// save OpenGL info to file
long SettingsDialog::onCmdSave(FXObject*, FXSelector, void*)
{
FXString filename = FXFileDialog::getSaveFilename(this, tr("Save Information"), FXSystem::getHomeDirectory()+PATHSEPSTRING+"opengl.txt", tr("Text Files (*.txt)\nAll Files(*.*)"));
if (!filename.empty()) {
if (FXStat::exists(filename)) {
if (FXMessageBox::question(this, MBOX_YES_NO, tr("Overwrite File?"), tr("File %s already exists.\nWould you like to overwrite this file?"), filename.text()) != MBOX_CLICKED_YES)
return 1;
}
if (!saveInformation(filename)) {
FXMessageBox::error(this, MBOX_OK, tr("Write Error"), tr("An error occured trying to write file."));
}
}
return 1;
}
unsigned long readExplicitFile( ifstream& input, unsigned long offset , bool bigEndian , unsigned short target , DicomFileImage& fileInfo )
{
unsigned long currentOffset;
unsigned long size;
unsigned short group;
unsigned short element;
char type[3];
unsigned short lengthShort;
char* value;
bool found;
try
{
currentOffset = offset;
found = false;
type[2] = '\0';
value = NULL;
input.seekg(0,ifstream::end);
size = input.tellg();
input.seekg(offset,ifstream::beg);
while( !input.eof() && ( currentOffset = input.tellg() ) < size )
{
input.read((char*)&group,2); // read group code
input.read((char*)&element,2); // read element code
input.read(type,2); // read value representation
input.read((char*)&lengthShort,2); // for "OB","OW",“OF”,“SQ”,“UT”,"UN" unused , else read Value Length
// if the transfer syntax is Big Endian perform a byte swap
if ( bigEndian )
{
group = _byteswap_ushort(group);
element = _byteswap_ushort(element);
lengthShort = _byteswap_ulong(lengthShort);
}
if ( group == target && !found ) found = true;
else if ( group != target && found ) break;
// if the value representation is one of the following
if ( strcmp(type,"OB") == 0 || strcmp(type,"OW") == 0 ||
strcmp(type,"OF") == 0 || strcmp(type,"SQ") == 0 ||
strcmp(type,"UN") == 0 || strcmp(type,"UT") == 0 )
{
int valueSize;
// read unlimited text
value = readUnlimitedText(input,type,false,bigEndian,&valueSize);
saveInformation(group,element,valueSize,value,fileInfo);
delete[] value;
value = NULL;
}
else
{
if ( lengthShort > 0 )
{
// read data equal to the defined length
value = new char[lengthShort];
input.read(value,lengthShort);
saveInformation(group,element,sizeof(unsigned short),value,fileInfo);
delete[] value;
value = NULL;
}
}
}
}
catch( exception& e )
{
if ( value != NULL )
delete[] value;
throw e;
}
return currentOffset;
};
unsigned long readImplicitFile( ifstream& input , unsigned long offset , bool bigEndian , unsigned short target , DicomFileImage& fileInfo )
{
unsigned long currentOffset;
unsigned long size;
unsigned short group;
unsigned short element;
unsigned int lengthInt;
char* value;
bool found;
try
{
currentOffset = offset;
found = false;
value = NULL;
input.seekg(0,ifstream::end);
size = input.tellg();
input.seekg(offset,ifstream::beg);
while( !input.eof() && ( currentOffset = input.tellg() ) < size )
{
input.read((char*)&group,2); // read group code
input.read((char*)&element,2); // read element code
input.read((char*)&lengthInt,4); // read value length
// if the transfer syntax is Big Endian perform a byte swap
if ( bigEndian )
{
group = _byteswap_ushort(group);
element = _byteswap_ushort(element);
lengthInt = _byteswap_ulong(lengthInt);
}
// termination condition update
if ( group == target && !found ) found = true;
else if ( group != target && found ) break;
// if the length is undefined
if ( lengthInt == 0xFFFFFFFF )
{
int valueSize;
// read unlimited text
value = readUnlimitedText(input,"",true,bigEndian,&valueSize);
// update DicomFileImage information
saveInformation(group,element,valueSize,value,fileInfo);
delete[] value;
value = NULL;
}
else // if the length is defined
{
if ( lengthInt > 0 )
{
// read data of size equal to the defined length
value = new char[lengthInt];
input.read(value,lengthInt);
saveInformation(group,element,sizeof(unsigned short),value,fileInfo);
delete[] value;
value = NULL;
}
}
}
}
catch ( exception &e )
{
if ( value != NULL )
delete[] value;
throw e;
}
return currentOffset;
};
