1387 TIFFAdvanceDirectory(TIFF* tif, uint64* nextdir, uint64* off)  in TIFFAdvanceDirectory()  argument
1392 		uint64 poff=*nextdir;  in TIFFAdvanceDirectory()
1403                                   *nextdir=0;  in TIFFAdvanceDirectory()
1421 			*nextdir=nextdir32;  in TIFFAdvanceDirectory()
1453 			_TIFFmemcpy(nextdir,tif->tif_base+poffc,sizeof(uint64));  in TIFFAdvanceDirectory()
1455 				TIFFSwabLong8(nextdir);  in TIFFAdvanceDirectory()
1465 			if (!SeekOK(tif, *nextdir) ||  in TIFFAdvanceDirectory()
1486 			*nextdir=nextdir32;  in TIFFAdvanceDirectory()
1492 			if (!SeekOK(tif, *nextdir) ||  in TIFFAdvanceDirectory()
1512 			if (!ReadOK(tif, nextdir, sizeof (uint64))) {  in TIFFAdvanceDirectory()
1519 				TIFFSwabLong8(nextdir);  in TIFFAdvanceDirectory()
1532 	uint64 nextdir;  in TIFFNumberOfDirectories()  local
1535 		nextdir = tif->tif_header.classic.tiff_diroff;  in TIFFNumberOfDirectories()
1537 		nextdir = tif->tif_header.big.tiff_diroff;  in TIFFNumberOfDirectories()
1539 	while (nextdir != 0 && TIFFAdvanceDirectory(tif, &nextdir, NULL))  in TIFFNumberOfDirectories()
1562 	uint64 nextdir;  in TIFFSetDirectory()  local
1566 		nextdir = tif->tif_header.classic.tiff_diroff;  in TIFFSetDirectory()
1568 		nextdir = tif->tif_header.big.tiff_diroff;  in TIFFSetDirectory()
1569 	for (n = dirn; n > 0 && nextdir != 0; n--)  in TIFFSetDirectory()
1570 		if (!TIFFAdvanceDirectory(tif, &nextdir, NULL))  in TIFFSetDirectory()
1572 	tif->tif_nextdiroff = nextdir;  in TIFFSetDirectory()
1631 	uint64 nextdir;  in TIFFUnlinkDirectory()  local
1647 		nextdir = tif->tif_header.classic.tiff_diroff;  in TIFFUnlinkDirectory()
1652 		nextdir = tif->tif_header.big.tiff_diroff;  in TIFFUnlinkDirectory()
1656 		if (nextdir == 0) {  in TIFFUnlinkDirectory()
1660 		if (!TIFFAdvanceDirectory(tif, &nextdir, &off))  in TIFFUnlinkDirectory()
1667 	if (!TIFFAdvanceDirectory(tif, &nextdir, NULL))  in TIFFUnlinkDirectory()
1678 		nextdir32=(uint32)nextdir;  in TIFFUnlinkDirectory()
1679 		assert((uint64)nextdir32==nextdir);  in TIFFUnlinkDirectory()
1690 			TIFFSwabLong8(&nextdir);  in TIFFUnlinkDirectory()
1691 		if (!WriteOK(tif, &nextdir, sizeof (uint64))) {  in TIFFUnlinkDirectory()