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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 "libbb.h"
/* This is a NOFORK applet. Be very careful! */
int seq_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int seq_main(int argc, char **argv)
{
enum {
OPT_w = (1 << 0),
OPT_s = (1 << 1),
};
double last, increment, i;
const char *sep, *opt_s = "\n";
unsigned opt = getopt32(argv, "+ws:", &opt_s);
unsigned width = 0;
argc -= optind;
argv += optind;
i = increment = 1;
switch (argc) {
case 3:
increment = atof(argv[1]);
case 2:
i = atof(*argv);
case 1:
last = atof(argv[argc-1]);
break;
default:
bb_show_usage();
}
if (opt & OPT_w) /* Pad to length of start or last */
width = MAX(strlen(*argv), strlen(argv[argc-1]));
/* You should note that this is pos-5.0.91 semantics, -- FK. */
sep = "";
while ((increment > 0 && i <= last) || (increment < 0 && i >= last)) {
printf("%s%0*g", sep, width, i);
sep = opt_s;
i += increment;
}
bb_putchar('\n');
return fflush(stdout);
}
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