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/*
* beam-parameters.c
*
* Beam parameters
*
* Copyright © 2012 Deutsches Elektronen-Synchrotron DESY,
* a research centre of the Helmholtz Association.
*
* Authors:
* 2010,2012 Thomas White <taw@physics.org>
*
* This file is part of CrystFEL.
*
* CrystFEL 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 3 of the License, or
* (at your option) any later version.
*
* CrystFEL 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 CrystFEL. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include "beam-parameters.h"
#include "utils.h"
struct beam_params *get_beam_parameters(const char *filename)
{
FILE *fh;
struct beam_params *b;
char *rval;
int reject;
fh = fopen(filename, "r");
if ( fh == NULL ) return NULL;
b = calloc(1, sizeof(struct beam_params));
if ( b == NULL ) return NULL;
b->fluence = -1.0;
b->beam_radius = -1.0;
b->photon_energy = -1.0;
b->bandwidth = -1.0;
b->divergence = -1.0;
b->profile_radius = -1.0;
do {
int n1;
char line[1024];
int i;
char **bits;
rval = fgets(line, 1023, fh);
if ( rval == NULL ) break;
chomp(line);
n1 = assplode(line, " \t", &bits, ASSPLODE_NONE);
if ( n1 < 3 ) {
for ( i=0; i<n1; i++ ) free(bits[i]);
free(bits);
continue;
}
if ( bits[0][0] == ';' ) {
for ( i=0; i<n1; i++ ) free(bits[i]);
free(bits);
continue;
}
if ( strcmp(bits[0], "beam/fluence") == 0 ) {
b->fluence = atof(bits[2]);
} else if ( strcmp(bits[0], "beam/radius") == 0 ) {
b->beam_radius = atof(bits[2]);
} else if ( strcmp(bits[0], "beam/photon_energy") == 0 ) {
b->photon_energy = atof(bits[2]);
} else if ( strcmp(bits[0], "beam/bandwidth") == 0 ) {
b->bandwidth = atof(bits[2]);
} else if ( strcmp(bits[0], "beam/divergence") == 0 ) {
b->divergence = atof(bits[2]);
} else if ( strcmp(bits[0], "profile_radius") == 0 ) {
b->profile_radius = atof(bits[2]);
} else {
ERROR("Unrecognised field '%s'\n", bits[0]);
}
for ( i=0; i<n1; i++ ) free(bits[i]);
free(bits);
} while ( rval != NULL );
fclose(fh);
reject = 0;
if ( b->fluence < 0.0 ) {
ERROR("Invalid or unspecified value for 'beam/fluence'.\n");
reject = 1;
}
if ( b->beam_radius < 0.0 ) {
ERROR("Invalid or unspecified value for 'beam/radius'.\n");
reject = 1;
}
if ( b->photon_energy < 0.0 ) {
ERROR("Invalid or unspecified value for"
" 'beam/photon_energy'.\n");
reject = 1;
}
if ( b->bandwidth < 0.0 ) {
ERROR("Invalid or unspecified value for 'beam/bandwidth'.\n");
reject = 1;
}
if ( b->divergence < 0.0 ) {
ERROR("Invalid or unspecified value for 'beam/divergence'.\n");
reject = 1;
}
if ( b->profile_radius < 0.0 ) {
ERROR("WARNING: Invalid or unspecified value for "
"'profile_radius' in the beam parameters file.\n");
ERROR("Using the default value of 0.001 nm^-1.\n");
b->profile_radius = 0.001e9;
}
if ( reject ) {
ERROR("Please fix the above problems with the beam"
" parameters file and try again.\n");
return NULL;
}
return b;
}
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