[Bug libc/6467] New: strtod "0.0" returns nonzero

["eberlein at us dot ibm dot com" <sourceware-bugzilla at sourceware dot org>]

Consider the following code snippet.

printf("%g", strtof("0.0", NULL))
printf("%lg", strtod("0.0", NULL))
printf("%llg", strtold("0.0", NULL))

When executed, expecting to see zeroes, the output is: 

2.216671e-231
2.216671e-231
2.216671e-231

This seems to be due to strtod_l.c setting
 int_no is 0
 lead_zero = -1 
and later 
 dig_no -= lead_zero
This increases the number of digits considered for fractional digits since
 dig_no - int_no
is passed to str_to_mpn.  This causes the null string terminator to be
considered as a digit in the fractional digits.

-- 
           Summary: strtod "0.0" returns nonzero
           Product: glibc
           Version: 2.4
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper at redhat dot com
        ReportedBy: eberlein at us dot ibm dot com
                CC: glibc-bugs at sources dot redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=6467

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