7 #include <netinet/in.h>
9 #include <cctype> // for isalpha
14 #define HEADER_LENGHT_TO_READ 256 // on ne lit plus que le debut
17 struct FileReadError {
18 FileReadError(FILE* fp, const char* Mesg) {
20 dbg.Verbose(1, "EOF encountered :", Mesg);
22 dbg.Verbose(1, "Error on reading :", Mesg);
27 //FIXME: this looks dirty to me...
28 #define str2num(str, typeNum) *((typeNum *)(str))
30 VRHT * gdcmHeader::dicom_vr = (VRHT*)0;
31 gdcmDictSet* gdcmHeader::Dicts = new gdcmDictSet();
33 void gdcmHeader::Initialise(void) {
34 if (!gdcmHeader::dicom_vr)
36 RefPubDict = gdcmHeader::Dicts->GetDefaultPublicDict();
37 RefShaDict = (gdcmDict*)0;
40 gdcmHeader::gdcmHeader (const char* InFilename) {
41 SetMaxSizeLoadElementValue(1024);
42 filename = InFilename;
44 fp=fopen(InFilename,"rw");
45 dbg.Error(!fp, "gdcmHeader::gdcmHeader cannot open file", InFilename);
49 gdcmHeader::~gdcmHeader (void) {
54 void gdcmHeader::InitVRDict (void) {
56 dbg.Verbose(0, "gdcmHeader::InitVRDict:", "VR dictionary allready set");
60 (*vr)["AE"] = "Application Entity"; // At most 16 bytes
61 (*vr)["AS"] = "Age String"; // Exactly 4 bytes
62 (*vr)["AT"] = "Attribute Tag"; // 2 16-bit unsigned short integers
63 (*vr)["CS"] = "Code String"; // At most 16 bytes
64 (*vr)["DA"] = "Date"; // Exactly 8 bytes
65 (*vr)["DS"] = "Decimal String"; // At most 16 bytes
66 (*vr)["DT"] = "Date Time"; // At most 26 bytes
67 (*vr)["FL"] = "Floating Point Single"; // 32-bit IEEE 754:1985 float
68 (*vr)["FD"] = "Floating Point Double"; // 64-bit IEEE 754:1985 double
69 (*vr)["IS"] = "Integer String"; // At most 12 bytes
70 (*vr)["LO"] = "Long String"; // At most 64 chars
71 (*vr)["LT"] = "Long Text"; // At most 10240 chars
72 (*vr)["OB"] = "Other Byte String"; // String of bytes (vr independant)
73 (*vr)["OW"] = "Other Word String"; // String of 16-bit words (vr dep)
74 (*vr)["PN"] = "Person Name"; // At most 64 chars
75 (*vr)["SH"] = "Short String"; // At most 16 chars
76 (*vr)["SL"] = "Signed Long"; // Exactly 4 bytes
77 (*vr)["SQ"] = "Sequence of Items"; // Not Applicable
78 (*vr)["SS"] = "Signed Short"; // Exactly 2 bytes
79 (*vr)["ST"] = "Short Text"; // At most 1024 chars
80 (*vr)["TM"] = "Time"; // At most 16 bytes
81 (*vr)["UI"] = "Unique Identifier"; // At most 64 bytes
82 (*vr)["UL"] = "Unsigned Long "; // Exactly 4 bytes
83 (*vr)["UN"] = "Unknown"; // Any length of bytes
84 (*vr)["US"] = "Unsigned Short "; // Exactly 2 bytes
85 (*vr)["UT"] = "Unlimited Text"; // At most 2^32 -1 chars
91 * \brief Discover what the swap code is (among little endian, big endian,
92 * bad little endian, bad big endian).
94 void gdcmHeader::CheckSwap()
96 // The only guaranted way of finding the swap code is to find a
97 // group tag since we know it's length has to be of four bytes i.e.
98 // 0x00000004. Finding the swap code in then straigthforward. Trouble
99 // occurs when we can't find such group...
101 guint32 x=4; // x : pour ntohs
102 bool net2host; // true when HostByteOrder is the same as NetworkByteOrder
106 char deb[HEADER_LENGHT_TO_READ];
108 // First, compare HostByteOrder and NetworkByteOrder in order to
109 // determine if we shall need to swap bytes (i.e. the Endian type).
115 // The easiest case is the one of a DICOM header, since it possesses a
116 // file preamble where it suffice to look for the sting "DICM".
117 lgrLue = fread(deb, 1, HEADER_LENGHT_TO_READ, fp);
120 if(memcmp(entCur, "DICM", (size_t)4) == 0) {
121 filetype = TrueDicom;
122 dbg.Verbose(1, "gdcmHeader::CheckSwap:", "looks like DICOM Version3");
125 dbg.Verbose(1, "gdcmHeader::CheckSwap:", "not a DICOM Version3 file");
128 if(filetype == TrueDicom) {
129 // Next, determine the value representation (VR). Let's skip to the
130 // first element (0002, 0000) and check there if we find "UL", in
131 // which case we (almost) know it is explicit VR.
132 // WARNING: if it happens to be implicit VR then what we will read
133 // is the length of the group. If this ascii representation of this
134 // length happens to be "UL" then we shall believe it is explicit VR.
135 // FIXME: in order to fix the above warning, we could read the next
136 // element value (or a couple of elements values) in order to make
137 // sure we are not commiting a big mistake.
139 // * the 128 bytes of File Preamble (often padded with zeroes),
140 // * the 4 bytes of "DICM" string,
141 // * the 4 bytes of the first tag (0002, 0000),
142 // i.e. a total of 136 bytes.
144 if(memcmp(entCur, "UL", (size_t)2) == 0) {
145 filetype = ExplicitVR;
146 dbg.Verbose(1, "gdcmHeader::CheckSwap:",
147 "explicit Value Representation");
149 filetype = ImplicitVR;
150 dbg.Verbose(1, "gdcmHeader::CheckSwap:",
151 "not an explicit Value Representation");
156 dbg.Verbose(1, "gdcmHeader::CheckSwap:",
157 "HostByteOrder != NetworkByteOrder");
160 dbg.Verbose(1, "gdcmHeader::CheckSwap:",
161 "HostByteOrder = NetworkByteOrder");
164 // Position the file position indicator at first tag (i.e.
165 // after the file preamble and the "DICM" string).
167 fseek (fp, 132L, SEEK_SET);
169 } // End of TrueDicom
171 // Alas, this is not a DicomV3 file and whatever happens there is no file
172 // preamble. We can reset the file position indicator to where the data
173 // is (i.e. the beginning of the file).
176 // Our next best chance would be to be considering a 'clean' ACR/NEMA file.
177 // By clean we mean that the length of the first tag is written down.
178 // If this is the case and since the length of the first group HAS to be
179 // four (bytes), then determining the proper swap code is straightforward.
182 s = str2num(entCur, guint32);
202 dbg.Verbose(0, "gdcmHeader::CheckSwap:",
203 "ACE/NEMA unfound swap info (time to raise bets)");
206 // We are out of luck. It is not a DicomV3 nor a 'clean' ACR/NEMA file.
207 // It is time for despaired wild guesses. So, let's assume this file
208 // happens to be 'dirty' ACR/NEMA, i.e. the length of the group is
209 // not present. Then the only info we have is the net2host one.
217 void gdcmHeader::SwitchSwapToBigEndian(void) {
218 dbg.Verbose(1, "gdcmHeader::SwitchSwapToBigEndian",
219 "Switching to BigEndian mode.");
237 * \ingroup gdcmHeader
238 * \brief Find the value representation of the current tag.
240 * @param sw code swap
241 * @param skippedLength pointeur sur nombre d'octets que l'on a saute qd
242 * la lecture est finie
243 * @param longueurLue pointeur sur longueur (en nombre d'octets)
245 * @return longueur retenue pour le champ
248 void gdcmHeader::FindVR( ElValue *ElVal) {
249 if (filetype != ExplicitVR)
255 long PositionOnEntry = ftell(fp);
256 // Warning: we believe this is explicit VR (Value Representation) because
257 // we used a heuristic that found "UL" in the first tag. Alas this
258 // doesn't guarantee that all the tags will be in explicit VR. In some
259 // cases (see e-film filtered files) one finds implicit VR tags mixed
260 // within an explicit VR file. Hence we make sure the present tag
261 // is in explicit VR and try to fix things if it happens not to be
263 bool RealExplicit = true;
265 lgrLue=fread (&VR, (size_t)2,(size_t)1, fp);
269 // Assume we are reading a falsely explicit VR file i.e. we reached
270 // a tag where we expect reading a VR but are in fact we read the
271 // first to bytes of the length. Then we will interogate (through find)
272 // the dicom_vr dictionary with oddities like "\004\0" which crashes
273 // both GCC and VC++ implentations of the STL map. Hence when the
274 // expected VR read happens to be non-ascii characters we consider
275 // we hit falsely explicit VR tag.
277 if ( (!isalpha(VR[0])) && (!isalpha(VR[1])) )
278 RealExplicit = false;
280 // CLEANME searching the dicom_vr at each occurence is expensive.
281 // PostPone this test in an optional integrity check at the end
282 // of parsing or only in debug mode.
283 if ( RealExplicit && !dicom_vr->count(vr) )
284 RealExplicit = false;
286 if ( RealExplicit ) {
287 if ( ElVal->IsVrUnknown() ) {
288 // When not a dictionary entry, we can safely overwrite the vr.
292 if ( ElVal->GetVR() == vr ) {
293 // The vr we just read and the dictionary agree. Nothing to do.
296 // The vr present in the file and the dictionary disagree. We assume
297 // the file writer knew best and use the vr of the file. Since it would
298 // be unwise to overwrite the vr of a dictionary (since it would
299 // compromise it's next user), we need to clone the actual DictEntry
300 // and change the vr for the read one.
301 gdcmDictEntry* NewTag = new gdcmDictEntry(ElVal->GetGroup(),
306 ElVal->SetDictEntry(NewTag);
310 // We thought this was explicit VR, but we end up with an
311 // implicit VR tag. Let's backtrack.
312 dbg.Verbose(1, "gdcmHeader::FindVR:", "Falsely explicit vr file");
313 fseek(fp, PositionOnEntry, SEEK_SET);
314 // When this element is known in the dictionary we shall use, e.g. for
315 // the semantics (see the usage of IsAnInteger), the vr proposed by the
316 // dictionary entry. Still we have to flag the element as implicit since
317 // we know now our assumption on expliciteness is not furfilled.
319 if ( ElVal->IsVrUnknown() )
320 ElVal->SetVR("Implicit");
321 ElVal->SetImplicitVr();
325 * \ingroup gdcmHeader
326 * \brief Determines if the Transfer Syntax was allready encountered
327 * and if it corresponds to a Big Endian one.
329 * @return True when big endian found. False in all other cases.
331 bool gdcmHeader::IsBigEndianTransferSyntax(void) {
332 ElValue* Element = PubElVals.GetElementByNumber(0x0002, 0x0010);
335 LoadElementValueSafe(Element);
336 string Transfer = Element->GetValue();
337 if ( Transfer == "1.2.840.10008.1.2.2" )
342 void gdcmHeader::FixFoundLength(ElValue * ElVal, guint32 FoudLength) {
343 // Heuristic: a final fix.
344 if ( FoudLength == 0xffffffff)
346 ElVal->SetLength(FoudLength);
349 guint32 gdcmHeader::FindLengthOB(void) {
350 // See PS 3.5-2001, section A.4 p. 49 on encapsulation of encoded pixel data.
353 long PositionOnEntry = ftell(fp);
354 bool FoundSequenceDelimiter = false;
355 guint32 TotalLength = 0;
358 while ( ! FoundSequenceDelimiter) {
361 TotalLength += 4; // We even have to decount the group and element
363 dbg.Verbose(1, "gdcmHeader::FindLengthOB: ",
364 "wrong group for an item sequence.");
365 throw Error::FileReadError(fp, "gdcmHeader::FindLengthOB");
368 FoundSequenceDelimiter = true;
369 else if ( n != 0xe000) {
370 dbg.Verbose(1, "gdcmHeader::FindLengthOB: ",
371 "wrong element for an item sequence.");
372 throw Error::FileReadError(fp, "gdcmHeader::FindLengthOB");
374 ItemLength = ReadInt32();
375 TotalLength += ItemLength + 4; // We add 4 bytes since we just read
376 // the ItemLength with ReadInt32
377 SkipBytes(ItemLength);
379 fseek(fp, PositionOnEntry, SEEK_SET);
383 void gdcmHeader::FindLength(ElValue * ElVal) {
384 guint16 element = ElVal->GetElement();
385 string vr = ElVal->GetVR();
388 if ( (filetype == ExplicitVR) && ! ElVal->IsImplicitVr() ) {
390 if ( (vr=="OB") || (vr=="OW") || (vr=="SQ") || (vr=="UN") ) {
391 // The following reserved two bytes (see PS 3.5-2001, section
392 // 7.1.2 Data element structure with explicit vr p27) must be
393 // skipped before proceeding on reading the length on 4 bytes.
394 fseek(fp, 2L, SEEK_CUR);
395 guint32 length32 = ReadInt32();
396 if ( (vr == "OB") && (length32 == 0xffffffff) ) {
397 ElVal->SetLength(FindLengthOB());
400 FixFoundLength(ElVal, length32);
404 // Length is encoded on 2 bytes.
405 length16 = ReadInt16();
407 // We can tell the current file is encoded in big endian (like
408 // Data/US-RGB-8-epicard) when we find the "Transfer Syntax" tag
409 // and it's value is the one of the encoding of a big endian file.
410 // In order to deal with such big endian encoded files, we have
411 // (at least) two strategies:
412 // * when we load the "Transfer Syntax" tag with value of big endian
413 // encoding, we raise the proper flags. Then we wait for the end
414 // of the META group (0x0002) among which is "Transfer Syntax",
415 // before switching the swap code to big endian. We have to postpone
416 // the switching of the swap code since the META group is fully encoded
417 // in little endian, and big endian coding only starts at the next
418 // group. The corresponding code can be hard to analyse and adds
419 // many additional unnecessary tests for regular tags.
420 // * the second strategy consist in waiting for trouble, that shall appear
421 // when we find the first group with big endian encoding. This is
422 // easy to detect since the length of a "Group Length" tag (the
423 // ones with zero as element number) has to be of 4 (0x0004). When we
424 // encouter 1024 (0x0400) chances are the encoding changed and we
425 // found a group with big endian encoding.
426 // We shall use this second strategy. In order make sure that we
427 // can interpret the presence of an apparently big endian encoded
428 // length of a "Group Length" without committing a big mistake, we
429 // add an additional check: we look in the allready parsed elements
430 // for the presence of a "Transfer Syntax" whose value has to be "big
431 // endian encoding". When this is the case, chances are we got our
432 // hands on a big endian encoded file: we switch the swap code to
433 // big endian and proceed...
434 if ( (element == 0) && (length16 == 1024) ) {
435 if ( ! IsBigEndianTransferSyntax() )
436 throw Error::FileReadError(fp, "gdcmHeader::FindLength");
438 SwitchSwapToBigEndian();
439 // Restore the unproperly loaded values i.e. the group, the element
440 // and the dictionary entry depending on them.
441 guint16 CorrectGroup = SwapShort(ElVal->GetGroup());
442 guint16 CorrectElem = SwapShort(ElVal->GetElement());
443 gdcmDictEntry * NewTag = IsInDicts(CorrectGroup, CorrectElem);
445 // This correct tag is not in the dictionary. Create a new one.
446 NewTag = new gdcmDictEntry(CorrectGroup, CorrectElem);
448 // FIXME this can create a memory leaks on the old entry that be
449 // left unreferenced.
450 ElVal->SetDictEntry(NewTag);
453 // Heuristic: well some files are really ill-formed.
454 if ( length16 == 0xffff) {
456 dbg.Verbose(0, "gdcmHeader::FindLength",
457 "Erroneous element length fixed.");
459 FixFoundLength(ElVal, (guint32)length16);
463 // Either implicit VR or a non DICOM conformal (see not below) explicit
464 // VR that ommited the VR of (at least) this element. Farts happen.
465 // [Note: according to the part 5, PS 3.5-2001, section 7.1 p25
466 // on Data elements "Implicit and Explicit VR Data Elements shall
467 // not coexist in a Data Set and Data Sets nested within it".]
468 // Length is on 4 bytes.
469 FixFoundLength(ElVal, ReadInt32());
473 * \ingroup gdcmHeader
474 * \brief Swaps back the bytes of 4-byte long integer accordingly to
477 * @return The suggested integer.
479 guint32 gdcmHeader::SwapLong(guint32 a) {
480 // FIXME: il pourrait y avoir un pb pour les entiers negatifs ...
485 a=( ((a<<24) & 0xff000000) | ((a<<8) & 0x00ff0000) |
486 ((a>>8) & 0x0000ff00) | ((a>>24) & 0x000000ff) );
490 a=( ((a<<16) & 0xffff0000) | ((a>>16) & 0x0000ffff) );
494 a=( ((a<<8) & 0xff00ff00) | ((a>>8) & 0x00ff00ff) );
497 dbg.Error(" gdcmHeader::SwapLong : unset swap code");
504 * \ingroup gdcmHeader
505 * \brief Swaps the bytes so they agree with the processor order
506 * @return The properly swaped 16 bits integer.
508 guint16 gdcmHeader::SwapShort(guint16 a) {
509 if ( (sw==4321) || (sw==2143) )
510 a =(((a<<8) & 0x0ff00) | ((a>>8)&0x00ff));
514 void gdcmHeader::SkipBytes(guint32 NBytes) {
515 //FIXME don't dump the returned value
516 (void)fseek(fp, (long)NBytes, SEEK_CUR);
519 void gdcmHeader::SkipElementValue(ElValue * ElVal) {
520 SkipBytes(ElVal->GetLength());
523 void gdcmHeader::SetMaxSizeLoadElementValue(long NewSize) {
526 if ((guint32)NewSize >= (guint32)0xffffffff) {
527 MaxSizeLoadElementValue = 0xffffffff;
530 MaxSizeLoadElementValue = NewSize;
534 * \ingroup gdcmHeader
535 * \brief Loads the element if it's size is not to big.
536 * @param ElVal Element whose value shall be loaded.
537 * @param MaxSize Size treshold above which the element value is not
538 * loaded in memory. The element value is allways loaded
539 * when MaxSize is equal to UINT32_MAX.
542 void gdcmHeader::LoadElementValue(ElValue * ElVal) {
544 guint16 group = ElVal->GetGroup();
545 guint16 elem = ElVal->GetElement();
546 string vr = ElVal->GetVR();
547 guint32 length = ElVal->GetLength();
548 bool SkipLoad = false;
550 fseek(fp, (long)ElVal->GetOffset(), SEEK_SET);
552 // Sequences not treated yet !
556 // Heuristic : a sequence "contains" a set of tags (called items). It looks
557 // like the last tag of a sequence (the one that terminates the sequence)
558 // has a group of 0xfffe (with a dummy length).
559 if( group == 0xfffe )
562 // The group length doesn't represent data to be loaded in memory, since
563 // each element of the group shall be loaded individualy.
568 // FIXME the following skip is not necessary
569 SkipElementValue(ElVal);
571 ElVal->SetValue("gdcm::Skipped");
575 // When the length is zero things are easy:
581 // Values bigger than specified are not loaded.
582 if (length > MaxSizeLoadElementValue) {
584 s << "gdcm::NotLoaded.";
585 s << " Address:" << (long)ElVal->GetOffset();
586 s << " Length:" << ElVal->GetLength();
587 //mesg += " Length:" + ElVal->GetLength();
588 ElVal->SetValue(s.str());
592 // When an integer is expected, read and convert the following two or
593 // four bytes properly i.e. as an integer as opposed to a string.
594 if ( IsAnInteger(ElVal) ) {
597 NewInt = ReadInt16();
598 } else if( length == 4 ) {
599 NewInt = ReadInt32();
601 dbg.Error(true, "LoadElementValue: Inconsistency when reading Int.");
603 //FIXME: make the following an util fonction
606 ElVal->SetValue(s.str());
610 // FIXME The exact size should be length if we move to strings or whatever
611 char* NewValue = (char*)malloc(length+1);
613 dbg.Verbose(1, "LoadElementValue: Failed to allocate NewValue");
618 item_read = fread(NewValue, (size_t)length, (size_t)1, fp);
619 if ( item_read != 1 ) {
621 Error::FileReadError(fp, "gdcmHeader::LoadElementValue");
622 ElVal->SetValue("gdcm::UnRead");
625 ElVal->SetValue(NewValue);
629 * \ingroup gdcmHeader
630 * \brief Loads the element while preserving the current
631 * underlying file position indicator as opposed to
632 * to LoadElementValue that modifies it.
633 * @param ElVal Element whose value shall be loaded.
636 void gdcmHeader::LoadElementValueSafe(ElValue * ElVal) {
637 long PositionOnEntry = ftell(fp);
638 LoadElementValue(ElVal);
639 fseek(fp, PositionOnEntry, SEEK_SET);
643 guint16 gdcmHeader::ReadInt16(void) {
646 item_read = fread (&g, (size_t)2,(size_t)1, fp);
647 if ( item_read != 1 )
648 throw Error::FileReadError(fp, "gdcmHeader::ReadInt16");
653 guint32 gdcmHeader::ReadInt32(void) {
656 item_read = fread (&g, (size_t)4,(size_t)1, fp);
657 if ( item_read != 1 )
658 throw Error::FileReadError(fp, "gdcmHeader::ReadInt32");
664 * \ingroup gdcmHeader
665 * \brief Read the next tag without loading it's value
666 * @return On succes the newly created ElValue, NULL on failure.
669 ElValue * gdcmHeader::ReadNextElement(void) {
678 catch ( Error::FileReadError ) {
679 // We reached the EOF (or an error occured) and header parsing
680 // has to be considered as finished.
684 // Find out if the tag we encountered is in the dictionaries:
685 gdcmDictEntry * NewTag = IsInDicts(g, n);
687 NewTag = new gdcmDictEntry(g, n);
689 NewElVal = new ElValue(NewTag);
691 dbg.Verbose(1, "ReadNextElement: failed to allocate ElValue");
696 try { FindLength(NewElVal); }
697 catch ( Error::FileReadError ) { // Call it quits
700 NewElVal->SetOffset(ftell(fp));
704 bool gdcmHeader::IsAnInteger(ElValue * ElVal) {
705 guint16 group = ElVal->GetGroup();
706 guint16 element = ElVal->GetElement();
707 string vr = ElVal->GetVR();
708 guint32 length = ElVal->GetLength();
710 // When we have some semantics on the element we just read, and if we
711 // a priori know we are dealing with an integer, then we shall be
712 // able to swap it's element value properly.
713 if ( element == 0 ) { // This is the group length of the group
717 dbg.Error("gdcmHeader::IsAnInteger",
718 "Erroneous Group Length element length.");
721 if ( group % 2 != 0 )
722 // We only have some semantics on documented elements, which are
726 if ( (length != 4) && ( length != 2) )
727 // Swapping only make sense on integers which are 2 or 4 bytes long.
730 if ( (vr == "UL") || (vr == "US") || (vr == "SL") || (vr == "SS") )
733 if ( (group == 0x0028) && (element == 0x0005) )
734 // This tag is retained from ACR/NEMA
735 // CHECKME Why should "Image Dimensions" be a single integer ?
738 if ( (group == 0x0028) && (element == 0x0200) )
739 // This tag is retained from ACR/NEMA
746 * \ingroup gdcmHeader
747 * \brief Recover the offset (from the beginning of the file) of the pixels.
749 size_t gdcmHeader::GetPixelOffset(void) {
750 // If this file complies with the norm we should encounter the
751 // "Image Location" tag (0x0028, 0x0200). This tag contains the
752 // the group that contains the pixel data (hence the "Pixel Data"
753 // is found by indirection through the "Image Location").
754 // Inside the group pointed by "Image Location" the searched element
755 // is conventionally the element 0x0010 (when the norm is respected).
756 // When the "Image Location" is absent we default to group 0x7fe0.
759 string ImageLocation = GetPubElValByName("Image Location");
760 if ( ImageLocation == "UNFOUND" ) {
763 grPixel = (guint16) atoi( ImageLocation.c_str() );
765 if (grPixel != 0x7fe0)
766 // FIXME is this still necessary ?
767 // Now, this looks like an old dirty fix for Philips imager
771 ElValue* PixelElement = PubElVals.GetElementByNumber(grPixel, numPixel);
773 return PixelElement->GetOffset();
778 gdcmDictEntry * gdcmHeader::IsInDicts(guint32 group, guint32 element) {
779 gdcmDictEntry * found = (gdcmDictEntry*)0;
780 if (!RefPubDict && !RefShaDict) {
781 //FIXME build a default dictionary !
782 printf("FIXME in gdcmHeader::IsInDicts\n");
785 found = RefPubDict->GetTag(group, element);
790 found = RefShaDict->GetTag(group, element);
797 string gdcmHeader::GetPubElValByNumber(guint16 group, guint16 element) {
798 return PubElVals.GetElValueByNumber(group, element);
801 string gdcmHeader::GetPubElValRepByNumber(guint16 group, guint16 element) {
802 ElValue* elem = PubElVals.GetElementByNumber(group, element);
804 return "gdcm::Unfound";
805 return elem->GetVR();
808 string gdcmHeader::GetPubElValByName(string TagName) {
809 return PubElVals.GetElValueByName(TagName);
812 string gdcmHeader::GetPubElValRepByName(string TagName) {
813 ElValue* elem = PubElVals.GetElementByName(TagName);
815 return "gdcm::Unfound";
816 return elem->GetVR();
819 string gdcmHeader::GetShaElValByNumber(guint16 group, guint16 element) {
820 return ShaElVals.GetElValueByNumber(group, element);
823 string gdcmHeader::GetShaElValRepByNumber(guint16 group, guint16 element) {
824 ElValue* elem = ShaElVals.GetElementByNumber(group, element);
826 return "gdcm::Unfound";
827 return elem->GetVR();
830 string gdcmHeader::GetShaElValByName(string TagName) {
831 return ShaElVals.GetElValueByName(TagName);
834 string gdcmHeader::GetShaElValRepByName(string TagName) {
835 ElValue* elem = ShaElVals.GetElementByName(TagName);
837 return "gdcm::Unfound";
838 return elem->GetVR();
842 string gdcmHeader::GetElValByNumber(guint16 group, guint16 element) {
843 string pub = GetPubElValByNumber(group, element);
846 return GetShaElValByNumber(group, element);
849 string gdcmHeader::GetElValRepByNumber(guint16 group, guint16 element) {
850 string pub = GetPubElValRepByNumber(group, element);
853 return GetShaElValRepByNumber(group, element);
856 string gdcmHeader::GetElValByName(string TagName) {
857 string pub = GetPubElValByName(TagName);
860 return GetShaElValByName(TagName);
863 string gdcmHeader::GetElValRepByName(string TagName) {
864 string pub = GetPubElValRepByName(TagName);
867 return GetShaElValRepByName(TagName);
871 * \ingroup gdcmHeader
872 * \brief Parses the header of the file but does NOT load element values.
874 void gdcmHeader::ParseHeader(void) {
875 ElValue * newElValue = (ElValue *)0;
879 while ( (newElValue = ReadNextElement()) ) {
880 SkipElementValue(newElValue);
881 PubElVals.Add(newElValue);
886 * \ingroup gdcmHeader
887 * \brief Loads the element values of all the elements present in the
888 * public tag based hash table.
890 void gdcmHeader::LoadElements(void) {
892 TagElValueHT ht = PubElVals.GetTagHt();
893 for (TagElValueHT::iterator tag = ht.begin(); tag != ht.end(); ++tag)
894 LoadElementValue(tag->second);
897 void gdcmHeader::PrintPubElVal(ostream & os) {
901 void gdcmHeader::PrintPubDict(ostream & os) {
902 RefPubDict->Print(os);