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/*********************************************************************
Example source code for using the argtable2 library to implement:
Usage: hasoptvalue -f <int> [-f <int>] [-f <int>] -b [<int>] [-b [<int>]] [-b [<int>]] [--help] [--version]
This program demonstrates the use of the argtable2 library
-f, --foo=<int> takes an integer value (defaults to 9)
-b, --bar=[<int>] takes an optional integer value (defaults to 5)
--help print this help and exit
--version print version information and exit
This file is part of the argtable2 library.
Copyright (C) 1998-2001,2003-2011 Stewart Heitmann
sheitmann@users.sourceforge.net
The argtable2 library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This software 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
Library General Public License for more details.
You should have received a copy of the GNU Library 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 <argtable2.h>
int main(int argc, char **argv)
{
struct arg_int *foo = arg_intn("f","foo", NULL,1,3, "takes an integer value (defaults to 9)");
struct arg_int *bar = arg_intn("b","bar", NULL,1,3, "takes an optional integer value (defaults to 5)");
struct arg_lit *help = arg_lit0(NULL,"help", "print this help and exit");
struct arg_lit *version = arg_lit0(NULL,"version", "print version information and exit");
struct arg_end *end = arg_end(20);
void* argtable[] = {foo,bar,help,version,end};
const char* progname = "hasoptvalue";
int nerrors;
int exitcode=0;
int i;
/* verify the argtable[] entries were allocated sucessfully */
if (arg_nullcheck(argtable) != 0)
{
/* NULL entries were detected, some allocations must have failed */
printf("%s: insufficient memory\n",progname);
exitcode=1;
goto exit;
}
/* set foo default values to 9 */
for (i=0; i<foo->hdr.maxcount; i++)
foo->ival[i]=9;
/* allow bar to have optional values */
/* and set bar default values to 5 */
bar->hdr.flag |= ARG_HASOPTVALUE;
for (i=0; i<bar->hdr.maxcount; i++)
bar->ival[i]=5;
/* Parse the command line as defined by argtable[] */
nerrors = arg_parse(argc,argv,argtable);
/* special case: '--help' takes precedence over error reporting */
if (help->count > 0)
{
printf("Usage: %s", progname);
arg_print_syntax(stdout,argtable,"\n");
printf("This program demonstrates the use of the argtable2 library\n");
arg_print_glossary(stdout,argtable," %-25s %s\n");
exitcode=0;
goto exit;
}
/* special case: '--version' takes precedence error reporting */
if (version->count > 0)
{
printf("'%s' example program for the \"argtable\" command line argument parser.\n",progname);
printf("September 2005, Stewart Heitmann\n");
exitcode=0;
goto exit;
}
/* If the parser returned any errors then display them and exit */
if (nerrors > 0)
{
/* Display the error details contained in the arg_end struct.*/
arg_print_errors(stdout,end,progname);
printf("Try '%s --help' for more information.\n",progname);
exitcode=1;
goto exit;
}
/* special case: uname with no command line options induces brief help */
if (argc==1)
{
printf("Try '%s --help' for more information.\n",progname);
exitcode=0;
goto exit;
}
/* command line arguments are successfully parsed at this point. */
/* print what we have parsed */
printf("%d instances of --foo detected on command line\n", foo->count);
for (i=0; i<foo->hdr.maxcount; i++)
printf("foo[%d] = %d\n", i, foo->ival[i]);
printf("%d instances of --bar detected on command line\n", bar->count);
for (i=0; i<bar->hdr.maxcount; i++)
printf("bar[%d] = %d\n", i, bar->ival[i]);
exit:
/* deallocate each non-null entry in argtable[] */
arg_freetable(argtable,sizeof(argtable)/sizeof(argtable[0]));
return exitcode;
}
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