From 0359aa22e83881d7686144145fe42920fe943fa0 Mon Sep 17 00:00:00 2001 From: Kaz Kylheku Date: Sun, 16 Jul 2017 16:02:41 -0700 Subject: format: support leading zero printing for floats. For a floating-point argument, the following behavior is supported by the ~a, ~s and ~f format directives: if the precision has a leading zero, then leading zeros are added, up to one less than the field width. * stream.c (formatv): Set the precision to one less than the field width when rendering floats, rather than to zero. The output_num code takes the precision as the cue for padding zeros. * txr.1: Updated format documentation, and clarified a few things also. --- stream.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'stream.c') diff --git a/stream.c b/stream.c index 48738bb7..d5886336 100644 --- a/stream.c +++ b/stream.c @@ -3259,7 +3259,7 @@ val formatv(val stream_in, val fmtstr, struct args *al) vformat_str(stream, lit("#"), width, align, 0); continue; } - precision = 0; + precision = (width ? width - 1 : 0); goto output_num; } case 'd': @@ -3348,7 +3348,7 @@ val formatv(val stream_in, val fmtstr, struct args *al) continue; } - precision = 0; + precision = (width ? width - 1 : 0); goto output_num; default: if (width != 0 || precision_p) { -- cgit v1.2.3