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();
}
}
void TIFF_DEPTH(uint _depth)
{
depth = _depth + 1;
if ((depth) > 10)
{
TiffParserException.ThrowTPE("TIFF: sub-micron matryoshka dolls are ignored");
}
}
bool isTiffSameAsHost(ref UInt16[] tifftag)
{
Endianness host = Common.getHostEndianness();
if (tifftag[0] == 0x4949)
return Endianness.little == host;
if (tifftag[0] == 0x4d4d)
return Endianness.big == host;
TiffParserException.ThrowTPE("Unknown Tiff Byteorder :" + tifftag[0]);
return false;
}
float getFloat(UInt32 num)
{
if (!isFloat())
{
TiffParserException.ThrowTPE("TIFF, getFloat: Wrong type " + type + " encountered. Expected Float or something convertible on " + tag);
}
if (type == TiffDataType.TIFF_DOUBLE)
{
if (num * 8 + 7 >= bytesize)
{
TiffParserException.ThrowTPE("TIFF, getFloat: Trying to read out of bounds");
}
return((float)get8LE(data, num * 8));
}
else if (type == TiffDataType.TIFF_FLOAT)
{
if (num * 4 + 3 >= bytesize)
{
TiffParserException.ThrowTPE("TIFF, getFloat: Trying to read out of bounds");
}
return((float)get4LE(data, num * 4));
}
else if (type == TiffDataType.TIFF_LONG || type == TiffDataType.TIFF_SHORT)
{
return((float)getInt(num));
}
else if (type == TiffDataType.TIFF_SLONG || type == TiffDataType.TIFF_SSHORT)
{
return((float)getSInt(num));
}
else if (type == TiffDataType.TIFF_RATIONAL)
{
UInt32 a = getInt(num * 2);
UInt32 b = getInt(num * 2 + 1);
if (b != 0)
{
return((float)a / b);
}
}
else if (type == TiffDataType.TIFF_SRATIONAL)
{
int a = (int)getInt(num * 2);
int b = (int)getInt(num * 2 + 1);
if (b != 0)
{
return((float)a / b);
}
}
return(0.0f);
}
Int16 getSShort(UInt32 num)
{
if (type != TiffDataType.TIFF_SSHORT && type != TiffDataType.TIFF_UNDEFINED)
{
TiffParserException.ThrowTPE("TIFF, getSShort: Wrong type " + type + " encountered. Expected Short or Undefined on " + tag);
}
if (num * 2 + 1 >= bytesize)
{
TiffParserException.ThrowTPE("TIFF, getSShort: Trying to read out of bounds");
}
return((Int16)get2LE(data, num * 2));
}
byte getByte(UInt32 num)
{
if (type != TiffDataType.TIFF_BYTE)
{
TiffParserException.ThrowTPE("TIFF, getByte: Wrong type " + type + " encountered. Expected Byte on " + tag);
}
if (num >= bytesize)
{
TiffParserException.ThrowTPE("TIFF, getByte: Trying to read out of bounds");
}
return(data[num]);
}
unsafe void setData(void *in_data, UInt32 byte_count)
{
UInt32 bytesize = count << (int)Data.datashifts[(int)type];
if (byte_count > bytesize)
{
TiffParserException.ThrowTPE("TIFF, data set larger than entry size given");
}
if (own_data == null)
{
own_data = new byte[bytesize];
memcpy(own_data, data, bytesize);
}
memcpy(own_data, in_data, byte_count);
}
Int32 getSInt(UInt32 num)
{
if (type == TiffDataType.TIFF_SSHORT)
{
return(getSShort(num));
}
if (!(type == TiffDataType.TIFF_SLONG || type == TiffDataType.TIFF_UNDEFINED))
{
TiffParserException.ThrowTPE("TIFF, getSInt: Wrong type " + type + " encountered. Expected SLong or Undefined on " + tag);
}
if (num * 4 + 3 >= bytesize)
{
TiffParserException.ThrowTPE("TIFF, getSInt: Trying to read out of bounds");
}
return(get4LE(data, num * 4));
}
UInt32 getInt(UInt32 num)
{
if (type == TiffDataType.TIFF_SHORT)
{
return(getShort(num));
}
if (!(type == TiffDataType.TIFF_LONG || type == TiffDataType.TIFF_OFFSET || type == TiffDataType.TIFF_BYTE || type == TiffDataType.TIFF_UNDEFINED ||
type == TiffDataType.TIFF_RATIONAL || type == TiffDataType.TIFF_SRATIONAL))
{
TiffParserException.ThrowTPE("TIFF, getInt: Wrong type " + type + " encountered. Expected Long, Offset, Rational or Undefined on " + tag);
}
if (num * 4 + 3 >= bytesize)
{
TiffParserException.ThrowTPE("TIFF, getInt: Trying to read out of bounds");
}
return(get4LE(data, num * 4));
}
unsafe string getString()
{
if (type != TiffDataType.TIFF_ASCII && type != TiffDataType.TIFF_BYTE)
{
TiffParserException.ThrowTPE("TIFF, getString: Wrong type " + type + " encountered. Expected Ascii or Byte");
}
if (count == 0)
{
return("");
}
if (own_data == null)
{
own_data = new byte[count];
memcpy(own_data, data, count);
own_data[count - 1] = 0; // Ensure string is not larger than count defines
}
return(new String((char *)own_data[0]));
}
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);
}
}