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Fix strtod rounding of hex values (bug 14049).

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This commit is contained in:
Joseph Myers
2012-05-04 10:44:39 +00:00
parent 5197d9c2b4
commit 8f203e6cb6
4 changed files with 28 additions and 5 deletions
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19
stdlib/strtod_l.c
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@ -1,6 +1,5 @@
/* Convert string representing a number to float value, using given locale.
Copyright (C) 1997,1998,2002,2004,2005,2006,2007,2008,2009,2010,2011
Free Software Foundation, Inc.
Copyright (C) 1997-2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
@ -994,8 +993,20 @@ ____STRTOF_INTERNAL (nptr, endptr, group, loc)
retval[idx--] |= val >> (4 - pos - 1);
val <<= BITS_PER_MP_LIMB - (4 - pos - 1);
if (idx < 0)
return round_and_return (retval, exponent, negative, val,
BITS_PER_MP_LIMB - 1, dig_no > 0);
{
int rest_nonzero = 0;
while (--dig_no > 0)
{
if (*startp != L_('0'))
{
rest_nonzero = 1;
break;
}
startp++;
}
return round_and_return (retval, exponent, negative, val,
BITS_PER_MP_LIMB - 1, rest_nonzero);
}
retval[idx] = val;
pos = BITS_PER_MP_LIMB - 1 - (4 - pos - 1);