Handle input like 0.0e1000 correctly.

diff --git a/stdlib/strtod.c b/stdlib/strtod.c
index 7907dedde33c073b78c0dd0630aa414d4bfe7e2e..7398898abc24f34a7cdc476123806ac38b8b8540 100644 (file)
--- 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)
     {