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[BZ #3673]

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* stdlib/strtod_l.c (____STRTOF_INTERNAL): Fix exp_limit
	computation.
	* stdlib/Makefile (tests): Add tst-atof2.
	* stdlib/tst-atof2.c: New file.

	* stdlib/Makefile (tests): Add tst-atof1.
	* stdlib/tst-atof1.c: New file.
This commit is contained in:
Ulrich Drepper
2006-12-10 01:11:45 +00:00
parent d117c1ce4d
commit 2282c90c42
4 changed files with 74 additions and 8 deletions
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16
stdlib/strtod_l.c
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@ -759,13 +759,15 @@ ____STRTOF_INTERNAL (nptr, endptr, group, loc)
}
}
/* We have the number digits in the integer part. Whether these are all or
any is really a fractional digit will be decided later. */
/* We have the number of digits in the integer part. Whether these
are all or any is really a fractional digit will be decided
later. */
int_no = dig_no;
lead_zero = int_no == 0 ? -1 : 0;
/* Read the fractional digits. A special case are the 'american style'
numbers like `16.' i.e. with decimal but without trailing digits. */
/* Read the fractional digits. A special case are the 'american
style' numbers like `16.' i.e. with decimal point but without
trailing digits. */
if (
#ifdef USE_WIDE_CHAR
c == (wint_t) decimal
@ -815,15 +817,16 @@ ____STRTOF_INTERNAL (nptr, endptr, group, loc)
if (base == 16)
exp_limit = (exp_negative ?
-MIN_EXP + MANT_DIG + 4 * int_no :
MAX_EXP - 4 * int_no + lead_zero);
MAX_EXP - 4 * int_no + 4 * lead_zero + 3);
else
exp_limit = (exp_negative ?
-MIN_10_EXP + MANT_DIG + int_no :
MAX_10_EXP - int_no + lead_zero);
MAX_10_EXP - int_no + lead_zero + 1);
do
{
exponent *= 10;
exponent += c - L_('0');
if (exponent > exp_limit)
/* The exponent is too large/small to represent a valid
@ -853,7 +856,6 @@ ____STRTOF_INTERNAL (nptr, endptr, group, loc)
/* NOTREACHED */
}
exponent += c - L_('0');
c = *++cp;
}
while (c >= L_('0') && c <= L_('9'));