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authorRob Landley <rob@landley.net>2016-02-10 22:31:59 -0600
committerRob Landley <rob@landley.net>2016-02-10 22:31:59 -0600
commite2d042c8e868a129396f03ec759e2ccdb8304833 (patch)
treede0f4ab5ff05f0e243e76a77ff518f2b9671ea56 /toys/lsb/seq.c
parentf435f0412aa4ca631aa178d10ed33008e34f37cb (diff)
downloadtoybox-e2d042c8e868a129396f03ec759e2ccdb8304833.tar.gz
Add seq -w, suggested by izabera.
Diffstat (limited to 'toys/lsb/seq.c')
-rw-r--r--toys/lsb/seq.c27
1 files changed, 23 insertions, 4 deletions
diff --git a/toys/lsb/seq.c b/toys/lsb/seq.c
index 3ff9ca44..4e401864 100644
--- a/toys/lsb/seq.c
+++ b/toys/lsb/seq.c
@@ -4,14 +4,14 @@
*
* http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/seq.html
-USE_SEQ(NEWTOY(seq, "<1>3?f:s:", TOYFLAG_USR|TOYFLAG_BIN))
+USE_SEQ(NEWTOY(seq, "<1>3?f:s:w[!fw]", TOYFLAG_USR|TOYFLAG_BIN))
config SEQ
bool "seq"
depends on TOYBOX_FLOAT
default y
help
- usage: seq [-f fmt_str] [-s sep_str] [first] [increment] last
+ usage: seq [-w|-f fmt_str] [-s sep_str] [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
@@ -19,6 +19,7 @@ config SEQ
-f Use fmt_str as a printf-style floating point format string
-s Use sep_str as separator, default is a newline character
+ -w Pad to equal width with leading zeroes.
*/
#define FOR_seq
@@ -44,8 +45,7 @@ static void insanitize(char *f)
void seq_main(void)
{
double first, increment, last, dd;
- char *sep_str = "\n";
- char *fmt_str = "%g";
+ char *sep_str = "\n", *fmt_str = "%g";
int output = 0;
// Parse command line arguments, with appropriate defaults.
@@ -57,6 +57,25 @@ void seq_main(void)
default: last = atof(toys.optargs[toys.optc-1]);
}
+ // Pad to largest width
+ if (toys.optflags & FLAG_w) {
+ char *s;
+ int i, len, dot, left = 0, right = 0;
+
+ for (i=0; i<3; i++) {
+ dd = (double []){first, increment, last}[i];
+
+ len = sprintf(toybuf, "%g", dd);
+ if ((s = strchr(toybuf, '.'))) {
+ dot = s-toybuf;
+ if (left<dot) left = dot;
+ dot = len-dot-1;
+ if (right<dot) right = dot;
+ } else if (len>left) left = len;
+ }
+
+ sprintf(fmt_str = toybuf, "%%0%d.%df", left+right+!!right, right);
+ }
if (toys.optflags & FLAG_f) insanitize(fmt_str = TT.fmt);
if (toys.optflags & FLAG_s) sep_str = TT.sep;