busybox/coreutils/seq.c

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/* vi: set sw=4 ts=4: */
/*
* seq implementation for busybox
*
* Copyright (C) 2004, Glenn McGrath
*
* Licensed under the GPL v2, see the file LICENSE in this tarball.
*/
#include <stdio.h>
#include <stdlib.h>
#include "busybox.h"
int seq_main(int argc, char **argv);
int seq_main(int argc, char **argv)
{
double last, first, increment, i;
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first = increment = 1;
switch (argc) {
case 4:
increment = atof(argv[2]);
case 3:
first = atof(argv[1]);
case 2:
last = atof(argv[argc-1]);
break;
default:
bb_show_usage();
}
/* You should note that this is pos-5.0.91 semantics, -- FK. */
for (i = first;
(increment > 0 && i <= last) || (increment < 0 && i >=last);
i += increment)
{
printf("%g\n", i);
}
return EXIT_SUCCESS;
}