82 lines
2.3 KiB
C
82 lines
2.3 KiB
C
/*
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* Copyright (C) 2022 NHR@FAU, University Erlangen-Nuremberg.
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* All rights reserved. This file is part of nusif-solver.
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* Use of this source code is governed by a MIT style
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* license that can be found in the LICENSE file.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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//---
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#include "parameter.h"
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#include "util.h"
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#define MAXLINE 4096
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void initParameter(Parameter* param)
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{
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param->xlength = 1.0;
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param->ylength = 1.0;
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param->imax = 100;
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param->jmax = 100;
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param->itermax = 1000;
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param->eps = 0.0001;
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param->omg = 1.8;
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param->rho = 0.99;
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}
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void readParameter(Parameter* param, const char* filename)
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{
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FILE* fp = fopen(filename, "r");
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char line[MAXLINE];
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int i;
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if (!fp) {
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fprintf(stderr, "Could not open parameter file: %s\n", filename);
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exit(EXIT_FAILURE);
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}
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while (!feof(fp)) {
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line[0] = '\0';
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fgets(line, MAXLINE, fp);
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for (i = 0; line[i] != '\0' && line[i] != '#'; i++)
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;
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line[i] = '\0';
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char* tok = strtok(line, " ");
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char* val = strtok(NULL, " ");
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#define PARSE_PARAM(p, f) \
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if (strncmp(tok, #p, sizeof(#p) / sizeof(#p[0]) - 1) == 0) { \
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param->p = f(val); \
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}
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#define PARSE_STRING(p) PARSE_PARAM(p, strdup)
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#define PARSE_INT(p) PARSE_PARAM(p, atoi)
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#define PARSE_REAL(p) PARSE_PARAM(p, atof)
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if (tok != NULL && val != NULL) {
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PARSE_REAL(xlength);
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PARSE_REAL(ylength);
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PARSE_INT(imax);
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PARSE_INT(jmax);
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PARSE_INT(itermax);
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PARSE_REAL(eps);
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PARSE_REAL(omg);
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PARSE_REAL(rho);
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}
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}
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fclose(fp);
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}
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void printParameter(Parameter* param)
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{
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printf("Parameters:\n");
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printf("Geometry data:\n");
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printf("\tDomain box size (x, y): %e, %e\n", param->xlength, param->ylength);
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printf("\tCells (x, y): %d, %d\n", param->imax, param->jmax);
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printf("Iterative solver parameters:\n");
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printf("\tMax iterations: %d\n", param->itermax);
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printf("\tepsilon (stopping tolerance) : %e\n", param->eps);
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printf("\tomega (SOR relaxation): %e\n", param->omg);
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}
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