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/* Copyright (C) 2006 Imperial College London and others.
Please see the AUTHORS file in the main source directory for a full list
of copyright holders.
Dr Gerard Gorman
Applied Modelling and Computation Group
Department of Earth Science and Engineering
Imperial College London
g.gorman@imperial.ac.uk
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation,
version 2.1 of the License.
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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA
*/
#include "Calendar.h"
using namespace std;
Calendar::Calendar(){
#ifdef HAVE_LIBUDUNITS
if(!utIsInit()){
// The definitions in the units file are read into memory.
int err = utInit(NULL);
if(err==UT_ENOFILE){
cerr<<"ERROR ("<<__FILE__<<"): The units file doesn’t exist.\n";
}else if(err==UT_ESYNTAX){
cerr<<"ERROR ("<<__FILE__<<"): The units file contains a syntax error.\n";
}else if(err==UT_EUNKNOWN){
cerr<<"ERROR ("<<__FILE__<<"): The units file contains an unknown specification.\n";
}else if(err==UT_EIO){
cerr<<"ERROR ("<<__FILE__<<"): An I/O error occurred while accessing the units file.\n";
}else if(err==UT_EALLOC){
cerr<<"ERROR ("<<__FILE__<<"): A memory allocation failure occurred.\n";
}
if(err)
exit(err);
}
#else
cerr<<"ERROR ("<<__FILE__<<"): No udunits support.\n";
exit(1);
#endif
SetTransformation("seconds since 1-1-1 0:0:0",
"seconds since 1-1-1 0:0:0",
"none");
}
Calendar::Calendar(const Calendar& in){
*this = in;
}
const Calendar& Calendar::operator=(const Calendar &in){
#ifdef HAVE_LIBUDUNITS
from_unit = in.from_unit;
to_unit = in.to_unit;
#endif
calendar = in.calendar;
return *this;
}
Calendar::~Calendar(){}
int Calendar::SetTransformation(string _from_unit, string _to_unit, string _calendar){
int err=0;
// Reserved for future use...
// calendar = _calendar;
#ifdef HAVE_LIBUDUNITS
err = utScan(_from_unit.c_str(), &from_unit);
if(err==UT_ENOINIT){
cerr<<"ERROR ("<<__FILE__<<"): UDUNITS has not been initialized.\n";
}else if(err==UT_EINVALID){
cerr<<"ERROR ("<<__FILE__<<"): The unit argument is a null pointer.\n";
}else if(err==UT_EUNKNOWN){
cerr<<"ERROR ("<<__FILE__<<"): The specification contains an unknown unit.\n";
}else if(err==UT_ESYNTAX){
cerr<<"ERROR ("<<__FILE__<<"): The specification contains a syntax error.\n";
}
if(err)
exit(-1);
err = utScan(_to_unit.c_str(), &to_unit);
if(err==UT_ENOINIT){
cerr<<"ERROR ("<<__FILE__<<"): UDUNITS has not been initialized.\n";
}else if(err==UT_EINVALID){
cerr<<"ERROR ("<<__FILE__<<"): The unit argument is a null pointer.\n";
}else if(err==UT_EUNKNOWN){
cerr<<"ERROR ("<<__FILE__<<"): The specification contains an unknown unit.\n";
}else if(err==UT_ESYNTAX){
cerr<<"ERROR ("<<__FILE__<<"): The specification contains a syntax error.\n";
}
if(err)
exit(-1);
err = utConvert(&from_unit, &to_unit, &slope, &intercept);
if(err==UT_ENOINIT){
cerr<<"ERROR ("<<__FILE__<<"): The package has not been initialized.\n";
}else if(err==UT_EINVALID){
cerr<<"ERROR ("<<__FILE__<<"): The unit structures is invalid.\n";
}else if(err==UT_ECONVERT){
cerr<<"ERROR ("<<__FILE__<<"): The units are not convertible.\n"
<<"from_unit = "<<_from_unit<<endl
<<"to_unit = "<<_to_unit<<endl;
}
if(err)
exit(-1);
#else
cerr<<"ERROR ("<<__FILE__<<"): No udunits support.\n";
exit(1);
#endif
return err;
}
int Calendar::Convert(double from_value, double& to_value){
to_value = slope*from_value + intercept;
return 0;
}
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