1443 TIFFAdvanceDirectory(TIFF* tif, uint64* nextdir, uint64* off)  in TIFFAdvanceDirectory()  argument
1448 		uint64 poff=*nextdir;  in TIFFAdvanceDirectory()
1459                                   *nextdir=0;  in TIFFAdvanceDirectory()
1477 			*nextdir=nextdir32;  in TIFFAdvanceDirectory()
1509 			_TIFFmemcpy(nextdir,tif->tif_base+poffc,sizeof(uint64));  in TIFFAdvanceDirectory()
1511 				TIFFSwabLong8(nextdir);  in TIFFAdvanceDirectory()
1521 			if (!SeekOK(tif, *nextdir) ||  in TIFFAdvanceDirectory()
1542 			*nextdir=nextdir32;  in TIFFAdvanceDirectory()
1548 			if (!SeekOK(tif, *nextdir) ||  in TIFFAdvanceDirectory()
1568 			if (!ReadOK(tif, nextdir, sizeof (uint64))) {  in TIFFAdvanceDirectory()
1575 				TIFFSwabLong8(nextdir);  in TIFFAdvanceDirectory()
1588 	uint64 nextdir;  in TIFFNumberOfDirectories()  local
1591 		nextdir = tif->tif_header.classic.tiff_diroff;  in TIFFNumberOfDirectories()
1593 		nextdir = tif->tif_header.big.tiff_diroff;  in TIFFNumberOfDirectories()
1595 	while (nextdir != 0 && TIFFAdvanceDirectory(tif, &nextdir, NULL))  in TIFFNumberOfDirectories()
1618 	uint64 nextdir;  in TIFFSetDirectory()  local
1622 		nextdir = tif->tif_header.classic.tiff_diroff;  in TIFFSetDirectory()
1624 		nextdir = tif->tif_header.big.tiff_diroff;  in TIFFSetDirectory()
1625 	for (n = dirn; n > 0 && nextdir != 0; n--)  in TIFFSetDirectory()
1626 		if (!TIFFAdvanceDirectory(tif, &nextdir, NULL))  in TIFFSetDirectory()
1628 	tif->tif_nextdiroff = nextdir;  in TIFFSetDirectory()
1687 	uint64 nextdir;  in TIFFUnlinkDirectory()  local
1703 		nextdir = tif->tif_header.classic.tiff_diroff;  in TIFFUnlinkDirectory()
1708 		nextdir = tif->tif_header.big.tiff_diroff;  in TIFFUnlinkDirectory()
1712 		if (nextdir == 0) {  in TIFFUnlinkDirectory()
1716 		if (!TIFFAdvanceDirectory(tif, &nextdir, &off))  in TIFFUnlinkDirectory()
1723 	if (!TIFFAdvanceDirectory(tif, &nextdir, NULL))  in TIFFUnlinkDirectory()
1734 		nextdir32=(uint32)nextdir;  in TIFFUnlinkDirectory()
1735 		assert((uint64)nextdir32==nextdir);  in TIFFUnlinkDirectory()
1746 			TIFFSwabLong8(&nextdir);  in TIFFUnlinkDirectory()
1747 		if (!WriteOK(tif, &nextdir, sizeof (uint64))) {  in TIFFUnlinkDirectory()