2 //-----------------------------------------------------------------------------
4 #include "gdcmDocument.h"
5 #include "gdcmValEntry.h"
6 #include "gdcmBinEntry.h"
7 #include "gdcmSeqEntry.h"
9 #include "gdcmGlobal.h"
11 #include "gdcmDebug.h"
20 #include <netinet/in.h>
25 #define UI1_2_840_10008_1_2 "1.2.840.10008.1.2"
26 #define UI1_2_840_10008_1_2_1 "1.2.840.10008.1.2.1"
27 #define UI1_2_840_10008_1_2_2 "1.2.840.10008.1.2.2"
28 #define UI1_2_840_10008_1_2_1_99 "1.2.840.10008.1.2.1.99"
29 #define UI1_1_2_840_10008_1_2_5 "1.2.840.10008.1.2.5"
31 #define str2num(str, typeNum) *((typeNum *)(str))
33 //-----------------------------------------------------------------------------
34 // Refer to gdcmDocument::CheckSwap()
35 const unsigned int gdcmDocument::HEADER_LENGTH_TO_READ = 256;
37 // Refer to gdcmDocument::SetMaxSizeLoadEntry()
38 const unsigned int gdcmDocument::MAX_SIZE_LOAD_ELEMENT_VALUE = 4096;
40 const unsigned int gdcmDocument::MAX_SIZE_PRINT_ELEMENT_VALUE = 64;
42 //-----------------------------------------------------------------------------
43 // Constructor / Destructor
47 * @param inFilename file to be opened for parsing
48 * @param exception_on_error whether we throw an exception or not
49 * @param enable_sequences = true to allow the header
50 * to be parsed *inside* the SeQuences,
51 * when they have an actual length
52 * \warning enable_sequences *has to be* true for reading PAPYRUS 3.0 files
53 * @param ignore_shadow to allow skipping the shadow elements,
54 * to save memory space.
55 * \warning The TRUE value for this param has to be used
56 * with a FALSE value for the 'enable_sequence' param.
57 * ('public elements' may be embedded in 'shadow Sequences')
59 gdcmDocument::gdcmDocument(const char *inFilename,
60 bool exception_on_error,
61 bool enable_sequences,
63 : gdcmElementSet(-1) {
64 enableSequences=enable_sequences;
65 ignoreShadow =ignore_shadow;
67 SetMaxSizeLoadEntry(MAX_SIZE_LOAD_ELEMENT_VALUE);
68 filename = inFilename;
71 if ( !OpenFile(exception_on_error))
76 // return false; // to go on compiling
78 fseek(fp,0L,SEEK_END);
88 long l=ParseDES( this, beg, lgt, false); // le Load sera fait a la volee
91 // --------------------------------------------------------------
92 // Special Patch to allow gdcm to read ACR-LibIDO formated images
94 // if recognition code tells us we deal with a LibIDO image
95 // we switch lineNumber and columnNumber
98 RecCode = GetEntryByNumber(0x0008, 0x0010); // recognition code
99 if (RecCode == "ACRNEMA_LIBIDO_1.1" ||
100 RecCode == "CANRME_AILIBOD1_1." ) // for brain-damaged softwares
101 // with "little-endian strings"
103 filetype = gdcmACR_LIBIDO;
104 std::string rows = GetEntryByNumber(0x0028, 0x0010);
105 std::string columns = GetEntryByNumber(0x0028, 0x0011);
106 SetEntryByNumber(columns, 0x0028, 0x0010);
107 SetEntryByNumber(rows , 0x0028, 0x0011);
109 // ----------------- End of Special Patch ----------------
111 printLevel = 1; // 'Medium' print level by default
116 * @param exception_on_error
118 gdcmDocument::gdcmDocument(bool exception_on_error)
119 :gdcmElementSet(-1) {
120 (void)exception_on_error;
123 SetMaxSizeLoadEntry(MAX_SIZE_LOAD_ELEMENT_VALUE);
126 printLevel = 1; // 'Medium' print level by default
130 * \brief Canonical destructor.
132 gdcmDocument::~gdcmDocument (void) {
137 //-----------------------------------------------------------------------------
143 * \brief Prints The Dict Entries of THE public Dicom Dictionary
146 void gdcmDocument::PrintPubDict(std::ostream & os) {
147 RefPubDict->Print(os);
151 * \brief Prints The Dict Entries of THE shadow Dicom Dictionary
154 void gdcmDocument::PrintShaDict(std::ostream & os) {
155 RefShaDict->Print(os);
158 //-----------------------------------------------------------------------------
161 * \brief Get the public dictionary used
163 gdcmDict *gdcmDocument::GetPubDict(void) {
168 * \brief Get the shadow dictionary used
170 gdcmDict *gdcmDocument::GetShaDict(void) {
175 * \brief Set the shadow dictionary used
176 * \param dict dictionary to use in shadow
178 bool gdcmDocument::SetShaDict(gdcmDict *dict){
184 * \brief Set the shadow dictionary used
185 * \param dictName name of the dictionary to use in shadow
187 bool gdcmDocument::SetShaDict(DictKey dictName){
188 RefShaDict=gdcmGlobal::GetDicts()->GetDict(dictName);
193 * \brief This predicate, based on hopefully reasonable heuristics,
194 * decides whether or not the current gdcmDocument was properly parsed
195 * and contains the mandatory information for being considered as
196 * a well formed and usable Dicom/Acr File.
197 * @return true when gdcmDocument is the one of a reasonable Dicom/Acr file,
200 bool gdcmDocument::IsReadable(void) {
201 if(filetype==gdcmUnknown) {
202 std::cout << "wrong filetype" <<std::endl;
205 if(!tagHT.empty()<=0) {
206 std::cout << "wrong tagHT size "<< tagHT.size() <<std::endl;
214 * \brief Determines if the Transfer Syntax was already encountered
215 * and if it corresponds to a ImplicitVRLittleEndian one.
216 * @return True when ImplicitVRLittleEndian found. False in all other cases.
218 bool gdcmDocument::IsImplicitVRLittleEndianTransferSyntax(void) {
219 gdcmDocEntry *Element = GetDocEntryByNumber(0x0002, 0x0010);
222 LoadDocEntrySafe(Element);
224 std::string Transfer = ((gdcmValEntry *)Element)->GetValue();
225 if ( Transfer == UI1_2_840_10008_1_2 )
231 * \brief Determines if the Transfer Syntax was already encountered
232 * and if it corresponds to a ExplicitVRLittleEndian one.
233 * @return True when ExplicitVRLittleEndian found. False in all other cases.
235 bool gdcmDocument::IsExplicitVRLittleEndianTransferSyntax(void) {
236 gdcmDocEntry* Element = GetDocEntryByNumber(0x0002, 0x0010);
239 LoadDocEntrySafe(Element);
241 std::string Transfer = ((gdcmValEntry *)Element)->GetValue();
242 if ( Transfer == UI1_2_840_10008_1_2_1 )
248 * \brief Determines if the Transfer Syntax was already encountered
249 * and if it corresponds to a DeflatedExplicitVRLittleEndian one.
250 * @return True when DeflatedExplicitVRLittleEndian found. False in all other cases.
252 bool gdcmDocument::IsDeflatedExplicitVRLittleEndianTransferSyntax(void) {
253 gdcmDocEntry* Element = GetDocEntryByNumber(0x0002, 0x0010);
256 LoadDocEntrySafe(Element);
258 std::string Transfer = ((gdcmValEntry *)Element)->GetValue();
259 if ( Transfer == UI1_2_840_10008_1_2_1_99 )
265 * \brief Determines if the Transfer Syntax was already encountered
266 * and if it corresponds to a Explicit VR Big Endian one.
267 * @return True when big endian found. False in all other cases.
269 bool gdcmDocument::IsExplicitVRBigEndianTransferSyntax(void) {
270 gdcmDocEntry* Element = GetDocEntryByNumber(0x0002, 0x0010);
273 LoadDocEntrySafe(Element);
275 std::string Transfer = ((gdcmValEntry *)Element)->GetValue();
276 if ( Transfer == UI1_2_840_10008_1_2_2 ) //1.2.2 ??? A verifier !
282 * \brief returns the File Type
283 * (ACR, ACR_LIBIDO, ExplicitVR, ImplicitVR, Unknown)
284 * @return the FileType code
286 FileType gdcmDocument::GetFileType(void) {
291 * \brief opens the file
292 * @param exception_on_error
295 FILE *gdcmDocument::OpenFile(bool exception_on_error)
298 fp=fopen(filename.c_str(),"rb");
299 if(exception_on_error)
302 throw gdcmFileError("gdcmDocument::gdcmDocument(const char *, bool)");
308 fread(&zero, (size_t)2, (size_t)1, fp);
310 //ACR -- or DICOM with no Preamble --
311 if( zero == 0x0008 || zero == 0x0800 || zero == 0x0002 || zero == 0x0200)
315 fseek(fp, 126L, SEEK_CUR);
317 fread(dicm, (size_t)4, (size_t)1, fp);
318 if( memcmp(dicm, "DICM", 4) == 0 )
322 dbg.Verbose(0, "gdcmDocument::OpenFile not DICOM/ACR", filename.c_str());
325 dbg.Verbose(0, "gdcmDocument::OpenFile cannot open file", filename.c_str());
331 * \brief closes the file
332 * @return TRUE if the close was successfull
334 bool gdcmDocument::CloseFile(void) {
335 int closed = fclose(fp);
343 * \brief Writes in a file all the Header Entries (Dicom Elements)
344 * of the Chained List
345 * @param fp file pointer on an already open file
346 * @param type Type of the File to be written
347 * (ACR-NEMA, ExplicitVR, ImplicitVR)
348 * \return Always true.
350 bool gdcmDocument::Write(FILE *fp, FileType type) {
353 /// The stuff will have to be rewritten using the SeQuence based
354 /// tree-like stucture instead of the chained list .
355 /// (so we shall remove the Group*HT from the gdcmDocument)
359 /// \todo move the following lines (and a lot of others, to be written)
360 /// to a future function CheckAndCorrectHeader
364 /// Comment pourrait-on savoir si le DcmHeader vient d'un fichier
365 /// DicomV3 ou non (FileType est un champ de gdcmDocument ...)
366 /// WARNING : Si on veut ecrire du DICOM V3 a partir d'un DcmHeader ACR-NEMA
368 /// a moins de se livrer a un tres complique ajout des champs manquants.
369 /// faire un CheckAndCorrectHeader (?)
371 if (type == gdcmImplicitVR)
373 std::string implicitVRTransfertSyntax = UI1_2_840_10008_1_2;
374 ReplaceOrCreateByNumber(implicitVRTransfertSyntax,0x0002, 0x0010);
376 /// \todo Refer to standards on page 21, chapter 6.2
377 /// "Value representation": values with a VR of UI shall be
378 /// padded with a single trailing null
379 /// Dans le cas suivant on doit pader manuellement avec un 0
381 SetEntryLengthByNumber(18, 0x0002, 0x0010);
384 if (type == gdcmExplicitVR)
386 std::string explicitVRTransfertSyntax = UI1_2_840_10008_1_2_1;
387 ReplaceOrCreateByNumber(explicitVRTransfertSyntax,0x0002, 0x0010);
389 /// \todo Refer to standards on page 21, chapter 6.2
390 /// "Value representation": values with a VR of UI shall be
391 /// padded with a single trailing null
392 /// Dans le cas suivant on doit pader manuellement avec un 0
394 SetEntryLengthByNumber(20, 0x0002, 0x0010);
398 * \todo rewrite later, if really usefull
400 * --> Warning : un-updated odd groups lengths can causes pb
401 * --> (xmedcon breaks)
402 * --> to be re- written with future org.
404 * if ( (type == ImplicitVR) || (type == ExplicitVR) )
405 * UpdateGroupLength(false,type);
407 * UpdateGroupLength(true,ACR);
410 WriteEntries(fp,type);
415 * \brief Modifies the value of a given Header Entry (Dicom Element)
416 * when it exists. Create it with the given value when unexistant.
417 * @param Value Value to be set
418 * @param Group Group number of the Entry
419 * @param Elem Element number of the Entry
420 * \return pointer to the modified/created Header Entry (NULL when creation
425 gdcmDocEntry * gdcmDocument::ReplaceOrCreateByNumber(
430 a = GetDocEntryByNumber( Group, Elem);
432 a =NewDocEntryByNumber(Group, Elem);
437 SetEntryByNumber(Value, Group, Elem);
438 //a->SetValue(Value);
443 * \brief Set a new value if the invoked element exists
444 * Seems to be useless !!!
445 * @param Value new element value
446 * @param Group group number of the Entry
447 * @param Elem element number of the Entry
450 bool gdcmDocument::ReplaceIfExistByNumber(char* Value, guint16 Group, guint16 Elem )
452 std::string v = Value;
453 SetEntryByNumber(v, Group, Elem);
457 //-----------------------------------------------------------------------------
461 * \brief Checks if a given Dicom Element exists within the H table
462 * @param group Group number of the searched Dicom Element
463 * @param element Element number of the searched Dicom Element
464 * @return number of occurences
466 int gdcmDocument::CheckIfEntryExistByNumber(guint16 group, guint16 element ) {
467 std::string key = gdcmDictEntry::TranslateToKey(group, element );
468 return (tagHT.count(key));
472 * \brief Searches within Header Entries (Dicom Elements) parsed with
473 * the public and private dictionaries
474 * for the element value of a given tag.
475 * \warning Don't use any longer : use GetPubEntryByName
476 * @param tagName name of the searched element.
477 * @return Corresponding element value when it exists,
478 * and the string GDCM_UNFOUND ("gdcm::Unfound") otherwise.
480 std::string gdcmDocument::GetEntryByName(std::string tagName) {
481 gdcmDictEntry *dictEntry = RefPubDict->GetDictEntryByName(tagName);
482 if( dictEntry == NULL)
485 return(GetEntryByNumber(dictEntry->GetGroup(),dictEntry->GetElement()));
489 * \brief Searches within Header Entries (Dicom Elements) parsed with
490 * the public and private dictionaries
491 * for the element value representation of a given tag.
493 * Obtaining the VR (Value Representation) might be needed by caller
494 * to convert the string typed content to caller's native type
495 * (think of C++ vs Python). The VR is actually of a higher level
496 * of semantics than just the native C++ type.
497 * @param tagName name of the searched element.
498 * @return Corresponding element value representation when it exists,
499 * and the string GDCM_UNFOUND ("gdcm::Unfound") otherwise.
501 std::string gdcmDocument::GetEntryVRByName(std::string tagName) {
502 gdcmDictEntry *dictEntry = RefPubDict->GetDictEntryByName(tagName);
503 if( dictEntry == NULL)
506 gdcmDocEntry* elem = GetDocEntryByNumber(dictEntry->GetGroup(),
507 dictEntry->GetElement());
508 return elem->GetVR();
513 * \brief Searches within Header Entries (Dicom Elements) parsed with
514 * the public and private dictionaries
515 * for the element value representation of a given tag.
516 * @param group Group number of the searched tag.
517 * @param element Element number of the searched tag.
518 * @return Corresponding element value representation when it exists,
519 * and the string GDCM_UNFOUND ("gdcm::Unfound") otherwise.
521 std::string gdcmDocument::GetEntryByNumber(guint16 group, guint16 element){
522 TagKey key = gdcmDictEntry::TranslateToKey(group, element);
523 if ( ! tagHT.count(key))
525 return ((gdcmValEntry *)tagHT.find(key)->second)->GetValue();
529 * \brief Searches within Header Entries (Dicom Elements) parsed with
530 * the public and private dictionaries
531 * for the element value representation of a given tag..
533 * Obtaining the VR (Value Representation) might be needed by caller
534 * to convert the string typed content to caller's native type
535 * (think of C++ vs Python). The VR is actually of a higher level
536 * of semantics than just the native C++ type.
537 * @param group Group number of the searched tag.
538 * @param element Element number of the searched tag.
539 * @return Corresponding element value representation when it exists,
540 * and the string GDCM_UNFOUND ("gdcm::Unfound") otherwise.
542 std::string gdcmDocument::GetEntryVRByNumber(guint16 group, guint16 element) {
543 gdcmDocEntry* elem = GetDocEntryByNumber(group, element);
546 return elem->GetVR();
550 * \brief Searches within Header Entries (Dicom Elements) parsed with
551 * the public and private dictionaries
552 * for the value length of a given tag..
553 * @param group Group number of the searched tag.
554 * @param element Element number of the searched tag.
555 * @return Corresponding element length; -2 if not found
557 int gdcmDocument::GetEntryLengthByNumber(guint16 group, guint16 element) {
558 gdcmDocEntry* elem = GetDocEntryByNumber(group, element);
561 return elem->GetLength();
564 * \brief Sets the value (string) of the Header Entry (Dicom Element)
565 * @param content string value of the Dicom Element
566 * @param tagName name of the searched Dicom Element.
567 * @return true when found
569 bool gdcmDocument::SetEntryByName(std::string content,std::string tagName) {
570 gdcmDictEntry *dictEntry = RefPubDict->GetDictEntryByName(tagName);
571 if( dictEntry == NULL)
574 return(SetEntryByNumber(content,dictEntry->GetGroup(),
575 dictEntry->GetElement()));
579 * \brief Accesses an existing gdcmDocEntry (i.e. a Dicom Element)
580 * through it's (group, element) and modifies it's content with
582 * @param content new value to substitute with
583 * @param group group number of the Dicom Element to modify
584 * @param element element number of the Dicom Element to modify
586 bool gdcmDocument::SetEntryByNumber(std::string content,
590 TagKey key = gdcmDictEntry::TranslateToKey(group, element);
591 if ( ! tagHT.count(key))
593 int l = content.length();
594 if(l%2) // Non even length are padded with a space (020H).
597 content = content + '\0';
603 ((gdcmValEntry*)a)->SetValue(content);
605 std::string vr = a->GetVR();
608 if( (vr == "US") || (vr == "SS") )
610 else if( (vr == "UL") || (vr == "SL") )
620 * \brief Accesses an existing gdcmDocEntry (i.e. a Dicom Element)
621 * in the PubDocEntrySet of this instance
622 * through it's (group, element) and modifies it's length with
624 * \warning Use with extreme caution.
625 * @param l new length to substitute with
626 * @param group group number of the Entry to modify
627 * @param element element number of the Entry to modify
628 * @return true on success, false otherwise.
630 bool gdcmDocument::SetEntryLengthByNumber(guint32 l,
634 TagKey key = gdcmDictEntry::TranslateToKey(group, element);
635 if ( ! tagHT.count(key))
637 if (l%2) l++; // length must be even
638 ( ((tagHT.equal_range(key)).first)->second )->SetLength(l);
644 * \brief Gets (from Header) the offset of a 'non string' element value
645 * (LoadElementValues has already be executed)
646 * @param Group group number of the Entry
647 * @param Elem element number of the Entry
648 * @return File Offset of the Element Value
650 size_t gdcmDocument::GetEntryOffsetByNumber(guint16 Group, guint16 Elem)
652 gdcmDocEntry* Entry = GetDocEntryByNumber(Group, Elem);
655 dbg.Verbose(1, "gdcmDocument::GetDocEntryByNumber",
656 "failed to Locate gdcmDocEntry");
659 return Entry->GetOffset();
663 * \brief Gets (from Header) a 'non string' element value
664 * (LoadElementValues has already be executed)
665 * @param Group group number of the Entry
666 * @param Elem element number of the Entry
667 * @return Pointer to the 'non string' area
669 void * gdcmDocument::GetEntryVoidAreaByNumber(guint16 Group, guint16 Elem)
671 gdcmDocEntry* Entry = GetDocEntryByNumber(Group, Elem);
674 dbg.Verbose(1, "gdcmDocument::GetDocEntryByNumber",
675 "failed to Locate gdcmDocEntry");
678 return ((gdcmBinEntry *)Entry)->GetVoidArea();
682 * \brief Loads (from disk) the element content
683 * when a string is not suitable
684 * @param Group group number of the Entry
685 * @param Elem element number of the Entry
687 void *gdcmDocument::LoadEntryVoidArea(guint16 Group, guint16 Elem)
689 gdcmDocEntry * Element= GetDocEntryByNumber(Group, Elem);
692 size_t o =(size_t)Element->GetOffset();
693 fseek(fp, o, SEEK_SET);
694 size_t l=Element->GetLength();
695 char* a = new char[l];
699 SetEntryVoidAreaByNumber(a, Group, Elem);
700 /// \todo check the result
701 size_t l2 = fread(a, 1, l ,fp);
712 * \brief Sets a 'non string' value to a given Dicom Element
714 * @param group Group number of the searched Dicom Element
715 * @param element Element number of the searched Dicom Element
718 bool gdcmDocument::SetEntryVoidAreaByNumber(void * area,
722 TagKey key = gdcmDictEntry::TranslateToKey(group, element);
723 if ( ! tagHT.count(key))
725 // This was for multimap ?
726 (( gdcmBinEntry *)( ((tagHT.equal_range(key)).first)->second ))->SetVoidArea(area);
732 * \brief Update the entries with the shadow dictionary.
733 * Only non even entries are analyzed
735 void gdcmDocument::UpdateShaEntries(void) {
736 gdcmDictEntry *entry;
739 // TODO : if still any use (?) explore recursively the whole structure
741 for(ListTag::iterator it=listEntries.begin();
742 it!=listEntries.end();
745 // Odd group => from public dictionary
746 if((*it)->GetGroup()%2==0)
749 // Peer group => search the corresponding dict entry
751 entry=RefShaDict->GetDictEntryByNumber((*it)->GetGroup(),(*it)->GetElement());
755 if((*it)->IsImplicitVR())
760 (*it)->SetValue(GetDocEntryUnvalue(*it)); // to go on compiling
762 // Set the new entry and the new value
763 (*it)->SetDictEntry(entry);
764 CheckDocEntryVR(*it,vr);
766 (*it)->SetValue(GetDocEntryValue(*it)); // to go on compiling
771 // Remove precedent value transformation
772 (*it)->SetDictEntry(NewVirtualDictEntry((*it)->GetGroup(),(*it)->GetElement(),vr));
779 * \brief Searches within the Header Entries for a Dicom Element of
781 * @param tagName name of the searched Dicom Element.
782 * @return Corresponding Dicom Element when it exists, and NULL
785 gdcmDocEntry *gdcmDocument::GetDocEntryByName(std::string tagName) {
786 gdcmDictEntry *dictEntry = RefPubDict->GetDictEntryByName(tagName);
787 if( dictEntry == NULL)
790 return(GetDocEntryByNumber(dictEntry->GetGroup(),dictEntry->GetElement()));
794 * \brief retrieves a Dicom Element (the first one) using (group, element)
795 * \warning (group, element) IS NOT an identifier inside the Dicom Header
796 * if you think it's NOT UNIQUE, check the count number
797 * and use iterators to retrieve ALL the Dicoms Elements within
798 * a given couple (group, element)
799 * @param group Group number of the searched Dicom Element
800 * @param element Element number of the searched Dicom Element
803 gdcmDocEntry* gdcmDocument::GetDocEntryByNumber(guint16 group, guint16 element)
805 TagKey key = gdcmDictEntry::TranslateToKey(group, element);
806 if ( ! tagHT.count(key))
808 return tagHT.find(key)->second;
812 * \brief Loads the element while preserving the current
813 * underlying file position indicator as opposed to
814 * to LoadDocEntry that modifies it.
815 * @param entry Header Entry whose value shall be loaded.
818 void gdcmDocument::LoadDocEntrySafe(gdcmDocEntry * entry) {
819 long PositionOnEntry = ftell(fp);
821 fseek(fp, PositionOnEntry, SEEK_SET);
826 * \brief Writes in a file (according to the requested format)
827 * the group, the element, the value representation and the length
828 * of a single gdcmDocEntry passed as argument.
829 * @param tag pointer on the gdcmDocEntry to be written
830 * @param _fp already open file pointer
831 * @param type type of the File to be written
833 void gdcmDocument::WriteEntryTagVRLength(gdcmDocEntry *tag,
837 guint16 group = tag->GetGroup();
838 std::string vr = tag->GetVR();
839 guint16 el = tag->GetElement();
840 guint32 lgr = tag->GetReadLength();
842 if ( (group == 0xfffe) && (el == 0x0000) )
843 // Fix in order to make some MR PHILIPS images e-film readable
844 // see gdcmData/gdcm-MR-PHILIPS-16-Multi-Seq.dcm:
845 // we just *always* ignore spurious fffe|0000 tag !
848 fwrite ( &group,(size_t)2 ,(size_t)1 ,_fp); //group
849 fwrite ( &el,(size_t)2 ,(size_t)1 ,_fp); //element
851 if ( type == gdcmExplicitVR ) {
853 // Special case of delimiters:
854 if (group == 0xfffe) {
855 // Delimiters have NO Value Representation and have NO length.
856 // Hence we skip writing the VR and length and we pad by writing
860 fwrite (&ff,(size_t)4 ,(size_t)1 ,_fp);
865 guint16 shortLgr = lgr;
866 if (vr == "unkn") { // Unknown was 'written'
867 // deal with Little Endian
868 fwrite ( &shortLgr,(size_t)2 ,(size_t)1 ,_fp);
869 fwrite ( &z, (size_t)2 ,(size_t)1 ,_fp);
871 fwrite (vr.c_str(),(size_t)2 ,(size_t)1 ,_fp);
872 if ( (vr == "OB") || (vr == "OW") || (vr == "SQ") )
874 fwrite ( &z, (size_t)2 ,(size_t)1 ,_fp);
875 fwrite ( &lgr,(size_t)4 ,(size_t)1 ,_fp);
877 fwrite ( &shortLgr,(size_t)2 ,(size_t)1 ,_fp);
883 fwrite ( &lgr,(size_t)4 ,(size_t)1 ,_fp);
888 * \brief Writes in a file (according to the requested format)
889 * the value of a single gdcmDocEntry passed as argument.
890 * @param tag Pointer on the gdcmDocEntry to be written
891 * @param _fp Already open file pointer
892 * @param type type of the File to be written
895 // TODO : to be re -written recursively !
897 void gdcmDocument::WriteEntryValue(gdcmDocEntry *tag, FILE *_fp,FileType type)
900 guint16 group = tag->GetGroup();
901 std::string vr = tag->GetVR();
902 guint32 lgr = tag->GetReadLength();
905 // SeQuences have no value:
908 // Delimiters have no associated value:
911 //--------------------------------
915 // -------------------------------
918 /* // to go on compiling
920 voidArea = tag->GetVoidArea(); // to go on compiling
921 if (voidArea != NULL)
922 { // there is a 'non string' LUT, overlay, etc
923 fwrite ( voidArea,(size_t)lgr ,(size_t)1 ,_fp); // Elem value
927 if (vr == "US" || vr == "SS")
929 // some 'Short integer' fields may be mulivaluated
930 // each single value is separated from the next one by '\'
931 // we split the string and write each value as a short int
932 std::vector<std::string> tokens;
933 tokens.erase(tokens.begin(),tokens.end()); // clean any previous value
934 Tokenize (((gdcmValEntry *)tag)->GetValue(), tokens, "\\");
935 for (unsigned int i=0; i<tokens.size();i++)
937 guint16 val_uint16 = atoi(tokens[i].c_str());
938 void *ptr = &val_uint16;
939 fwrite ( ptr,(size_t)2 ,(size_t)1 ,_fp);
944 // some 'Integer' fields may be mulivaluated
945 // each single value is separated from the next one by '\'
946 // we split the string and write each value as an int
947 if (vr == "UL" || vr == "SL")
949 std::vector<std::string> tokens;
950 tokens.erase(tokens.begin(),tokens.end()); // clean any previous value
951 Tokenize (((gdcmValEntry *)tag)->GetValue(), tokens, "\\");
952 for (unsigned int i=0; i<tokens.size();i++)
954 guint32 val_uint32 = atoi(tokens[i].c_str());
955 void *ptr = &val_uint32;
956 fwrite ( ptr,(size_t)4 ,(size_t)1 ,_fp);
961 fwrite (((gdcmValEntry *)tag)->GetValue().c_str(), (size_t)lgr ,(size_t)1, _fp); // Elem value
965 * \brief Writes in a file (according to the requested format)
966 * a single gdcmDocEntry passed as argument.
967 * \sa WriteEntryValue, WriteEntryTagVRLength.
968 * @param tag Pointer on the gdcmDocEntry to be written
969 * @param _fp Already open file pointer
970 * @param type type of the File to be written
973 bool gdcmDocument::WriteEntry(gdcmDocEntry *tag, FILE *_fp,FileType type)
975 guint32 length = tag->GetLength();
976 gdcmValEntry * Vtag = (gdcmValEntry *) tag;
977 std::cout << "gdcmDocument::WriteEntry Vtag->GetValue() " << Vtag->GetValue() << std::endl;
978 // The value of a tag MUST (see the DICOM norm) be an odd number of
979 // bytes. When this is not the case, pad with an additional byte:
982 Vtag->SetValue(Vtag->GetValue()+"\0");
983 Vtag->SetLength(Vtag->GetReadLength()+1);
986 WriteEntryTagVRLength(Vtag, _fp, type);
987 std::cout << "after WriteEntryTagVRLength " << std::endl;
988 WriteEntryValue(Vtag, _fp, type);
989 std::cout << "after WriteEntryValue " << std::endl;
994 * \brief writes on disc according to the requested format
995 * (ACR-NEMA, ExplicitVR, ImplicitVR) the image
996 * using the Chained List
997 * \warning does NOT add the missing elements in the header :
998 * it's up to the user doing it !
999 * (function CheckHeaderCoherence to be written)
1000 * \warning DON'T try, right now, to write a DICOM image
1001 * from an ACR Header (meta elements will be missing!)
1002 * @param type type of the File to be written
1003 * (ACR-NEMA, ExplicitVR, ImplicitVR)
1004 * @param _fp already open file pointer
1007 bool gdcmDocument::WriteEntries(FILE *_fp,FileType type)
1010 // FIXME : explore recursively the whole structure...
1012 /// \todo (?) check write failures (after *each* fwrite)
1014 std::cout << "--------------------- gdcmDocument::WriteEntries " << std::endl;
1015 for (TagDocEntryHT::iterator tag2=tagHT.begin();
1016 tag2 != tagHT.end();
1020 (*tag2).second->Print();
1022 if ( type == gdcmACR ){
1023 if ((*tag2).second->GetGroup() < 0x0008)
1024 // Ignore pure DICOM V3 groups
1026 if ((*tag2).second->GetElement() %2)
1027 // Ignore the "shadow" groups
1029 if ((*tag2).second->GetVR() == "SQ" ) // ignore Sequences
1031 //if ((*tag2).second->GetDepthLevel() != 0) // Not only ignore the SQ element
1034 if (! WriteEntry((*tag2).second,_fp,type) ) {
1035 std::cout << "Write Failure " << std::endl;
1046 * \brief Swaps back the bytes of 4-byte long integer accordingly to
1048 * @return The properly swaped 32 bits integer.
1050 guint32 gdcmDocument::SwapLong(guint32 a) {
1055 a=( ((a<<24) & 0xff000000) | ((a<<8) & 0x00ff0000) |
1056 ((a>>8) & 0x0000ff00) | ((a>>24) & 0x000000ff) );
1060 a=( ((a<<16) & 0xffff0000) | ((a>>16) & 0x0000ffff) );
1064 a=( ((a<<8) & 0xff00ff00) | ((a>>8) & 0x00ff00ff) );
1067 std::cout << "swapCode= " << sw << std::endl;
1068 dbg.Error(" gdcmDocument::SwapLong : unset swap code");
1075 * \brief Unswaps back the bytes of 4-byte long integer accordingly to
1077 * @return The properly unswaped 32 bits integer.
1079 guint32 gdcmDocument::UnswapLong(guint32 a) {
1080 return (SwapLong(a));
1084 * \brief Swaps the bytes so they agree with the processor order
1085 * @return The properly swaped 16 bits integer.
1087 guint16 gdcmDocument::SwapShort(guint16 a) {
1088 if ( (sw==4321) || (sw==2143) )
1089 a =(((a<<8) & 0x0ff00) | ((a>>8)&0x00ff));
1094 * \brief Unswaps the bytes so they agree with the processor order
1095 * @return The properly unswaped 16 bits integer.
1097 guint16 gdcmDocument::UnswapShort(guint16 a) {
1098 return (SwapShort(a));
1101 //-----------------------------------------------------------------------------
1105 * \brief Parses a DocEntrySet (Zero-level DocEntries or SQ Item DocEntries)
1106 * @return false if file is not ACR-NEMA / PAPYRUS / DICOM
1109 long gdcmDocument::ParseDES(gdcmDocEntrySet *set, long offset, long l_max, bool delim_mode) {
1111 gdcmDocEntry *NewDocEntry = (gdcmDocEntry *)0;
1119 depth = set->GetDepthLevel();
1122 if ( !delim_mode && ftell(fp)-offset >= l_max) {
1125 NewDocEntry = ReadNextDocEntry( );
1129 vr = NewDocEntry->GetVR();
1132 if (vr == "AE" || vr == "AS" || vr == "DA" || vr == "PN" ||
1133 vr == "UI" || vr == "TM" || vr == "SH" || vr == "LO" ||
1134 vr == "CS" || vr == "IS" || vr == "LO" || vr == "LT" ||
1135 vr == "SH" || vr == "ST" || vr == "DS" ||
1136 vr == "SL" || vr == "SS" || vr == "UL" || vr == "US"
1139 vl= new gdcmValEntry(NewDocEntry->GetDictEntry());
1140 vl->Copy(NewDocEntry);
1141 vl->SetDepthLevel(depth),
1144 if (/*!delim_mode && */vl->isItemDelimitor())
1146 if ( !delim_mode && ftell(fp)-offset >= l_max) {
1149 } else { // BinEntry
1151 // Hope the following VR *do* correspond to a BinEntry
1153 //AT Attribute Tag; // 2 16-bit unsigned short integers
1154 //FL Floating Point Single; // 32-bit IEEE 754:1985 float
1155 //FD Floating Point Double; // 64-bit IEEE 754:1985 double
1156 //UN Unknown; // Any length of bytes
1157 //UT Unlimited Text; // At most 2^32 -1 chars
1158 //OB Other Byte String; // String of bytes (VR independant)
1159 //OW Other Word String; // String of 16-bit words (VR dependant)
1161 bn = new gdcmBinEntry(NewDocEntry->GetDictEntry());
1162 bn->Copy(NewDocEntry);
1166 if (NewDocEntry->GetGroup() == 0x7fe0 &&
1167 NewDocEntry->GetElement() == 0x0010 ) {
1168 if (NewDocEntry->GetLength()==0xffffffff)
1169 // Broke US.3405.1.dcm
1171 Parse7FE0(); // to skip the pixels
1172 // (multipart JPEG/RLE are trouble makers)
1174 SkipToNextDocEntry(NewDocEntry); // to be sure we are at the beginning
1175 l = NewDocEntry->GetFullLength();
1177 } else { // VR = "SQ"
1179 l=NewDocEntry->GetReadLength();
1180 if (l != 0) // don't mess the delim_mode for zero-length sequence
1181 if (l == 0xffffffff)
1185 // no other way to create it ...
1186 sq = new gdcmSeqEntry(NewDocEntry->GetDictEntry(),set->GetDepthLevel());
1187 sq->Copy(NewDocEntry);
1188 sq->SetDelimitorMode(delim_mode);
1189 sq->SetDepthLevel(depth);
1191 if (l != 0) { // Don't try to parse zero-length sequences
1193 long lgt = ParseSQ( sq,
1194 NewDocEntry->GetOffset(),
1197 // FIXME : on en fait quoi, de lgt ?
1199 if ( !delim_mode && ftell(fp)-offset >= l_max) {
1209 * \brief Parses a Sequence ( SeqEntry after SeqEntry)
1210 * @return parsed length for this level
1212 long gdcmDocument::ParseSQ(gdcmSeqEntry *set, long offset, long l_max, bool delim_mode) {
1213 int SQItemNumber = 0;
1214 gdcmDocEntry *NewDocEntry = (gdcmDocEntry *)0;
1218 int depth = set->GetDepthLevel();
1221 NewDocEntry = ReadNextDocEntry();
1223 if (NewDocEntry->isSequenceDelimitor()) {
1224 //add the Sequence Delimitor // TODO : find the trick to put it properly !
1225 set->SetSequenceDelimitationItem(NewDocEntry);
1229 if (!delim_mode && (ftell(fp)-offset) >= l_max) {
1232 itemSQ = new gdcmSQItem(set->GetDepthLevel());
1233 itemSQ->AddEntry(NewDocEntry); // no value, no voidArea. Think of it while printing !
1234 l= NewDocEntry->GetReadLength();
1241 lgr=ParseDES(itemSQ, NewDocEntry->GetOffset(), l, dlm_mod);
1243 set->AddEntry(itemSQ);
1244 SQItemNumber ++; // a voir
1245 if (!delim_mode && (ftell(fp)-offset) >= l_max) {
1249 lgth = ftell(fp) - offset;
1254 * \brief Loads the element content if its length doesn't exceed
1255 * the value specified with gdcmDocument::SetMaxSizeLoadEntry()
1256 * @param Entry Header Entry (Dicom Element) to be dealt with
1258 void gdcmDocument::LoadDocEntry(gdcmDocEntry *Entry) {
1260 guint16 group = Entry->GetGroup();
1261 std::string vr= Entry->GetVR();
1262 guint32 length = Entry->GetLength();
1264 fseek(fp, (long)Entry->GetOffset(), SEEK_SET);
1266 // A SeQuence "contains" a set of Elements.
1267 // (fffe e000) tells us an Element is beginning
1268 // (fffe e00d) tells us an Element just ended
1269 // (fffe e0dd) tells us the current SeQuence just ended
1270 if( group == 0xfffe ) {
1271 // NO more value field for SQ !
1272 //Entry->SetValue("gdcm::Skipped");
1273 // appel recursif de Load Value
1274 // (meme pb que pour le parsing)
1278 // When the length is zero things are easy:
1279 if ( length == 0 ) {
1280 ((gdcmValEntry *)Entry)->SetValue("");
1284 // The elements whose length is bigger than the specified upper bound
1285 // are not loaded. Instead we leave a short notice of the offset of
1286 // the element content and it's length.
1287 if (length > MaxSizeLoadEntry) {
1288 std::ostringstream s;
1289 ((gdcmValEntry *)Entry)->SetValue(s.str());
1290 // to be sure we are at the end of the value ...
1291 fseek(fp,(long)Entry->GetOffset()+(long)Entry->GetLength(),SEEK_SET);
1296 // Any compacter code suggested (?)
1297 if ( IsDocEntryAnInteger(Entry) ) {
1299 std::ostringstream s;
1301 // When short integer(s) are expected, read and convert the following
1302 // n *two characters properly i.e. as short integers as opposed to strings.
1303 // Elements with Value Multiplicity > 1
1304 // contain a set of integers (not a single one)
1305 if (vr == "US" || vr == "SS") {
1307 NewInt = ReadInt16();
1310 for (int i=1; i < nbInt; i++) {
1312 NewInt = ReadInt16();
1317 // When integer(s) are expected, read and convert the following
1318 // n * four characters properly i.e. as integers as opposed to strings.
1319 // Elements with Value Multiplicity > 1
1320 // contain a set of integers (not a single one)
1321 else if (vr == "UL" || vr == "SL") {
1323 NewInt = ReadInt32();
1326 for (int i=1; i < nbInt; i++) {
1328 NewInt = ReadInt32();
1333 #ifdef GDCM_NO_ANSI_STRING_STREAM
1334 s << std::ends; // to avoid oddities on Solaris
1335 #endif //GDCM_NO_ANSI_STRING_STREAM
1337 ((gdcmValEntry *)Entry)->SetValue(s.str());
1341 // We need an additional byte for storing \0 that is not on disk
1342 std::string NewValue(length,0);
1343 item_read = fread(&(NewValue[0]), (size_t)length, (size_t)1, fp);
1344 if ( item_read != 1 ) {
1345 dbg.Verbose(1, "gdcmDocument::LoadElementValue","unread element value");
1346 ((gdcmValEntry *)Entry)->SetValue("gdcm::UnRead");
1350 if( (vr == "UI") ) // Because of correspondance with the VR dic
1351 ((gdcmValEntry *)Entry)->SetValue(NewValue.c_str());
1353 ((gdcmValEntry *)Entry)->SetValue(NewValue);
1358 * \brief Find the value Length of the passed Header Entry
1359 * @param Entry Header Entry whose length of the value shall be loaded.
1361 void gdcmDocument::FindDocEntryLength (gdcmDocEntry *Entry) {
1362 guint16 element = Entry->GetElement();
1363 //guint16 group = Entry->GetGroup(); //FIXME
1364 std::string vr = Entry->GetVR();
1368 if ( (filetype == gdcmExplicitVR) && (! Entry->IsImplicitVR()) )
1370 if ( (vr=="OB") || (vr=="OW") || (vr=="SQ") || (vr=="UN") )
1372 // The following reserved two bytes (see PS 3.5-2001, section
1373 // 7.1.2 Data element structure with explicit vr p27) must be
1374 // skipped before proceeding on reading the length on 4 bytes.
1375 fseek(fp, 2L, SEEK_CUR);
1376 guint32 length32 = ReadInt32();
1378 if ( (vr == "OB") && (length32 == 0xffffffff) )
1380 Entry->SetLength(FindDocEntryLengthOB());
1383 FixDocEntryFoundLength(Entry, length32);
1387 // Length is encoded on 2 bytes.
1388 length16 = ReadInt16();
1390 // We can tell the current file is encoded in big endian (like
1391 // Data/US-RGB-8-epicard) when we find the "Transfer Syntax" tag
1392 // and it's value is the one of the encoding of a big endian file.
1393 // In order to deal with such big endian encoded files, we have
1394 // (at least) two strategies:
1395 // * when we load the "Transfer Syntax" tag with value of big endian
1396 // encoding, we raise the proper flags. Then we wait for the end
1397 // of the META group (0x0002) among which is "Transfer Syntax",
1398 // before switching the swap code to big endian. We have to postpone
1399 // the switching of the swap code since the META group is fully encoded
1400 // in little endian, and big endian coding only starts at the next
1401 // group. The corresponding code can be hard to analyse and adds
1402 // many additional unnecessary tests for regular tags.
1403 // * the second strategy consists in waiting for trouble, that shall
1404 // appear when we find the first group with big endian encoding. This
1405 // is easy to detect since the length of a "Group Length" tag (the
1406 // ones with zero as element number) has to be of 4 (0x0004). When we
1407 // encounter 1024 (0x0400) chances are the encoding changed and we
1408 // found a group with big endian encoding.
1409 // We shall use this second strategy. In order to make sure that we
1410 // can interpret the presence of an apparently big endian encoded
1411 // length of a "Group Length" without committing a big mistake, we
1412 // add an additional check: we look in the already parsed elements
1413 // for the presence of a "Transfer Syntax" whose value has to be "big
1414 // endian encoding". When this is the case, chances are we have got our
1415 // hands on a big endian encoded file: we switch the swap code to
1416 // big endian and proceed...
1417 if ( (element == 0x0000) && (length16 == 0x0400) )
1419 if ( ! IsExplicitVRBigEndianTransferSyntax() )
1421 dbg.Verbose(0, "gdcmDocument::FindLength", "not explicit VR");
1426 SwitchSwapToBigEndian();
1427 // Restore the unproperly loaded values i.e. the group, the element
1428 // and the dictionary entry depending on them.
1429 guint16 CorrectGroup = SwapShort(Entry->GetGroup());
1430 guint16 CorrectElem = SwapShort(Entry->GetElement());
1431 gdcmDictEntry * NewTag = GetDictEntryByNumber(CorrectGroup,
1435 // This correct tag is not in the dictionary. Create a new one.
1436 NewTag = NewVirtualDictEntry(CorrectGroup, CorrectElem);
1438 // FIXME this can create a memory leaks on the old entry that be
1439 // left unreferenced.
1440 Entry->SetDictEntry(NewTag);
1443 // Heuristic: well some files are really ill-formed.
1444 if ( length16 == 0xffff)
1447 //dbg.Verbose(0, "gdcmDocument::FindLength",
1448 // "Erroneous element length fixed.");
1449 // Actually, length= 0xffff means that we deal with
1450 // Unknown Sequence Length
1452 FixDocEntryFoundLength(Entry, (guint32)length16);
1457 // Either implicit VR or a non DICOM conformal (see note below) explicit
1458 // VR that ommited the VR of (at least) this element. Farts happen.
1459 // [Note: according to the part 5, PS 3.5-2001, section 7.1 p25
1460 // on Data elements "Implicit and Explicit VR Data Elements shall
1461 // not coexist in a Data Set and Data Sets nested within it".]
1462 // Length is on 4 bytes.
1464 FixDocEntryFoundLength(Entry, ReadInt32());
1470 * \brief Find the Value Representation of the current Dicom Element.
1473 void gdcmDocument::FindDocEntryVR( gdcmDocEntry *Entry)
1475 if (filetype != gdcmExplicitVR)
1480 long PositionOnEntry = ftell(fp);
1481 // Warning: we believe this is explicit VR (Value Representation) because
1482 // we used a heuristic that found "UL" in the first tag. Alas this
1483 // doesn't guarantee that all the tags will be in explicit VR. In some
1484 // cases (see e-film filtered files) one finds implicit VR tags mixed
1485 // within an explicit VR file. Hence we make sure the present tag
1486 // is in explicit VR and try to fix things if it happens not to be
1489 (void)fread (&VR, (size_t)2,(size_t)1, fp);
1491 if(!CheckDocEntryVR(Entry,VR))
1493 fseek(fp, PositionOnEntry, SEEK_SET);
1494 // When this element is known in the dictionary we shall use, e.g. for
1495 // the semantics (see the usage of IsAnInteger), the VR proposed by the
1496 // dictionary entry. Still we have to flag the element as implicit since
1497 // we know now our assumption on expliciteness is not furfilled.
1499 if ( Entry->IsVRUnknown() )
1500 Entry->SetVR("Implicit");
1501 Entry->SetImplicitVR();
1506 * \brief Check the correspondance between the VR of the header entry
1507 * and the taken VR. If they are different, the header entry is
1508 * updated with the new VR.
1509 * @param Entry Header Entry to check
1510 * @param vr Dicom Value Representation
1511 * @return false if the VR is incorrect of if the VR isn't referenced
1512 * otherwise, it returns true
1514 bool gdcmDocument::CheckDocEntryVR(gdcmDocEntry *Entry, VRKey vr)
1516 char msg[100]; // for sprintf
1517 bool RealExplicit = true;
1519 // Assume we are reading a falsely explicit VR file i.e. we reached
1520 // a tag where we expect reading a VR but are in fact we read the
1521 // first to bytes of the length. Then we will interogate (through find)
1522 // the dicom_vr dictionary with oddities like "\004\0" which crashes
1523 // both GCC and VC++ implementations of the STL map. Hence when the
1524 // expected VR read happens to be non-ascii characters we consider
1525 // we hit falsely explicit VR tag.
1527 if ( (!isalpha(vr[0])) && (!isalpha(vr[1])) )
1528 RealExplicit = false;
1530 // CLEANME searching the dicom_vr at each occurence is expensive.
1531 // PostPone this test in an optional integrity check at the end
1532 // of parsing or only in debug mode.
1533 if ( RealExplicit && !gdcmGlobal::GetVR()->Count(vr) )
1534 RealExplicit= false;
1536 if ( !RealExplicit )
1538 // We thought this was explicit VR, but we end up with an
1539 // implicit VR tag. Let's backtrack.
1540 sprintf(msg,"Falsely explicit vr file (%04x,%04x)\n",
1541 Entry->GetGroup(),Entry->GetElement());
1542 dbg.Verbose(1, "gdcmDocument::FindVR: ",msg);
1543 if (Entry->GetGroup()%2 && Entry->GetElement() == 0x0000) { // Group length is UL !
1544 gdcmDictEntry* NewEntry = NewVirtualDictEntry(
1545 Entry->GetGroup(),Entry->GetElement(),
1546 "UL","FIXME","Group Length");
1547 Entry->SetDictEntry(NewEntry);
1552 if ( Entry->IsVRUnknown() )
1554 // When not a dictionary entry, we can safely overwrite the VR.
1555 if (Entry->GetElement() == 0x0000) { // Group length is UL !
1561 else if ( Entry->GetVR() != vr )
1563 // The VR present in the file and the dictionary disagree. We assume
1564 // the file writer knew best and use the VR of the file. Since it would
1565 // be unwise to overwrite the VR of a dictionary (since it would
1566 // compromise it's next user), we need to clone the actual DictEntry
1567 // and change the VR for the read one.
1568 gdcmDictEntry* NewEntry = NewVirtualDictEntry(
1569 Entry->GetGroup(),Entry->GetElement(),
1570 vr,"FIXME",Entry->GetName());
1571 Entry->SetDictEntry(NewEntry);
1577 * \brief Get the transformed value of the header entry. The VR value
1578 * is used to define the transformation to operate on the value
1579 * \warning NOT end user intended method !
1581 * @return Transformed entry value
1583 std::string gdcmDocument::GetDocEntryValue(gdcmDocEntry *Entry)
1585 if ( (IsDocEntryAnInteger(Entry)) && (Entry->IsImplicitVR()) )
1587 std::string val=((gdcmValEntry *)Entry)->GetValue();
1588 std::string vr=Entry->GetVR();
1589 guint32 length = Entry->GetLength();
1590 std::ostringstream s;
1593 // When short integer(s) are expected, read and convert the following
1594 // n * 2 bytes properly i.e. as a multivaluated strings
1595 // (each single value is separated fromthe next one by '\'
1596 // as usual for standard multivaluated filels
1597 // Elements with Value Multiplicity > 1
1598 // contain a set of short integers (not a single one)
1600 if (vr == "US" || vr == "SS")
1605 for (int i=0; i < nbInt; i++)
1609 NewInt16 = (val[2*i+0]&0xFF)+((val[2*i+1]&0xFF)<<8);
1610 NewInt16 = SwapShort(NewInt16);
1615 // When integer(s) are expected, read and convert the following
1616 // n * 4 bytes properly i.e. as a multivaluated strings
1617 // (each single value is separated fromthe next one by '\'
1618 // as usual for standard multivaluated filels
1619 // Elements with Value Multiplicity > 1
1620 // contain a set of integers (not a single one)
1621 else if (vr == "UL" || vr == "SL")
1626 for (int i=0; i < nbInt; i++)
1630 NewInt32= (val[4*i+0]&0xFF)+((val[4*i+1]&0xFF)<<8)+
1631 ((val[4*i+2]&0xFF)<<16)+((val[4*i+3]&0xFF)<<24);
1632 NewInt32=SwapLong(NewInt32);
1636 #ifdef GDCM_NO_ANSI_STRING_STREAM
1637 s << std::ends; // to avoid oddities on Solaris
1638 #endif //GDCM_NO_ANSI_STRING_STREAM
1642 return(((gdcmValEntry *)Entry)->GetValue());
1646 * \brief Get the reverse transformed value of the header entry. The VR
1647 * value is used to define the reverse transformation to operate on
1649 * \warning NOT end user intended method !
1651 * @return Reverse transformed entry value
1653 std::string gdcmDocument::GetDocEntryUnvalue(gdcmDocEntry *Entry)
1655 if ( (IsDocEntryAnInteger(Entry)) && (Entry->IsImplicitVR()) )
1657 std::string vr=Entry->GetVR();
1658 std::ostringstream s;
1659 std::vector<std::string> tokens;
1661 if (vr == "US" || vr == "SS")
1665 tokens.erase(tokens.begin(),tokens.end()); // clean any previous value
1666 Tokenize (((gdcmValEntry *)Entry)->GetValue(), tokens, "\\");
1667 for (unsigned int i=0; i<tokens.size();i++)
1669 NewInt16 = atoi(tokens[i].c_str());
1670 s<<(NewInt16&0xFF)<<((NewInt16>>8)&0xFF);
1674 if (vr == "UL" || vr == "SL")
1678 tokens.erase(tokens.begin(),tokens.end()); // clean any previous value
1679 Tokenize (((gdcmValEntry *)Entry)->GetValue(), tokens, "\\");
1680 for (unsigned int i=0; i<tokens.size();i++)
1682 NewInt32 = atoi(tokens[i].c_str());
1683 s<<(char)(NewInt32&0xFF)<<(char)((NewInt32>>8)&0xFF)
1684 <<(char)((NewInt32>>16)&0xFF)<<(char)((NewInt32>>24)&0xFF);
1689 #ifdef GDCM_NO_ANSI_STRING_STREAM
1690 s << std::ends; // to avoid oddities on Solaris
1691 #endif //GDCM_NO_ANSI_STRING_STREAM
1695 return(((gdcmValEntry *)Entry)->GetValue());
1699 * \brief Skip a given Header Entry
1700 * \warning NOT end user intended method !
1703 void gdcmDocument::SkipDocEntry(gdcmDocEntry *entry)
1705 SkipBytes(entry->GetLength());
1709 * \brief Skips to the begining of the next Header Entry
1710 * \warning NOT end user intended method !
1713 void gdcmDocument::SkipToNextDocEntry(gdcmDocEntry *entry)
1715 (void)fseek(fp, (long)(entry->GetOffset()), SEEK_SET);
1716 (void)fseek(fp, (long)(entry->GetReadLength()), SEEK_CUR);
1720 * \brief Loads the value for a a given VLEntry
1721 * \warning NOT end user intended method !
1724 void gdcmDocument::LoadVLEntry(gdcmDocEntry *entry)
1726 //SkipBytes(entry->GetLength());
1727 LoadDocEntry(entry);
1730 * \brief When the length of an element value is obviously wrong (because
1731 * the parser went Jabberwocky) one can hope improving things by
1732 * applying this heuristic.
1734 void gdcmDocument::FixDocEntryFoundLength(gdcmDocEntry *Entry, guint32 FoundLength)
1736 Entry->SetReadLength(FoundLength); // will be updated only if a bug is found
1737 if ( FoundLength == 0xffffffff) {
1741 guint16 gr =Entry->GetGroup();
1742 guint16 el =Entry->GetElement();
1744 if (FoundLength%2) {
1745 std::ostringstream s;
1746 s << "Warning : Tag with uneven length " << FoundLength
1747 << " in x(" << std::hex << gr << "," << el <<")" << std::dec;
1748 dbg.Verbose(0,s.str().c_str());
1751 // Sorry for the patch!
1752 // XMedCom did the trick to read some naughty GE images ...
1753 if (FoundLength == 13) {
1754 // The following 'if' will be removed when there is no more
1755 // images on Creatis HDs with a 13 length for Manufacturer...
1756 if ( (Entry->GetGroup() != 0x0008) ||
1757 ( (Entry->GetElement() != 0x0070) && (Entry->GetElement() != 0x0080) ) ){
1758 // end of remove area
1760 Entry->SetReadLength(10); // a bug is to be fixed
1764 // to fix some garbage 'Leonardo' Siemens images
1765 // May be commented out to avoid overhead
1766 else if ( (Entry->GetGroup() == 0x0009) &&
1767 ( (Entry->GetElement() == 0x1113) || (Entry->GetElement() == 0x1114) ) ){
1769 Entry->SetReadLength(4); // a bug is to be fixed
1773 // to try to 'go inside' SeQuences (with length), and not to skip them
1774 else if ( Entry->GetVR() == "SQ")
1776 if (enableSequences) // only if the user does want to !
1777 FoundLength =0; // ReadLength is unchanged
1780 // we found a 'delimiter' element
1781 // fffe|xxxx is just a marker, we don't take its length into account
1782 else if(Entry->GetGroup() == 0xfffe)
1784 // *normally, fffe|0000 doesn't exist !
1785 if( Entry->GetElement() != 0x0000 ) // gdcm-MR-PHILIPS-16-Multi-Seq.dcm
1786 // causes extra troubles :-(
1790 Entry->SetUsableLength(FoundLength);
1794 * \brief Apply some heuristics to predict whether the considered
1795 * element value contains/represents an integer or not.
1796 * @param Entry The element value on which to apply the predicate.
1797 * @return The result of the heuristical predicate.
1799 bool gdcmDocument::IsDocEntryAnInteger(gdcmDocEntry *Entry) {
1800 guint16 element = Entry->GetElement();
1801 guint16 group = Entry->GetGroup();
1802 std::string vr = Entry->GetVR();
1803 guint32 length = Entry->GetLength();
1804 // When we have some semantics on the element we just read, and if we
1805 // a priori know we are dealing with an integer, then we shall be
1806 // able to swap it's element value properly.
1807 if ( element == 0 ) // This is the group length of the group
1813 std::ostringstream s;
1814 int filePosition = ftell(fp);
1815 s << "Erroneous Group Length element length on : (" \
1816 << std::hex << group << " , " << element
1817 << ") -before- position x(" << filePosition << ")"
1818 << "lgt : " << length;
1819 // These 2 lines commented out : a *very dirty* patch
1820 // to go on PrintHeader'ing gdcm-MR-PHILIPS-16-Multi-Seq.dcm.
1821 // have a glance at offset x(8336) ...
1822 // For *regular* headers, the test is useless..
1823 // lets's print a warning message and go on,
1824 // instead of giving up with an error message
1826 //std::cout << s.str().c_str() << std::endl;
1827 // dbg.Error("gdcmDocument::IsDocEntryAnInteger",
1828 // s.str().c_str());
1831 if ( (vr == "UL") || (vr == "US") || (vr == "SL") || (vr == "SS") )
1837 * \brief Find the Length till the next sequence delimiter
1838 * \warning NOT end user intended method !
1842 guint32 gdcmDocument::FindDocEntryLengthOB(void) {
1843 // See PS 3.5-2001, section A.4 p. 49 on encapsulation of encoded pixel data.
1846 long PositionOnEntry = ftell(fp);
1847 bool FoundSequenceDelimiter = false;
1848 guint32 TotalLength = 0;
1851 while ( ! FoundSequenceDelimiter)
1857 TotalLength += 4; // We even have to decount the group and element
1859 if ( g != 0xfffe && g!=0xb00c ) //for bogus header
1861 char msg[100]; // for sprintf. Sorry
1862 sprintf(msg,"wrong group (%04x) for an item sequence (%04x,%04x)\n",g, g,n);
1863 dbg.Verbose(1, "gdcmDocument::FindLengthOB: ",msg);
1867 if ( n == 0xe0dd || ( g==0xb00c && n==0x0eb6 ) ) // for bogus header
1868 FoundSequenceDelimiter = true;
1869 else if ( n != 0xe000 )
1871 char msg[100]; // for sprintf. Sorry
1872 sprintf(msg,"wrong element (%04x) for an item sequence (%04x,%04x)\n",
1874 dbg.Verbose(1, "gdcmDocument::FindLengthOB: ",msg);
1878 ItemLength = ReadInt32();
1879 TotalLength += ItemLength + 4; // We add 4 bytes since we just read
1880 // the ItemLength with ReadInt32
1881 SkipBytes(ItemLength);
1883 fseek(fp, PositionOnEntry, SEEK_SET);
1888 * \brief Reads a supposed to be 16 Bits integer
1889 * (swaps it depending on processor endianity)
1890 * @return read value
1892 guint16 gdcmDocument::ReadInt16(void) {
1895 item_read = fread (&g, (size_t)2,(size_t)1, fp);
1896 if ( item_read != 1 ) {
1898 dbg.Verbose(0, "gdcmDocument::ReadInt16", " File Error");
1908 * \brief Reads a supposed to be 32 Bits integer
1909 * (swaps it depending on processor endianity)
1910 * @return read value
1912 guint32 gdcmDocument::ReadInt32(void) {
1915 item_read = fread (&g, (size_t)4,(size_t)1, fp);
1916 if ( item_read != 1 ) {
1918 dbg.Verbose(0, "gdcmDocument::ReadInt32", " File Error");
1928 * \brief skips bytes inside the source file
1929 * \warning NOT end user intended method !
1932 void gdcmDocument::SkipBytes(guint32 NBytes) {
1933 //FIXME don't dump the returned value
1934 (void)fseek(fp, (long)NBytes, SEEK_CUR);
1938 * \brief Loads all the needed Dictionaries
1939 * \warning NOT end user intended method !
1941 void gdcmDocument::Initialise(void)
1943 RefPubDict = gdcmGlobal::GetDicts()->GetDefaultPubDict();
1944 RefShaDict = (gdcmDict*)0;
1948 * \brief Discover what the swap code is (among little endian, big endian,
1949 * bad little endian, bad big endian).
1951 * @return false when we are absolutely sure
1952 * it's neither ACR-NEMA nor DICOM
1953 * true when we hope ours assuptions are OK
1955 bool gdcmDocument::CheckSwap() {
1957 // The only guaranted way of finding the swap code is to find a
1958 // group tag since we know it's length has to be of four bytes i.e.
1959 // 0x00000004. Finding the swap code in then straigthforward. Trouble
1960 // occurs when we can't find such group...
1962 guint32 x=4; // x : for ntohs
1963 bool net2host; // true when HostByteOrder is the same as NetworkByteOrder
1969 char deb[HEADER_LENGTH_TO_READ];
1971 // First, compare HostByteOrder and NetworkByteOrder in order to
1972 // determine if we shall need to swap bytes (i.e. the Endian type).
1978 // The easiest case is the one of a DICOM header, since it possesses a
1979 // file preamble where it suffice to look for the string "DICM".
1980 lgrLue = fread(deb, 1, HEADER_LENGTH_TO_READ, fp);
1983 if(memcmp(entCur, "DICM", (size_t)4) == 0) {
1984 dbg.Verbose(1, "gdcmDocument::CheckSwap:", "looks like DICOM Version3");
1986 // Next, determine the value representation (VR). Let's skip to the
1987 // first element (0002, 0000) and check there if we find "UL"
1988 // - or "OB" if the 1st one is (0002,0001) -,
1989 // in which case we (almost) know it is explicit VR.
1990 // WARNING: if it happens to be implicit VR then what we will read
1991 // is the length of the group. If this ascii representation of this
1992 // length happens to be "UL" then we shall believe it is explicit VR.
1993 // FIXME: in order to fix the above warning, we could read the next
1994 // element value (or a couple of elements values) in order to make
1995 // sure we are not commiting a big mistake.
1996 // We need to skip :
1997 // * the 128 bytes of File Preamble (often padded with zeroes),
1998 // * the 4 bytes of "DICM" string,
1999 // * the 4 bytes of the first tag (0002, 0000),or (0002, 0001)
2000 // i.e. a total of 136 bytes.
2004 // Sometimes (see : gdcmData/icone.dcm) group 0x0002 *is* Explicit VR,
2005 // but elem 0002,0010 (Transfert Syntax) tells us the file is
2006 // *Implicit* VR. -and it is !-
2008 if( (memcmp(entCur, "UL", (size_t)2) == 0) ||
2009 (memcmp(entCur, "OB", (size_t)2) == 0) ||
2010 (memcmp(entCur, "UI", (size_t)2) == 0) ||
2011 (memcmp(entCur, "CS", (size_t)2) == 0) ) // CS, to remove later
2012 // when Write DCM *adds*
2014 // Use gdcmDocument::dicom_vr to test all the possibilities
2015 // instead of just checking for UL, OB and UI !? group 0000
2017 filetype = gdcmExplicitVR;
2018 dbg.Verbose(1, "gdcmDocument::CheckSwap:",
2019 "explicit Value Representation");
2023 filetype = gdcmImplicitVR;
2024 dbg.Verbose(1, "gdcmDocument::CheckSwap:",
2025 "not an explicit Value Representation");
2031 dbg.Verbose(1, "gdcmDocument::CheckSwap:",
2032 "HostByteOrder != NetworkByteOrder");
2037 dbg.Verbose(1, "gdcmDocument::CheckSwap:",
2038 "HostByteOrder = NetworkByteOrder");
2041 // Position the file position indicator at first tag (i.e.
2042 // after the file preamble and the "DICM" string).
2044 fseek (fp, 132L, SEEK_SET);
2048 // Alas, this is not a DicomV3 file and whatever happens there is no file
2049 // preamble. We can reset the file position indicator to where the data
2050 // is (i.e. the beginning of the file).
2051 dbg.Verbose(1, "gdcmDocument::CheckSwap:", "not a DICOM Version3 file");
2054 // Our next best chance would be to be considering a 'clean' ACR/NEMA file.
2055 // By clean we mean that the length of the first tag is written down.
2056 // If this is the case and since the length of the first group HAS to be
2057 // four (bytes), then determining the proper swap code is straightforward.
2060 // We assume the array of char we are considering contains the binary
2061 // representation of a 32 bits integer. Hence the following dirty
2063 s32 = *((guint32 *)(entCur));
2084 // We are out of luck. It is not a DicomV3 nor a 'clean' ACR/NEMA file.
2085 // It is time for despaired wild guesses.
2086 // So, let's check if this file wouldn't happen to be 'dirty' ACR/NEMA,
2087 // i.e. the 'group length' element is not present :
2089 // check the supposed to be 'group number'
2090 // 0x0002 or 0x0004 or 0x0008
2091 // to determine ' sw' value .
2092 // Only 0 or 4321 will be possible
2093 // (no oportunity to check for the formerly well known
2094 // ACR-NEMA 'Bad Big Endian' or 'Bad Little Endian'
2095 // if unsuccessfull (i.e. neither 0x0002 nor 0x0200 etc -4, 8-)
2096 // the file IS NOT ACR-NEMA nor DICOM V3
2097 // Find a trick to tell it the caller...
2099 s16 = *((guint16 *)(deb));
2115 dbg.Verbose(0, "gdcmDocument::CheckSwap:",
2116 "ACR/NEMA unfound swap info (Really hopeless !)");
2117 filetype = gdcmUnknown;
2121 // Then the only info we have is the net2host one.
2131 * \brief Restore the unproperly loaded values i.e. the group, the element
2132 * and the dictionary entry depending on them.
2134 void gdcmDocument::SwitchSwapToBigEndian(void)
2136 dbg.Verbose(1, "gdcmDocument::SwitchSwapToBigEndian",
2137 "Switching to BigEndian mode.");
2158 * \brief during parsing, Header Elements too long are not loaded in memory
2161 void gdcmDocument::SetMaxSizeLoadEntry(long NewSize)
2165 if ((guint32)NewSize >= (guint32)0xffffffff)
2167 MaxSizeLoadEntry = 0xffffffff;
2170 MaxSizeLoadEntry = NewSize;
2175 * \brief Header Elements too long will not be printed
2176 * \todo See comments of \ref gdcmDocument::MAX_SIZE_PRINT_ELEMENT_VALUE
2179 void gdcmDocument::SetMaxSizePrintEntry(long NewSize)
2183 if ((guint32)NewSize >= (guint32)0xffffffff)
2185 MaxSizePrintEntry = 0xffffffff;
2188 MaxSizePrintEntry = NewSize;
2194 * \brief Read the next tag but WITHOUT loading it's value
2195 * (read the 'Group Number', the 'Element Number',
2196 * gets the Dict Entry
2197 * gets the VR, gets the length, gets the offset value)
2198 * @return On succes the newly created DocEntry, NULL on failure.
2200 gdcmDocEntry *gdcmDocument::ReadNextDocEntry(void) {
2202 gdcmDocEntry *NewEntry;
2207 // We reached the EOF (or an error occured) therefore
2208 // header parsing has to be considered as finished.
2209 return (gdcmDocEntry *)0;
2211 // Pb : how to propagate the element length (used in SkipDocEntry)
2212 // direct call to SkipBytes ?
2214 // if (ignoreShadow == 1 && g%2 ==1)
2215 // if user wants to skip shadow groups
2216 // and current element *is* a shadow element
2217 // we don't create anything
2218 // return (gdcmDocEntry *)1; // to tell caller it's NOT finished
2220 NewEntry = NewDocEntryByNumber(g, n);
2221 FindDocEntryVR(NewEntry);
2222 FindDocEntryLength(NewEntry);
2229 NewEntry->SetOffset(ftell(fp));
2234 * \brief Build a new Element Value from all the low level arguments.
2235 * Check for existence of dictionary entry, and build
2236 * a default one when absent.
2237 * @param Name Name of the underlying DictEntry
2239 gdcmDocEntry *gdcmDocument::NewDocEntryByName(std::string Name)
2241 gdcmDictEntry *NewTag = GetDictEntryByName(Name);
2243 NewTag = NewVirtualDictEntry(0xffff, 0xffff, "LO", "unkn", Name);
2245 gdcmDocEntry* NewEntry = new gdcmDocEntry(NewTag);
2248 dbg.Verbose(1, "gdcmDocument::ObtainDocEntryByName",
2249 "failed to allocate gdcmDocEntry");
2250 return (gdcmDocEntry *)0;
2256 * \brief Request a new virtual dict entry to the dict set
2257 * @param group group number of the underlying DictEntry
2258 * @param element element number of the underlying DictEntry
2259 * @param vr VR of the underlying DictEntry
2260 * @param fourth owner group
2261 * @param name english name
2263 gdcmDictEntry *gdcmDocument::NewVirtualDictEntry(guint16 group, guint16 element,
2268 return gdcmGlobal::GetDicts()->NewVirtualDictEntry(group,element,vr,fourth,name);
2272 * \brief Build a new Element Value from all the low level arguments.
2273 * Check for existence of dictionary entry, and build
2274 * a default one when absent.
2275 * @param Group group number of the underlying DictEntry
2276 * @param Elem element number of the underlying DictEntry
2278 gdcmDocEntry *gdcmDocument::NewDocEntryByNumber(guint16 Group, guint16 Elem)
2280 // Find out if the tag we encountered is in the dictionaries:
2281 gdcmDictEntry *DictEntry = GetDictEntryByNumber(Group, Elem);
2283 DictEntry = NewVirtualDictEntry(Group, Elem);
2285 gdcmDocEntry *NewEntry = new gdcmDocEntry(DictEntry);
2288 dbg.Verbose(1, "gdcmDocument::NewDocEntryByNumber",
2289 "failed to allocate gdcmDocEntry");
2295 /// \todo Never used; commented out, waiting for removal.
2297 * \brief Small utility function that creates a new manually crafted
2298 * (as opposed as read from the file) gdcmDocEntry with user
2299 * specified name and adds it to the public tag hash table.
2300 * \note A fake TagKey is generated so the PubDict can keep it's coherence.
2301 * @param NewTagName The name to be given to this new tag.
2302 * @param VR The Value Representation to be given to this new tag.
2303 * @return The newly hand crafted Element Value.
2305 //gdcmDocEntry *gdcmDocument::NewManualDocEntryToPubDict(std::string NewTagName,
2308 // gdcmDocEntry *NewEntry = NULL;
2309 // guint32 StuffGroup = 0xffff; // Group to be stuffed with additional info
2310 // guint32 FreeElem = 0;
2311 // gdcmDictEntry *DictEntry = NULL;
2313 // FreeElem = GenerateFreeTagKeyInGroup(StuffGroup);
2314 // if (FreeElem == UINT32_MAX)
2316 // dbg.Verbose(1, "gdcmHeader::NewManualDocEntryToPubDict",
2317 // "Group 0xffff in Public Dict is full");
2321 // DictEntry = NewVirtualDictEntry(StuffGroup, FreeElem,
2322 // VR, "GDCM", NewTagName);
2323 // NewEntry = new gdcmDocEntry(DictEntry);
2324 // AddEntry(NewEntry);
2329 * \brief Generate a free TagKey i.e. a TagKey that is not present
2330 * in the TagHt dictionary.
2331 * @param group The generated tag must belong to this group.
2332 * @return The element of tag with given group which is fee.
2334 guint32 gdcmDocument::GenerateFreeTagKeyInGroup(guint16 group)
2336 for (guint32 elem = 0; elem < UINT32_MAX; elem++)
2338 TagKey key = gdcmDictEntry::TranslateToKey(group, elem);
2339 if (tagHT.count(key) == 0)
2347 * \brief Searches both the public and the shadow dictionary (when they
2348 * exist) for the presence of the DictEntry with given name.
2349 * The public dictionary has precedence on the shadow one.
2350 * @param Name name of the searched DictEntry
2351 * @return Corresponding DictEntry when it exists, NULL otherwise.
2353 gdcmDictEntry *gdcmDocument::GetDictEntryByName(std::string Name)
2355 gdcmDictEntry *found = (gdcmDictEntry *)0;
2356 if (!RefPubDict && !RefShaDict)
2358 dbg.Verbose(0, "gdcmDocument::GetDictEntry",
2359 "we SHOULD have a default dictionary");
2363 found = RefPubDict->GetDictEntryByName(Name);
2369 found = RefShaDict->GetDictEntryByName(Name);
2377 * \brief Searches both the public and the shadow dictionary (when they
2378 * exist) for the presence of the DictEntry with given
2379 * group and element. The public dictionary has precedence on the
2381 * @param group group of the searched DictEntry
2382 * @param element element of the searched DictEntry
2383 * @return Corresponding DictEntry when it exists, NULL otherwise.
2385 gdcmDictEntry *gdcmDocument::GetDictEntryByNumber(guint16 group,guint16 element)
2387 gdcmDictEntry *found = (gdcmDictEntry *)0;
2388 if (!RefPubDict && !RefShaDict)
2390 dbg.Verbose(0, "gdcmDocument::GetDictEntry",
2391 "we SHOULD have a default dictionary");
2395 found = RefPubDict->GetDictEntryByNumber(group, element);
2401 found = RefShaDict->GetDictEntryByNumber(group, element);
2410 * \ingroup gdcmDocument
2411 * \brief Parse pixel data from disk for multi-fragment Jpeg/Rle files
2412 * \ No other way so 'skip' the Data
2415 void gdcmDocument::Parse7FE0 (void) {
2417 gdcmDocEntry* Element = GetDocEntryByNumber(0x0002, 0x0010);
2421 std::string Transfer = ((gdcmValEntry *)Element)->GetValue();
2422 if (Transfer == UI1_2_840_10008_1_2 )
2424 if ( Transfer == UI1_2_840_10008_1_2_1 )
2426 if ( Transfer == UI1_2_840_10008_1_2_2 ) //1.2.2 ??? A verifier !
2428 if ( Transfer == UI1_2_840_10008_1_2_1_99 )
2432 std::string str_nb=GetEntryByNumber(0x0028,0x0100);
2433 if (str_nb == GDCM_UNFOUND ) {
2436 nb = atoi(str_nb.c_str() );
2437 if (nb == 12) nb =16;
2440 guint16 ItemTagGr,ItemTagEl;
2444 // -------------------- for Parsing : Position on begining of Jpeg/RLE Pixels
2446 if ( Transfer != UI1_1_2_840_10008_1_2_5 ) { // !RLELossLessTransferSyntax
2449 fread(&ItemTagGr,2,1,fp); //Reading (fffe):Basic Offset Table Item Tag Gr
2450 fread(&ItemTagEl,2,1,fp); //Reading (e000):Basic Offset Table Item Tag El
2452 ItemTagGr=SwapShort(ItemTagGr);
2453 ItemTagEl=SwapShort(ItemTagEl);
2455 printf ("at %x : ItemTag (should be fffe,e000): %04x,%04x\n",
2456 (unsigned)ftellRes,ItemTagGr,ItemTagEl );
2460 ln=SwapLong(ln); // Basic Offset Table Item Length
2461 printf("at %x : Basic Offset Table Item Length (\?\?) %d x(%08x)\n",
2462 (unsigned)ftellRes,ln,ln);
2464 // What is it used for ??
2465 char * BasicOffsetTableItemValue= new char[ln+1];
2466 fread(BasicOffsetTableItemValue,ln,1,fp);
2468 for (int i=0;i<ln;i+=4){
2469 a=str2num(&BasicOffsetTableItemValue[i],guint32);
2470 printf(" x(%08x) %d\n",a,a);
2475 fread(&ItemTagGr,2,1,fp); // Reading (fffe) : Item Tag Gr
2476 fread(&ItemTagEl,2,1,fp); // Reading (e000) : Item Tag El
2478 ItemTagGr=SwapShort(ItemTagGr);
2479 ItemTagEl=SwapShort(ItemTagEl);
2481 printf ("at %x : ItemTag (should be fffe,e000 or e0dd): %04x,%04x\n",
2482 (unsigned)ftellRes,ItemTagGr,ItemTagEl );
2484 while ( ( ItemTagGr==0xfffe) && (ItemTagEl!=0xe0dd) ) { // Parse fragments
2489 ln=SwapLong(ln); // length
2490 printf(" at %x : fragment length %d x(%08x)\n",
2491 (unsigned)ftellRes, ln,ln);
2493 // ------------------------
2494 fseek(fp,ln,SEEK_CUR); // skipping (not reading) fragment pixels
2495 // ------------------------
2498 fread(&ItemTagGr,2,1,fp); // Reading (fffe) : Item Tag Gr
2499 fread(&ItemTagEl,2,1,fp); // Reading (e000) : Item Tag El
2501 ItemTagGr=SwapShort(ItemTagGr);
2502 ItemTagEl=SwapShort(ItemTagEl);
2504 printf ("at %x : ItemTag (should be fffe,e000 or e0dd): %04x,%04x\n",
2505 (unsigned)ftellRes,ItemTagGr,ItemTagEl );
2511 long RleSegmentLength[15],fragmentLength;
2512 guint32 nbRleSegments;
2513 guint32 RleSegmentOffsetTable[15];
2515 // Basic Offset Table with Item Value
2517 fread(&ItemTagGr,2,1,fp); //Reading (fffe):Basic Offset Table Item Tag Gr
2518 fread(&ItemTagEl,2,1,fp); //Reading (e000):Basic Offset Table Item Tag El
2520 ItemTagGr=SwapShort(ItemTagGr);
2521 ItemTagEl=SwapShort(ItemTagEl);
2523 printf ("at %x : ItemTag (should be fffe,e000): %04x,%04x\n",
2524 (unsigned)ftellRes,ItemTagGr,ItemTagEl );
2529 ln=SwapLong(ln); // Basic Offset Table Item Length
2530 printf("at %x : Basic Offset Table Item Length (\?\?) %d x(%08x)\n",
2531 (unsigned)ftellRes,ln,ln);
2533 // What is it used for ??
2534 char * BasicOffsetTableItemValue= new char[ln+1];
2535 fread(BasicOffsetTableItemValue,ln,1,fp);
2537 for (int i=0;i<ln;i+=4){
2538 a=str2num(&BasicOffsetTableItemValue[i],guint32);
2539 printf(" x(%08x) %d\n",a,a);
2544 fread(&ItemTagGr,2,1,fp); // Reading (fffe) : Item Tag Gr
2545 fread(&ItemTagEl,2,1,fp); // Reading (e000) : Item Tag El
2547 ItemTagGr=SwapShort(ItemTagGr);
2548 ItemTagEl=SwapShort(ItemTagEl);
2550 printf ("at %x : ItemTag (should be fffe,e000 or e0dd): %04x,%04x\n",
2551 (unsigned)ftellRes,ItemTagGr,ItemTagEl );
2553 // while 'Sequence Delimiter Item' (fffe,e0dd) not found
2554 while ( ( ItemTagGr == 0xfffe) && (ItemTagEl != 0xe0dd) ) {
2555 // Parse fragments of the current Fragment (Frame)
2557 fread(&fragmentLength,4,1,fp);
2559 fragmentLength=SwapLong(fragmentLength); // length
2560 printf(" at %x : 'fragment' length %d x(%08x)\n",
2561 (unsigned)ftellRes, (unsigned)fragmentLength,(unsigned)fragmentLength);
2563 //------------------ scanning (not reading) fragment pixels
2565 fread(&nbRleSegments,4,1,fp); // Reading : Number of RLE Segments
2567 nbRleSegments=SwapLong(nbRleSegments);
2568 printf(" Nb of RLE Segments : %d\n",nbRleSegments);
2570 for(int k=1; k<=15; k++) { // Reading RLE Segments Offset Table
2572 fread(&RleSegmentOffsetTable[k],4,1,fp);
2574 RleSegmentOffsetTable[k]=SwapLong(RleSegmentOffsetTable[k]);
2575 printf(" at : %x Offset Segment %d : %d (%x)\n",
2576 (unsigned)ftellRes,k,RleSegmentOffsetTable[k],
2577 RleSegmentOffsetTable[k]);
2580 if (nbRleSegments>1) { // skipping (not reading) RLE Segments
2581 for(unsigned int k=1; k<=nbRleSegments-1; k++) {
2582 RleSegmentLength[k]= RleSegmentOffsetTable[k+1]
2583 - RleSegmentOffsetTable[k];
2585 printf (" Segment %d : Length = %d x(%x) Start at %x\n",
2586 k,(unsigned)RleSegmentLength[k],(unsigned)RleSegmentLength[k], (unsigned)ftellRes);
2587 fseek(fp,RleSegmentLength[k],SEEK_CUR);
2590 RleSegmentLength[nbRleSegments]= fragmentLength
2591 - RleSegmentOffsetTable[nbRleSegments];
2593 printf (" Segment %d : Length = %d x(%x) Start at %x\n",
2594 nbRleSegments,(unsigned)RleSegmentLength[nbRleSegments],
2595 (unsigned)RleSegmentLength[nbRleSegments],(unsigned)ftellRes);
2597 fseek(fp,RleSegmentLength[nbRleSegments],SEEK_CUR);
2599 // ------------------ end of scanning fragment pixels
2602 fread(&ItemTagGr,2,1,fp); // Reading (fffe) : Item Tag Gr
2603 fread(&ItemTagEl,2,1,fp); // Reading (e000) : Item Tag El
2605 ItemTagGr=SwapShort(ItemTagGr);
2606 ItemTagEl=SwapShort(ItemTagEl);
2608 printf ("at %x : ItemTag (should be fffe,e000 or e0dd): %04x,%04x\n",
2609 (unsigned)ftellRes,ItemTagGr,ItemTagEl );
2617 //-----------------------------------------------------------------------------