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DcmDataset Class Reference

a class handling the DICOM dataset format (files without meta header) More...

Inheritance diagram for DcmDataset:

## Public Member Functions

| DcmDataset ()
| default constructor
| DcmDataset (const DcmDataset &old)
| copy constructor
virtual | ~DcmDataset ()
| destructor
DcmDataset & | operator= (const DcmDataset &obj)
| assignment operator
virtual DcmObject * | clone () const
| clone method
virtual OFCondition | copyFrom (const DcmObject &rhs)
| Virtual object copying.
virtual DcmEVR | ident () const
| get type identifier
virtual OFCondition | clear ()
| clear (remove) attribute value
virtual void | removeInvalidGroups (const OFBool cmdSet=OFFalse)
| remove all elements with an invalid group number, i.e.
E_TransferSyntax | getOriginalXfer () const
| return the transfer syntax in which this dataset was originally read or created.
E_TransferSyntax | getCurrentXfer () const
| return the current transfer syntax, i.e. the one that was last used with chooseRepresentation() in order to select a specific representation or with write() or writeSignatureFormat() in order to create a byte stream according to the DICOM encoding rules.
virtual void | updateOriginalXfer ()
| update the original transfer syntax, e.g. in case the dataset was created in memory and pixel data was added with a particular representation.
virtual void | print (STD_NAMESPACE ostream &out, const size_t flags=0, const int level=0, const char *pixelFileName=NULL, size_t *pixelCounter=NULL)
| print all elements of the dataset to a stream
Uint32 | calcElementLength (const E_TransferSyntax xfer, const E_EncodingType enctype)
| calculate the length of this DICOM element when encoded with the given transfer syntax and the given encoding type for sequences.
virtual OFBool | canWriteXfer (const E_TransferSyntax newXfer, const E_TransferSyntax oldXfer=EXS_Unknown)
| check if this DICOM object can be encoded in the given transfer syntax.
virtual OFCondition | read (DcmInputStream &inStream, const E_TransferSyntax xfer=EXS_Unknown, const E_GrpLenEncoding glenc=EGL_noChange, const Uint32 maxReadLength=DCM_MaxReadLength)
| This function reads the information of all attributes which are captured in the input stream and captures this information in this->elementList.
virtual OFCondition | readUntilTag (DcmInputStream &inStream, const E_TransferSyntax xfer=EXS_Unknown, const E_GrpLenEncoding glenc=EGL_noChange, const Uint32 maxReadLength=DCM_MaxReadLength, const DcmTagKey &stopParsingAtElement=DCM_UndefinedTagKey)
| This function reads the information of all attributes which are captured in the input stream and captures this information in this->elementList, up to the attribute tag stopParsingAtElement.
virtual OFCondition | write (DcmOutputStream &outStream, const E_TransferSyntax oxfer, const E_EncodingType enctype, DcmWriteCache *wcache)
| write dataset to a stream
virtual OFCondition | write (DcmOutputStream &outStream, const E_TransferSyntax oxfer, const E_EncodingType enctype, DcmWriteCache *wcache, const E_GrpLenEncoding glenc, const E_PaddingEncoding padenc=EPD_noChange, const Uint32 padlen=0, const Uint32 subPadlen=0, Uint32 instanceLength=0)
| This function writes data values which are contained in this DcmDataset object to the stream which is passed as first argument.
virtual OFCondition | writeSignatureFormat (DcmOutputStream &outStream, const E_TransferSyntax oxfer, const E_EncodingType enctype, DcmWriteCache *wcache)
| special write method for creation of digital signatures
virtual OFCondition | writeXML (STD_NAMESPACE ostream &out, const size_t flags=0)
| write object in XML format.
virtual OFCondition | writeJson (STD_NAMESPACE ostream &out, DcmJsonFormat &format)
| write object in JSON format.
virtual OFCondition | loadFile (const OFFilename &fileName, const E_TransferSyntax readXfer=EXS_Unknown, const E_GrpLenEncoding groupLength=EGL_noChange, const Uint32 maxReadLength=DCM_MaxReadLength)
| load object from a DICOM file.
virtual OFCondition | loadFileUntilTag (const OFFilename &fileName, const E_TransferSyntax readXfer=EXS_Unknown, const E_GrpLenEncoding groupLength=EGL_noChange, const Uint32 maxReadLength=DCM_MaxReadLength, const DcmTagKey &stopParsingAtElement=DCM_UndefinedTagKey)
| load object from a DICOM file, up to the attribute tag stopParsingAtElement.
virtual OFCondition | saveFile (const OFFilename &fileName, const E_TransferSyntax writeXfer=EXS_Unknown, const E_EncodingType encodingType=EET_UndefinedLength, const E_GrpLenEncoding groupLength=EGL_recalcGL, const E_PaddingEncoding padEncoding=EPD_noChange, const Uint32 padLength=0, const Uint32 subPadLength=0)
| save object to a DICOM file.
OFCondition | chooseRepresentation (const E_TransferSyntax repType, const DcmRepresentationParameter *repParam)
| select a specific representation (compressed or uncompressed) of the dataset and create the representation if needed.
OFBool | hasRepresentation (const E_TransferSyntax repType, const DcmRepresentationParameter *repParam)
| check if all PixelData elements in this dataset have a representation conforming to the given transfer syntax and representation parameters (see dcpixel.h for definition of "conforming").
void | removeAllButOriginalRepresentations ()
| removes all but the original representation in all pixel data elements
void | removeAllButCurrentRepresentations ()
| removes all but the current representation and sets the original representation to current
virtual OFBool | checkForSpecificCharacterSet () const
| mode specifying whether the SpecificCharacterSet (0008,0005) element should be checked by convertCharacterSet() or not, i.e. whether this element might be present on this dataset-level.
void | initializeXfer (const E_TransferSyntax xfer)
| initialize the OriginalXfer and CurrentXfer member variables.
Public Member Functions inherited from DcmItem
| DcmItem ()
| default constructor
| DcmItem (const DcmTag &tag, const Uint32 len=0)
| constructor.
| DcmItem (const DcmItem &old)
| copy constructor
DcmItem & | operator= (const DcmItem &obj)
| assignment operator.
virtual int | compare (const DcmItem &rhs) const
| comparison operator that compares the value of this object with a given object of the same type.
virtual | ~DcmItem ()
| destructor
virtual unsigned long | getVM ()
| get value multiplicity
virtual unsigned long | getNumberOfValues ()
| get number of values (elements) stored in this item.
virtual unsigned long | card () const
| get cardinality of this item
virtual OFBool | isLeaf () const
| check if this element is a leaf node in a dataset tree.
virtual OFBool | isNested () const
| check if this item is nested in a sequence of items, i.e. not a top-level or stand-alone item/dataset
virtual Uint32 | getLength (const E_TransferSyntax xfer=EXS_LittleEndianImplicit, const E_EncodingType enctype=EET_UndefinedLength)
| calculate the value length (without attribute tag, VR and length field) of this DICOM element when encoded with the given transfer syntax and the given encoding type for sequences.
virtual void | transferInit ()
| initialize the transfer state of this object.
virtual void | transferEnd ()
| finalize the transfer state of this object.
virtual DcmItem * | getParentItem ()
| get parent item of this object, i.e. the item/dataset in which the surrounding sequence element is stored.
virtual OFCondition | writeJsonExt (STD_NAMESPACE ostream &out, DcmJsonFormat &format, OFBool printBraces, OFBool printNewline)
| write object in JSON format and control whether the output is encapsulated in braces
virtual OFBool | containsUnknownVR () const
| returns true if the object contains an element with Unknown VR at any nesting level
virtual OFBool | containsExtendedCharacters (const OFBool checkAllStrings=OFFalse)
| check if this object contains non-ASCII characters at any nesting level.
virtual OFBool | isAffectedBySpecificCharacterSet () const
| check if this object is affected by SpecificCharacterSet at any nesting level.
virtual OFCondition | convertCharacterSet (const OFString &fromCharset, const OFString &toCharset, const size_t flags=0, const OFBool updateCharset=OFFalse)
| convert all element values that are contained in this item and that are affected by SpecificCharacterSet from the given source character set to the given destination character set.
virtual OFCondition | convertCharacterSet (const OFString &toCharset, const size_t flags=0, const OFBool ignoreCharset=OFFalse)
| convert all element values that are contained in this item and that are affected by SpecificCharacterSet to the given destination character set.
virtual OFCondition | convertCharacterSet (DcmSpecificCharacterSet &converter)
| convert all element values that are contained in this item and that are affected by SpecificCharacterSet from the currently selected source character set to the currently selected destination character set.
virtual OFCondition | convertToUTF8 ()
| convert all element values that are contained in this item and that are affected by SpecificCharacterSet to UTF-8 (Unicode).
virtual void | updateSpecificCharacterSet (OFCondition &status, const DcmSpecificCharacterSet &converter)
| update the SpecificCharacterSet (0008,0005) element depending on the given parameters.
virtual OFCondition | insert (DcmElement *elem, OFBool replaceOld=OFFalse, OFBool checkInsertOrder=OFFalse)
| insert a new element into the list of elements maintained by this item.
virtual DcmElement * | getElement (const unsigned long num)
| access an element from the item.
virtual OFCondition | nextObject (DcmStack &stack, const OFBool intoSub)
| this method enables a stack based, depth-first traversal of a complete hierarchical DICOM dataset (that is, classes derived from DcmItem or DcmSequenceOfItems).
virtual DcmObject * | nextInContainer (const DcmObject *obj)
| this method is only used in container classes, that is, DcmItem and DcmSequenceOfItems.
virtual DcmElement * | remove (const unsigned long num)
| remove element from list.
virtual DcmElement * | remove (DcmObject *elem)
| remove element from list.
virtual DcmElement * | remove (const DcmTagKey &tag)
| remove element from list.
virtual OFBool | isEmpty (const OFBool normalize=OFTrue)
| check if this item is empty
virtual OFCondition | verify (const OFBool autocorrect=OFFalse)
| check the currently stored element value
virtual OFCondition | search (const DcmTagKey &xtag, DcmStack &resultStack, E_SearchMode mode=ESM_fromHere, OFBool searchIntoSub=OFTrue)
| a complex, stack-based, hierarchical search method.
virtual OFCondition | loadAllDataIntoMemory ()
| this method loads all attribute values maintained by this object and all sub-objects (in case of a container such as DcmDataset) into memory.
virtual void | compactElements (const Uint32 maxLength)
| iterate over all elements and remove those element values from memory which exceed a given length and which can be loaded from file when needed again.
virtual OFCondition | computeGroupLengthAndPadding (const E_GrpLenEncoding glenc, const E_PaddingEncoding padenc=EPD_noChange, const E_TransferSyntax xfer=EXS_Unknown, const E_EncodingType enctype=EET_ExplicitLength, const Uint32 padlen=0, const Uint32 subPadlen=0, Uint32 instanceLength=0)
| This function takes care of group length and padding elements in the current element list according to what is specified in glenc and padenc.
OFBool | tagExists (const DcmTagKey &key, OFBool searchIntoSub=OFFalse)
| check if an element with the given attribute tag exists in the dataset
OFBool | tagExistsWithValue (const DcmTagKey &key, OFBool searchIntoSub=OFFalse)
| check if an element with the given attribute tag exists in the dataset and has a non-empty value
OFCondition | findAndGetElement (const DcmTagKey &tagKey, DcmElement *&element, const OFBool searchIntoSub=OFFalse, const OFBool createCopy=OFFalse)
| find element and get a pointer to it (or copy it).
OFCondition | findAndGetElements (const DcmTagKey &tagKey, DcmStack &resultStack)
| find all elements matching a particular tag and return references to them on a stack.
OFCondition | findAndGetString (const DcmTagKey &tagKey, const char *&value, const OFBool searchIntoSub=OFFalse)
| find element and get value as a reference to a C string.
OFCondition | findAndGetString (const DcmTagKey &tagKey, const char *&value, Uint32 &length, const OFBool searchIntoSub=OFFalse)
| find element and get value as a reference to a C string.
OFCondition | findAndGetOFString (const DcmTagKey &tagKey, OFString &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
| find element and get value as a C++ string (only one component).
OFCondition | findAndGetOFStringArray (const DcmTagKey &tagKey, OFString &value, const OFBool searchIntoSub=OFFalse)
| find element and get value as a C++ string (all components).
OFCondition | findAndGetUint8 (const DcmTagKey &tagKey, Uint8 &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
| find element and get value as an unsigned 8-bit integer.
OFCondition | findAndGetUint8Array (const DcmTagKey &tagKey, const Uint8 *&value, unsigned long *count=NULL, const OFBool searchIntoSub=OFFalse)
| find element and get value as an array of unsigned 8-bit integers.
OFCondition | findAndGetUint16 (const DcmTagKey &tagKey, Uint16 &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
| find element and get value as an unsigned 16-bit integer.
OFCondition | findAndGetUint16Array (const DcmTagKey &tagKey, const Uint16 *&value, unsigned long *count=NULL, const OFBool searchIntoSub=OFFalse)
| find element and get value as an array of unsigned 16-bit integers.
OFCondition | findAndGetSint16 (const DcmTagKey &tagKey, Sint16 &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
| find element and get value as a signed 16-bit integer.
OFCondition | findAndGetSint16Array (const DcmTagKey &tagKey, const Sint16 *&value, unsigned long *count=NULL, const OFBool searchIntoSub=OFFalse)
| find element and get value as an array of signed 16-bit integers.
OFCondition | findAndGetUint32 (const DcmTagKey &tagKey, Uint32 &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
| find element and get value as an unsigned 32-bit integer.
OFCondition | findAndGetUint32Array (const DcmTagKey &tagKey, const Uint32 *&value, unsigned long *count=NULL, const OFBool searchIntoSub=OFFalse)
| find element and get value as an array of unsigned 32-bit integers.
OFCondition | findAndGetSint32 (const DcmTagKey &tagKey, Sint32 &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
| find element and get value as a signed 32-bit integer.
OFCondition | findAndGetSint32Array (const DcmTagKey &tagKey, const Sint32 *&value, unsigned long *count=NULL, const OFBool searchIntoSub=OFFalse)
| find element and get value as an array of signed 32-bit integers.
OFCondition | findAndGetUint64 (const DcmTagKey &tagKey, Uint64 &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
| find element and get value as an unsigned 64-bit integer.
OFCondition | findAndGetUint64Array (const DcmTagKey &tagKey, const Uint64 *&value, unsigned long *count=NULL, const OFBool searchIntoSub=OFFalse)
| find element and get value as an array of unsigned 64-bit integers.
OFCondition | findAndGetSint64 (const DcmTagKey &tagKey, Sint64 &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
| find element and get value as a signed 64-bit integer.
OFCondition | findAndGetSint64Array (const DcmTagKey &tagKey, const Sint64 *&value, unsigned long *count=NULL, const OFBool searchIntoSub=OFFalse)
| find element and get value as an array of signed 64-bit integers.
OFCondition | findAndGetLongInt (const DcmTagKey &tagKey, long int &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
| find element and get value as a (signed) long integer.
OFCondition | findAndGetFloat32 (const DcmTagKey &tagKey, Float32 &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
| find element and get value as a 32-bit floating point.
OFCondition | findAndGetFloat32Array (const DcmTagKey &tagKey, const Float32 *&value, unsigned long *count=NULL, const OFBool searchIntoSub=OFFalse)
| find element and get value as an array of 32-bit floating point values.
OFCondition | findAndGetFloat64 (const DcmTagKey &tagKey, Float64 &value, const unsigned long pos=0, const OFBool searchIntoSub=OFFalse)
| find element and get value as a 64-bit floating point.
OFCondition | findAndGetFloat64Array (const DcmTagKey &tagKey, const Float64 *&value, unsigned long *count=NULL, const OFBool searchIntoSub=OFFalse)
| find element and get value as an array of 64-bit floating point values.
OFCondition | findAndGetSequence (const DcmTagKey &seqTagKey, DcmSequenceOfItems *&sequence, const OFBool searchIntoSub=OFFalse, const OFBool createCopy=OFFalse)
| looks up and returns a given sequence.
OFCondition | findAndGetSequenceItem (const DcmTagKey &seqTagKey, DcmItem *&item, const signed long itemNum=0, const OFBool createCopy=OFFalse)
| looks up and returns a given sequence item, if it exists.
OFCondition | findOrCreateSequenceItem (const DcmTag &seqTag, DcmItem *&item, const signed long itemNum=0)
| looks up the given sequence in the current dataset and returns the given item.
OFCondition | findAndInsertCopyOfElement (const DcmTagKey &tagKey, DcmItem *destItem, const OFBool replaceOld=OFTrue)
| find element, create a copy and insert it into the given destination dataset.
OFCondition | findAndDeleteElement (const DcmTagKey &tagKey, const OFBool allOccurrences=OFFalse, const OFBool searchIntoSub=OFFalse)
| find element, remove it from the dataset and free the associated memory.
OFCondition | findAndDeleteSequenceItem (const DcmTagKey &seqTagKey, const signed long itemNum)
| looks up the given sequence in the current dataset and deletes the given item.
OFCondition | putAndInsertString (const DcmTag &tag, const char *value, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertString (const DcmTag &tag, const char *value, const Uint32 length, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertOFStringArray (const DcmTag &tag, const OFString &value, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertUint8Array (const DcmTag &tag, const Uint8 *value, const unsigned long count, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertUint16 (const DcmTag &tag, const Uint16 value, const unsigned long pos=0, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertUint16Array (const DcmTag &tag, const Uint16 *value, const unsigned long count, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertSint16 (const DcmTag &tag, const Sint16 value, const unsigned long pos=0, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertSint16Array (const DcmTag &tag, const Sint16 *value, const unsigned long count, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertUint32 (const DcmTag &tag, const Uint32 value, const unsigned long pos=0, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertUint32Array (const DcmTag &tag, const Uint32 *value, const unsigned long count, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertSint32 (const DcmTag &tag, const Sint32 value, const unsigned long pos=0, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertSint32Array (const DcmTag &tag, const Sint32 *value, const unsigned long count, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertUint64 (const DcmTag &tag, const Uint64 value, const unsigned long pos=0, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertUint64Array (const DcmTag &tag, const Uint64 *value, const unsigned long count, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertSint64 (const DcmTag &tag, const Sint64 value, const unsigned long pos=0, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertSint64Array (const DcmTag &tag, const Sint64 *value, const unsigned long count, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertFloat32 (const DcmTag &tag, const Float32 value, const unsigned long pos=0, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertFloat32Array (const DcmTag &tag, const Float32 *value, const unsigned long count, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertFloat64 (const DcmTag &tag, const Float64 value, const unsigned long pos=0, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertFloat64Array (const DcmTag &tag, const Float64 *value, const unsigned long count, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | putAndInsertTagKey (const DcmTag &tag, const DcmTagKey &value, const unsigned long pos=0, const OFBool replaceOld=OFTrue)
| create a new element, put specified value to it and insert the element into the dataset/item.
OFCondition | insertEmptyElement (const DcmTag &tag, const OFBool replaceOld=OFTrue)
| create a new element (with no value) and insert it into the dataset/item.
OFCondition | insertSequenceItem (const DcmTag &seqTag, DcmItem *item, const signed long itemNum=-2)
| looks up the given sequence in the current dataset and inserts the given item.
Public Member Functions inherited from DcmObject
| DcmObject (const DcmTag &tag, const Uint32 len=0)
| constructor.
| DcmObject (const DcmObject &obj)
| copy constructor
virtual | ~DcmObject ()
| destructor
DcmObject & | operator= (const DcmObject &obj)
| copy assignment operator
DcmEVR | getVR () const
| return the value representation assigned to this object.
OFBool | isaString () const
| check if this element is a string type, based on the VR.
virtual OFBool | isElement () const
| check if this element can be safely casted to DcmElement
E_TransferState | transferState () const
| return the current transfer (read/write) state of this object.
DcmItem * | getRootItem ()
| get root dataset/item (top-level) that contains this object.
DcmObject * | getParent ()
| get parent of this object.
const DcmObject * | getParent () const
| get parent of this object.
void | setParent (DcmObject *parent)
| set parent of this object.
Uint16 | getGTag () const
| return the group number of the attribute tag for this object
Uint16 | getETag () const
| return the element number of the attribute tag for this object
const DcmTag & | getTag () const
| return const reference to the attribute tag for this object
void | setGTag (Uint16 gtag)
| assign group tag (but not element tag) of the attribute tag for this object.
virtual OFCondition | setVR (DcmEVR vr)
| assign a new Value Representation (VR) to this object.
virtual OFBool | isSignable () const
| returns true if the current object may be included in a digital signature
Uint32 | getLengthField () const
| return the current value of the Length field (which is different from the functionality of the public getLength() method).

## Protected Member Functions

OFCondition | doPostReadChecks ()
| perform checks after reading of the dataset is considered complete.
Protected Member Functions inherited from DcmItem
OFCondition | readTagAndLength (DcmInputStream &inStream, const E_TransferSyntax xfer, DcmTag &tag, Uint32 &length, Uint32 &bytesRead)
| This function reads tag and length information from inStream and returns this information to the caller.
OFCondition | readSubElement (DcmInputStream &inStream, DcmTag &newTag, const Uint32 newLength, const E_TransferSyntax xfer, const E_GrpLenEncoding glenc, const Uint32 maxReadLength=DCM_MaxReadLength)
| This function creates a new DcmElement object on the basis of the newTag and newLength information which was passed, inserts this new element into elementList, reads the actual data value which belongs to this element (attribute) from the inStream and also assigns this information to the object which was created at the beginning.
E_TransferSyntax | checkTransferSyntax (DcmInputStream &inStream)
| This function reads the first 6 bytes from the input stream and determines the transfer syntax which was used to code the information in the stream.
OFBool | checkAndUpdateVR (DcmItem &item, DcmTag &tag)
| check whether the given tag requires some special handling regarding the VR (i.e. in case it is undefined and multiple values are possible).
Protected Member Functions inherited from DcmObject
void | printNestingLevel (STD_NAMESPACE ostream &out, const size_t flags, const int level)
| print line indentation, e.g. a couple of spaces for each nesting level.
void | printInfoLineStart (STD_NAMESPACE ostream &out, const size_t flags, const int level, DcmTag *tag=NULL)
| print beginning of the info line.
void | printInfoLineEnd (STD_NAMESPACE ostream &out, const size_t flags, const unsigned long printedLength=0xffffffff, DcmTag *tag=NULL)
| print end of the info line.
virtual void | printInfoLine (STD_NAMESPACE ostream &out, const size_t flags, const int level=0, const char *info=NULL, DcmTag *tag=NULL, const OFBool isInfo=OFTrue)
| print given text with element information.
virtual OFCondition | writeTagAndLength (DcmOutputStream &outStream, const E_TransferSyntax oxfer, Uint32 &writtenBytes) const
| write tag, VR and length field to the given output stream
virtual Uint32 | getTagAndLengthSize (const E_TransferSyntax oxfer) const
| return the number of bytes needed to serialize the tag, VR and length information of the current object using the given transfer syntax.
const char * | getTagName ()
| return the DICOM attribute tag name for this object.
void | setTagVR (DcmEVR vr)
| set the VR for this attribute
E_TransferState | getTransferState () const
| return the current transfer state of this object during serialization/deserialization
void | setTransferState (E_TransferState newState)
| set the current transfer state of this object during serialization/deserialization
Uint32 | getTransferredBytes () const
| return the number of transferred bytes for this object during serialization/deserialization
void | setTransferredBytes (Uint32 val)
| set the number of transferred bytes for this object during serialization/deserialization
void | incTransferredBytes (Uint32 val)
| add to the number of transferred bytes for this object during serialization/deserialization
void | setLengthField (Uint32 val)
| set the current value of the Length field

## Private Attributes

E_TransferSyntax | OriginalXfer
| original transfer syntax of the dataset
E_TransferSyntax | CurrentXfer
| current transfer syntax of the dataset

## Additional Inherited Members

Static Public Member Functions inherited from DcmItem
static DcmElement * | newDicomElement (const DcmTagKey &tag, const char *privateCreator=NULL)
| creates new DICOM element from given attribute tag.
static OFCondition | newDicomElement (DcmElement *&newElement, const DcmTagKey &tag, const char *privateCreator=NULL)
| creates new DICOM element from given attribute tag.
static OFCondition | newDicomElementWithVR (DcmElement *&newElement, const DcmTag &tag)
| creates new DICOM element from given attribute tag and VR.
Static Protected Member Functions inherited from DcmItem
static OFCondition | newDicomElement (DcmElement *&newElement, DcmTag &tag, const Uint32 length, DcmPrivateTagCache *privateCreatorCache, OFBool &readAsUN)
| creates new DICOM element from given attribute tag.
Static Protected Member Functions inherited from DcmObject
static OFCondition | writeTag (DcmOutputStream &outStream, const DcmTag &tag, const E_TransferSyntax oxfer)
| static helper function that writes a given attribute tag to a binary output stream using the byte order indicated by the transfer syntax.
Protected Attributes inherited from DcmItem
DcmList * | elementList
| the list of elements maintained by this object
OFBool | lastElementComplete
| flag used during suspended I/O.
offile_off_t | fStartPosition
| used during reading.
Protected Attributes inherited from DcmObject
OFCondition | errorFlag
| error flag for this object.

## Detailed Description

a class handling the DICOM dataset format (files without meta header)

## Constructor & Destructor Documentation

## DcmDataset()

DcmDataset::DcmDataset | ( | const DcmDataset & | old | ) |

copy constructor

Parameters

  old | dataset to be copied

References DcmDataset().

## Member Function Documentation

## calcElementLength()

Uint32 DcmDataset::calcElementLength | ( | const E_TransferSyntax | xfer,
|  | const E_EncodingType | enctype )

virtual

calculate the length of this DICOM element when encoded with the given transfer syntax and the given encoding type for sequences.

For elements, the length includes the length of the tag, length field, VR field and the value itself, for items and sequences it returns the length of the complete item or sequence including delimitation tags if applicable.

Warning
  Since calcElementLength() returns a 32 bit integer, an overflow during calculation is possible for some derived classes that actually represent a compound value (e.g. items like DcmPixelItem). Such overflows will be detected, in which case the maximum possible value will be returned instead, coinciding with DCM_UndefinedLength.
  The implementation in DcmPixelData may return zero if no conforming representation exists and set the EC_RepresentationNotFound error flag to indicated it.
  When calculation the length of a sequence or an item containing multiple attributes, the implementation may return DCM_UndefinedLength to indicate a value that can not be encoded as a 32 bit length field. It will even do so if "dcmWriteOversizedSeqsAndItemsUndefined" is disabled, but then also set the EC_SeqOrItemContentOverflow error flag (inside getLength()) to indicated it.

Note
  Just check for zero or DCM_UndefinedLength return value and then have a look at the error flag in either case.

Parameters

  xfer | transfer syntax for length calculation
  enctype | sequence encoding type for length calculation

Returns
  length of DICOM element

Reimplemented from DcmItem.

## canWriteXfer()

virtual OFBool DcmDataset::canWriteXfer | ( | const E_TransferSyntax | newXfer,
|  | const E_TransferSyntax | oldXfer = EXS_Unknown )

virtual

check if this DICOM object can be encoded in the given transfer syntax.

Parameters

  newXfer | transfer syntax in which the DICOM object is to be encoded
  oldXfer | transfer syntax in which the DICOM object was read or created (optional). If EXS_Unknown, the return value of getOriginalXfer() is used.

Returns
  true if object can be encoded in desired transfer syntax, false otherwise.

Reimplemented from DcmItem.

References EXS_Unknown.

## checkForSpecificCharacterSet()

virtual OFBool DcmDataset::checkForSpecificCharacterSet | ( |  | ) | const

inline virtual

mode specifying whether the SpecificCharacterSet (0008,0005) element should be checked by convertCharacterSet() or not, i.e. whether this element might be present on this dataset-level.

Returns
  always returns OFTrue, i.e. SpecificCharacterSet should be checked

Reimplemented from DcmItem.

## chooseRepresentation()

OFCondition DcmDataset::chooseRepresentation | ( | const E_TransferSyntax | repType,
|  | const DcmRepresentationParameter * | repParam )

select a specific representation (compressed or uncompressed) of the dataset and create the representation if needed.

This may cause compression or decompression to be applied to the pixel data in the dataset.

Parameters

  repType | desired transfer syntax
  repParam | desired representation parameter (e.g. quality factor for lossy compression)

Returns
  EC_Normal upon success, an error code otherwise.

## clear()

virtual OFCondition DcmDataset::clear | ( |  | ) |

virtual

clear (remove) attribute value

Returns
  EC_Normal if successful, an error code otherwise

Reimplemented from DcmItem.

## clone()

virtual DcmObject * DcmDataset::clone | ( |  | ) | const

inline virtual

clone method

Returns
  deep copy of this object

Reimplemented from DcmItem.

References DcmDataset(), and DcmObject::DcmObject().

## copyFrom()

virtual OFCondition DcmDataset::copyFrom | ( | const DcmObject & | rhs | ) |

virtual

Virtual object copying.

This method can be used for DcmObject and derived classes to get a deep copy of an object. Internally the assignment operator is called if the given DcmObject parameter is of the same type as "this" object instance. If not, an error is returned. This function permits copying an object by value in a virtual way which therefore is different to just calling the assignment operator of DcmElement which could result in slicing the object.

Parameters

  rhs | - [in] The instance to copy from. Has to be of the same class type as "this" object

Returns
  EC_Normal if copying was successful, error otherwise

Reimplemented from DcmItem.

References DcmObject::DcmObject().

## doPostReadChecks()

OFCondition DcmDataset::doPostReadChecks | ( |  | ) |

protected

perform checks after reading of the dataset is considered complete.

The idea is that some checks cannot be performed when reading a specific element, for different reasons, e.g. the values of other elements have to be taken into account.

Returns
  status, EC_Normal if no problems are found, an error code otherwise

## getCurrentXfer()

E_TransferSyntax DcmDataset::getCurrentXfer | ( |  | ) | const

return the current transfer syntax, i.e. the one that was last used with chooseRepresentation() in order to select a specific representation or with write() or writeSignatureFormat() in order to create a byte stream according to the DICOM encoding rules.

The default value is the transfer syntax in which this dataset was originally read (see getOriginalXfer()) or, if this dataset was created from memory, the explicit VR with local endianness. Please note that the current transfer syntax might also change after calling updateOriginalXfer().

Returns
  transfer syntax in which this dataset is currently stored (see above)

## getOriginalXfer()

E_TransferSyntax DcmDataset::getOriginalXfer | ( |  | ) | const

return the transfer syntax in which this dataset was originally read or created.

See updateOriginalXfer() on how to update this value when created in memory.

Returns
  transfer syntax in which this dataset was originally read. Might be EXS_Unknown if the dataset was created in memory.

## hasRepresentation()

OFBool DcmDataset::hasRepresentation | ( | const E_TransferSyntax | repType,
|  | const DcmRepresentationParameter * | repParam )

check if all PixelData elements in this dataset have a representation conforming to the given transfer syntax and representation parameters (see dcpixel.h for definition of "conforming").

Parameters

  repType | desired transfer syntax
  repParam | desired representation parameter (e.g. quality factor for lossy compression)

Returns
  true if all pixel elements have the desired representation, false otherwise

## ident()

virtual DcmEVR DcmDataset::ident | ( |  | ) | const

virtual

get type identifier

Returns
  type identifier of this class (EVR_dataset)

Reimplemented from DcmItem.

## initializeXfer()

void DcmDataset::initializeXfer | ( | const E_TransferSyntax | xfer | ) |

initialize the OriginalXfer and CurrentXfer member variables.

This method sets the values for OriginalXfer (i.e. the transfer syntax in which a dataset is or was originally read) and CurrentXfer (i.e. the currently active transfer syntax). The method should only be called during import operations.

Parameters

  xfer | new value for OriginalXfer and CurrentXfer

## loadFile()

virtual OFCondition DcmDataset::loadFile | ( | const OFFilename & | fileName,
|  | const E_TransferSyntax | readXfer = EXS_Unknown,
|  | const E_GrpLenEncoding | groupLength = EGL_noChange,
|  | const Uint32 | maxReadLength = DCM_MaxReadLength )

virtual

load object from a DICOM file.

This method only supports DICOM objects stored as a dataset, i.e. without meta header. Use DcmFileFormat::loadFile() to load files with meta header.

Parameters

  fileName | name of the file to load (may contain wide chars if support enabled). Since there are various constructors for the OFFilename class, a "char *", "OFString" or "wchar_t *" can also be passed directly to this parameter.
  readXfer | transfer syntax used to read the data (auto detection if EXS_Unknown)
  groupLength | flag, specifying how to handle the group length tags
  maxReadLength | maximum number of bytes to be read for an element value. Element values with a larger size are not loaded until their value is retrieved (with getXXX()) or loadAllDataIntoMemory() is called.

Returns
  status, EC_Normal if successful, an error code otherwise

References EGL_noChange, and EXS_Unknown.

## loadFileUntilTag()

virtual OFCondition DcmDataset::loadFileUntilTag | ( | const OFFilename & | fileName,
|  | const E_TransferSyntax | readXfer = EXS_Unknown,
|  | const E_GrpLenEncoding | groupLength = EGL_noChange,
|  | const Uint32 | maxReadLength = DCM_MaxReadLength,
|  | const DcmTagKey & | stopParsingAtElement = DCM_UndefinedTagKey )

virtual

load object from a DICOM file, up to the attribute tag stopParsingAtElement.

This method only supports DICOM objects stored as a dataset, i.e. without meta header. Use DcmFileFormat::loadFile() to load files with meta header.

Parameters

  fileName | name of the file to load (may contain wide chars if support enabled). Since there are various constructors for the OFFilename class, a "char *", "OFString" or "wchar_t *" can also be passed directly to this parameter.
  readXfer | transfer syntax used to read the data (auto detection if EXS_Unknown)
  groupLength | flag, specifying how to handle the group length tags
  maxReadLength | maximum number of bytes to be read for an element value. Element values with a larger size are not loaded until their value is retrieved (with getXXX()) or loadAllDataIntoMemory() is called.
  stopParsingAtElement | parsing of the input stream is stopped when this tag key or any higher tag is encountered.

Returns
  status, EC_Normal if successful, an error code otherwise

References EGL_noChange, and EXS_Unknown.

## operator=()

DcmDataset & DcmDataset::operator= | ( | const DcmDataset & | obj | ) |

assignment operator

Parameters

  obj | the dataset to be copied

Returns
  reference to this object

References DcmDataset().

## print()

virtual void DcmDataset::print | ( | STD_NAMESPACE ostream & | out,
|  | const size_t | flags = 0,
|  | const int | level = 0,
|  | const char * | pixelFileName = NULL,
|  | size_t * | pixelCounter = NULL )

virtual

print all elements of the dataset to a stream

Parameters

  out | output stream
  flags | optional flag used to customize the output (see DCMTypes::PF_xxx)
  level | current level of nested items. Used for indentation.
  pixelFileName | optional filename used to write the raw pixel data file
  pixelCounter | optional counter used for automatic pixel data filename creation

Reimplemented from DcmItem.

## read()

virtual OFCondition DcmDataset::read | ( | DcmInputStream & | inStream,
|  | const E_TransferSyntax | xfer = EXS_Unknown,
|  | const E_GrpLenEncoding | glenc = EGL_noChange,
|  | const Uint32 | maxReadLength = DCM_MaxReadLength )

virtual

This function reads the information of all attributes which are captured in the input stream and captures this information in this->elementList.

Each attribute is represented as an element in this list. Having read all information for this particular data set or command, this function will also take care of group length (according to what is specified in glenc) and padding elements (don't change anything).

Parameters

  inStream | The stream which contains the information.
  xfer | The transfer syntax which was used to encode the information in inStream.
  glenc | Encoding type for group length; specifies what will be done with group length tags.
  maxReadLength | Maximum read length for reading an attribute value.

Returns
  status, EC_Normal if successful, an error code otherwise

Reimplemented from DcmItem.

References EGL_noChange, and EXS_Unknown.

## readUntilTag()

virtual OFCondition DcmDataset::readUntilTag | ( | DcmInputStream & | inStream,
|  | const E_TransferSyntax | xfer = EXS_Unknown,
|  | const E_GrpLenEncoding | glenc = EGL_noChange,
|  | const Uint32 | maxReadLength = DCM_MaxReadLength,
|  | const DcmTagKey & | stopParsingAtElement = DCM_UndefinedTagKey )

virtual

This function reads the information of all attributes which are captured in the input stream and captures this information in this->elementList, up to the attribute tag stopParsingAtElement.

Each attribute is represented as an element in this list. Having read all information for this particular data set or command, this function will also take care of group length (according to what is specified in glenc) and padding elements (don't change anything).

Parameters

  inStream | The stream which contains the information.
  xfer | The transfer syntax which was used to encode the information in inStream.
  glenc | Encoding type for group length; specifies what will be done with group length tags.
  maxReadLength | Maximum read length for reading an attribute value.
  stopParsingAtElement | parsing of the input stream is stopped when this tag key or any higher tag is encountered.

Returns
  status, EC_Normal if successful, an error code otherwise

Reimplemented from DcmItem.

References EGL_noChange, and EXS_Unknown.

## removeInvalidGroups()

virtual void DcmDataset::removeInvalidGroups | ( | const OFBool | cmdSet = OFFalse | ) |

virtual

remove all elements with an invalid group number, i.e.

0x0000 to 0x0003, 0x0005, 0x0007 and 0xFFFF in case of a data set. For sequence items, also group 0x0006 is disallowed. For command sets, only group 0x0000 is allowed, i.e. the elements from all other groups are removed.

Parameters

  cmdSet | specifies whether this object represents a command or data set

## saveFile()

virtual OFCondition DcmDataset::saveFile | ( | const OFFilename & | fileName,
|  | const E_TransferSyntax | writeXfer = EXS_Unknown,
|  | const E_EncodingType | encodingType = EET_UndefinedLength,
|  | const E_GrpLenEncoding | groupLength = EGL_recalcGL,
|  | const E_PaddingEncoding | padEncoding = EPD_noChange,
|  | const Uint32 | padLength = 0,
|  | const Uint32 | subPadLength = 0 )

virtual

save object to a DICOM file.

This method only supports DICOM objects stored as a dataset, i.e. without meta header. Use DcmFileFormat::saveFile() to save files with meta header.

Parameters

  fileName | name of the file to save (may contain wide chars if support enabled). Since there are various constructors for the OFFilename class, a "char *", "OFString" or "wchar_t *" can also be passed directly to this parameter.
  writeXfer | transfer syntax used to write the data (EXS_Unknown means use original)
  encodingType | flag, specifying the encoding with undefined or explicit length
  groupLength | flag, specifying how to handle the group length tags
  padEncoding | flag, specifying how to handle the padding tags
  padLength | number of bytes used for the dataset padding (has to be an even number)
  subPadLength | number of bytes used for the item padding (has to be an even number)

Returns
  status, EC_Normal if successful, an error code otherwise

References EET_UndefinedLength, EGL_recalcGL, EPD_noChange, and EXS_Unknown.

## updateOriginalXfer()

virtual void DcmDataset::updateOriginalXfer | ( |  | ) |

virtual

update the original transfer syntax, e.g. in case the dataset was created in memory and pixel data was added with a particular representation.

Icon images and other nested pixel data elements are not checked. If previously unknown, the original transfer syntax is set to the default EXS_LittleEndianExplicit. Please note that the current transfer syntax might also be updated if its value was not in sync with the internal representation of the pixel data.

## write() [1/2]

virtual OFCondition DcmDataset::write | ( | DcmOutputStream & | outStream,
|  | const E_TransferSyntax | oxfer,
|  | const E_EncodingType | enctype,
|  | DcmWriteCache * | wcache )

virtual

write dataset to a stream

Parameters

  outStream | DICOM output stream
  oxfer | output transfer syntax (EXS_Unknown means use original)
  enctype | encoding types (undefined or explicit length)
  wcache | pointer to write cache object, may be NULL

Returns
  status, EC_Normal if successful, an error code otherwise

Reimplemented from DcmItem.

## write() [2/2]

virtual OFCondition DcmDataset::write | ( | DcmOutputStream & | outStream,
|  | const E_TransferSyntax | oxfer,
|  | const E_EncodingType | enctype,
|  | DcmWriteCache * | wcache,
|  | const E_GrpLenEncoding | glenc,
|  | const E_PaddingEncoding | padenc = EPD_noChange,
|  | const Uint32 | padlen = 0,
|  | const Uint32 | subPadlen = 0,
|  | Uint32 | instanceLength = 0 )

virtual

This function writes data values which are contained in this DcmDataset object to the stream which is passed as first argument.

With regard to the writing of information, the other parameters which are passed are accounted for. The function will return EC_Normal, if the information from all elements of this data set has been written to the buffer, it will return EC_StreamNotifyClient, if there is no more space in the buffer and not all elements have been written to it, and it will return some other (error) value if there was an error.

Parameters

  outStream | The stream that the information will be written to.
  oxfer | The transfer syntax which shall be used (EXS_Unknown means use original).
  enctype | Encoding type for sequences; specifies how sequences will be handled.
  wcache | pointer to write cache object, may be NULL
  glenc | Encoding type for group length; specifies what will be done with group length tags.
  padenc | Encoding type for padding. Specifies what will be done with padding tags.
  padlen | The length up to which the dataset shall be padded, if padding is desired.
  subPadlen | For sequences (ie sub elements), the length up to which item shall be padded, if padding is desired.
  instanceLength | Number of extra bytes added to the item/dataset length used when computing the padding; this parameter is for instance used to pass the length of the file meta header from the DcmFileFormat to the DcmDataset object.

Returns
  status, EC_Normal if successful, an error code otherwise

References EPD_noChange.

## writeJson()

virtual OFCondition DcmDataset::writeJson | ( | STD_NAMESPACE ostream & | out,
|  | DcmJsonFormat & | format )

virtual

write object in JSON format.

Parameters

  out | output stream to which the JSON document is written
  format | used to format and customize the output

Returns
  status, EC_Normal if successful, an error code otherwise

Reimplemented from DcmItem.

## writeSignatureFormat()

virtual OFCondition DcmDataset::writeSignatureFormat | ( | DcmOutputStream & | outStream,
|  | const E_TransferSyntax | oxfer,
|  | const E_EncodingType | enctype,
|  | DcmWriteCache * | wcache )

virtual

special write method for creation of digital signatures

Parameters

  outStream | DICOM output stream
  oxfer | output transfer syntax (EXS_Unknown means use original)
  enctype | encoding types (undefined or explicit length)
  wcache | pointer to write cache object, may be NULL

Returns
  status, EC_Normal if successful, an error code otherwise

Reimplemented from DcmItem.

## writeXML()

virtual OFCondition DcmDataset::writeXML | ( | STD_NAMESPACE ostream & | out,
|  | const size_t | flags = 0 )

virtual

write object in XML format.

The XML declaration (e.g. <?xml version="1.0"?>) is not written by this function.

Parameters

  out | output stream to which the XML document is written
  flags | optional flag used to customize the output (see DCMTypes::XF_xxx)

Returns
  status, EC_Normal if successful, an error code otherwise

Reimplemented from DcmItem.

The documentation for this class was generated from the following file:

- dcmdata/include/dcmtk/dcmdata/dcdatset.h

Generated on for DCMTK Version 3.7.0 by Doxygen 1.15.0