/usr/include/casacore/tables/Tables/ConcatRows.h is in casacore-dev 2.2.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 | //# ConcatRows.h: Class holding the row numbers in a ConcatTable
//# Copyright (C) 2008
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library is distributed in the hope that it will be useful, but WITHOUT
//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
//# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: aips2-request@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
//#
//# $Id$
#ifndef TABLES_CONCATROWS_H
#define TABLES_CONCATROWS_H
//# Includes
#include <casacore/casa/aips.h>
#include <casacore/tables/Tables/RefRows.h>
#include <casacore/casa/Containers/Block.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
// <summary>
// Class holding the row numbers in a ConcatTable
// </summary>
// <use visibility=local>
// <reviewed reviewer="UNKNOWN" date="" tests="tConcatRows.cc">
// </reviewed>
// <prerequisite>
//# Classes you should understand before using this one.
// <li> <linkto class=Block>Block</linkto>
// </prerequisite>
// <synopsis>
// ConcatRows is used to hold the row numbers forming the concatenation
// of oher tables.
// table. It contains a vector which can hold the row numbers in 2 ways:
// <ol>
// <li> As a normal series of row numbers. This is used by e.g. class
// <linkto class=ConcatTable>ConcatTable</linkto>
// <li> As a series of Slices. In this case 3 subsequent entries
// in the vector are used to represent start, end, and increment.
// This is used by a function like <src>ScalarColumn::getColumnRange</src>.
// </ol>
// Class <linkto class=ConcatRowsIter>ConcatRowsIter</linkto> can be
// used to iterate through a ConcatRows object. Each step in the iteration
// goes to the next slice. If the ConcatRows object contains a simple series
// of row numbers, each slice contains only one row number.
// This can degrade performance, so it is possible to use shortcuts by
// testing if the object contains slices (using <src>isSliced()</src>)
// and getting the row number vector directly (using <src>rowVector()</src>).
// </synopsis>
// <motivation>
// ConcatRows is meant to have one class representing the various ways
// of picking row numbers. This simplifies the interface of the table
// and data manager classes dealing with getting/putting the data.
// </motivation>
//# <todo asof="$DATE:$">
//# A List of bugs, limitations, extensions or planned concatinements.
//# </todo>
class ConcatRows
{
public:
// Construct an empty block.
ConcatRows()
: itsRows (1,0),
itsNTable (0),
itsLastStRow (1),
itsLastEndRow (0)
{}
// Reserve the block for the given nr of tables.
void reserve (uInt ntable)
{ itsRows.resize (ntable+1); }
// Add a table with the given nr of rows.
void add (uInt nrow);
// Give the nr of tables.
uInt ntable() const
{ return itsNTable; }
// Get the total nr of rows.
uInt nrow() const
{ return itsRows[itsNTable]; }
// Give the nr of rows for the i-th table.
uInt operator[] (uInt i) const
{ return itsRows[i+1]; }
// Give the offset for the i-th table.
uInt offset (uInt i) const
{ return itsRows[i]; }
// Map an overall row number to a table and row number.
void mapRownr (uInt& tableNr, uInt& tabRownr, uInt rownr) const
{
if (rownr < itsLastStRow || rownr >= itsLastEndRow) {
findRownr (rownr);
}
tableNr = itsLastTableNr;
tabRownr = rownr - itsLastStRow;
}
private:
// Find the row number and fill in the lastXX_p values.
void findRownr (uInt rownr) const;
//# Data members.
Block<uInt> itsRows;
uInt itsNTable;
mutable uInt itsLastStRow; //# Cached variables to spped up
mutable uInt itsLastEndRow; //# function mapRownr().
mutable uInt itsLastTableNr;
};
// <summary>
// Class to iterate through a ConcatRows object.
// </summary>
// <use visibility=local>
// <reviewed reviewer="UNKNOWN" date="" tests="tConcatRows.cc">
// </reviewed>
// <prerequisite>
//# Classes you should understand before using this one.
// <li> <linkto class=ConcatRows>ConcatRows</linkto>
// </prerequisite>
// <synopsis>
// ConcatRowsSliceIter is useful to iterate through a
// <linkto class=ConcatRows>ConcatRows</linkto> object.
// It is possible to define for which row
// especially if the ConcatRows object contains slices.
// Each step in the iteration returns a Slice object containing
// the next slice in the ConcatRows object.
// <br>
// It is used in Table and data manager classes (e.g. StManColumn).
// </synopsis>
// <example>
// This example shows how to iterate through a ConcatRows object
// (giving a slice) and through each of the slices.
// <srcblock>
// void somefunc (const ConcatRows& rownrs)
// // Iterate through all slices.
// ConcatRowsSliceIter rowiter(rownrs);
// while (! rowiter.pastEnd()) {
// // Get start, end, and increment for this slice.
// uInt rownr = rowiter.sliceStart();
// uInt end = rowiter.sliceEnd();
// uInt incr = rowiter.sliceIncr();
// // Iterate through the row numbers in the slice.
// while (rownr <= end) {
// rownr += incr;
// }
// // Go to next slice.
// rowiter++;
// }
// }
// </srcblock>
// </example>
//# <todo asof="$DATE:$">
//# A List of bugs, limitations, extensions or planned concatinements.
//# </todo>
class ConcatRowsIter
{
public:
// Construct the iterator on a ConcatRows object.
// It is set to the full range.
explicit ConcatRowsIter (const ConcatRows&);
// Construct the iterator on a ConcatRows object for the given row range.
ConcatRowsIter (const ConcatRows&, uInt start, uInt end, uInt incr=1);
// Is the iterator past the end?
Bool pastEnd() const
{ return itsPastEnd; }
// Go the next chunk.
// <group>
void operator++()
{ next(); }
void operator++(int)
{ next(); }
void next();
// </group>
// Get the current chunk.
RefRows getChunk() const
{ return RefRows(itsChunk, True); }
// Get the nr of the table the current chunk is in.
uInt tableNr() const
{ return itsPos; }
private:
const ConcatRows* itsRows;
Vector<uInt> itsChunk;
uInt itsStart;
uInt itsEnd;
uInt itsIncr;
uInt itsPos;
Bool itsPastEnd;
};
} //# NAMESPACE CASACORE - END
#endif
|