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/* $Id: vimos_calib_impl.c,v 1.22 2013-10-22 16:57:09 cgarcia Exp $
*
* This file is part of the VIMOS Data Reduction Pipeline
* Copyright (C) 2006 European Southern Observatory
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string>
#include <cmath>
#include <sstream>
#include <vector>
#include <algorithm>
#include "vimos_lines.h"
#include <vimos_dfs.h>
//Get the list of lines after proper filtering
cpl_vector * vimos_lines_filter(cpl_frameset * frameset,
const char * ignore_lines,
const char * used_linesets)
{
cpl_table *wavelengths = NULL;
cpl_size nlines_all;
cpl_size n_selected = 0;
cpl_size i;
cpl_vector *lines;
double lambda;
int null;
const char * wcolumn = "WLEN";
const char * linesetcolumn = "LINE_SET";
/*
* Read the wavelengths table
*/
wavelengths = dfs_load_table(frameset, "LINE_CATALOG", 1);
if (wavelengths == NULL)
{
cpl_msg_error(cpl_func, "Cannot load line catalog");
return NULL;
}
nlines_all = cpl_table_get_nrow(wavelengths);
if (nlines_all == 0)
{
cpl_msg_error(cpl_func, "Empty input line catalog");
cpl_table_delete(wavelengths);
return NULL;
}
if (cpl_table_has_column(wavelengths, wcolumn) != 1 ||
cpl_table_has_column(wavelengths, linesetcolumn) != 1)
{
cpl_msg_error(cpl_func, "One or several of the following columns "
"are not present in input line catalog: %s %s",
wcolumn, linesetcolumn);
cpl_table_delete(wavelengths);
return NULL;
}
/*
* Deselect lines which are not in the lineset
*/
//Parse command line option used_linesets
std::stringstream used_linesets_ss(used_linesets);
std::vector<std::string> linesets;
std::string lineset;
//Parsing used_linesets (values are separated by comma)
while(std::getline(used_linesets_ss, lineset, ','))
linesets.push_back(lineset);
//Deselect lines which are not in the lineset
for(cpl_size iline = 0; iline < nlines_all; iline++)
{
if(cpl_table_get_string(wavelengths, linesetcolumn, iline) == NULL)
{
cpl_table_unselect_row(wavelengths, iline);
break;
}
std::string table_lineset =
cpl_table_get_string(wavelengths, linesetcolumn, iline);
if(std::find(linesets.begin(), linesets.end(), table_lineset) == linesets.end())
cpl_table_unselect_row(wavelengths, iline);
}
/*
* Deselect lines which are present in ignore_lines
*/
std::string ignore_lines_str(ignore_lines);
while(ignore_lines_str.length() > 0)
{
//Parsing ignore_lines (values are separated by comma)
std::string::size_type found = ignore_lines_str.find(',');
std::string lambda_str;
if(found != std::string::npos)
{
lambda_str = ignore_lines_str.substr(0, found);
ignore_lines_str = ignore_lines_str.substr(found+1);
}
else
{
lambda_str = ignore_lines_str;
ignore_lines_str = "";
}
std::istringstream iss(lambda_str);
if ( !(iss >> lambda) || !(iss.eof() || (iss >> std::ws && iss.eof())) )
{
cpl_msg_error(cpl_func, "Cannot interpret number in ignored_lines");
cpl_table_delete(wavelengths);
return NULL;
}
//Search for closest line in catalog. The line is unselected but
//it will be checked again against the next ignored line. In this way,
//if a value appears many times in the ignored_lines, only one line
//will be removed
cpl_size i_ignore = 0;
double min_lambda_dif =
std::fabs(lambda - cpl_table_get(wavelengths, wcolumn, 0, &null));
for (i = 1; i < nlines_all; i++)
{
double lambda_dif =
std::fabs(lambda - cpl_table_get(wavelengths, wcolumn, i, &null));
if(lambda_dif < min_lambda_dif)
{
min_lambda_dif = lambda_dif;
i_ignore = i;
}
}
cpl_table_unselect_row(wavelengths, i_ignore);
}
/* Create the final list of reference lines */
n_selected = cpl_table_count_selected(wavelengths);
lines = cpl_vector_new(n_selected);
cpl_size i_line = 0;
for (i = 0; i < nlines_all; i++)
{
lambda = cpl_table_get(wavelengths, wcolumn, i, &null);
if(cpl_table_is_selected(wavelengths, i))
{
cpl_vector_set(lines, i_line, lambda);
i_line++;
}
}
cpl_table_delete(wavelengths);
return lines;
}
/**@}*/
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