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src/Source/LibTIFF4/tif_dirread.c  view on Meta::CPAN

static enum TIFFReadDirEntryErr TIFFReadDirEntryCheckRangeLong8Sshort(int16 value);
static enum TIFFReadDirEntryErr TIFFReadDirEntryCheckRangeLong8Slong(int32 value);
static enum TIFFReadDirEntryErr TIFFReadDirEntryCheckRangeLong8Slong8(int64 value);

static enum TIFFReadDirEntryErr TIFFReadDirEntryCheckRangeSlong8Long8(uint64 value);

static enum TIFFReadDirEntryErr TIFFReadDirEntryData(TIFF* tif, uint64 offset, tmsize_t size, void* dest);
static void TIFFReadDirEntryOutputErr(TIFF* tif, enum TIFFReadDirEntryErr err, const char* module, const char* tagname, int recover);

static void TIFFReadDirectoryCheckOrder(TIFF* tif, TIFFDirEntry* dir, uint16 dircount);
static TIFFDirEntry* TIFFReadDirectoryFindEntry(TIFF* tif, TIFFDirEntry* dir, uint16 dircount, uint16 tagid);
static void TIFFReadDirectoryFindFieldInfo(TIFF* tif, uint16 tagid, uint32* fii);

static int EstimateStripByteCounts(TIFF* tif, TIFFDirEntry* dir, uint16 dircount);
static void MissingRequired(TIFF*, const char*);
static int TIFFCheckDirOffset(TIFF* tif, uint64 diroff);
static int CheckDirCount(TIFF*, TIFFDirEntry*, uint32);
static uint16 TIFFFetchDirectory(TIFF* tif, uint64 diroff, TIFFDirEntry** pdir, uint64* nextdiroff);
static int TIFFFetchNormalTag(TIFF*, TIFFDirEntry*, int recover);
static int TIFFFetchStripThing(TIFF* tif, TIFFDirEntry* dir, uint32 nstrips, uint64** lpp);
static int TIFFFetchSubjectDistance(TIFF*, TIFFDirEntry*);
static void ChopUpSingleUncompressedStrip(TIFF*);

src/Source/LibTIFF4/tif_dirread.c  view on Meta::CPAN

		{
			TIFFWarningExt(tif->tif_clientdata,module,
			    "Invalid TIFF directory; tags are not sorted in ascending order");
			break;
		}
		m=o->tdir_tag+1;
	}
}

static TIFFDirEntry*
TIFFReadDirectoryFindEntry(TIFF* tif, TIFFDirEntry* dir, uint16 dircount, uint16 tagid)
{
	TIFFDirEntry* m;
	uint16 n;
	(void) tif;
	for (m=dir, n=0; n<dircount; m++, n++)
	{
		if (m->tdir_tag==tagid)
			return(m);
	}
	return(0);
}

static void
TIFFReadDirectoryFindFieldInfo(TIFF* tif, uint16 tagid, uint32* fii)
{
	int32 ma,mb,mc;
	ma=-1;
	mc=(int32)tif->tif_nfields;
	while (1)
	{
		if (ma+1==mc)
		{
			*fii = FAILED_FII;
			return;
		}
		mb=(ma+mc)/2;
		if (tif->tif_fields[mb]->field_tag==(uint32)tagid)
			break;
		if (tif->tif_fields[mb]->field_tag<(uint32)tagid)
			ma=mb;
		else
			mc=mb;
	}
	while (1)
	{
		if (mb==0)
			break;
		if (tif->tif_fields[mb-1]->field_tag!=(uint32)tagid)
			break;
		mb--;
	}
	*fii=mb;
}

/*
 * Read custom directory from the arbitarry offset.
 * The code is very similar to TIFFReadDirectory().
 */