From: Rich Felker <dalias@aerifal.cx>
Date: Mon, 16 Apr 2012 05:53:52 +0000 (-0400)
Subject: floatscan: fix incorrect count of leading nonzero digits
X-Git-Tag: v0.8.8~26
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=2ac580fdfe1daf9924f221dc98878ae480306bfa;p=oweals%2Fmusl.git

floatscan: fix incorrect count of leading nonzero digits

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.
---

diff --git a/src/internal/floatscan.c b/src/internal/floatscan.c
index 10123bfa..377a008b 100644
--- 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) {