hush/coreutils/seq.c

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/* vi: set sw=4 ts=4: */
/*
* seq implementation for busybox
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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 Library 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include "busybox.h"
extern int seq_main(int argc, char **argv)
{
double last;
double first = 1;
double increment = 1;
double i;
if (argc == 4) {
first = atof(argv[1]);
increment = atof(argv[2]);
} else if (argc == 3) {
first = atof(argv[1]);
} else if (argc != 2) {
bb_show_usage();
}
last = atof(argv[argc - 1]);
/* You should note that this is pos-5.0.91 semantics, -- FK. */
if ((first > last) && (increment > 0)) {
return EXIT_SUCCESS;
}
for (i = first; ((first <= last) ? (i <= last) : (i >= last));
i += increment) {
printf("%g\n", i);
}
return EXIT_SUCCESS;
}