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printf(3): Handle multibyte decimal point in field size computation 

This patch fixes the problem reported in
  https://cygwin.com/ml/cygwin/2016-02/msg00014.html

  The 2009 changes to handle multibyte decimal point and thousands
  separator missed to take the length of a multibyte decimal point into
  account when computing the field size.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen 2016-02-08 13:33:17 +01:00
parent c5fee55606
commit c4dcfc1bda
1 changed files with 9 additions and 7 deletions
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16
newlib/libc/stdio/vfprintf.c
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@ -1332,7 +1332,7 @@ reswitch: switch (ch) {
expsize = exponent (expstr, expt, ch);
size = expsize + ndig;
if (ndig > 1 || flags & ALT)
++size;
size += decp_len;
# ifdef _WANT_IO_C99_FORMATS
flags &= ~GROUPING;
# endif
@ -1341,18 +1341,20 @@ reswitch: switch (ch) {
if (expt > 0) {
size = expt;
if (prec || flags & ALT)
size += prec + 1;
size += prec + decp_len;
} else /* "0.X" */
size = (prec || flags & ALT)
? prec + 2
? prec + 1 + decp_len
: 1;
} else if (expt >= ndig) { /* fixed g fmt */
size = expt;
if (flags & ALT)
++size;
} else
size = ndig + (expt > 0 ?
1 : 2 - expt);
size += decp_len;
} else {
size = ndig + decp_len;
if (expt <= 0)
size += 1 - expt;
}
# ifdef _WANT_IO_C99_FORMATS
if ((flags & GROUPING) && expt > 0) {
/* space for thousands' grouping */