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Re: Problem with printf-like logging framework and inline hexdumps.

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On 14-09-12 23:49, Ben Bacarisse wrote:
> Ben Bacarisse <ben.usenet@bsb.me.uk> writes:
> <snip>
>> There may be no correct va_start/va_copy/va_end pattern that works.  If
>> so, that's a great shame, but it was presumably unavoidable.  I can't
>> believe this old trick was ruled un-portable without it having to be so
>> ruled.  I'll give it some more thought...
>
> I have thunk and I think there is no suitable pattern of
> va_start/va_copy/va_end calls that will work.
>
> This means that the only way to add your own formats (portably) is to
> keep a synchronised copy of the va_list: you duplicate it at the start,
> and you duplicate the current state when you call vprintf to process one
> or more of its formats.  When vprintf returns, you must scan the format
> and execute the same va_args calls the vprintf will have used.
>
> That makes it much more fiddly because of all the types that might be
> involved.  And to do this requires actually parsing the format
> specifiers which is not trivial.
>
> Seems a pity...

A pity indeed. Implementing my own printf function isn't trivial and a bit 
overkill for my needs.

Jef

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Thread

Problem with printf-like logging framework and inline hexdumps. Jef Driesen <jefdriesen@hotmail.com.invalid> - 2012-09-13 18:11 +0200
  Re: Problem with printf-like logging framework and inline hexdumps. "Heinrich Wolf" <invalid@invalid.invalid> - 2012-09-13 18:55 +0200
    Re: Problem with printf-like logging framework and inline hexdumps. Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-09-20 17:19 +0000
  Re: Problem with printf-like logging framework and inline hexdumps. Barry Schwarz <schwarzb@dqel.com> - 2012-09-13 11:26 -0700
    Re: Problem with printf-like logging framework and inline hexdumps. Jef Driesen <jefdriesen@hotmail.com.invalid> - 2012-09-14 00:06 +0200
  Re: Problem with printf-like logging framework and inline hexdumps. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-09-13 21:24 +0100
    Re: Problem with printf-like logging framework and inline hexdumps. Jef Driesen <jefdriesen@hotmail.com.invalid> - 2012-09-13 23:47 +0200
      Re: Problem with printf-like logging framework and inline hexdumps. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-09-13 23:54 +0100
        Re: Problem with printf-like logging framework and inline hexdumps. Jef Driesen <jefdriesen@hotmail.com.invalid> - 2012-09-14 18:31 +0200
          Re: Problem with printf-like logging framework and inline hexdumps. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-09-14 22:02 +0100
            Re: Problem with printf-like logging framework and inline hexdumps. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-09-14 22:49 +0100
              Re: Problem with printf-like logging framework and inline hexdumps. Jef Driesen <jefdriesen@hotmail.com.invalid> - 2012-09-17 07:09 +0200
              Re: Problem with printf-like logging framework and inline hexdumps. Kaz Kylheku <kaz@kylheku.com> - 2012-09-17 06:39 +0000
                Re: Problem with printf-like logging framework and inline hexdumps. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-09-17 13:30 +0100
      Re: Problem with printf-like logging framework and inline hexdumps. Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-09-14 03:29 -0700
        Re: Problem with printf-like logging framework and inline hexdumps. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-09-14 12:01 +0100
  Re: Problem with printf-like logging framework and inline hexdumps. Jef Driesen <jefdriesen@hotmail.com.invalid> - 2012-09-14 22:50 +0200

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