This fixes a wrong estimate of a buffer size, when a format directive
'a' or 'A' is used.
Fortunately this affects only platforms without snprintf or _snprintf
functions, i.e. systems such as OSF/1 4.0 or Solaris < 2.6.
2007-02-25 Bruno Haible <[EMAIL PROTECTED]>
* lib/vasnprintf.c (VASNPRINTF): Fix estimate of size needed for a
'a' or 'A' conversion.
*** lib/vasnprintf.c 30 Jan 2007 01:07:22 -0000 1.22
--- lib/vasnprintf.c 25 Feb 2007 21:10:43 -0000
***************
*** 430,441 ****
break;
case 'e': case 'E': case 'g': case 'G':
- case 'a': case 'A':
tmp_length =
12; /* sign, decimal point, exponent etc. */
tmp_length = xsum (tmp_length, precision);
break;
case 'c':
# if HAVE_WINT_T && !WIDE_CHAR_VERSION
if (type == TYPE_WIDE_CHAR)
--- 430,461 ----
break;
case 'e': case 'E': case 'g': case 'G':
tmp_length =
12; /* sign, decimal point, exponent etc. */
tmp_length = xsum (tmp_length, precision);
break;
+ case 'a': case 'A':
+ # if HAVE_LONG_DOUBLE
+ if (type == TYPE_LONGDOUBLE)
+ tmp_length =
+ (unsigned int) (LDBL_DIG
+ * 0.831 /* decimal -> hexadecimal */
+ )
+ + 1; /* turn floor into ceil */
+ else
+ # endif
+ tmp_length =
+ (unsigned int) (DBL_DIG
+ * 0.831 /* decimal -> hexadecimal */
+ )
+ + 1; /* turn floor into ceil */
+ if (tmp_length < precision)
+ tmp_length = precision;
+ /* Account for sign, decimal point etc. */
+ tmp_length = xsum (tmp_length, 12);
+ break;
+
case 'c':
# if HAVE_WINT_T && !WIDE_CHAR_VERSION
if (type == TYPE_WIDE_CHAR)
