# Re: Polaroid SprintScan 35 LE

From: Henning Meier-Geinitz (henning@meier-geinitz.de)
Date: Mon May 21 2001 - 12:43:53 PDT

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  Hi,

  On Mon, May 21, 2001 at 02:22:14PM -0400, Matto Marjanovic wrote:
  > * Use DBG(...) instead of fprintf(stderr, ...) or printf
  > - microtek
  >
  > --> this is not so simple.
  > There are a lot of places where I used 'fprintf(stderr, ...)'
  > in order to produce readable output; usually, such code is
  > conditioned off of DBG_LEVEL like so (per an early discussion
  > with David Mosberger-Tang on the right way to do this):
  >
  > if (DBG_LEVEL >= 192) {
  > int i;
  > fprintf(stderr, "MSL: ");
  > for (i=0;i<6+comm[4];i++) fprintf(stderr, "%2x ", comm[i]);
  > fprintf(stderr, "\n");
  > }
  >
  > There is no way to produce readable output using DBG(...) in a
  > situation like this, because of all the stuff that DBG() prepends
  > and appends to its arguments.
  >
  > Any suggestions?
  > Perhaps an additional, raw form of DBG(...) ?

  I'm using strings together with sprintf and strcat and after creation
  of the output string I print it with DBG(level, "%s", string). It's
  one or two more lines of code but I think it's worth it because we
  don't get problems with saned this way. So in your example:

  int i;
  char *dbg_buffer[enough_mem];
  char *tmp_buffer[not_so_much_mem];
  sprintf(tmp_buffer, "MSL: ");
  strcat(dbg_buffer, tmp_buffer);
  for (i=0;i<6+comm[4];i++)
  {
  sprintf(tmp_buffer, "%2x ", comm[i]);
  strcat(dbg_buffer, tmp_buffer);
  }

  (untested and ugly but you may get the idea).

  Bye,
  Henning

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