diff options
Diffstat (limited to 'toys/lsb/seq.c')
| -rw-r--r-- | toys/lsb/seq.c | 27 |
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; |