StatsSigmasRowIterator& operator++();
     109             : 
     110             :         Vi2StatsSigmasRowIterator operator++(int);
     111             : 
     112             :         bool operator==(const Vi2StatsSigmasRowIterator& rhs);
     113             : 
     114             :         bool operator!=(const Vi2StatsSigmasRowIterator& rhs);
     115             : 
     116             :         casacore::Float operator*();
     117             : 
     118             :         bool atEnd();
     119             : 
     120             : protected:
     121             :         casacore::rownr_t row;
     122             :         casacore::rownr_t nRows;
     123             : };
     124             : 
     125             : } // namespace casa
     126             : 
     127             : #endif // MSVIS_STATISTICS_VI2_STATS_SIGMAS_ITERATOR_H_