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From e314258e2fe75b7443db84d2927315dea0f337c8 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Thu, 20 Oct 2016 14:40:59 -0400
Subject: [PATCH 25/25] fix minor problem in previous strtod non-nearest
rounding bug fix
commit 6ffdc4579ffb34f4aab69ab4c081badabc7c0a9a set lnz in the code
path for non-zero digits after a huge string of zeros, but the
assignment of dc to lnz truncates if the value of dc does not fit in
int; this is possible for some pathologically long inputs, either via
strings on 64-bit systems or via scanf-family functions.
instead, simply set lnz to match the point at which we add the
artificial trailing 1 bit to simulate nonzero digits after a huge
run of zeros.
---
src/internal/floatscan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/internal/floatscan.c b/src/internal/floatscan.c
index ae09852..278bf25 100644
--- a/src/internal/floatscan.c
+++ b/src/internal/floatscan.c
@@ -111,7 +111,7 @@ static long double decfloat(FILE *f, int c, int bits, int emin, int sign, int po
} else {
dc++;
if (c!='0') {
- lnz = dc;
+ lnz = (KMAX-4)*9;
x[KMAX-4] |= 1;
}
}
--
2.10.1
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