/usr/include/casacore/fits/FITS/FITSDateUtil.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 | //# FITSDateUtil.h: Class of static functions to help with FITS dates.
//# Copyright (C) 2002
//# 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 FITS_FITSDATEUTIL_H
#define FITS_FITSDATEUTIL_H
#include <casacore/casa/aips.h>
#include <casacore/measures/Measures/MEpoch.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
class String;
class MVTime;
// <summary>
// A class with static functions to help deal with FITS dates
// </summary>
// <use visibility=export>
// <reviewed reviewer="Eric Sessoms" date="2002/08/19" tests="tFITSDateUtil.cc">
// </reviewed>
// <prerequisite>
// <li> General knowledge of FITS, particularly FITS date keywords,
// is assumed.
// </prerequisite>
//
// <etymology>
// This is a collection of static utility functions for creating and
// interpreting FITS date keywords (e.g. DATE-OBS).
// </etymology>
//
// <synopsis>
// Its never necessary to construct a FITSDateUtil, just use the
// static functions to help handle FITS dates.
// </synopsis>
//
// <motivation>
// The strings that make up the value of FITS dates have a
// precise format. This class encompasses knowlege of the formats
// used and hopefully simplifies their creation and conversion
// to and from Casacore MVTimes.
// </motivation>
//
class FITSDateUtil
{
public:
enum DateStyle {
// dd/mm/yy
OLD,
// yyyy-mm-dd
NEW_DATEONLY,
// yyyy-mm-ddThh:mm:ss[.ss...]
NEW_DATEANDTIME,
// OLD if the current year is before 1998 AND "time" is before 1998,
// otherwise NEW_DATEANDTIME.
AUTO_PICK};
// Convert an MVTime to a FITS date string and timesys string. The
// time system must also be supplied.
// Precision is only used when the time as well as the date is used
// (NEW_DATEANDTIME or AUTO_PICK).
// The default (16) gives 10^(-10) second accuracy, 6 gives second level
// accuracy. Default is 10^(-6)s (1 micro-s) accuracy. 0 means date only,
// no time (equivalent to NEW_DATEONLY).
static void toFITS(String &date, String ×ys, const MVTime &time,
MEpoch::Types system = MEpoch::UTC,
DateStyle style= AUTO_PICK, uInt precision=12);
// Convert a FITS date string and TIMESYS keyword value into an MVTime and system.
// Returns False if it can't decode date and timesys. It tries to convert as
// much as possible, for example if it can't decode timesys it still
// attempts to decode the time. It sets the date to Jan 1/1900 if it can't
// decode the time, and UTC if it can't decode timesys. If timesys is the
// empty string then UTC is assumed.
static Bool fromFITS(MVTime &time, MEpoch::Types &system,
const String &date,
const String ×ys);
// Convert a FITS Date string to the current format. If the "in" format is
// already correct it is just copied through.
static Bool convertDateString(String &out, const String &in);
// Determine the precision in a FITS date string.
// Old style dates or no time returns 0, New style + time returns 6 + the number
// of decimal points, i.e. if we have a time at all we assume it is at least
// accurate to the second level. The result of this can be used in the call
// to toFITS, i.e. it has the same meaning.
//
// This is mostly meant to be a helper function for convertDateString, but
// it may be called by anyone.
static uInt findPrecision(const String &fitsDate);
};
} //# NAMESPACE CASACORE - END
#endif
|