[U-Boot] [PATCH 3/3] ubifs: BUG: Blocks commpressed with zlib

[Mike Frysinger]

On Monday 27 April 2009 15:46:25 Wolfgang Denk wrote:
> In message Mike Frysinger wrote:
> > > > - * We need a wrapper for gunzip() because the parameters are
> > > > + * We need a wrapper for zunzip() because the parameters are
> > > >   * incompatible with the lzo decompressor.
> > > >   */
> > > >  static int gzip_decompress(const unsigned char *in, size_t in_len,
> > > >  			   unsigned char *out, size_t *out_len)
> > > >  {
> > > >  	unsigned long len = in_len;
> > > > -	return gunzip(out, *out_len, (unsigned char *)in, &len);
> > > > +	return zunzip(out, *out_len, (unsigned char *)in, &len, 0, 0);
> > > >  }
> > >
> > > If the only purpose of zunzip() is to be used here, then why do we not
> > > make the parameters fit the intended purpose, thus avoiding an
> > > additional wrapper?
> >
> > not sure i follow ... what do you propose changing ?
>
> The comment above seems to indicate that gzip_decompress() is only
> (?) needed because the zunzip() parameters are incompatible with
> those of the lzo decompressor.
>
> So if we create zunzip() just for this purpose, then why  not  create
> it  in a way that the parameters are compatible with those of the lzo
> decompressor, so we can omit  this  whole  gzip_decompress()  wrapper
> function?

that should be a follow up change, but the wrapper already exists today 
regardless of Ricardo's fixes.  i dont think his changes should be held up to 
address that.

that direction should probably cover:
 - fix gunzip code to use size_t's instead of unsigned long
 - re-order lzo arguments to match zlib rather than other way around since lzo 
has very few consumers
-mike
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