| 1 | //#---------------------------------------------------------------------------
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| 2 | //# FITSreader.cc: ATNF single-dish FITS reader.
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| 3 | //#---------------------------------------------------------------------------
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| 4 | //# Copyright (C) 2000-2006
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| 5 | //# Mark Calabretta, ATNF
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| 6 | //#
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| 7 | //# This library is free software; you can redistribute it and/or modify it
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| 8 | //# under the terms of the GNU Library General Public License as published by
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| 9 | //# the Free Software Foundation; either version 2 of the License, or (at your
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| 10 | //# option) any later version.
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| 11 | //#
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| 12 | //# This library is distributed in the hope that it will be useful, but WITHOUT
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| 13 | //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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| 14 | //# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
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| 15 | //# License for more details.
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| 16 | //#
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| 17 | //# You should have received a copy of the GNU Library General Public License
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| 18 | //# along with this library; if not, write to the Free Software Foundation,
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| 19 | //# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
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| 20 | //#
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| 21 | //# Correspondence concerning this software should be addressed as follows:
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| 22 | //# Internet email: mcalabre@atnf.csiro.au.
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| 23 | //# Postal address: Dr. Mark Calabretta,
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| 24 | //# Australia Telescope National Facility,
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| 25 | //# P.O. Box 76,
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| 26 | //# Epping, NSW, 2121,
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| 27 | //# AUSTRALIA
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| 28 | //#
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| 29 | //# $Id: FITSreader.cc,v 19.3 2008-09-12 02:37:37 cal103 Exp $
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| 30 | //#---------------------------------------------------------------------------
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| 31 | //# The FITSreader class is an abstract base class for the Parkes Multibeam
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| 32 | //# RPFITS and SDFITS readers.
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| 33 | //#
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| 34 | //# Original: 2000/07/28 Mark Calabretta
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| 35 | //#---------------------------------------------------------------------------
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| 36 |
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| 37 | #include <atnf/PKSIO/FITSreader.h>
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| 38 |
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| 39 | #include <algorithm>
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| 40 |
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| 41 | using namespace std;
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| 42 |
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| 43 | //--------------------------------------------------------- FITSreader::select
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| 44 |
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| 45 | // Set data selection criteria. Note that cBeams and cIFs, the addresses of
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| 46 | // int arrays, are returned by open() thereby allowing their elements to be
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| 47 | // modified directly elsewhere (specifically by PKSFITSreader::select()).
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| 48 |
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| 49 | int FITSreader::select(
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| 50 | const int startChan[],
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| 51 | const int endChan[],
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| 52 | const int refChan[],
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| 53 | const int getSpectra,
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| 54 | const int getXPol,
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| 55 | const int coordSys)
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| 56 | {
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| 57 | int maxNChan = 0;
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| 58 |
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| 59 | for (int iIF = 0; iIF < cNIF; iIF++) {
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| 60 | if (!cIFs[iIF]) {
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| 61 | continue;
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| 62 | }
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| 63 |
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| 64 | cStartChan[iIF] = startChan[iIF];
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| 65 | cEndChan[iIF] = endChan[iIF];
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| 66 | cRefChan[iIF] = refChan[iIF];
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| 67 |
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| 68 | if (cStartChan[iIF] <= 0) {
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| 69 | cStartChan[iIF] += cNChan[iIF];
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| 70 | } else if (cStartChan[iIF] > cNChan[iIF]) {
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| 71 | cStartChan[iIF] = cNChan[iIF];
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| 72 | }
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| 73 |
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| 74 | if (cEndChan[iIF] <= 0) {
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| 75 | cEndChan[iIF] += cNChan[iIF];
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| 76 | } else if (cEndChan[iIF] > cNChan[iIF]) {
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| 77 | cEndChan[iIF] = cNChan[iIF];
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| 78 | }
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| 79 |
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| 80 | maxNChan = max(maxNChan, abs(cEndChan[iIF] - cStartChan[iIF]) + 1);
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| 81 | }
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| 82 |
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| 83 | cGetSpectra = getSpectra && cHaveSpectra;
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| 84 | cGetXPol = getXPol && cGetXPol;
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| 85 | cCoordSys = coordSys;
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| 86 |
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| 87 | return maxNChan;
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| 88 | }
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