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May 2008
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2008.05.31 15:45 "Re: [gdal-dev] Problem with libTiff on Solaris 10", by Even Rouault
And I suspect that the "_TIFFmemcpy(n,&o->tdir_offset,4)" is also bogus as tdir_offset is 64 bit large too. That should be fixed too by the same method : nTemp = (uint32)o->tdir_offset; _Tiffmemcpy(n, &nTemp, 4); Those problems are probably not seen on little endian machines as the first 4 bytes contain the lowest 32 bit word, which is the one we want to put into the n pointer... I'm also wondering why there's not a test to see if it must be swabbed afterwards, as it's done for the tag, type and count fields. Le Saturday 31 May 2008 17:30:11 Even Rouault, vous avez écrit : > Dan, > > Your fix is not the right one. But I recognize that my previous suggestion > could lead into error. > > In fact, tdir_count field is a uint64 in libtiff 4.0. > So the correct fix is : > > uint32 nTemp = (uint32)o->tdir_count; > _Tiffmemcpy(n, &nTemp, 4); > > Even > > --------------------------------------------------------------------------- >-------- > > RE: [Tiff] Re: [gdal-dev] Problem with libTiff on Solaris 10 > De : > Dan Greve <grevedan@hotmail.com> > À : > Bob Friesenhahn <bfriesen@simple.dallas.tx.us>, Even Rouault > <even.rouault@mines-paris.org> > CC : > gdal-dev@lists.osgeo.org, tiff@lists.osgeo.org, Andy Cave > <andy.cave@hamillroad.com>, mailing list <tiff@lists.maptools.org> > Date : > Aujourd'hui 16:49:15 > > Sure enough, the pointer n is not null, and throws a sigsegv fault. Aftern > changing from > > *(uint32*)n=(uint32)o->tdir_count; TO > > _TIFFmemcpy(n, &o->tdir_count, 4) > > The execution passes this point, but where as *(uint32*)n should be 1, it > is 0. This causes errors later in the GDALOpen call on the tiff dataset, > which fails with error "TiffFetchNormalTag:incorrect count for > "SamplesPerPixel". debugging continues.... > > -- Dan Greve > -- Software Engineering > -- Northrop Grumman Corp. > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/gdal-dev