public TiffEntry(ref FileMap f, UInt32 offset, UInt32 up_offset)
{
parent_offset = up_offset;
own_data = null;
empty_data = 0;
file = f;
type = TiffDataType.TIFF_UNDEFINED; // We set type to undefined to avoid debug assertion errors.
byte[] temp_data = f.getData(offset, 8);
tag = (TiffTag)Common.get4LEget2LE(temp_data, 0);
type = (TiffDataType)Common.get4LEget2LE(temp_data, 2);
count = Common.get4LE(temp_data, 4);
bytesize = (UInt64)count << (int)Data.datashifts[(int)type];
if (bytesize > UInt32.MaxValue)
{
TiffParserException.ThrowTPE("TIFF entry is supposedly " + bytesize + " bytes");
}
if (bytesize == 0) // Better return empty than null-dereference later
{
data = (byte8 *)&empty_data;
}
else if (bytesize <= 4)
{
data = fgetDataWrt(offset + 8, bytesize);
}
else
{ // offset
data_offset = get4LE(f.getData(offset + 8, 4), 0);
fetchData();
}
}
TiffEntryBE(ref FileMap f, UInt32 offset, UInt32 up_offset)
{
parent_offset = up_offset;
own_data = null;
empty_data = 0;
file = f;
type = TiffDataType.TIFF_UNDEFINED; // We set type to undefined to avoid debug assertion errors.
byte[] temp_data = f.getData(offset, 8);
tag = (TiffTag)get2BE(temp_data, 0);
type = (TiffDataType)get2BE(temp_data, 2);
count = get4BE(temp_data, 4);
if ((int)type > 13)
{
TiffParserException.ThrowTPE("Error reading TIFF structure. Unknown Type " + type + " encountered.");
}
bytesize = (UInt64)count << (int)Data.datashifts[(int)type];
if (bytesize > UInt32.MaxValue)
{
TiffParserException.ThrowTPE("TIFF entry is supposedly " + bytesize + " bytes");
}
if (bytesize == 0) // Better return empty than null-dereference later
{
data = empty_data;
}
else if (bytesize <= 4)
{
data = f.getDataWrt(offset + 8, bytesize);
}
else
{ // offset
data_offset = get4BE(f.getData(offset + 8, 4), 0);
data = f.getDataWrt(data_offset, bytesize);
}
}
TiffIFD(ref FileMap f, UInt32 offset, UInt32 _depth)
{
TIFF_DEPTH(_depth);
mFile = f;
ushort[] entries;
entries = *(ushort*)f.getData(offset, 2); // Directory entries in this IFD
for (UInt32 i = 0; i < entries; i++)
{
int entry_offset = (int)(offset + 2 + i * 12);
// If the space for the entry is no longer valid stop reading any more as
// the file is broken or truncated
if (!mFile.isValid(entry_offset, 12))
break;
TiffEntry t = null;
try
{
t = new TiffEntry(f, entry_offset, offset);
}
catch (IOException)
{ // Ignore unparsable entry
continue;
}
switch (t.tag)
{
case DNGPRIVATEDATA:
{
try
{
TiffIFD* maker_ifd = parseDngPrivateData(t);
mSubIFD.push_back(maker_ifd);
delete(t);
}
catch (TiffParserException)
{ // Unparsable private data are added as entries
mEntry[t.tag] = t;
}
catch (IOException)
{ // Unparsable private data are added as entries
mEntry[t.tag] = t;
}
}
break;
case MAKERNOTE:
case MAKERNOTE_ALT:
{
try
{
mSubIFD.push_back(parseMakerNote(f, t.getDataOffset(), endian));
delete(t);
}
catch (TiffParserException)
{ // Unparsable makernotes are added as entries
mEntry[t.tag] = t;
}
catch (IOException)
{ // Unparsable makernotes are added as entries
mEntry[t.tag] = t;
}
}
break;
case FUJI_RAW_IFD:
if (t.type == 0xd) // FUJI - correct type
t.type = TIFF_LONG;
case SUBIFDS:
case EXIFIFDPOINTER:
try
{
for (UInt32 j = 0; j < t.count; j++)
{
mSubIFD.push_back(new TiffIFD(f, t.getInt(j), depth));
}
delete(t);
}
catch (TiffParserException)
{ // Unparsable subifds are added as entries
mEntry[t.tag] = t;
}
catch (IOException)
{ // Unparsable subifds are added as entries
mEntry[t.tag] = t;
}
break;
default:
mEntry[t.tag] = t;
}
}
nextIFD = *(align1_int*)f.getData(offset + 2 + entries * 12, 4);
}
