From: Ulrich Drepper <drepper@redhat.com>
Date: Wed, 19 Nov 1997 23:26:56 +0000 (+0000)
Subject: Handle input like 0.0e1000 correctly.
X-Git-Tag: cvs/glibc-2_0_6-pre2~24
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5e38f61608018b713833c6c78c351711cc3fc528;p=thirdparty%2Fglibc.git

Handle input like 0.0e1000 correctly.
---

diff --git a/stdlib/strtod.c b/stdlib/strtod.c
index 7907dedde33..7398898abc2 100644
--- a/stdlib/strtod.c
+++ b/stdlib/strtod.c
@@ -562,10 +562,18 @@ INTERNAL (STRTOF) (nptr, endptr, group)
 		{
 	 	  FLOAT retval;
 
-		  /* Overflow or underflow.  */
-		  __set_errno (ERANGE);
-		  retval = (exp_negative ? 0.0 :
-			    negative ? -FLOAT_HUGE_VAL : FLOAT_HUGE_VAL);
+		  /* We have to take care for special situation: a joker
+		     might have written "0.0e100000" which is in fact
+		     zero.  */
+		  if (lead_zero == -1)
+		    retval = !negative ? 0.0 : -0.0;
+		  else
+		    {
+		      /* Overflow or underflow.  */
+		      __set_errno (ERANGE);
+		      retval = (exp_negative ? 0.0 :
+				negative ? -FLOAT_HUGE_VAL : FLOAT_HUGE_VAL);
+		    }
 
 		  /* Accept all following digits as part of the exponent.  */
 		  do
@@ -606,7 +614,7 @@ INTERNAL (STRTOF) (nptr, endptr, group)
     *endptr = (STRING_TYPE *) cp;
 
   if (dig_no == 0)
-    return 0.0;
+    return !negative ? 0.0 : -0.0;
 
   if (lead_zero)
     {