[FFmpeg-devel] regression - mpeg2 interlace/topfield flags not set anymore

[Michel Bardiaux]

M?ns Rullg?rd wrote:
> Michel Bardiaux wrote:
[snip]

>> 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!
> 
> The spec says this:
> 
>   The expected form of the subject sequence is an optional plus or minus
>   sign, then one of the following:
>   [...]
>   - A 0x or 0X, then a non-empty sequence of hexadecimal digits optionally
>     containing a radix character, then an optional binary exponent part
> 
> Clearly, they are both optional.
> 
> See also http://www.opengroup.org/onlinepubs/009695399/functions/strtod.html,
> in particular the example at the end of the page.

Meaning the man page is again wrong (or at the very least, very badly 
written). Annoying but hardly surprising.

>