private DvtkCharacterSet GetDvtkCharacterSet(byte[] escapeSequence)
{
// fix for the Japanese character set ISO 2022 IR 13 which has two
// different escape sequences for the GO and G1 code space
// - check for the escape sequence for the G1 code space
if ((escapeSequence[0] == 0x1B) &&
(escapeSequence[1] == 0x29) &&
(escapeSequence[2] == 0x49) &&
(escapeSequence[3] == 0))
{
// swap this to the escape sequence for the G0 code space
escapeSequence[1] = 0x28;
escapeSequence[2] = 0x4A;
}
DvtkCharacterSet dvtkCharacterSet = null;
foreach (DvtkCharacterSet localCharacterSet in _dvtkCharacterSets)
{
// if escape sequence matches then character set has been found
if ((localCharacterSet.Escape1[0] == escapeSequence[0]) &&
(localCharacterSet.Escape1[1] == escapeSequence[1]) &&
(localCharacterSet.Escape1[2] == escapeSequence[2]) &&
(localCharacterSet.Escape1[3] == escapeSequence[3]))
{
dvtkCharacterSet = localCharacterSet;
break;
}
}
return(dvtkCharacterSet);
}
private DvtkCharacterSet GetDvtkCharacterSet(String characterSetName)
{
String localCharacterSetName = characterSetName.Trim();
DvtkCharacterSet dvtkCharacterSet = null;
foreach (DvtkCharacterSet localCharacterSet in _dvtkCharacterSets)
{
// if name matches then character set has been found
if (localCharacterSet.CharacterSetName == localCharacterSetName)
{
dvtkCharacterSet = localCharacterSet;
break;
}
}
return(dvtkCharacterSet);
}
public bool Install(String specificCharacterSetsString)
{
bool result = true;
String[] specificCharacterSets = null;
try
{
// ensure the default character set value is set up
// - if not explicitly defined
if (specificCharacterSetsString == String.Empty)
{
specificCharacterSets = "ISO_IR 6".Split('\\');
}
else
{
specificCharacterSets = specificCharacterSetsString.Split('\\');
if (specificCharacterSets.Length == 0)
{
specificCharacterSets = "ISO_IR 6".Split('\\');
}
else if ((specificCharacterSets.Length > 1) &&
(specificCharacterSets[0] == String.Empty))
{
specificCharacterSets[0] = "ISO_IR 6";
}
}
// trim any padding spaces from the specific character sets values
// - also check to see if the default repertoire with code extensions
// has been defined
bool defaultRepertoireDefined = false;
for (int i = 0; i < specificCharacterSets.Length; i++)
{
String localValue = specificCharacterSets[i].Trim();
_specificCharacterSets.Add(localValue);
if (localValue == "ISO 2022 IR 6")
{
defaultRepertoireDefined = true;
}
}
// add the default repertoire with code extensions if necessary
if (defaultRepertoireDefined == false)
{
_specificCharacterSets.Add("ISO 2022 IR 6");
}
DirectoryInfo directoryInfo = new DirectoryInfo(_characterSetDirectory);
foreach (FileInfo fileInfo in directoryInfo.GetFiles())
{
DvtkCharacterSet dvtkCharacterSet = new DvtkCharacterSet(fileInfo.FullName);
if (dvtkCharacterSet.Read() == true)
{
foreach (String characterSetName in _specificCharacterSets)
{
if (characterSetName == dvtkCharacterSet.CharacterSetName)
{
_dvtkCharacterSets.Add(dvtkCharacterSet);
break;
}
}
}
}
}
catch (System.Exception)
{
result = false;
}
return(result);
}
public UInt16[] Unicode(byte[] dicomString)
{
ArrayList localBuffer = new ArrayList();
try
{
bool isMixedG0G1CharacterSet = false;
DvtkCharacterSet specificCharacterSet0 = (DvtkCharacterSet)GetDvtkCharacterSet((String)_specificCharacterSets[0]);
DvtkCharacterSet currentCharacterSet = (DvtkCharacterSet)GetDvtkCharacterSet((String)_specificCharacterSets[0]);
for (int i = 0; i < dicomString.Length; i++)
{
UInt16 dicomCode = 0;
// check for escape sequences
if (dicomString[i] == 0x1B)
{
byte[] escapeSequence = new byte[] { 0, 0, 0, 0 };
// get the escape sequence from the dicomString
// - try a 3 char escape sequence first
int localIndex = i;
escapeSequence[0] = dicomString[i++];
escapeSequence[1] = dicomString[i++];
escapeSequence[2] = dicomString[i++];
// check if the escape sequence matches a Dvtk character set escape sequence
DvtkCharacterSet nextCharacterSet = GetDvtkCharacterSet(escapeSequence);
if (nextCharacterSet == null)
{
// try with the 4 char escape sequence
escapeSequence[3] = dicomString[i++];
nextCharacterSet = GetDvtkCharacterSet(escapeSequence);
}
if (nextCharacterSet != null)
{
// switch the current character set to the next one
currentCharacterSet = nextCharacterSet;
// set the isMixed boolean
// - this indicates if the current Character Set can be mixed
// with the specificCharacterSet0 in the G0 code space and
// the current Character Set in the G1 code space.
isMixedG0G1CharacterSet = nextCharacterSet.IsMixed;
}
else
{
// failed to translate the escape sequence
// - reset the index to the beginning of the escape sequence and continue
// - escape sequence will simply be translated into unicode in the current character set
i = localIndex;
}
if (i == dicomString.Length)
{
continue;
}
}
// check if the escaped character set is a mixed one in the G1 code space that requires
// the use of the specificCharacterSet0 in the G0 code space (ie 7 bit chars)
if ((isMixedG0G1CharacterSet == true) &&
(dicomString[i] < 128))
{
// create single byte dicom code
dicomCode = (UInt16)dicomString[i];
// add the converted Unicode char from the specificCharacterSet0 character set
localBuffer.Add(specificCharacterSet0.DicomToUnicode(dicomCode));
}
else if (currentCharacterSet.IsMultiByte == true)
{
// check on the number of bytes per character in the current character set
// create multi-byte dicom code
dicomCode = (UInt16)((dicomString[i] * 256) + dicomString[i + 1]);
i++;
// add the converted Unicode multi-byte char from the current character set
localBuffer.Add(currentCharacterSet.DicomToUnicode(dicomCode));
}
else
{
// create single byte dicom code
dicomCode = (UInt16)dicomString[i];
// add the converted Unicode char from the current character set
localBuffer.Add(currentCharacterSet.DicomToUnicode(dicomCode));
}
}
}
catch (System.Exception)
{
}
// convert the local buffer into the returned UInt16 array
UInt16[] unicode = new UInt16[localBuffer.Count];
for (int i = 0; i < localBuffer.Count; i++)
{
unicode[i] = (UInt16)localBuffer[i];
}
return(unicode);
}
public bool Install(String specificCharacterSetsString)
{
bool result = true;
String[] specificCharacterSets = null;
try
{
// ensure the default character set value is set up
// - if not explicitly defined
if (specificCharacterSetsString == String.Empty)
{
specificCharacterSets = "ISO_IR 6".Split('\\');
}
else
{
specificCharacterSets = specificCharacterSetsString.Split('\\');
if (specificCharacterSets.Length == 0)
{
specificCharacterSets = "ISO_IR 6".Split('\\');
}
else if ((specificCharacterSets.Length > 1) &&
(specificCharacterSets[0] == String.Empty))
{
specificCharacterSets[0] = "ISO_IR 6";
}
}
// trim any padding spaces from the specific character sets values
// - also check to see if the default repertoire with code extensions
// has been defined
bool defaultRepertoireDefined = false;
for (int i = 0; i < specificCharacterSets.Length; i++)
{
String localValue = specificCharacterSets[i].Trim();
_specificCharacterSets.Add(localValue);
if (localValue == "ISO 2022 IR 6")
{
defaultRepertoireDefined = true;
}
}
// add the default repertoire with code extensions if necessary
if (defaultRepertoireDefined == false)
{
_specificCharacterSets.Add("ISO 2022 IR 6");
}
DirectoryInfo directoryInfo = new DirectoryInfo(_characterSetDirectory);
foreach (FileInfo fileInfo in directoryInfo.GetFiles())
{
DvtkCharacterSet dvtkCharacterSet = new DvtkCharacterSet(fileInfo.FullName);
if (dvtkCharacterSet.Read() == true)
{
foreach (String characterSetName in _specificCharacterSets)
{
if (characterSetName == dvtkCharacterSet.CharacterSetName)
{
_dvtkCharacterSets.Add(dvtkCharacterSet);
break;
}
}
}
}
}
catch (System.Exception)
{
result = false;
}
return result;
}
