- * \brief TODO
- * @param Value
- * @param Group
- * @param Elem
- * \return integer acts as a boolean
- */
-int gdcmHeader::ReplaceOrCreateByNumber(std::string Value,
- guint16 Group, guint16 Elem ) {
-
- // TODO : FIXME JPRx
- // curieux, non ?
- // on (je) cree une Elvalue ne contenant pas de valeur
- // on l'ajoute au ElValSet
- // on affecte une valeur a cette ElValue a l'interieur du ElValSet
- // --> devrait pouvoir etre fait + simplement ???
- if (CheckIfExistByNumber(Group, Elem) == 0) {
- gdcmElValue* a =NewElValueByNumber(Group, Elem);
- if (a == NULL)
- return 0;
- PubElValSet.Add(a);
- }
- PubElValSet.SetElValueByNumber(Value, Group, Elem);
- return(1);
-}
-
-
-/**
- * \ingroup gdcmHeader
- * \brief Modify (or Creates if not found) an element
- * @param Value new value
- * @param Group
- * @param Elem
- * \return integer acts as a boolean
- *
- */
-int gdcmHeader::ReplaceOrCreateByNumber(char* Value, guint16 Group, guint16 Elem ) {
-
- gdcmElValue* nvElValue=NewElValueByNumber(Group, Elem);
- PubElValSet.Add(nvElValue);
- std::string v = Value;
- PubElValSet.SetElValueByNumber(v, Group, Elem);
- return(1);
-}
-
-
-/**
- * \ingroup gdcmHeader
- * \brief Set a new value if the invoked element exists
- * @param Value
- * @param Group
- * @param Elem
- * \return integer acts as a boolean
- */
-int gdcmHeader::ReplaceIfExistByNumber(char* Value, guint16 Group, guint16 Elem ) {
-
- gdcmElValue* elValue = PubElValSet.GetElementByNumber(Group, Elem);
- std::string v = Value;
- PubElValSet.SetElValueByNumber(v, Group, Elem);
- return 1;
-}
-
-
-/**
- * \ingroup gdcmHeader
- * \brief Checks if a given ElValue (group,number)
- * \ exists in the Public ElValSet
- * @param Group
- * @param Elem
- * @return integer acts as a boolean
- */
-
-int gdcmHeader::CheckIfExistByNumber(guint16 Group, guint16 Elem ) {
- return (PubElValSet.CheckIfExistByNumber(Group, Elem));
- }
-
-/**
- * \ingroup gdcmHeader
- * \brief Build a new Element Value from all the low level arguments.
- * Check for existence of dictionary entry, and build
- * a default one when absent.
- * @param Name Name of the underlying DictEntry
- */
-gdcmElValue* gdcmHeader::NewElValueByName(std::string Name) {
-
- gdcmDictEntry * NewTag = GetDictEntryByName(Name);
- if (!NewTag)
- NewTag = new gdcmDictEntry(0xffff, 0xffff, "LO", "Unknown", Name);
-
- gdcmElValue* NewElVal = new gdcmElValue(NewTag);
- if (!NewElVal) {
- dbg.Verbose(1, "gdcmHeader::ObtainElValueByName",
- "failed to allocate gdcmElValue");
- return (gdcmElValue*)0;
- }
- return NewElVal;
-}
-
-/**
- * \ingroup gdcmHeader
- * \brief Read the next tag but WITHOUT loading it's value
- * @return On succes the newly created ElValue, NULL on failure.
- */
-gdcmElValue * gdcmHeader::ReadNextElement(void) {
-
- guint16 g,n;
- gdcmElValue * NewElVal;
-
- g = ReadInt16();
- n = ReadInt16();
-
- if (errno == 1)
- // We reached the EOF (or an error occured) and header parsing
- // has to be considered as finished.
- return (gdcmElValue *)0;
-
- NewElVal = NewElValueByNumber(g, n);
- FindVR(NewElVal);
- FindLength(NewElVal);
- if (errno == 1) {
- // Call it quits
- return (gdcmElValue *)0;
- }
- NewElVal->SetOffset(ftell(fp));
- //if ( (g==0x7fe0) && (n==0x0010) )
- return NewElVal;
-}
-
-/**
- * \ingroup gdcmHeader
- * \brief Apply some heuristics to predict wether the considered
- * element value contains/represents an integer or not.
- * @param ElVal The element value on which to apply the predicate.
- * @return The result of the heuristical predicate.
- */
-bool gdcmHeader::IsAnInteger(gdcmElValue * ElVal) {
- guint16 group = ElVal->GetGroup();
- guint16 element = ElVal->GetElement();
- std::string vr = ElVal->GetVR();
- guint32 length = ElVal->GetLength();
-
- // When we have some semantics on the element we just read, and if we
- // a priori know we are dealing with an integer, then we shall be
- // able to swap it's element value properly.
- if ( element == 0 ) { // This is the group length of the group
- if (length == 4)
- return true;
- else {
- dbg.Error("gdcmHeader::IsAnInteger",
- "Erroneous Group Length element length.");
- }
- }
- if ( (vr == "UL") || (vr == "US") || (vr == "SL") || (vr == "SS") )
- return true;
-
- return false;
-}
-
-/**
- * \ingroup gdcmHeader
- * \brief Recover the offset (from the beginning of the file) of the pixels.
- */
-size_t gdcmHeader::GetPixelOffset(void) {
- // If this file complies with the norm we should encounter the
- // "Image Location" tag (0x0028, 0x0200). This tag contains the
- // the group that contains the pixel data (hence the "Pixel Data"
- // is found by indirection through the "Image Location").
- // Inside the group pointed by "Image Location" the searched element
- // is conventionally the element 0x0010 (when the norm is respected).
- // When the "Image Location" is absent we default to group 0x7fe0.
- guint16 grPixel;
- guint16 numPixel;
- std::string ImageLocation = GetPubElValByName("Image Location");
- if ( ImageLocation == GDCM_UNFOUND ) {
- grPixel = 0x7fe0;
- } else {
- grPixel = (guint16) atoi( ImageLocation.c_str() );
- }
- if (grPixel != 0x7fe0)
- // This is a kludge for old dirty Philips imager.
- numPixel = 0x1010;
- else
- numPixel = 0x0010;
-
- gdcmElValue* PixelElement = PubElValSet.GetElementByNumber(grPixel,
- numPixel);
- if (PixelElement)
- return PixelElement->GetOffset();
- else
- return 0;
-}
-
-/**
- * \ingroup gdcmHeader
- * \brief Searches both the public and the shadow dictionary (when they
- * exist) for the presence of the DictEntry with given
- * group and element. The public dictionary has precedence on the
- * shadow one.
- * @param group group of the searched DictEntry
- * @param element element of the searched DictEntry
- * @return Corresponding DictEntry when it exists, NULL otherwise.