Visual Servoing Platform  version 3.2.0 under development (2018-08-18)
parse-argv1.cpp

Example of command line parsing.

/****************************************************************************
*
* This file is part of the ViSP software.
* Copyright (C) 2005 - 2017 by Inria. All rights reserved.
*
* This software 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.
* See the file LICENSE.txt at the root directory of this source
* distribution for additional information about the GNU GPL.
*
* For using ViSP with software that can not be combined with the GNU
* GPL, please contact Inria about acquiring a ViSP Professional
* Edition License.
*
* See http://visp.inria.fr for more information.
*
* This software was developed at:
* Inria Rennes - Bretagne Atlantique
* Campus Universitaire de Beaulieu
* 35042 Rennes Cedex
* France
*
* If you have questions regarding the use of this file, please contact
* Inria at visp@inria.fr
*
* This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
* WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* Description:
* Example of command line parsing.
*
* Author:
* Fabien Spindler
*
*****************************************************************************/
#include <iomanip>
#include <sstream>
#include <stdio.h>
#include <stdlib.h>
#include <visp3/core/vpDebug.h>
#include <visp3/io/vpParseArgv.h>
// List of allowed command line options
#define GETOPTARGS "d:f:i:h"
void usage(const char *name, const char *badparam, int i_val, float f_val, double d_val);
bool getOptions(int argc, const char **argv, int &i_val, float &f_val, double &d_val);
void usage(const char *name, const char *badparam, int i_val, float f_val, double d_val)
{
fprintf(stdout, "\n\
Parsing command line arguments example.\n\
\n\
SYNOPSIS\n\
%s [-i <integer>] [-f <float>] [-d <double> [-h]\n\
", name);
fprintf(stdout, "\n\
OPTIONS: Default\n\
-i <integer> %d\n\
An integer value.\n\
\n\
-f <float> %f\n\
A float value.\n\
\n\
-d <double> %g\n\
A double value.\n\
\n\
-h\n\
Print the help.\n\n", i_val, f_val, d_val);
if (badparam) {
fprintf(stderr, "ERROR: \n");
fprintf(stderr, "\nBad parameter [%s]\n", badparam);
}
}
bool getOptions(int argc, const char **argv, int &i_val, float &f_val, double &d_val)
{
const char *optarg_;
int c;
while ((c = vpParseArgv::parse(argc, argv, GETOPTARGS, &optarg_)) > 1) {
switch (c) {
case 'd':
d_val = atof(optarg_);
break;
case 'f':
f_val = (float)atof(optarg_);
break;
case 'i':
i_val = atoi(optarg_);
break;
case 'h':
usage(argv[0], NULL, i_val, f_val, d_val);
return false;
break;
default:
usage(argv[0], optarg_, i_val, f_val, d_val);
return false;
break;
}
}
if ((c == 1) || (c == -1)) {
// standalone param or error
usage(argv[0], NULL, i_val, f_val, d_val);
std::cerr << "ERROR: " << std::endl;
std::cerr << " Bad argument " << optarg_ << std::endl << std::endl;
return false;
}
return true;
}
int main(int argc, const char **argv)
{
try {
using ::std::cout;
using ::std::endl;
int i_val = 3;
float f_val = 3.14f;
double d_val = 3.1415;
// Read the command line options
if (getOptions(argc, argv, i_val, f_val, d_val) == false) {
return (-1);
}
cout << "Your parameters: " << endl;
cout << " Integer value: " << i_val << endl;
cout << " Float value: " << f_val << endl;
cout << " Double value: " << d_val << endl << endl;
cout << "Call " << argv[0] << " -h to see how to change these parameters." << endl;
return EXIT_SUCCESS;
} catch (const vpException &e) {
std::cout << "Catch a ViSP exception: " << e << std::endl;
return EXIT_FAILURE;
}
}