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floatscan: fix incorrect count of leading nonzero digits
author
Rich Felker
<dalias@aerifal.cx>
Mon, 16 Apr 2012 05:53:52 +0000
(
01:53
-0400)
committer
Rich Felker
<dalias@aerifal.cx>
Mon, 16 Apr 2012 05:53:52 +0000
(
01:53
-0400)
this off-by-one error was causing values with just one digit past the
decimal point to be treated by the integer case. in many cases it
would yield the correct result, but if expressions are evaluated in
excess precision, double rounding may occur.
src/internal/floatscan.c
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diff --git
a/src/internal/floatscan.c
b/src/internal/floatscan.c
index
10123bf
..
377a008
100644
(file)
--- a/
src/internal/floatscan.c
+++ b/
src/internal/floatscan.c
@@
-81,8
+81,8
@@
static long double decfloat(FILE *f, int c, int bits, int emin, int sign, int po
if (lrp!=-1) break;
lrp = dc;
} else if (k < KMAX-2) {
- if (c!='0') lnz = dc;
dc++;
+ if (c!='0') lnz = dc;
if (j) x[k] = x[k]*10 + c-'0';
else x[k] = c-'0';
if (++j==9) {