[FFmpeg-devel] regression - mpeg2 interlace/topfield flags not set anymore
Michel Bardiaux
mbardiaux
Mon Jan 28 11:06:51 CET 2008
Diego Biurrun a ?crit :
> On Sun, Jan 27, 2008 at 09:27:58AM +0100, christophelorenz wrote:
>> Rich Felker wrote:
>>
>>> Apparently libbrokenos needs to replace strtod with a working version...
>>>
>> Is there an alternative to libbrokenos ?
>
> Report a bug to MinGW. This is something you should do anyway.
>
Are we 100% sure strtod *should* accept 0x1234? On linux debian etch the
man page for strtod says this:
"A hexadecimal number consists of a ``0x'' or ``0X'' followed
by a nonempty sequence of hexadecimal digits possibly con-
taining a radix character, optionally followed by a binary
exponent. A binary exponent consists of a ``P'' or ``p'', fol-
lowed by an optional plus or minus sign, followed by a non-empty
sequence of decimal digits, and indicates multiplication
by a power of 2. At least one of radix character and binary
exponent must be present."
Seems to me 0x1234 is *not* legal since it contains neither radix nor
binary exponent...
Of course, man pages are not always the best source for standards!
Note that the official MS (on-web0 doc states:
"strtod expects nptr to point to a string of the following form:
[whitespace] [sign] [digits] [.digits] [ {d | D | e | E}[sign]digits]
A whitespace may consist of space and tab characters, which are ignored;
sign is either plus (+) or minus (?); and digits are one or more decimal
digits. If no digits appear before the radix character, at least one
must appear after the radix character. The decimal digits can be
followed by an exponent, which consists of an introductory letter (d, D,
e, or E) and an optionally signed integer. If neither an exponent part
nor a radix character appears, a radix character is assumed to follow
the last digit in the string. The first character that does not fit this
form stops the scan."
So it may be a bit too strong to say its broken, its just C89-compliant
and not C9x, something MS made no mystery about.
--
Michel Bardiaux
R&D Director
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