1371 TIFFAdvanceDirectory(TIFF* tif, uint64* nextdir, uint64* off)  in TIFFAdvanceDirectory()  argument
1376 		uint64 poff=*nextdir;  in TIFFAdvanceDirectory()
1387                                   *nextdir=0;  in TIFFAdvanceDirectory()
1405 			*nextdir=nextdir32;  in TIFFAdvanceDirectory()
1437 			_TIFFmemcpy(nextdir,tif->tif_base+poffc,sizeof(uint64));  in TIFFAdvanceDirectory()
1439 				TIFFSwabLong8(nextdir);  in TIFFAdvanceDirectory()
1449 			if (!SeekOK(tif, *nextdir) ||  in TIFFAdvanceDirectory()
1470 			*nextdir=nextdir32;  in TIFFAdvanceDirectory()
1476 			if (!SeekOK(tif, *nextdir) ||  in TIFFAdvanceDirectory()
1496 			if (!ReadOK(tif, nextdir, sizeof (uint64))) {  in TIFFAdvanceDirectory()
1503 				TIFFSwabLong8(nextdir);  in TIFFAdvanceDirectory()
1516 	uint64 nextdir;  in TIFFNumberOfDirectories()  local
1519 		nextdir = tif->tif_header.classic.tiff_diroff;  in TIFFNumberOfDirectories()
1521 		nextdir = tif->tif_header.big.tiff_diroff;  in TIFFNumberOfDirectories()
1523 	while (nextdir != 0 && TIFFAdvanceDirectory(tif, &nextdir, NULL))  in TIFFNumberOfDirectories()
1546 	uint64 nextdir;  in TIFFSetDirectory()  local
1550 		nextdir = tif->tif_header.classic.tiff_diroff;  in TIFFSetDirectory()
1552 		nextdir = tif->tif_header.big.tiff_diroff;  in TIFFSetDirectory()
1553 	for (n = dirn; n > 0 && nextdir != 0; n--)  in TIFFSetDirectory()
1554 		if (!TIFFAdvanceDirectory(tif, &nextdir, NULL))  in TIFFSetDirectory()
1556 	tif->tif_nextdiroff = nextdir;  in TIFFSetDirectory()
1615 	uint64 nextdir;  in TIFFUnlinkDirectory()  local
1631 		nextdir = tif->tif_header.classic.tiff_diroff;  in TIFFUnlinkDirectory()
1636 		nextdir = tif->tif_header.big.tiff_diroff;  in TIFFUnlinkDirectory()
1640 		if (nextdir == 0) {  in TIFFUnlinkDirectory()
1644 		if (!TIFFAdvanceDirectory(tif, &nextdir, &off))  in TIFFUnlinkDirectory()
1651 	if (!TIFFAdvanceDirectory(tif, &nextdir, NULL))  in TIFFUnlinkDirectory()
1662 		nextdir32=(uint32)nextdir;  in TIFFUnlinkDirectory()
1663 		assert((uint64)nextdir32==nextdir);  in TIFFUnlinkDirectory()
1674 			TIFFSwabLong8(&nextdir);  in TIFFUnlinkDirectory()
1675 		if (!WriteOK(tif, &nextdir, sizeof (uint64))) {  in TIFFUnlinkDirectory()