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/* seq.c - Count from first to last, by increment.
*
* Copyright 2006 Rob Landley <rob@landley.net>
*
* http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/seq.html
USE_SEQ(NEWTOY(seq, "<1>3?", TOYFLAG_USR|TOYFLAG_BIN))
config SEQ
bool "seq"
depends on TOYBOX_FLOAT
default y
help
usage: seq [first] [increment] last
Count from first to last, by increment. Omitted arguments default
to 1. Two arguments are used as first and last. Arguments can be
negative or floating point.
*/
#include "toys.h"
void seq_main(void)
{
double first, increment, last, dd;
// Parse command line arguments, with appropriate defaults.
// Note that any non-numeric arguments are treated as zero.
first = increment = 1;
switch (toys.optc) {
case 3:
increment = atof(toys.optargs[1]);
case 2:
first = atof(*toys.optargs);
default:
last = atof(toys.optargs[toys.optc-1]);
}
// Yes, we're looping on a double. Yes rounding errors can accumulate if
// you use a non-integer increment. Deal with it.
for (dd=first; (increment>0 && dd<=last) || (increment<0 && dd>=last);
dd+=increment)
{
printf("%g\n", dd);
}
}
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