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Fix a bug where printf was erroneously printing a decimal point for

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%f and sufficiently short %g specifiers where the precision was
explicitly zero, no '#' flag was specified, and the floating point
argument was > 0 and <= 0.5.  While at it, add some comments to better
explain the relevant bits of code.

Noticed by:	Christoph Kukulies <kuku@physik.rwth-aachen.de>
This commit is contained in:
David Schultz 2003-04-14 11:24:53 +00:00
parent bb342a3713
commit 81ae2e9a4d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=113468
1 changed files with 10 additions and 8 deletions
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18
lib/libc/stdio/vfprintf.c
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@ -928,12 +928,14 @@ reswitch: switch (ch) {
if (prec > 1 || flags & ALT)
++size;
} else {
if (expt > 0) {
/* space for digits before decimal point */
if (expt > 0)
size = expt;
if (prec || flags & ALT)
size += prec + 1;
} else /* "0.X" */
size = prec + 2;
else /* "0" */
size = 1;
/* space for decimal pt and following digits */
if (prec || flags & ALT)
size += prec + 1;
if (grouping && expt > 0) {
/* space for thousands' grouping */
nseps = nrepeats = 0;
@ -1163,9 +1165,9 @@ number: if ((dprec = prec) >= 0)
} else { /* glue together f_p fragments */
if (!expchar) { /* %[fF] or sufficiently short %[gG] */
if (expt <= 0) {
buf[0] = '0';
buf[1] = *decimal_point;
PRINT(buf, 2);
PRINT(zeroes, 1);
if (prec || flags & ALT)
PRINT(decimal_point, 1);
PAD(-expt, zeroes);
/* already handled initial 0's */
prec += expt;