// gdcmHeader.cxx
+//-----------------------------------------------------------------------------
+#include "gdcmHeader.h"
-#include "gdcm.h"
#include <stdio.h>
#include <cerrno>
// For nthos:
#else
#include <netinet/in.h>
#endif
-#include <cctype> // for isalpha
-#include <map>
-#include <sstream>
-#include "gdcmUtil.h"
-
-#define HEADER_LENGTH_TO_READ 256 // on ne lit plus que le debut
-#define _MaxSizeLoadElementValue_ 1024 // longueur au dela de laquelle on ne charge plus les valeurs
-
-//FIXME: this looks dirty to me...
+#include <cctype> // for isalpha
-#define str2num(str, typeNum) *((typeNum *)(str))
+#ifdef GDCM_NO_ANSI_STRING_STREAM
+# include <strstream>
+# define ostringstream ostrstream
+# else
+# include <sstream>
+#endif
-// str est un pointeur dans un tableau de caractères, qui doit contenir,
-// à cet endroit la, la représentation binaire d'un entier (16 ou 32 bits)
-// je veux récupérer ça ... dans un entier.
-// s'il y a une autre solution, évitant des cast et les indirections,
-// je suis preneur
+#include "gdcmUtil.h"
+#include "gdcmTS.h"
-VRHT * gdcmHeader::dicom_vr = (VRHT*)0;
-gdcmDictSet* gdcmHeader::Dicts = new gdcmDictSet();
+//-----------------------------------------------------------------------------
+// Refer to gdcmHeader::CheckSwap()
+const unsigned int gdcmHeader::HEADER_LENGTH_TO_READ = 256;
-void gdcmHeader::Initialise(void) {
- if (!gdcmHeader::dicom_vr)
- InitVRDict();
- RefPubDict = gdcmHeader::Dicts->GetDefaultPublicDict();
- RefShaDict = (gdcmDict*)0;
-}
+// Refer to gdcmHeader::SetMaxSizeLoadElementValue()
+const unsigned int gdcmHeader::MAX_SIZE_LOAD_ELEMENT_VALUE = 4096;
-gdcmHeader::gdcmHeader (const char* InFilename) {
- SetMaxSizeLoadElementValue(_MaxSizeLoadElementValue_);
- filename = InFilename;
- Initialise();
- fp=fopen(InFilename,"rw");
- dbg.Error(!fp, "gdcmHeader::gdcmHeader cannot open file", InFilename);
- ParseHeader();
+//-----------------------------------------------------------------------------
+// Constructor / Destructor
+/**
+ * \ingroup gdcmHeader
+ * \brief
+ * @param InFilename
+ * @param exception_on_error
+ * @param enable_sequences = true to allow the header
+ * to be parsed *inside* the SeQuences,
+ * when they have an actual length
+ */
+gdcmHeader::gdcmHeader(const char *InFilename,
+ bool exception_on_error,
+ bool enable_sequences ) {
+ if (enable_sequences)
+ enableSequences = 1;
+ else
+ enableSequences = 0;
+
+ SetMaxSizeLoadElementValue(MAX_SIZE_LOAD_ELEMENT_VALUE);
+ filename = InFilename;
+ Initialise();
+ if ( !OpenFile(exception_on_error))
+ return;
+ ParseHeader();
+ LoadElements();
+ CloseFile();
}
-gdcmHeader::~gdcmHeader (void) {
- fclose(fp);
- return;
-}
-
-void gdcmHeader::InitVRDict (void) {
- if (dicom_vr) {
- dbg.Verbose(0, "gdcmHeader::InitVRDict:", "VR dictionary allready set");
- return;
- }
- VRHT *vr = new VRHT;
- (*vr)["AE"] = "Application Entity"; // At most 16 bytes
- (*vr)["AS"] = "Age String"; // Exactly 4 bytes
- (*vr)["AT"] = "Attribute Tag"; // 2 16-bit unsigned short integers
- (*vr)["CS"] = "Code String"; // At most 16 bytes
- (*vr)["DA"] = "Date"; // Exactly 8 bytes
- (*vr)["DS"] = "Decimal String"; // At most 16 bytes
- (*vr)["DT"] = "Date Time"; // At most 26 bytes
- (*vr)["FL"] = "Floating Point Single"; // 32-bit IEEE 754:1985 float
- (*vr)["FD"] = "Floating Point Double"; // 64-bit IEEE 754:1985 double
- (*vr)["IS"] = "Integer String"; // At most 12 bytes
- (*vr)["LO"] = "Long String"; // At most 64 chars
- (*vr)["LT"] = "Long Text"; // At most 10240 chars
- (*vr)["OB"] = "Other Byte String"; // String of bytes (vr independant)
- (*vr)["OW"] = "Other Word String"; // String of 16-bit words (vr dep)
- (*vr)["PN"] = "Person Name"; // At most 64 chars
- (*vr)["SH"] = "Short String"; // At most 16 chars
- (*vr)["SL"] = "Signed Long"; // Exactly 4 bytes
- (*vr)["SQ"] = "Sequence of Items"; // Not Applicable
- (*vr)["SS"] = "Signed Short"; // Exactly 2 bytes
- (*vr)["ST"] = "Short Text"; // At most 1024 chars
- (*vr)["TM"] = "Time"; // At most 16 bytes
- (*vr)["UI"] = "Unique Identifier"; // At most 64 bytes
- (*vr)["UL"] = "Unsigned Long "; // Exactly 4 bytes
- (*vr)["UN"] = "Unknown"; // Any length of bytes
- (*vr)["US"] = "Unsigned Short "; // Exactly 2 bytes
- (*vr)["UT"] = "Unlimited Text"; // At most 2^32 -1 chars
- dicom_vr = vr;
+/**
+ * \ingroup gdcmHeader
+ * \brief
+ * @param exception_on_error
+ */
+gdcmHeader::gdcmHeader(bool exception_on_error) {
+ SetMaxSizeLoadElementValue(MAX_SIZE_LOAD_ELEMENT_VALUE);
+ Initialise();
}
/**
* \ingroup gdcmHeader
- * \brief Discover what the swap code is (among little endian, big endian,
- * bad little endian, bad big endian).
- *
+ * \brief Canonical destructor.
*/
-void gdcmHeader::CheckSwap()
-{
- // The only guaranted way of finding the swap code is to find a
- // group tag since we know it's length has to be of four bytes i.e.
- // 0x00000004. Finding the swap code in then straigthforward. Trouble
- // occurs when we can't find such group...
- guint32 s;
- guint32 x=4; // x : pour ntohs
- bool net2host; // true when HostByteOrder is the same as NetworkByteOrder
-
- int lgrLue;
- char * entCur;
- char deb[HEADER_LENGTH_TO_READ];
-
- // First, compare HostByteOrder and NetworkByteOrder in order to
- // determine if we shall need to swap bytes (i.e. the Endian type).
- if (x==ntohs(x))
- net2host = true;
- else
- net2host = false;
-
- // The easiest case is the one of a DICOM header, since it possesses a
- // file preamble where it suffice to look for the string "DICM".
- lgrLue = fread(deb, 1, HEADER_LENGTH_TO_READ, fp);
-
- entCur = deb + 128;
- if(memcmp(entCur, "DICM", (size_t)4) == 0) {
- filetype = TrueDicom;
- dbg.Verbose(1, "gdcmHeader::CheckSwap:", "looks like DICOM Version3");
- } else {
- filetype = Unknown;
- dbg.Verbose(1, "gdcmHeader::CheckSwap:", "not a DICOM Version3 file");
- }
-
- if(filetype == TrueDicom) {
- // Next, determine the value representation (VR). Let's skip to the
- // first element (0002, 0000) and check there if we find "UL", in
- // which case we (almost) know it is explicit VR.
- // WARNING: if it happens to be implicit VR then what we will read
- // is the length of the group. If this ascii representation of this
- // length happens to be "UL" then we shall believe it is explicit VR.
- // FIXME: in order to fix the above warning, we could read the next
- // element value (or a couple of elements values) in order to make
- // sure we are not commiting a big mistake.
- // We need to skip :
- // * the 128 bytes of File Preamble (often padded with zeroes),
- // * the 4 bytes of "DICM" string,
- // * the 4 bytes of the first tag (0002, 0000),
- // i.e. a total of 136 bytes.
- entCur = deb + 136;
- if(memcmp(entCur, "UL", (size_t)2) == 0) {
- filetype = ExplicitVR;
- dbg.Verbose(1, "gdcmHeader::CheckSwap:",
- "explicit Value Representation");
- } else {
- filetype = ImplicitVR;
- dbg.Verbose(1, "gdcmHeader::CheckSwap:",
- "not an explicit Value Representation");
- }
-
- if (net2host) {
- sw = 4321;
- dbg.Verbose(1, "gdcmHeader::CheckSwap:",
- "HostByteOrder != NetworkByteOrder");
- } else {
- sw = 0;
- dbg.Verbose(1, "gdcmHeader::CheckSwap:",
- "HostByteOrder = NetworkByteOrder");
- }
-
- // Position the file position indicator at first tag (i.e.
- // after the file preamble and the "DICM" string).
- rewind(fp);
- fseek (fp, 132L, SEEK_SET);
- return;
- } // End of TrueDicom
-
- // Alas, this is not a DicomV3 file and whatever happens there is no file
- // preamble. We can reset the file position indicator to where the data
- // is (i.e. the beginning of the file).
- rewind(fp);
-
- // Our next best chance would be to be considering a 'clean' ACR/NEMA file.
- // By clean we mean that the length of the first tag is written down.
- // If this is the case and since the length of the first group HAS to be
- // four (bytes), then determining the proper swap code is straightforward.
-
- entCur = deb + 4;
- s = str2num(entCur, guint32);
-
- switch (s) {
- case 0x00040000 :
- sw = 3412;
- filetype = ACR;
- return;
- case 0x04000000 :
- sw = 4321;
- filetype = ACR;
- return;
- case 0x00000400 :
- sw = 2143;
- filetype = ACR;
- return;
- case 0x00000004 :
- sw = 0;
- filetype = ACR;
- return;
- default :
- dbg.Verbose(0, "gdcmHeader::CheckSwap:",
- "ACR/NEMA unfound swap info (time to raise bets)");
- }
-
- // We are out of luck. It is not a DicomV3 nor a 'clean' ACR/NEMA file.
- // It is time for despaired wild guesses. So, let's assume this file
- // happens to be 'dirty' ACR/NEMA, i.e. the length of the group is
- // not present. Then the only info we have is the net2host one.
- if (! net2host )
- sw = 0;
- else
- sw = 4321;
- return;
+gdcmHeader::~gdcmHeader (void) {
+ dicom_vr = (gdcmVR*)0;
+ Dicts = (gdcmDictSet*)0;
+ RefPubDict = (gdcmDict*)0;
+ RefShaDict = (gdcmDict*)0;
+ return;
}
-void gdcmHeader::SwitchSwapToBigEndian(void) {
- dbg.Verbose(1, "gdcmHeader::SwitchSwapToBigEndian",
- "Switching to BigEndian mode.");
- if ( sw == 0 ) {
- sw = 4321;
- return;
- }
- if ( sw == 4321 ) {
- sw = 0;
- return;
- }
- if ( sw == 3412 ) {
- sw = 2143;
- return;
- }
- if ( sw == 2143 )
- sw = 3412;
-}
+//-----------------------------------------------------------------------------
+// Print
-void gdcmHeader::GetPixels(size_t lgrTotale, void* _Pixels) {
- size_t pixelsOffset;
- pixelsOffset = GetPixelOffset();
- fseek(fp, pixelsOffset, SEEK_SET);
- fread(_Pixels, 1, lgrTotale, fp);
+/**
+ * \ingroup gdcmHeader
+ * \brief
+ * @return
+ */
+void gdcmHeader::PrintPubElVal(std::ostream & os) {
+ PubElValSet.Print(os);
}
+/**
+ * \ingroup gdcmHeader
+ * \brief
+ * @return
+ */
+void gdcmHeader::PrintPubDict(std::ostream & os) {
+ RefPubDict->Print(os);
+}
-
+//-----------------------------------------------------------------------------
+// Public
/**
- * \ingroup gdcmHeader
- * \brief Find the value representation of the current tag.
- *
- * @param sw code swap
- * @param skippedLength pointeur sur nombre d'octets que l'on a saute qd
- * la lecture est finie
- * @param longueurLue pointeur sur longueur (en nombre d'octets)
- * effectivement lue
- * @return longueur retenue pour le champ
+ * \ingroup gdcmHeader
+ * \brief This predicate, based on hopefully reasonable heuristics,
+ * decides whether or not the current gdcmHeader was properly parsed
+ * and contains the mandatory information for being considered as
+ * a well formed and usable image.
+ * @return true when gdcmHeader is the one of a reasonable Dicom file,
+ * false otherwise.
*/
-
-// -->
-// --> Oops
-// --> C'etait la description de quoi, ca?
-// -->
-
-void gdcmHeader::FindVR( ElValue *ElVal) {
- if (filetype != ExplicitVR)
- return;
-
- char VR[3];
- string vr;
- int lgrLue;
- long PositionOnEntry = ftell(fp);
- // Warning: we believe this is explicit VR (Value Representation) because
- // we used a heuristic that found "UL" in the first tag. Alas this
- // doesn't guarantee that all the tags will be in explicit VR. In some
- // cases (see e-film filtered files) one finds implicit VR tags mixed
- // within an explicit VR file. Hence we make sure the present tag
- // is in explicit VR and try to fix things if it happens not to be
- // the case.
- bool RealExplicit = true;
-
- lgrLue=fread (&VR, (size_t)2,(size_t)1, fp);
- VR[2]=0;
- vr = string(VR);
-
- // Assume we are reading a falsely explicit VR file i.e. we reached
- // a tag where we expect reading a VR but are in fact we read the
- // first to bytes of the length. Then we will interogate (through find)
- // the dicom_vr dictionary with oddities like "\004\0" which crashes
- // both GCC and VC++ implementations of the STL map. Hence when the
- // expected VR read happens to be non-ascii characters we consider
- // we hit falsely explicit VR tag.
-
- if ( (!isalpha(VR[0])) && (!isalpha(VR[1])) )
- RealExplicit = false;
-
- // CLEANME searching the dicom_vr at each occurence is expensive.
- // PostPone this test in an optional integrity check at the end
- // of parsing or only in debug mode.
- if ( RealExplicit && !dicom_vr->count(vr) )
- RealExplicit = false;
-
- if ( RealExplicit ) {
- if ( ElVal->IsVrUnknown() ) {
- // When not a dictionary entry, we can safely overwrite the vr.
- ElVal->SetVR(vr);
- return;
- }
- if ( ElVal->GetVR() == vr ) {
- // The vr we just read and the dictionary agree. Nothing to do.
- return;
- }
- // The vr present in the file and the dictionary disagree. We assume
- // the file writer knew best and use the vr of the file. Since it would
- // be unwise to overwrite the vr of a dictionary (since it would
- // compromise it's next user), we need to clone the actual DictEntry
- // and change the vr for the read one.
- gdcmDictEntry* NewTag = new gdcmDictEntry(ElVal->GetGroup(),
- ElVal->GetElement(),
- vr,
- "FIXME",
- ElVal->GetName());
- ElVal->SetDictEntry(NewTag);
- return;
- }
-
- // We thought this was explicit VR, but we end up with an
- // implicit VR tag. Let's backtrack.
- dbg.Verbose(1, "gdcmHeader::FindVR:", "Falsely explicit vr file");
- fseek(fp, PositionOnEntry, SEEK_SET);
- // When this element is known in the dictionary we shall use, e.g. for
- // the semantics (see the usage of IsAnInteger), the vr proposed by the
- // dictionary entry. Still we have to flag the element as implicit since
- // we know now our assumption on expliciteness is not furfilled.
- // avoid .
- if ( ElVal->IsVrUnknown() )
- ElVal->SetVR("Implicit");
- ElVal->SetImplicitVr();
+bool gdcmHeader::IsReadable(void) {
+ std::string res = GetPubElValByNumber(0x0028, 0x0005);
+ if ( res != GDCM_UNFOUND
+ && atoi(res.c_str()) > 4 ) {
+ return false; // Image Dimensions
+ }
+ if ( GetPubElValByNumber(0x0028, 0x0100) == GDCM_UNFOUND )
+ return false; // "Bits Allocated"
+ if ( GetPubElValByNumber(0x0028, 0x0101) == GDCM_UNFOUND )
+ return false; // "Bits Stored"
+ if ( GetPubElValByNumber(0x0028, 0x0102) == GDCM_UNFOUND )
+ return false; // "High Bit"
+ if ( GetPubElValByNumber(0x0028, 0x0103) == GDCM_UNFOUND )
+ return false; // "Pixel Representation"
+ return true;
}
/**
* \ingroup gdcmHeader
- * \brief Determines if the Transfer Syntax was allready encountered
+ * \brief Determines if the Transfer Syntax was already encountered
* and if it corresponds to a ImplicitVRLittleEndian one.
*
* @return True when ImplicitVRLittleEndian found. False in all other cases.
*/
bool gdcmHeader::IsImplicitVRLittleEndianTransferSyntax(void) {
- ElValue* Element = PubElVals.GetElementByNumber(0x0002, 0x0010);
- if ( !Element )
- return false;
- LoadElementValueSafe(Element);
- string Transfer = Element->GetValue();
- if ( Transfer == "1.2.840.10008.1.2" )
- return true;
- return false;
+ gdcmElValue* Element = PubElValSet.GetElementByNumber(0x0002, 0x0010);
+ if ( !Element )
+ return false;
+ LoadElementValueSafe(Element);
+ std::string Transfer = Element->GetValue();
+ if ( Transfer == "1.2.840.10008.1.2" )
+ return true;
+ return false;
}
/**
* \ingroup gdcmHeader
- * \brief Determines if the Transfer Syntax was allready encountered
+ * \brief Determines if the Transfer Syntax was already encountered
* and if it corresponds to a ExplicitVRLittleEndian one.
*
* @return True when ExplicitVRLittleEndian found. False in all other cases.
*/
bool gdcmHeader::IsExplicitVRLittleEndianTransferSyntax(void) {
- ElValue* Element = PubElVals.GetElementByNumber(0x0002, 0x0010);
- if ( !Element )
- return false;
- LoadElementValueSafe(Element);
- string Transfer = Element->GetValue();
- if ( Transfer == "1.2.840.10008.1.2.1" )
- return true;
- return false;
+ gdcmElValue* Element = PubElValSet.GetElementByNumber(0x0002, 0x0010);
+ if ( !Element )
+ return false;
+ LoadElementValueSafe(Element);
+ std::string Transfer = Element->GetValue();
+ if ( Transfer == "1.2.840.10008.1.2.1" )
+ return true;
+ return false;
}
/**
* \ingroup gdcmHeader
- * \brief Determines if the Transfer Syntax was allready encountered
+ * \brief Determines if the Transfer Syntax was already encountered
* and if it corresponds to a DeflatedExplicitVRLittleEndian one.
*
* @return True when DeflatedExplicitVRLittleEndian found. False in all other cases.
*/
bool gdcmHeader::IsDeflatedExplicitVRLittleEndianTransferSyntax(void) {
- ElValue* Element = PubElVals.GetElementByNumber(0x0002, 0x0010);
- if ( !Element )
- return false;
- LoadElementValueSafe(Element);
- string Transfer = Element->GetValue();
- if ( Transfer == "1.2.840.10008.1.2.1.99" )
- return true;
- return false;
+ gdcmElValue* Element = PubElValSet.GetElementByNumber(0x0002, 0x0010);
+ if ( !Element )
+ return false;
+ LoadElementValueSafe(Element);
+ std::string Transfer = Element->GetValue();
+ if ( Transfer == "1.2.840.10008.1.2.1.99" )
+ return true;
+ return false;
}
-
/**
* \ingroup gdcmHeader
- * \brief Determines if the Transfer Syntax was allready encountered
+ * \brief Determines if the Transfer Syntax was already encountered
* and if it corresponds to a Explicit VR Big Endian one.
*
* @return True when big endian found. False in all other cases.
*/
bool gdcmHeader::IsExplicitVRBigEndianTransferSyntax(void) {
- ElValue* Element = PubElVals.GetElementByNumber(0x0002, 0x0010);
- if ( !Element )
- return false;
- LoadElementValueSafe(Element);
- string Transfer = Element->GetValue();
- if ( Transfer == "1.2.840.10008.1.2.2" )
- return true;
- return false;
+ gdcmElValue* Element = PubElValSet.GetElementByNumber(0x0002, 0x0010);
+ if ( !Element )
+ return false;
+ LoadElementValueSafe(Element);
+ std::string Transfer = Element->GetValue();
+ if ( Transfer == "1.2.840.10008.1.2.2" ) //1.2.2 ??? A verifier !
+ return true;
+ return false;
}
-
/**
* \ingroup gdcmHeader
- * \brief Determines if the Transfer Syntax was allready encountered
+ * \brief Determines if the Transfer Syntax was already encountered
* and if it corresponds to a JPEGBaseLineProcess1 one.
*
* @return True when JPEGBaseLineProcess1found. False in all other cases.
*/
bool gdcmHeader::IsJPEGBaseLineProcess1TransferSyntax(void) {
- ElValue* Element = PubElVals.GetElementByNumber(0x0002, 0x0010);
- if ( !Element )
- return false;
- LoadElementValueSafe(Element);
- string Transfer = Element->GetValue();
- if ( Transfer == "1.2.840.10008.1.2.4.50" )
- return true;
- return false;
+ gdcmElValue* Element = PubElValSet.GetElementByNumber(0x0002, 0x0010);
+ if ( !Element )
+ return false;
+ LoadElementValueSafe(Element);
+ std::string Transfer = Element->GetValue();
+ if ( Transfer == "1.2.840.10008.1.2.4.50" )
+ return true;
+ return false;
}
/**
* \ingroup gdcmHeader
- * \brief Determines if the Transfer Syntax was allready encountered
+ * \brief Determines if the Transfer Syntax was already encountered
* and if it corresponds to a JPEGExtendedProcess2-4 one.
*
* @return True when JPEGExtendedProcess2-4 found. False in all other cases.
*/
bool gdcmHeader::IsJPEGExtendedProcess2_4TransferSyntax(void) {
- ElValue* Element = PubElVals.GetElementByNumber(0x0002, 0x0010);
- if ( !Element )
- return false;
- LoadElementValueSafe(Element);
- string Transfer = Element->GetValue();
- if ( Transfer == "1.2.840.10008.1.2.4.51" )
- return true;
- return false;
+ gdcmElValue* Element = PubElValSet.GetElementByNumber(0x0002, 0x0010);
+ if ( !Element )
+ return false;
+ LoadElementValueSafe(Element);
+ std::string Transfer = Element->GetValue();
+ if ( Transfer == "1.2.840.10008.1.2.4.51" )
+ return true;
+ return false;
}
-
/**
* \ingroup gdcmHeader
- * \brief Determines if the Transfer Syntax was allready encountered
+ * \brief Determines if the Transfer Syntax was already encountered
* and if it corresponds to a JPEGExtendeProcess3-5 one.
*
* @return True when JPEGExtendedProcess3-5 found. False in all other cases.
*/
bool gdcmHeader::IsJPEGExtendedProcess3_5TransferSyntax(void) {
- ElValue* Element = PubElVals.GetElementByNumber(0x0002, 0x0010);
- if ( !Element )
- return false;
- LoadElementValueSafe(Element);
- string Transfer = Element->GetValue();
- if ( Transfer == "1.2.840.10008.1.2.4.52" )
- return true;
- return false;
+ gdcmElValue* Element = PubElValSet.GetElementByNumber(0x0002, 0x0010);
+ if ( !Element )
+ return false;
+ LoadElementValueSafe(Element);
+ std::string Transfer = Element->GetValue();
+ if ( Transfer == "1.2.840.10008.1.2.4.52" )
+ return true;
+ return false;
}
/**
* \ingroup gdcmHeader
- * \brief Determines if the Transfer Syntax was allready encountered
+ * \brief Determines if the Transfer Syntax was already encountered
* and if it corresponds to a JPEGSpectralSelectionProcess6-8 one.
*
- * @return True when JPEGSpectralSelectionProcess6-8 found. False in all other cases.
+ * @return True when JPEGSpectralSelectionProcess6-8 found. False in all
+ * other cases.
*/
bool gdcmHeader::IsJPEGSpectralSelectionProcess6_8TransferSyntax(void) {
- ElValue* Element = PubElVals.GetElementByNumber(0x0002, 0x0010);
- if ( !Element )
- return false;
- LoadElementValueSafe(Element);
- string Transfer = Element->GetValue();
- if ( Transfer == "1.2.840.10008.1.2.4.53" )
- return true;
- return false;
-}
-
-//
-// Euhhhhhhh
-// Il y en a encore DIX-SEPT, comme ça.
-// Il faudrait trouver qq chose + rusé ...
-//
-// --> probablement TOUS les supprimer (Eric dixit)
-//
-
-
-void gdcmHeader::FixFoundLength(ElValue * ElVal, guint32 FoundLength) {
- // Heuristic: a final fix.
- if ( FoundLength == 0xffffffff)
- FoundLength = 0;
- ElVal->SetLength(FoundLength);
-}
-
-guint32 gdcmHeader::FindLengthOB(void) {
- // See PS 3.5-2001, section A.4 p. 49 on encapsulation of encoded pixel data.
- guint16 g;
- guint16 n;
- long PositionOnEntry = ftell(fp);
- bool FoundSequenceDelimiter = false;
- guint32 TotalLength = 0;
- guint32 ItemLength;
-
- while ( ! FoundSequenceDelimiter) {
- g = ReadInt16();
- n = ReadInt16();
- if (errno == 1)
- return 0;
- TotalLength += 4; // We even have to decount the group and element
- if ( g != 0xfffe ) {
- dbg.Verbose(1, "gdcmHeader::FindLengthOB: ",
- "wrong group for an item sequence.");
- errno = 1;
- return 0;
- }
- if ( n == 0xe0dd )
- FoundSequenceDelimiter = true;
- else if ( n != 0xe000) {
- dbg.Verbose(1, "gdcmHeader::FindLengthOB: ",
- "wrong element for an item sequence.");
- errno = 1;
- return 0;
- }
- ItemLength = ReadInt32();
- TotalLength += ItemLength + 4; // We add 4 bytes since we just read
- // the ItemLength with ReadInt32
- SkipBytes(ItemLength);
- }
- fseek(fp, PositionOnEntry, SEEK_SET);
- return TotalLength;
-}
-
-void gdcmHeader::FindLength(ElValue * ElVal) {
- guint16 element = ElVal->GetElement();
- string vr = ElVal->GetVR();
- guint16 length16;
-
- if ( (filetype == ExplicitVR) && ! ElVal->IsImplicitVr() ) {
-
- if ( (vr=="OB") || (vr=="OW") || (vr=="SQ") || (vr=="UN") ) {
- // The following reserved two bytes (see PS 3.5-2001, section
- // 7.1.2 Data element structure with explicit vr p27) must be
- // skipped before proceeding on reading the length on 4 bytes.
- fseek(fp, 2L, SEEK_CUR);
- guint32 length32 = ReadInt32();
- if ( (vr == "OB") && (length32 == 0xffffffff) ) {
- ElVal->SetLength(FindLengthOB());
- return;
- }
- FixFoundLength(ElVal, length32);
- return;
- }
-
- // Length is encoded on 2 bytes.
- length16 = ReadInt16();
-
- // We can tell the current file is encoded in big endian (like
- // Data/US-RGB-8-epicard) when we find the "Transfer Syntax" tag
- // and it's value is the one of the encoding of a big endian file.
- // In order to deal with such big endian encoded files, we have
- // (at least) two strategies:
- // * when we load the "Transfer Syntax" tag with value of big endian
- // encoding, we raise the proper flags. Then we wait for the end
- // of the META group (0x0002) among which is "Transfer Syntax",
- // before switching the swap code to big endian. We have to postpone
- // the switching of the swap code since the META group is fully encoded
- // in little endian, and big endian coding only starts at the next
- // group. The corresponding code can be hard to analyse and adds
- // many additional unnecessary tests for regular tags.
- // * the second strategy consists in waiting for trouble, that shall appear
- // when we find the first group with big endian encoding. This is
- // easy to detect since the length of a "Group Length" tag (the
- // ones with zero as element number) has to be of 4 (0x0004). When we
- // encouter 1024 (0x0400) chances are the encoding changed and we
- // found a group with big endian encoding.
- // We shall use this second strategy. In order make sure that we
- // can interpret the presence of an apparently big endian encoded
- // length of a "Group Length" without committing a big mistake, we
- // add an additional check: we look in the allready parsed elements
- // for the presence of a "Transfer Syntax" whose value has to be "big
- // endian encoding". When this is the case, chances are we got our
- // hands on a big endian encoded file: we switch the swap code to
- // big endian and proceed...
- if ( (element == 0x000) && (length16 == 0x0400) ) {
- if ( ! IsExplicitVRBigEndianTransferSyntax() ) {
- dbg.Verbose(0, "gdcmHeader::FindLength", "not explicit VR");
- errno = 1;
- return;
- }
- length16 = 4;
- SwitchSwapToBigEndian();
- // Restore the unproperly loaded values i.e. the group, the element
- // and the dictionary entry depending on them.
- guint16 CorrectGroup = SwapShort(ElVal->GetGroup());
- guint16 CorrectElem = SwapShort(ElVal->GetElement());
- gdcmDictEntry * NewTag = IsInDicts(CorrectGroup, CorrectElem);
- if (!NewTag) {
- // This correct tag is not in the dictionary. Create a new one.
- NewTag = new gdcmDictEntry(CorrectGroup, CorrectElem);
- }
- // FIXME this can create a memory leaks on the old entry that be
- // left unreferenced.
- ElVal->SetDictEntry(NewTag);
- }
-
- // Heuristic: well some files are really ill-formed.
- if ( length16 == 0xffff) {
- length16 = 0;
- dbg.Verbose(0, "gdcmHeader::FindLength",
- "Erroneous element length fixed.");
- }
- FixFoundLength(ElVal, (guint32)length16);
- return;
- }
-
- // Either implicit VR or a non DICOM conformal (see not below) explicit
- // VR that ommited the VR of (at least) this element. Farts happen.
- // [Note: according to the part 5, PS 3.5-2001, section 7.1 p25
- // on Data elements "Implicit and Explicit VR Data Elements shall
- // not coexist in a Data Set and Data Sets nested within it".]
- // Length is on 4 bytes.
- FixFoundLength(ElVal, ReadInt32());
+ gdcmElValue* Element = PubElValSet.GetElementByNumber(0x0002, 0x0010);
+ if ( !Element )
+ return false;
+ LoadElementValueSafe(Element);
+ std::string Transfer = Element->GetValue();
+ if ( Transfer == "1.2.840.10008.1.2.4.53" )
+ return true;
+ return false;
}
/**
* \ingroup gdcmHeader
- * \brief Swaps back the bytes of 4-byte long integer accordingly to
- * processor order.
+ * \brief Determines if the Transfer Syntax was already encountered
+ * and if it corresponds to a RLE Lossless one.
*
- * @return The suggested integer.
+ * @return True when RLE Lossless found. False in all
+ * other cases.
*/
-guint32 gdcmHeader::SwapLong(guint32 a) {
- // FIXME: il pourrait y avoir un pb pour les entiers negatifs ...
- switch (sw) {
- case 0 :
- break;
- case 4321 :
- a=( ((a<<24) & 0xff000000) | ((a<<8) & 0x00ff0000) |
- ((a>>8) & 0x0000ff00) | ((a>>24) & 0x000000ff) );
- break;
-
- case 3412 :
- a=( ((a<<16) & 0xffff0000) | ((a>>16) & 0x0000ffff) );
- break;
-
- case 2143 :
- a=( ((a<<8) & 0xff00ff00) | ((a>>8) & 0x00ff00ff) );
- break;
- default :
- dbg.Error(" gdcmHeader::SwapLong : unset swap code");
- a=0;
- }
- return(a);
+bool gdcmHeader::IsRLELossLessTransferSyntax(void) {
+ gdcmElValue* Element = PubElValSet.GetElementByNumber(0x0002, 0x0010);
+ if ( !Element )
+ return false;
+ LoadElementValueSafe(Element);
+ std::string Transfer = Element->GetValue();
+ if ( Transfer == "1.2.840.10008.1.2.5" )
+ return true;
+ return false;
}
/**
* \ingroup gdcmHeader
- * \brief Swaps the bytes so they agree with the processor order
- * @return The properly swaped 16 bits integer.
+ * \brief
+ *
+ * @return
*/
-guint16 gdcmHeader::SwapShort(guint16 a) {
- if ( (sw==4321) || (sw==2143) )
- a =(((a<<8) & 0x0ff00) | ((a>>8)&0x00ff));
- return (a);
+bool gdcmHeader::IsJPEGLossless(void) {
+ gdcmElValue* Element = PubElValSet.GetElementByNumber(0x0002, 0x0010);
+ // faire qq chose d'intelligent a la place de ça
+ if ( !Element )
+ return false;
+ LoadElementValueSafe(Element);
+ const char * Transfert = Element->GetValue().c_str();
+ if ( memcmp(Transfert+strlen(Transfert)-2 ,"70",2)==0) return true;
+ if ( memcmp(Transfert+strlen(Transfert)-2 ,"55",2)==0) return true;
+ if (Element->GetValue() == "1.2.840.10008.1.2.4.57") return true;
+
+ return false;
}
-void gdcmHeader::SkipBytes(guint32 NBytes) {
- //FIXME don't dump the returned value
- (void)fseek(fp, (long)NBytes, SEEK_CUR);
+/**
+ * \ingroup gdcmHeader
+ * \brief Determines if the Transfer Syntax was already encountered
+ * and if it corresponds to a JPEG200 one.0
+ *
+ * @return True when JPEG2000 (Lossly or LossLess) found. False in all
+ * other cases.
+ */
+bool gdcmHeader::IsJPEG2000(void) {
+ gdcmElValue* Element = PubElValSet.GetElementByNumber(0x0002, 0x0010);
+ if ( !Element )
+ return false;
+ LoadElementValueSafe(Element);
+ std::string Transfer = Element->GetValue();
+ if ( (Transfer == "1.2.840.10008.1.2.4.90")
+ || (Transfer == "1.2.840.10008.1.2.4.91") )
+ return true;
+ return false;
}
-void gdcmHeader::SkipElementValue(ElValue * ElVal) {
- SkipBytes(ElVal->GetLength());
+/**
+ * \ingroup gdcmHeader
+ * \brief Predicate for dicom version 3 file.
+ * @return True when the file is a dicom version 3.
+ */
+bool gdcmHeader::IsDicomV3(void) {
+ if ( (filetype == ExplicitVR)
+ || (filetype == ImplicitVR) )
+ return true;
+ return false;
}
-void gdcmHeader::SetMaxSizeLoadElementValue(long NewSize) {
- if (NewSize < 0)
- return;
- if ((guint32)NewSize >= (guint32)0xffffffff) {
- MaxSizeLoadElementValue = 0xffffffff;
- return;
- }
- MaxSizeLoadElementValue = NewSize;
+/**
+ * \ingroup gdcmHeader
+ * \brief
+ * @return
+ */
+FileType gdcmHeader::GetFileType(void)
+{
+ return(filetype);
}
/**
- * \ingroup gdcmHeader
- * \brief Loads the element if it's size is not to big.
- * @param ElVal Element whose value shall be loaded.
- * @param MaxSize Size treshold above which the element value is not
- * loaded in memory. The element value is allways loaded
- * when MaxSize is equal to UINT32_MAX.
- * @return
+ * \ingroup gdcmHeader
+ * \brief Retrieve the number of columns of image.
+ * @return The encountered size when found, 0 by default.
*/
-void gdcmHeader::LoadElementValue(ElValue * ElVal) {
- size_t item_read;
- guint16 group = ElVal->GetGroup();
- guint16 elem = ElVal->GetElement();
- string vr = ElVal->GetVR();
- guint32 length = ElVal->GetLength();
- bool SkipLoad = false;
+int gdcmHeader::GetXSize(void) {
+ // We cannot check for "Columns" because the "Columns" tag is present
+ // both in IMG (0028,0011) and OLY (6000,0011) sections of the dictionary.
+ std::string StrSize = GetPubElValByNumber(0x0028,0x0011);
+ if (StrSize == GDCM_UNFOUND)
+ return 0;
+ return atoi(StrSize.c_str());
+}
- fseek(fp, (long)ElVal->GetOffset(), SEEK_SET);
-
- // Sequences not treated yet !
- //
- // Ne faudrait-il pas au contraire trouver immediatement
- // une maniere 'propre' de traiter les sequences (vr = SQ)
- // car commencer par les ignorer risque de conduire a qq chose
- // qui pourrait ne pas etre generalisable
- //
- if( vr == "SQ" )
- SkipLoad = true;
-
- // Heuristic : a sequence "contains" a set of tags (called items). It looks
- // like the last tag of a sequence (the one that terminates the sequence)
- // has a group of 0xfffe (with a dummy length).
- if( group == 0xfffe )
- SkipLoad = true;
-
- // The group length doesn't represent data to be loaded in memory, since
- // each element of the group shall be loaded individualy.
- if( elem == 0 )
- //SkipLoad = true; // modif sauvage JPR
- // On charge la longueur du groupe
- // quand l'element 0x0000 est présent !
-
- if ( SkipLoad ) {
- // FIXME the following skip is not necessary
- SkipElementValue(ElVal);
- ElVal->SetLength(0);
- ElVal->SetValue("gdcm::Skipped");
- return;
- }
-
- // When the length is zero things are easy:
- if ( length == 0 ) {
- ElVal->SetValue("");
- return;
- }
-
- // Values bigger than specified are not loaded.
- //
- // En fait, c'est les elements dont la longueur est superieure
- // a celle fixee qui ne sont pas charges
- //
- if (length > MaxSizeLoadElementValue) {
- ostringstream s;
- s << "gdcm::NotLoaded.";
- s << " Address:" << (long)ElVal->GetOffset();
- s << " Length:" << ElVal->GetLength();
- //mesg += " Length:" + ElVal->GetLength();
- ElVal->SetValue(s.str());
- return;
- }
-
- // When an integer is expected, read and convert the following two or
- // four bytes properly i.e. as an integer as opposed to a string.
- if ( IsAnInteger(ElVal) ) {
- guint32 NewInt;
- if( length == 2 ) {
- NewInt = ReadInt16();
- } else if( length == 4 ) {
- NewInt = ReadInt32();
- } else
- dbg.Error(true, "LoadElementValue: Inconsistency when reading Int.");
-
- //FIXME: make the following an util fonction
- ostringstream s;
- s << NewInt;
- ElVal->SetValue(s.str());
- return;
- }
-
- // FIXME The exact size should be length if we move to strings or whatever
- char* NewValue = (char*)malloc(length+1);
- if( !NewValue) {
- dbg.Verbose(1, "LoadElementValue: Failed to allocate NewValue");
- return;
- }
- NewValue[length]= 0;
-
- item_read = fread(NewValue, (size_t)length, (size_t)1, fp);
- if ( item_read != 1 ) {
- free(NewValue);
- dbg.Verbose(1, "gdcmHeader::LoadElementValue","unread element value");
- ElVal->SetValue("gdcm::UnRead");
- return;
- }
- ElVal->SetValue(NewValue);
+/**
+ * \ingroup gdcmHeader
+ * \brief Retrieve the number of lines of image.
+ * \warning The defaulted value is 1 as opposed to gdcmHeader::GetXSize()
+ * @return The encountered size when found, 1 by default.
+ */
+int gdcmHeader::GetYSize(void) {
+ // We cannot check for "Rows" because the "Rows" tag is present
+ // both in IMG (0028,0010) and OLY (6000,0010) sections of the dictionary.
+ std::string StrSize = GetPubElValByNumber(0x0028,0x0010);
+ if (StrSize != GDCM_UNFOUND)
+ return atoi(StrSize.c_str());
+ if ( IsDicomV3() )
+ return 0;
+ else
+ // The Rows (0028,0010) entry is optional for ACR/NEMA. It might
+ // hence be a signal (1d image). So we default to 1:
+ return 1;
}
/**
- * \ingroup gdcmHeader
- * \brief Loads the element while preserving the current
- * underlying file position indicator as opposed to
- * to LoadElementValue that modifies it.
- * @param ElVal Element whose value shall be loaded.
- * @return
+ * \ingroup gdcmHeader
+ * \brief Retrieve the number of planes of volume or the number
+ * of frames of a multiframe.
+ * \warning When present we consider the "Number of Frames" as the third
+ * dimension. When absent we consider the third dimension as
+ * being the "Planes" tag content.
+ * @return The encountered size when found, 1 by default.
*/
-void gdcmHeader::LoadElementValueSafe(ElValue * ElVal) {
- long PositionOnEntry = ftell(fp);
- LoadElementValue(ElVal);
- fseek(fp, PositionOnEntry, SEEK_SET);
+int gdcmHeader::GetZSize(void) {
+ // Both DicomV3 and ACR/Nema consider the "Number of Frames"
+ // as the third dimension.
+ std::string StrSize = GetPubElValByNumber(0x0028,0x0008);
+ if (StrSize != GDCM_UNFOUND)
+ return atoi(StrSize.c_str());
+
+ // We then consider the "Planes" entry as the third dimension [we
+ // cannot retrieve by name since "Planes tag is present both in
+ // IMG (0028,0012) and OLY (6000,0012) sections of the dictionary].
+ StrSize = GetPubElValByNumber(0x0028,0x0012);
+ if (StrSize != GDCM_UNFOUND)
+ return atoi(StrSize.c_str());
+ return 1;
}
+/**
+ * \ingroup gdcmHeader
+ * \brief Retrieve the number of Bits Stored
+ * (as opposite to number of Bits Allocated)
+ *
+ * @return The encountered number of Bits Stored, 0 by default.
+ */
+int gdcmHeader::GetBitsStored(void) {
+ std::string StrSize = GetPubElValByNumber(0x0028,0x0101);
+ if (StrSize == GDCM_UNFOUND)
+ return 1;
+ return atoi(StrSize.c_str());
+}
-guint16 gdcmHeader::ReadInt16(void) {
- guint16 g;
- size_t item_read;
- item_read = fread (&g, (size_t)2,(size_t)1, fp);
- errno = 0;
- if ( item_read != 1 ) {
- dbg.Verbose(1, "gdcmHeader::ReadInt16", " File read error");
- errno = 1;
- return 0;
- }
- g = SwapShort(g);
- return g;
+/**
+ * \ingroup gdcmHeader
+ * \brief Retrieve the number of Bits Allocated
+ * (8, 12 -compacted ACR-NEMA files, 16, ...)
+ *
+ * @return The encountered number of Bits Allocated, 0 by default.
+ */
+int gdcmHeader::GetBitsAllocated(void) {
+ std::string StrSize = GetPubElValByNumber(0x0028,0x0100);
+ if (StrSize == GDCM_UNFOUND)
+ return 1;
+ return atoi(StrSize.c_str());
}
-guint32 gdcmHeader::ReadInt32(void) {
- guint32 g;
- size_t item_read;
- item_read = fread (&g, (size_t)4,(size_t)1, fp);
- errno = 0;
- if ( item_read != 1 ) {
- dbg.Verbose(1, "gdcmHeader::ReadInt32", " File read error");
- errno = 1;
- return 0;
- }
- g = SwapLong(g);
- return g;
+/**
+ * \ingroup gdcmHeader
+ * \brief Retrieve the number of Samples Per Pixel
+ * (1 : gray level, 3 : RGB -1 or 3 Planes-)
+ *
+ * @return The encountered number of Samples Per Pixel, 1 by default.
+ */
+int gdcmHeader::GetSamplesPerPixel(void) {
+ std::string StrSize = GetPubElValByNumber(0x0028,0x0002);
+ if (StrSize == GDCM_UNFOUND)
+ return 1; // Well, it's supposed to be mandatory ...
+ return atoi(StrSize.c_str());
}
/**
* \ingroup gdcmHeader
- * \brief Read the next tag without loading it's value
- * @return On succes the newly created ElValue, NULL on failure.
+ * \brief Retrieve the Planar Configuration for RGB images
+ * (0 : RGB Pixels , 1 : R Plane + G Plane + B Plane)
+ *
+ * @return The encountered Planar Configuration, 0 by default.
*/
+int gdcmHeader::GetPlanarConfiguration(void) {
+ std::string StrSize = GetPubElValByNumber(0x0028,0x0006);
+ if (StrSize == GDCM_UNFOUND)
+ return 0;
+ return atoi(StrSize.c_str());
+}
-ElValue * gdcmHeader::ReadNextElement(void) {
- guint16 g;
- guint16 n;
- ElValue * NewElVal;
-
- g = ReadInt16();
- n = ReadInt16();
- if (errno == 1)
- // We reached the EOF (or an error occured) and header parsing
- // has to be considered as finished.
- return (ElValue *)0;
-
- // Find out if the tag we encountered is in the dictionaries:
- gdcmDictEntry * NewTag = IsInDicts(g, n);
- if (!NewTag)
- NewTag = new gdcmDictEntry(g, n);
-
- NewElVal = new ElValue(NewTag);
- if (!NewElVal) {
- dbg.Verbose(1, "ReadNextElement: failed to allocate ElValue");
- return (ElValue*)0;
- }
-
- FindVR(NewElVal);
- FindLength(NewElVal);
- if (errno == 1)
- // Call it quits
- return (ElValue *)0;
- NewElVal->SetOffset(ftell(fp));
- return NewElVal;
-}
-
-bool gdcmHeader::IsAnInteger(ElValue * ElVal) {
- guint16 group = ElVal->GetGroup();
- guint16 element = ElVal->GetElement();
- string vr = ElVal->GetVR();
- guint32 length = ElVal->GetLength();
-
- // When we have some semantics on the element we just read, and if we
- // a priori know we are dealing with an integer, then we shall be
- // able to swap it's element value properly.
- if ( element == 0 ) { // This is the group length of the group
- if (length == 4)
- return true;
- else
- dbg.Error("gdcmHeader::IsAnInteger",
- "Erroneous Group Length element length.");
- }
-
- if ( group % 2 != 0 )
- // We only have some semantics on documented elements, which are
- // the even ones.
- return false;
-
- if ( (length != 4) && ( length != 2) )
- // Swapping only make sense on integers which are 2 or 4 bytes long.
- return false;
-
- if ( (vr == "UL") || (vr == "US") || (vr == "SL") || (vr == "SS") )
- return true;
-
- if ( (group == 0x0028) && (element == 0x0005) )
- // This tag is retained from ACR/NEMA
- // CHECKME Why should "Image Dimensions" be a single integer ?
- //
- // "Image Dimensions", c'est en fait le 'nombre de dimensions'
- // de l'objet ACR-NEMA stocké
- // 1 : Signal
- // 2 : Image
- // 3 : Volume
- // 4 : Sequence
- //
- // DICOM V3 ne retient pas cette information
- // Par defaut, tout est 'Image',
- // C'est a l'utilisateur d'explorer l'ensemble des entetes
- // pour savoir à quoi il a a faire
- //
- // Le Dicom Multiframe peut etre utilise pour stocker,
- // dans un seul fichier, une serie temporelle (cardio vasculaire GE, p.ex)
- // ou un volume (medecine Nucleaire, p.ex)
- //
- return true;
-
- if ( (group == 0x0028) && (element == 0x0200) )
- // This tag is retained from ACR/NEMA
- return true;
-
- return false;
+/**
+ * \ingroup gdcmHeader
+ * \brief Return the size (in bytes) of a single pixel of data.
+ * @return The size in bytes of a single pixel of data.
+ *
+ */
+int gdcmHeader::GetPixelSize(void) {
+ std::string PixelType = GetPixelType();
+ if (PixelType == "8U" || PixelType == "8S")
+ return 1;
+ if (PixelType == "16U" || PixelType == "16S")
+ return 2;
+ if (PixelType == "32U" || PixelType == "32S")
+ return 4;
+ dbg.Verbose(0, "gdcmHeader::GetPixelSize: Unknown pixel type");
+ return 0;
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief Build the Pixel Type of the image.
+ * Possible values are:
+ * - 8U unsigned 8 bit,
+ * - 8S signed 8 bit,
+ * - 16U unsigned 16 bit,
+ * - 16S signed 16 bit,
+ * - 32U unsigned 32 bit,
+ * - 32S signed 32 bit,
+ * \warning 12 bit images appear as 16 bit.
+ * \ 24 bit images appear as 8 bit
+ * @return
+ */
+std::string gdcmHeader::GetPixelType(void) {
+ std::string BitsAlloc;
+ BitsAlloc = GetPubElValByNumber(0x0028, 0x0100); // Bits Allocated
+ if (BitsAlloc == GDCM_UNFOUND) {
+ dbg.Verbose(0, "gdcmHeader::GetPixelType: unfound Bits Allocated");
+ BitsAlloc = std::string("16");
+ }
+ if (BitsAlloc == "12") // It will be unpacked
+ BitsAlloc = std::string("16");
+ else if (BitsAlloc == "24") // (in order no to be messed up
+ BitsAlloc = std::string("8"); // by old RGB images)
+
+ std::string Signed;
+ Signed = GetPubElValByNumber(0x0028, 0x0103); // "Pixel Representation"
+ if (Signed == GDCM_UNFOUND) {
+ dbg.Verbose(0, "gdcmHeader::GetPixelType: unfound Pixel Representation");
+ BitsAlloc = std::string("0");
+ }
+ if (Signed == "0")
+ Signed = std::string("U");
+ else
+ Signed = std::string("S");
+
+ return( BitsAlloc + Signed);
}
/**
* \brief Recover the offset (from the beginning of the file) of the pixels.
*/
size_t gdcmHeader::GetPixelOffset(void) {
- // If this file complies with the norm we should encounter the
- // "Image Location" tag (0x0028, 0x0200). This tag contains the
- // the group that contains the pixel data (hence the "Pixel Data"
- // is found by indirection through the "Image Location").
- // Inside the group pointed by "Image Location" the searched element
- // is conventionally the element 0x0010 (when the norm is respected).
- // When the "Image Location" is absent we default to group 0x7fe0.
- guint16 grPixel;
- guint16 numPixel;
- string ImageLocation = GetPubElValByName("Image Location");
- if ( ImageLocation == "gdcm::Unfound" ) {
- grPixel = 0x7fe0;
- } else {
- grPixel = (guint16) atoi( ImageLocation.c_str() );
- }
- if (grPixel != 0x7fe0)
- // FIXME is this still necessary ?
- // Now, this looks like an old dirty fix for Philips imager
- numPixel = 0x1010;
- else
- numPixel = 0x0010;
- ElValue* PixelElement = PubElVals.GetElementByNumber(grPixel, numPixel);
- if (PixelElement)
- return PixelElement->GetOffset();
- else
- return 0;
-}
-
-gdcmDictEntry * gdcmHeader::IsInDicts(guint32 group, guint32 element) {
- //
- // Y a-t-il une raison de lui passer des guint32
- // alors que group et element sont des guint16?
- //
- gdcmDictEntry * found = (gdcmDictEntry*)0;
- if (!RefPubDict && !RefShaDict) {
- //FIXME build a default dictionary !
- printf("FIXME in gdcmHeader::IsInDicts\n");
- }
- if (RefPubDict) {
- found = RefPubDict->GetTag(group, element);
- if (found)
- return found;
- }
- if (RefShaDict) {
- found = RefShaDict->GetTag(group, element);
- if (found)
- return found;
- }
- return found;
+ // If this file complies with the norm we should encounter the
+ // "Image Location" tag (0x0028, 0x0200). This tag contains the
+ // the group that contains the pixel data (hence the "Pixel Data"
+ // is found by indirection through the "Image Location").
+ // Inside the group pointed by "Image Location" the searched element
+ // is conventionally the element 0x0010 (when the norm is respected).
+ // When the "Image Location" is absent we default to group 0x7fe0.
+ guint16 grPixel;
+ guint16 numPixel;
+ std::string ImageLocation = GetPubElValByNumber(0x0028, 0x0200);
+ if ( ImageLocation == GDCM_UNFOUND ) { // Image Location
+ grPixel = 0x7fe0;
+ } else {
+ grPixel = (guint16) atoi( ImageLocation.c_str() );
+ }
+ if (grPixel != 0x7fe0)
+ // This is a kludge for old dirty Philips imager.
+ numPixel = 0x1010;
+ else
+ numPixel = 0x0010;
+
+ gdcmElValue* PixelElement = PubElValSet.GetElementByNumber(grPixel,
+ numPixel);
+ if (PixelElement)
+ return PixelElement->GetOffset();
+ else
+ return 0;
}
-list<string> * gdcmHeader::GetPubTagNames(void) {
- list<string> * Result = new list<string>;
- TagHT entries = RefPubDict->GetEntries();
+/**
+ * \ingroup gdcmHeader
+ * \brief Recover the pixel area length (in Bytes) .
+ */
+size_t gdcmHeader::GetPixelAreaLength(void) {
+ // If this file complies with the norm we should encounter the
+ // "Image Location" tag (0x0028, 0x0200). This tag contains the
+ // the group that contains the pixel data (hence the "Pixel Data"
+ // is found by indirection through the "Image Location").
+ // Inside the group pointed by "Image Location" the searched element
+ // is conventionally the element 0x0010 (when the norm is respected).
+ // When the "Image Location" is absent we default to group 0x7fe0.
+ guint16 grPixel;
+ guint16 numPixel;
+ std::string ImageLocation = GetPubElValByNumber(0x0028, 0x0200);
+ if ( ImageLocation == GDCM_UNFOUND ) {
+ grPixel = 0x7fe0;
+ } else {
+ grPixel = (guint16) atoi( ImageLocation.c_str() );
+ }
+ if (grPixel != 0x7fe0)
+ // This is a kludge for old dirty Philips imager.
+ numPixel = 0x1010;
+ else
+ numPixel = 0x0010;
+
+ gdcmElValue* PixelElement = PubElValSet.GetElementByNumber(grPixel,
+ numPixel);
+ if (PixelElement)
+ return PixelElement->GetLength();
+ else
+ return 0;
+}
- for (TagHT::iterator tag = entries.begin(); tag != entries.end(); ++tag){
- Result->push_back( tag->second->GetName() );
- }
- return Result;
+/**
+ * \ingroup gdcmHeader
+ * \brief tells us if LUT are used
+ * \warning Right now, Segmented xxx Palette Color Lookup Table Data
+ * \ are NOT considered as LUT, since nobody knows
+ *\ how to deal with them
+ * @return int acts as a Boolean
+ */
+bool gdcmHeader::HasLUT(void) {
+
+ // Check the presence of the LUT Descriptors
+ if (GetPubElValByNumber(0x0028,0x1101) == GDCM_UNFOUND)
+ return false;
+ // LutDescriptorGreen
+ if (GetPubElValByNumber(0x0028,0x1102) == GDCM_UNFOUND)
+ return false;
+ // LutDescriptorBlue
+ if (GetPubElValByNumber(0x0028,0x1103) == GDCM_UNFOUND)
+ return false;
+ // It is not enough
+ // we check also
+ if (GetPubElValByNumber(0x0028,0x1201) == GDCM_UNFOUND)
+ return false;
+ if (GetPubElValByNumber(0x0028,0x1202) == GDCM_UNFOUND)
+ return false;
+ if (GetPubElValByNumber(0x0028,0x1203) == GDCM_UNFOUND)
+ return false;
+ return true;
}
-map<string, list<string> > * gdcmHeader::GetPubTagNamesByCategory(void) {
- map<string, list<string> > * Result = new map<string, list<string> >;
- TagHT entries = RefPubDict->GetEntries();
+/**
+ * \ingroup gdcmHeader
+ * \brief gets the info from 0028,1101 : Lookup Table Desc-Red
+ * \ else 0
+ * @return Lookup Table nBit
+ * \ when (0028,0004),Photometric Interpretation = [PALETTE COLOR ]
+ */
+int gdcmHeader::GetLUTNbits(void) {
+ std::vector<std::string> tokens;
+ //int LutLength;
+ //int LutDepth;
+ int LutNbits;
+ //Just hope Lookup Table Desc-Red = Lookup Table Desc-Red = Lookup Table Desc-Blue
+ // Consistency already checked in GetLUTLength
+ std::string LutDescription = GetPubElValByNumber(0x0028,0x1101);
+ if (LutDescription == GDCM_UNFOUND)
+ return 0;
+ tokens.erase(tokens.begin(),tokens.end()); // clean any previous value
+ Tokenize (LutDescription, tokens, "\\");
+ //LutLength=atoi(tokens[0].c_str());
+ //LutDepth=atoi(tokens[1].c_str());
+ LutNbits=atoi(tokens[2].c_str());
+ tokens.clear();
+ return LutNbits;
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief builts Red/Green/Blue/Alpha LUT from Header
+ * \ when (0028,0004),Photometric Interpretation = [PALETTE COLOR ]
+ * \ and (0028,1101),(0028,1102),(0028,1102)
+ * \ - xxx Palette Color Lookup Table Descriptor - are found
+ * \ and (0028,1201),(0028,1202),(0028,1202)
+ * \ - xxx Palette Color Lookup Table Data - are found
+ * \warning does NOT deal with :
+ * \ 0028 1100 Gray Lookup Table Descriptor (Retired)
+ * \ 0028 1221 Segmented Red Palette Color Lookup Table Data
+ * \ 0028 1222 Segmented Green Palette Color Lookup Table Data
+ * \ 0028 1223 Segmented Blue Palette Color Lookup Table Data
+ * \ no known Dicom reader deails with them :-(
+ * @return Lookup Table RGBA
+ */
+unsigned char * gdcmHeader::GetLUTRGBA(void) {
+// Not so easy : see
+// http://www.barre.nom.fr/medical/dicom2/limitations.html#Color%20Lookup%20Tables
+// and OT-PAL-8-face.dcm
+
+// if Photometric Interpretation # PALETTE COLOR, no LUT to be done
+ if (gdcmHeader::GetPubElValByNumber(0x0028,0x0004) != "PALETTE COLOR ") {
+ return NULL;
+ }
+
+ int lengthR, debR, nbitsR;
+ int lengthG, debG, nbitsG;
+ int lengthB, debB, nbitsB;
+
+// Get info from Lut Descriptors
+// (the 3 LUT descriptors may be different)
+ std::string LutDescriptionR = GetPubElValByNumber(0x0028,0x1101);
+ if (LutDescriptionR == GDCM_UNFOUND)
+ return NULL;
+ std::string LutDescriptionG = GetPubElValByNumber(0x0028,0x1102);
+ if (LutDescriptionG == GDCM_UNFOUND)
+ return NULL;
+ std::string LutDescriptionB = GetPubElValByNumber(0x0028,0x1103);
+ if (LutDescriptionB == GDCM_UNFOUND)
+ return NULL;
+
+ std::vector<std::string> tokens;
+
+ tokens.erase(tokens.begin(),tokens.end()); // clean any previous value
+ Tokenize (LutDescriptionR, tokens, "\\");
+ lengthR=atoi(tokens[0].c_str()); // Red LUT length in Bytes
+ debR =atoi(tokens[1].c_str()); // subscript of the first Lut Value
+ nbitsR =atoi(tokens[2].c_str()); // Lut item size (in Bits)
+ tokens.clear();
+
+ tokens.erase(tokens.begin(),tokens.end()); // clean any previous value
+ Tokenize (LutDescriptionG, tokens, "\\");
+ lengthG=atoi(tokens[0].c_str()); // Green LUT length in Bytes
+ debG =atoi(tokens[1].c_str());
+ nbitsG =atoi(tokens[2].c_str());
+ tokens.clear();
+
+ tokens.erase(tokens.begin(),tokens.end()); // clean any previous value
+ Tokenize (LutDescriptionB, tokens, "\\");
+ lengthB=atoi(tokens[0].c_str()); // Blue LUT length in Bytes
+ debB =atoi(tokens[1].c_str());
+ nbitsB =atoi(tokens[2].c_str());
+ tokens.clear();
+
+// Load LUTs into memory, (as they were stored on disk)
+ unsigned char *lutR = (unsigned char *)
+ GetPubElValVoidAreaByNumber(0x0028,0x1201);
+ unsigned char *lutG = (unsigned char *)
+ GetPubElValVoidAreaByNumber(0x0028,0x1202);
+ unsigned char *lutB = (unsigned char *)
+ GetPubElValVoidAreaByNumber(0x0028,0x1203);
+
+ if (!lutR || !lutG || !lutB ) {
+ return NULL;
+ }
+ // forge the 4 * 8 Bits Red/Green/Blue/Alpha LUT
+
+ unsigned char *LUTRGBA = (unsigned char *)calloc(1024,1); // 256 * 4 (R, G, B, Alpha)
+ if (!LUTRGBA) {
+ return NULL;
+ }
+ memset(LUTRGBA, 0, 1024);
+ // Bits Allocated
+ int nb;
+ std::string str_nb = GetPubElValByNumber(0x0028,0x0100);
+ if (str_nb == GDCM_UNFOUND ) {
+ nb = 16;
+ } else {
+ nb = atoi(str_nb.c_str() );
+ }
+ int mult;
+
+ if (nbitsR==16 && nb==8) // when LUT item size is different than pixel size
+ mult=2; // high byte must be = low byte
+ else // See PS 3.3-2003 C.11.1.1.2 p 619
+ mult=1;
+
+ // if we get a black image, let's just remove the '+1'
+ // from 'i*mult+1' and check again
+ // if it works, we shall have to check the 3 Palettes
+ // to see which byte is ==0 (first one, or second one)
+ // and fix the code
+ // We give up the checking to avoid some overhead
+ unsigned char *a;
+ int i;
+
+ a = LUTRGBA+0;
+ for(i=0;i<lengthR;i++) {
+ *a = lutR[i*mult+1];
+ a+=4;
+ }
+ a = LUTRGBA+1;
+ for(i=0;i<lengthG;i++) {
+ *a = lutG[i*mult+1];
+ a+=4;
+ }
+ a = LUTRGBA+2;
+ for(i=0;i<lengthB;i++) {
+ *a = lutB[i*mult+1];
+ a+=4;
+ }
+ a = LUTRGBA+3;
+ for(i=0;i<256;i++) {
+ *a = 1; // Alpha component
+ a+=4;
+ }
+
+//How to free the now useless LUTs?
+
+//free(LutR); free(LutB); free(LutG);
+ return(LUTRGBA);
+}
- for (TagHT::iterator tag = entries.begin(); tag != entries.end(); ++tag){
- (*Result)[tag->second->GetFourth()].push_back(tag->second->GetName());
- }
- return Result;
+/**
+ * \ingroup gdcmHeader
+ * \brief gets the info from 0002,0010 : Transfert Syntax
+ * \ else 1.
+ * @return Transfert Syntax Name (as oposite to Transfert Syntax UID)
+ */
+std::string gdcmHeader::GetTransfertSyntaxName(void) {
+ // use the gdcmTS (TS : Transfert Syntax)
+ std::string TransfertSyntax = GetPubElValByNumber(0x0002,0x0010);
+ if (TransfertSyntax == GDCM_UNFOUND) {
+ dbg.Verbose(0, "gdcmHeader::GetTransfertSyntaxName: unfound Transfert Syntax (0002,0010)");
+ return "Uncompressed ACR-NEMA";
+ }
+ // we do it only when we need it
+ gdcmTS * ts = gdcmGlobal::GetTS();
+ std::string tsName=ts->GetValue(TransfertSyntax);
+ //delete ts; // Seg Fault when deleted ?!
+ return tsName;
}
-string gdcmHeader::GetPubElValByNumber(guint16 group, guint16 element) {
- return PubElVals.GetElValueByNumber(group, element);
+/**
+ * \ingroup gdcmHeader
+ * \brief Searches within the public dictionary for element value of
+ * a given tag.
+ * @param tagName name of the searched element.
+ * @return Corresponding element value when it exists, and the string
+ * GDCM_UNFOUND ("gdcm::Unfound") otherwise.
+ */
+std::string gdcmHeader::GetPubElValByName(std::string tagName) {
+ gdcmDictEntry *dictEntry = RefPubDict->GetTagByName(tagName);
+ if( dictEntry == NULL)
+ return GDCM_UNFOUND;
+ return(PubElValSet.GetElValueByNumber(dictEntry->GetGroup(),
+ dictEntry->GetElement()));
}
-string gdcmHeader::GetPubElValRepByNumber(guint16 group, guint16 element) {
- ElValue* elem = PubElVals.GetElementByNumber(group, element);
- if ( !elem )
- return "gdcm::Unfound";
- return elem->GetVR();
+/**
+ * \ingroup gdcmHeader
+ * \brief Searches within the elements parsed with the public dictionary for
+ * the element value representation of a given tag.
+ *
+ * Obtaining the VR (Value Representation) might be needed by caller
+ * to convert the string typed content to caller's native type
+ * (think of C++ vs Python). The VR is actually of a higher level
+ * of semantics than just the native C++ type.
+ * @param tagName name of the searched element.
+ * @return Corresponding element value representation when it exists,
+ * and the string GDCM_UNFOUND ("gdcm::Unfound") otherwise.
+ */
+std::string gdcmHeader::GetPubElValRepByName(std::string tagName) {
+ gdcmDictEntry *dictEntry = RefPubDict->GetTagByName(tagName);
+ if( dictEntry == NULL)
+ return GDCM_UNFOUND;
+ gdcmElValue* elem = PubElValSet.GetElementByNumber(
+ dictEntry->GetGroup(),
+ dictEntry->GetElement());
+ return elem->GetVR();
}
-string gdcmHeader::GetPubElValByName(string TagName) {
- return PubElVals.GetElValueByName(TagName);
+/**
+ * \ingroup gdcmHeader
+ * \brief Searches within the public dictionary for element value of
+ * a given tag.
+ * @param group Group of the researched tag.
+ * @param element Element of the researched tag.
+ * @return Corresponding element value when it exists, and the string
+ * GDCM_UNFOUND ("gdcm::Unfound") otherwise.
+ */
+std::string gdcmHeader::GetPubElValByNumber(guint16 group, guint16 element) {
+ return PubElValSet.GetElValueByNumber(group, element);
}
-string gdcmHeader::GetPubElValRepByName(string TagName) {
- ElValue* elem = PubElVals.GetElementByName(TagName);
- if ( !elem )
- return "gdcm::Unfound";
- return elem->GetVR();
+/**
+ * \ingroup gdcmHeader
+ * \brief Searches within the public dictionary for element value
+ * representation of a given tag.
+ *
+ * Obtaining the VR (Value Representation) might be needed by caller
+ * to convert the string typed content to caller's native type
+ * (think of C++ vs Python). The VR is actually of a higher level
+ * of semantics than just the native C++ type.
+ * @param group Group of the researched tag.
+ * @param element Element of the researched tag.
+ * @return Corresponding element value representation when it exists,
+ * and the string GDCM_UNFOUND ("gdcm::Unfound") otherwise.
+ */
+std::string gdcmHeader::GetPubElValRepByNumber(guint16 group, guint16 element) {
+ gdcmElValue* elem = PubElValSet.GetElementByNumber(group, element);
+ if ( !elem )
+ return GDCM_UNFOUND;
+ return elem->GetVR();
}
-string gdcmHeader::GetShaElValByNumber(guint16 group, guint16 element) {
- return ShaElVals.GetElValueByNumber(group, element);
+/**
+ * \ingroup gdcmHeader
+ * \brief Accesses an existing gdcmElValue in the PubElValSet of this instance
+ * through tag name and modifies it's content with the given value.
+ * @param content new value to substitute with
+ * @param tagName name of the tag to be modified
+ */
+bool gdcmHeader::SetPubElValByName(std::string content, std::string tagName) {
+ //return ( PubElValSet.SetElValueByName (content, tagName) );
+ gdcmDictEntry *dictEntry = RefPubDict->GetTagByName(tagName);
+ if( dictEntry == NULL)
+ return false;
+ return(PubElValSet.SetElValueByNumber(content,
+ dictEntry->GetGroup(),
+ dictEntry->GetElement()));
}
-string gdcmHeader::GetShaElValRepByNumber(guint16 group, guint16 element) {
- ElValue* elem = ShaElVals.GetElementByNumber(group, element);
- if ( !elem )
- return "gdcm::Unfound";
- return elem->GetVR();
+/**
+ * \ingroup gdcmHeader
+ * \brief Accesses an existing gdcmElValue (i.e. a Dicom Element)
+ * in the PubElValSet of this instance
+ * through it's (group, element) and modifies it's content with
+ * the given value.
+ * @param content new value to substitute with
+ * @param group group of the Dicom Element to modify
+ * @param element element of the Dicom Element to modify
+ */
+bool gdcmHeader::SetPubElValByNumber(std::string content, guint16 group,
+ guint16 element)
+
+//TODO : homogeneiser les noms : SetPubElValByNumber
+// qui appelle PubElValSet.SetElValueByNumber
+// pourquoi pas SetPubElValueByNumber ??
+{
+ return ( PubElValSet.SetElValueByNumber (content, group, element) );
}
-string gdcmHeader::GetShaElValByName(string TagName) {
- return ShaElVals.GetElValueByName(TagName);
+/**
+ * \ingroup gdcmHeader
+ * \brief Accesses an existing gdcmElValue in the PubElValSet of this instance
+ * through it's (group, element) and modifies it's length with
+ * the given value.
+ * \warning Use with extreme caution.
+ * @param length new length to substitute with
+ * @param group group of the ElVal to modify
+ * @param element element of the ElVal to modify
+ * @return 1 on success, 0 otherwise.
+ */
+
+bool gdcmHeader::SetPubElValLengthByNumber(guint32 length, guint16 group,
+ guint16 element) {
+ return ( PubElValSet.SetElValueLengthByNumber (length, group, element) );
}
-string gdcmHeader::GetShaElValRepByName(string TagName) {
- ElValue* elem = ShaElVals.GetElementByName(TagName);
- if ( !elem )
- return "gdcm::Unfound";
- return elem->GetVR();
+/**
+ * \ingroup gdcmHeader
+ * \brief Searches within elements parsed with the public dictionary
+ * and then within the elements parsed with the shadow dictionary
+ * for the element value of a given tag.
+ * @param tagName name of the searched element.
+ * @return Corresponding element value when it exists,
+ * and the string GDCM_UNFOUND ("gdcm::Unfound") otherwise.
+ */
+std::string gdcmHeader::GetElValByName(std::string tagName) {
+ std::string pub = GetPubElValByName(tagName);
+ return pub;
}
+/**
+ * \ingroup gdcmHeader
+ * \brief Searches within elements parsed with the public dictionary
+ * and then within the elements parsed with the shadow dictionary
+ * for the element value representation of a given tag.
+ *
+ * Obtaining the VR (Value Representation) might be needed by caller
+ * to convert the string typed content to caller's native type
+ * (think of C++ vs Python). The VR is actually of a higher level
+ * of semantics than just the native C++ type.
+ * @param tagName name of the searched element.
+ * @return Corresponding element value representation when it exists,
+ * and the string GDCM_UNFOUND ("gdcm::Unfound") otherwise.
+ */
+std::string gdcmHeader::GetElValRepByName(std::string tagName) {
+ std::string pub = GetPubElValRepByName(tagName);
+ return pub;
+}
-string gdcmHeader::GetElValByNumber(guint16 group, guint16 element) {
- string pub = GetPubElValByNumber(group, element);
- if (pub.length())
- return pub;
- return GetShaElValByNumber(group, element);
+/**
+ * \ingroup gdcmHeader
+ * \brief Searches within elements parsed with the public dictionary
+ * and then within the elements parsed with the shadow dictionary
+ * for the element value of a given tag.
+ * @param group Group of the searched tag.
+ * @param element Element of the searched tag.
+ * @return Corresponding element value representation when it exists,
+ * and the string GDCM_UNFOUND ("gdcm::Unfound") otherwise.
+ */
+std::string gdcmHeader::GetElValByNumber(guint16 group, guint16 element) {
+ std::string pub = GetPubElValByNumber(group, element);
+ return pub;
}
-string gdcmHeader::GetElValRepByNumber(guint16 group, guint16 element) {
- string pub = GetPubElValRepByNumber(group, element);
- if (pub.length())
- return pub;
- return GetShaElValRepByNumber(group, element);
+/**
+ * \ingroup gdcmHeader
+ * \brief Searches within elements parsed with the public dictionary
+ * and then within the elements parsed with the shadow dictionary
+ * for the element value representation of a given tag.
+ *
+ * Obtaining the VR (Value Representation) might be needed by caller
+ * to convert the string typed content to caller's native type
+ * (think of C++ vs Python). The VR is actually of a higher level
+ * of semantics than just the native C++ type.
+ * @param group Group of the searched tag.
+ * @param element Element of the searched tag.
+ * @return Corresponding element value representation when it exists,
+ * and the string GDCM_UNFOUND ("gdcm::Unfound") otherwise.
+ */
+std::string gdcmHeader::GetElValRepByNumber(guint16 group, guint16 element) {
+ std::string pub = GetPubElValRepByNumber(group, element);
+ return pub;
}
-string gdcmHeader::GetElValByName(string TagName) {
- string pub = GetPubElValByName(TagName);
- if (pub.length())
- return pub;
- return GetShaElValByName(TagName);
+/**
+ * \ingroup gdcmElValSet
+ * \brief Sets the value (string) of the target Dicom Element
+ * @param content string value of the Dicom Element
+ * @param tagName name of the searched Dicom Element.
+ * @return true when found
+ */
+bool gdcmHeader::SetElValueByName(std::string content,
+ std::string tagName) {
+
+ gdcmDictEntry *dictEntry = RefPubDict->GetTagByName(tagName);
+ if( dictEntry == NULL)
+ return false;
+
+
+ TagKey key = gdcmDictEntry::TranslateToKey(dictEntry->GetGroup(),
+ dictEntry->GetElement());
+ if ( ! PubElValSet.GetTagHt().count(key))
+ return false;
+ int l = content.length();
+ if(l%2) { // Odd length are padded with a space (020H).
+ l++;
+ content = content + '\0';
+ }
+
+ //tagHt[key]->SetValue(content);
+ gdcmElValue * a;
+ IterHT p;
+ TagElValueHT::iterator p2;
+ // DO NOT remove the following lines : they explain the stuff
+ //p= tagHt.equal_range(key); // get a pair of iterators first-last synonym
+ //p2=p.first; // iterator on the first synonym
+ //a=p2->second; // H Table target column (2-nd col)
+
+ // or, easier :
+ a = ((PubElValSet.GetTagHt().equal_range(key)).first)->second;
+
+ a-> SetValue(content);
+
+ //std::string vr = tagHt[key]->GetVR();
+ std::string vr = a->GetVR();
+
+ guint32 lgr;
+ if( (vr == "US") || (vr == "SS") )
+ lgr = 2;
+ else if( (vr == "UL") || (vr == "SL") )
+ lgr = 4;
+ else
+ lgr = l;
+ //tagHt[key]->SetLength(lgr);
+ a->SetLength(lgr);
+ return true;
}
-string gdcmHeader::GetElValRepByName(string TagName) {
- string pub = GetPubElValRepByName(TagName);
- if (pub.length())
- return pub;
- return GetShaElValRepByName(TagName);
+/**
+ * \ingroup gdcmHeader
+ * \brief
+ * @param exception_on_error
+ * @return
+ */
+FILE *gdcmHeader::OpenFile(bool exception_on_error)
+ throw(gdcmFileError) {
+ fp=fopen(filename.c_str(),"rb");
+ if(exception_on_error) {
+ if(!fp)
+ throw gdcmFileError("gdcmHeader::gdcmHeader(const char *, bool)");
+ }
+
+ if ( fp ) {
+ guint16 zero;
+ fread(&zero, (size_t)2, (size_t)1, fp);
+
+ //ACR -- or DICOM with no Preamble
+ if( zero == 0x0008 || zero == 0x0800 || zero == 0x0002 || zero == 0x0200)
+ return(fp);
+
+ //DICOM
+ fseek(fp, 126L, SEEK_CUR);
+ char dicm[4];
+ fread(dicm, (size_t)4, (size_t)1, fp);
+ if( memcmp(dicm, "DICM", 4) == 0 )
+ return(fp);
+
+ fclose(fp);
+ dbg.Verbose(0, "gdcmHeader::gdcmHeader not DICOM/ACR", filename.c_str());
+ }
+ else {
+ dbg.Verbose(0, "gdcmHeader::gdcmHeader cannot open file", filename.c_str());
+ }
+ return(NULL);
}
/**
* \ingroup gdcmHeader
- * \brief Modifie la valeur d'un ElValue déja existant
- * \ dans le PubElVals du gdcmHeader,
- * \ accédé par ses numero de groupe et d'element.
+ * \brief
+ * @return TRUE if the close was successfull
*/
-int gdcmHeader::SetPubElValByNumber(string content, guint16 group, guint16 element) {
- //TagKey key = gdcmDictEntry::TranslateToKey(group, element);
- //PubElVals.tagHt[key]->SetValue(content);
-
- return ( PubElVals.SetElValueByNumber (content, group, element) );
+bool gdcmHeader::CloseFile(void) {
+ int closed = fclose(fp);
+ fp = (FILE *)0;
+ if (! closed)
+ return false;
+ return true;
}
+/**
+ * \ingroup gdcmHeader
+ * \brief Parses the header of the file but WITHOUT loading element values.
+ */
+void gdcmHeader::ParseHeader(bool exception_on_error) throw(gdcmFormatError) {
+ gdcmElValue * newElValue = (gdcmElValue *)0;
+
+ rewind(fp);
+ CheckSwap();
+ while ( (newElValue = ReadNextElement()) ) {
+ SkipElementValue(newElValue);
+ PubElValSet.Add(newElValue);
+ }
+}
/**
* \ingroup gdcmHeader
- * \brief Modifie la valeur d'un ElValue déja existant
- * \ dans le PubElVals du gdcmHeader,
- * \ accédé par son nom
+ * \brief
+ * @return integer, acts as a Boolean
+ */
+bool gdcmHeader::Write(FILE * fp, FileType type) {
+
+ // TODO : move the following lines (and a lot of others, to be written)
+ // to a future function CheckAndCorrectHeader
+
+ if (type == ImplicitVR) {
+ std::string implicitVRTransfertSyntax = "1.2.840.10008.1.2";
+ ReplaceOrCreateByNumber(implicitVRTransfertSyntax,0x0002, 0x0010);
+
+ //FIXME Refer to standards on page 21, chapter 6.2 "Value representation":
+ // values with a VR of UI shall be padded with a single trailing null
+ // Dans le cas suivant on doit pader manuellement avec un 0
+
+ PubElValSet.SetElValueLengthByNumber(18, 0x0002, 0x0010);
+ }
+
+ if (type == ExplicitVR) {
+ std::string explicitVRTransfertSyntax = "1.2.840.10008.1.2.1";
+ ReplaceOrCreateByNumber(explicitVRTransfertSyntax,0x0002, 0x0010);
+
+ //FIXME Refer to standards on page 21, chapter 6.2 "Value representation":
+ // values with a VR of UI shall be padded with a single trailing null
+ // Dans le cas suivant on doit pader manuellement avec un 0
+
+ PubElValSet.SetElValueLengthByNumber(20, 0x0002, 0x0010);
+ }
+
+ return PubElValSet.Write(fp, type);
+}
+
+/**
+ * \ingroup gdcmFile
+ * \brief Sets the Pixel Area size in the Header
+ * --> not-for-rats function
+ *
+ * \warning WARNING doit-etre etre publique ?
+ * TODO : y aurait il un inconvenient à fusionner ces 2 fonctions
+ *
+ * @param ImageDataSize new Pixel Area Size
+ * warning : nothing else is checked
*/
-int gdcmHeader::SetPubElValByName(string content, string TagName) {
- //TagKey key = gdcmDictEntry::TranslateToKey(group, element);
- //PubElVals.tagHt[key]->SetValue(content);
-
- return ( PubElVals.SetElValueByName (content, TagName) );
+void gdcmHeader::SetImageDataSize(size_t ImageDataSize) {
+ std::string content1;
+ char car[20];
+ // Assumes ElValue (0x7fe0, 0x0010) exists ...
+ sprintf(car,"%d",ImageDataSize);
+
+ gdcmElValue *a = GetElValueByNumber(0x7fe0, 0x0010);
+ a->SetLength(ImageDataSize);
+
+ ImageDataSize+=8;
+ sprintf(car,"%d",ImageDataSize);
+ content1=car;
+ SetPubElValByNumber(content1, 0x7fe0, 0x0000);
}
+/**
+ * \ingroup gdcmHeader
+ * \brief Swaps back the bytes of 4-byte long integer accordingly to
+ * processor order.
+ * @return The properly swaped 32 bits integer.
+ */
+guint32 gdcmHeader::SwapLong(guint32 a) {
+ switch (sw) {
+ case 0 :
+ break;
+ case 4321 :
+ a=( ((a<<24) & 0xff000000) | ((a<<8) & 0x00ff0000) |
+ ((a>>8) & 0x0000ff00) | ((a>>24) & 0x000000ff) );
+ break;
+
+ case 3412 :
+ a=( ((a<<16) & 0xffff0000) | ((a>>16) & 0x0000ffff) );
+ break;
+
+ case 2143 :
+ a=( ((a<<8) & 0xff00ff00) | ((a>>8) & 0x00ff00ff) );
+ break;
+ default :
+ dbg.Error(" gdcmHeader::SwapLong : unset swap code");
+ a=0;
+ }
+ return(a);
+}
/**
* \ingroup gdcmHeader
- * \brief Modifie la valeur d'un ElValue déja existant
- * \ dans le ShaElVals du gdcmHeader,
- * \ accédé par ses numero de groupe et d'element.
+ * \brief Swaps the bytes so they agree with the processor order
+ * @return The properly swaped 16 bits integer.
*/
-int gdcmHeader::SetShaElValByNumber(string content, guint16 group, guint16 element) {
-
- return ( ShaElVals.SetElValueByNumber (content, group, element) );
+guint16 gdcmHeader::SwapShort(guint16 a) {
+ if ( (sw==4321) || (sw==2143) )
+ a =(((a<<8) & 0x0ff00) | ((a>>8)&0x00ff));
+ return (a);
}
+//-----------------------------------------------------------------------------
+// Protected
+/**
+ * \ingroup gdcmHeader
+ * \brief
+ *
+ * @return
+ */
+gdcmElValue* gdcmHeader::GetElValueByNumber(guint16 Group, guint16 Elem) {
+
+ gdcmElValue* elValue = PubElValSet.GetElementByNumber(Group, Elem);
+ if (!elValue) {
+ dbg.Verbose(1, "gdcmHeader::GetElValueByNumber",
+ "failed to Locate gdcmElValue");
+ return (gdcmElValue*)0;
+ }
+ return elValue;
+}
/**
* \ingroup gdcmHeader
- * \brief Modifie la valeur d'un ElValue déja existant
- * \ dans le ShaElVals du gdcmHeader,
- * \ accédé par son nom
+ * \brief Checks if a given ElValue (group,number)
+ * \ exists in the Public ElValSet
+ * @param Group
+ * @param Elem
+ * @return integer acts as a boolean
*/
-int gdcmHeader::SetShaElValByName(string content, string TagName) {
-
- return ( ShaElVals.SetElValueByName (content, TagName) );
+bool gdcmHeader::CheckIfExistByNumber(guint16 Group, guint16 Elem ) {
+ return (PubElValSet.CheckIfExistByNumber(Group, Elem)>0);
}
+
/**
* \ingroup gdcmHeader
- * \brief Parses the header of the file but does NOT load element values.
+ * \brief Gets (from Header) the offset of a 'non string' element value
+ * \ (LoadElementValue has already be executed)
+ * @param Group
+ * @param Elem
+ * @return File Offset of the Element Value
*/
-void gdcmHeader::ParseHeader(void) {
- ElValue * newElValue = (ElValue *)0;
-
- rewind(fp);
- CheckSwap();
- while ( (newElValue = ReadNextElement()) ) {
- SkipElementValue(newElValue);
- PubElVals.Add(newElValue);
- }
+size_t gdcmHeader::GetPubElValOffsetByNumber(guint16 Group, guint16 Elem) {
+ gdcmElValue* elValue = PubElValSet.GetElementByNumber(Group, Elem);
+ if (!elValue) {
+ dbg.Verbose(1, "gdcmHeader::GetElValueByNumber",
+ "failed to Locate gdcmElValue");
+ return (size_t)0;
+ }
+ return elValue->GetOffset();
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief Gets (from Header) a 'non string' element value
+ * \ (LoadElementValue has already be executed)
+ * @param Group
+ * @param Elem
+ * @return Pointer to the 'non string' area
+ */
+void * gdcmHeader::GetPubElValVoidAreaByNumber(guint16 Group, guint16 Elem) {
+ gdcmElValue* elValue = PubElValSet.GetElementByNumber(Group, Elem);
+ if (!elValue) {
+ dbg.Verbose(1, "gdcmHeader::GetElValueByNumber",
+ "failed to Locate gdcmElValue");
+ return (NULL);
+ }
+ return elValue->GetVoidArea();
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief Loads (from disk) the element content
+ * when a string is not suitable
+ */
+void * gdcmHeader::LoadElementVoidArea(guint16 Group, guint16 Elem) {
+ gdcmElValue * Element= PubElValSet.GetElementByNumber(Group, Elem);
+ if ( !Element )
+ return NULL;
+ size_t o =(size_t)Element->GetOffset();
+ fseek(fp, o, SEEK_SET);
+ int l=Element->GetLength();
+ void * a = malloc(l);
+ if(!a) {
+ return NULL;
+ }
+ /* int res = */ PubElValSet.SetVoidAreaByNumber(a, Group, Elem);
+ // TODO check the result
+ size_t l2 = fread(a, 1, l ,fp);
+ if(l != l2) {
+ free(a);
+ return NULL;
+ }
+ return a;
}
+/**
+ * \ingroup gdcmHeader
+ * \brief TODO
+ * @param Value
+ * @param Group
+ * @param Elem
+ * \return integer acts as a boolean
+ */
+bool gdcmHeader::ReplaceOrCreateByNumber(std::string Value,
+ guint16 Group, guint16 Elem ) {
+ // TODO : FIXME JPRx
+ // curieux, non ?
+ // on (je) cree une Elvalue ne contenant pas de valeur
+ // on l'ajoute au ElValSet
+ // on affecte une valeur a cette ElValue a l'interieur du ElValSet
+ // --> devrait pouvoir etre fait + simplement ???
+ if (CheckIfExistByNumber(Group, Elem) == 0) {
+ gdcmElValue* a =NewElValueByNumber(Group, Elem);
+ if (a == NULL)
+ return false;
+ PubElValSet.Add(a);
+ }
+ PubElValSet.SetElValueByNumber(Value, Group, Elem);
+ return(true);
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief Modify (or Creates if not found) an element
+ * @param Value new value
+ * @param Group
+ * @param Elem
+ * \return integer acts as a boolean
+ *
+ */
+bool gdcmHeader::ReplaceOrCreateByNumber(char* Value, guint16 Group, guint16 Elem ) {
+
+ gdcmElValue* nvElValue=NewElValueByNumber(Group, Elem);
+ // TODO : check if fails
+ PubElValSet.Add(nvElValue);
+ std::string v = Value;
+ PubElValSet.SetElValueByNumber(v, Group, Elem);
+ return(true);
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief Set a new value if the invoked element exists
+ * Seems to be useless !!!
+ * @param Value
+ * @param Group
+ * @param Elem
+ * \return integer acts as a boolean
+ */
+bool gdcmHeader::ReplaceIfExistByNumber(char* Value, guint16 Group, guint16 Elem ) {
+
+ //gdcmElValue* elValue = PubElValSet.GetElementByNumber(Group, Elem);
+ std::string v = Value;
+ PubElValSet.SetElValueByNumber(v, Group, Elem);
+ return true;
+}
+
+//-----------------------------------------------------------------------------
+// Private
/**
* \ingroup gdcmHeader
* \brief Loads the element values of all the elements present in the
* public tag based hash table.
*/
void gdcmHeader::LoadElements(void) {
+ rewind(fp);
+
+ // We don't use any longer the HashTable, since a lot a stuff is missing
+ // when SeQuences were encountered
+ //
+ //TagElValueHT ht = PubElValSet.GetTagHt();
+ //for (TagElValueHT::iterator tag = ht.begin(); tag != ht.end(); ++tag) {
+ // LoadElementValue(tag->second);
+ //}
+
+ for (ListTag::iterator i = GetPubListElem().begin();
+ i != GetPubListElem().end();
+ ++i){
+ LoadElementValue(*i);
+ }
+
+ rewind(fp);
+
+ // Load 'non string' values
+ std::string PhotometricInterpretation = GetPubElValByNumber(0x0028,0x0004);
+ if( PhotometricInterpretation == "PALETTE COLOR " ){
+ LoadElementVoidArea(0x0028,0x1200); // gray LUT
+ LoadElementVoidArea(0x0028,0x1201); // R LUT
+ LoadElementVoidArea(0x0028,0x1202); // G LUT
+ LoadElementVoidArea(0x0028,0x1203); // B LUT
+
+ LoadElementVoidArea(0x0028,0x1221); // Segmented Red Palette Color LUT Data
+ LoadElementVoidArea(0x0028,0x1222); // Segmented Green Palette Color LUT Data
+ LoadElementVoidArea(0x0028,0x1223); // Segmented Blue Palette Color LUT Data
+ }
+
+ // --------------------------------------------------------------
+ // Special Patch to allow gdcm to read ACR-LibIDO formated images
+ //
+ // if recognition code tells us we deal with a LibIDO image
+ // we switch lineNumber and columnNumber
+ //
+ std::string RecCode;
+ RecCode = GetPubElValByNumber(0x0008, 0x0010);
+ if (RecCode == "ACRNEMA_LIBIDO_1.1" ||
+ RecCode == "CANRME_AILIBOD1_1." ) {
+ filetype = ACR_LIBIDO;
+ std::string rows = GetPubElValByNumber(0x0028, 0x0010);
+ std::string columns = GetPubElValByNumber(0x0028, 0x0011);
+ SetPubElValByNumber(columns, 0x0028, 0x0010);
+ SetPubElValByNumber(rows , 0x0028, 0x0011);
+ }
+ // ----------------- End of Special Patch ----------------
+}
- rewind(fp);
+/**
+ * \ingroup gdcmHeader
+ * \brief Loads the element content if it's length is not bigger
+ * than the value specified with
+ * gdcmHeader::SetMaxSizeLoadElementValue()
+ * @param ElVal string value of the Dicom Element
+ */
+void gdcmHeader::LoadElementValue(gdcmElValue * ElVal) {
+ size_t item_read;
+ guint16 group = ElVal->GetGroup();
+ std::string vr= ElVal->GetVR();
+ guint32 length = ElVal->GetLength();
+ bool SkipLoad = false;
+
+ fseek(fp, (long)ElVal->GetOffset(), SEEK_SET);
+
+ // the test was commented out to 'go inside' the SeQuences
+ // we don't any longer skip them !
+
+ // if( vr == "SQ" )
+ // SkipLoad = true;
+
+ // A SeQuence "contains" a set of Elements.
+ // (fffe e000) tells us an Element is beginning
+ // (fffe e00d) tells us an Element just ended
+ // (fffe e0dd) tells us the current SeQuence just ended
+ if( group == 0xfffe )
+ SkipLoad = true;
+
+ if ( SkipLoad ) {
+ ElVal->SetLength(0);
+ ElVal->SetValue("gdcm::Skipped");
+ return;
+ }
+
+ // When the length is zero things are easy:
+ if ( length == 0 ) {
+ ElVal->SetValue("");
+ return;
+ }
+
+ // The elements whose length is bigger than the specified upper bound
+ // are not loaded. Instead we leave a short notice of the offset of
+ // the element content and it's length.
+ if (length > MaxSizeLoadElementValue) {
+ std::ostringstream s;
+ s << "gdcm::NotLoaded.";
+ s << " Address:" << (long)ElVal->GetOffset();
+ s << " Length:" << ElVal->GetLength();
+ s << " x(" << std::hex << ElVal->GetLength() << ")";
+ ElVal->SetValue(s.str());
+ return;
+ }
+
+ // When an integer is expected, read and convert the following two or
+ // four bytes properly i.e. as an integer as opposed to a string.
+
+ // Actually, elements with Value Multiplicity > 1
+ // contain a set of integers (not a single one)
+ // Any compacter code suggested (?)
+ if ( IsAnInteger(ElVal) ) {
+ guint32 NewInt;
+ std::ostringstream s;
+ int nbInt;
+ if (vr == "US" || vr == "SS") {
+ nbInt = length / 2;
+ NewInt = ReadInt16();
+ s << NewInt;
+ if (nbInt > 1) {
+ for (int i=1; i < nbInt; i++) {
+ s << '\\';
+ NewInt = ReadInt16();
+ s << NewInt;
+ }
+ }
+
+ } else if (vr == "UL" || vr == "SL") {
+ nbInt = length / 4;
+ NewInt = ReadInt32();
+ s << NewInt;
+ if (nbInt > 1) {
+ for (int i=1; i < nbInt; i++) {
+ s << '\\';
+ NewInt = ReadInt32();
+ s << NewInt;
+ }
+ }
+ }
+#ifdef GDCM_NO_ANSI_STRING_STREAM
+ s << std::ends; // to avoid oddities on Solaris
+#endif //GDCM_NO_ANSI_STRING_STREAM
+ ElVal->SetValue(s.str());
+ return;
+ }
+
+ // We need an additional byte for storing \0 that is not on disk
+ char* NewValue = (char*)malloc(length+1);
+ if( !NewValue) {
+ dbg.Verbose(1, "LoadElementValue: Failed to allocate NewValue");
+ return;
+ }
+ NewValue[length]= 0;
+
+ item_read = fread(NewValue, (size_t)length, (size_t)1, fp);
+ if ( item_read != 1 ) {
+ free(NewValue);
+ dbg.Verbose(1, "gdcmHeader::LoadElementValue","unread element value");
+ ElVal->SetValue("gdcm::UnRead");
+ return;
+ }
+ ElVal->SetValue(NewValue);
+ free(NewValue);
+}
- TagElValueHT ht = PubElVals.GetTagHt();
+/**
+ * \ingroup gdcmHeader
+ * \brief Loads the element while preserving the current
+ * underlying file position indicator as opposed to
+ * to LoadElementValue that modifies it.
+ * @param ElVal Element whose value shall be loaded.
+ * @return
+ */
+void gdcmHeader::LoadElementValueSafe(gdcmElValue * ElVal) {
+ long PositionOnEntry = ftell(fp);
+ LoadElementValue(ElVal);
+ fseek(fp, PositionOnEntry, SEEK_SET);
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief
+ *
+ * @return
+ */
+ void gdcmHeader::FindLength (gdcmElValue * ElVal) {
+ guint16 element = ElVal->GetElement();
+ guint16 group = ElVal->GetGroup();
+ std::string vr = ElVal->GetVR();
+ guint16 length16;
+ if( (element == 0x0010) && (group == 0x7fe0) ) {
+ dbg.SetDebug(-1);
+ dbg.Verbose(2, "gdcmHeader::FindLength: ",
+ "we reached 7fe0 0010");
+ }
+
+ if ( (filetype == ExplicitVR) && ! ElVal->IsImplicitVr() ) {
+ if ( (vr=="OB") || (vr=="OW") || (vr=="SQ") || (vr=="UN") ) {
+
+ // The following reserved two bytes (see PS 3.5-2001, section
+ // 7.1.2 Data element structure with explicit vr p27) must be
+ // skipped before proceeding on reading the length on 4 bytes.
+ fseek(fp, 2L, SEEK_CUR);
+
+ guint32 length32 = ReadInt32();
+
+ if ( (vr == "OB") && (length32 == 0xffffffff) ) {
+ ElVal->SetLength(FindLengthOB());
+ return;
+ }
+ FixFoundLength(ElVal, length32);
+ return;
+ }
+
+ // Length is encoded on 2 bytes.
+ length16 = ReadInt16();
+
+ // We can tell the current file is encoded in big endian (like
+ // Data/US-RGB-8-epicard) when we find the "Transfer Syntax" tag
+ // and it's value is the one of the encoding of a big endian file.
+ // In order to deal with such big endian encoded files, we have
+ // (at least) two strategies:
+ // * when we load the "Transfer Syntax" tag with value of big endian
+ // encoding, we raise the proper flags. Then we wait for the end
+ // of the META group (0x0002) among which is "Transfer Syntax",
+ // before switching the swap code to big endian. We have to postpone
+ // the switching of the swap code since the META group is fully encoded
+ // in little endian, and big endian coding only starts at the next
+ // group. The corresponding code can be hard to analyse and adds
+ // many additional unnecessary tests for regular tags.
+ // * the second strategy consists in waiting for trouble, that shall
+ // appear when we find the first group with big endian encoding. This
+ // is easy to detect since the length of a "Group Length" tag (the
+ // ones with zero as element number) has to be of 4 (0x0004). When we
+ // encounter 1024 (0x0400) chances are the encoding changed and we
+ // found a group with big endian encoding.
+ // We shall use this second strategy. In order to make sure that we
+ // can interpret the presence of an apparently big endian encoded
+ // length of a "Group Length" without committing a big mistake, we
+ // add an additional check: we look in the already parsed elements
+ // for the presence of a "Transfer Syntax" whose value has to be "big
+ // endian encoding". When this is the case, chances are we have got our
+ // hands on a big endian encoded file: we switch the swap code to
+ // big endian and proceed...
+ if ( (element == 0x0000) && (length16 == 0x0400) ) {
+ if ( ! IsExplicitVRBigEndianTransferSyntax() ) {
+ dbg.Verbose(0, "gdcmHeader::FindLength", "not explicit VR");
+ errno = 1;
+ return;
+ }
+ length16 = 4;
+ SwitchSwapToBigEndian();
+ // Restore the unproperly loaded values i.e. the group, the element
+ // and the dictionary entry depending on them.
+ guint16 CorrectGroup = SwapShort(ElVal->GetGroup());
+ guint16 CorrectElem = SwapShort(ElVal->GetElement());
+ gdcmDictEntry * NewTag = GetDictEntryByNumber(CorrectGroup,
+ CorrectElem);
+ if (!NewTag) {
+ // This correct tag is not in the dictionary. Create a new one.
+ NewTag = new gdcmDictEntry(CorrectGroup, CorrectElem);
+ }
+ // FIXME this can create a memory leaks on the old entry that be
+ // left unreferenced.
+ ElVal->SetDictEntry(NewTag);
+ }
+
+ // Heuristic: well some files are really ill-formed.
+ if ( length16 == 0xffff) {
+ length16 = 0;
+ //dbg.Verbose(0, "gdcmHeader::FindLength",
+ // "Erroneous element length fixed.");
+ // Actually, length= 0xffff means that we deal with
+ // Unknown Sequence Length
+ }
+
+ FixFoundLength(ElVal, (guint32)length16);
+ return;
+ }
+
+ // Either implicit VR or a non DICOM conformal (see not below) explicit
+ // VR that ommited the VR of (at least) this element. Farts happen.
+ // [Note: according to the part 5, PS 3.5-2001, section 7.1 p25
+ // on Data elements "Implicit and Explicit VR Data Elements shall
+ // not coexist in a Data Set and Data Sets nested within it".]
+ // Length is on 4 bytes.
+ FixFoundLength(ElVal, ReadInt32());
+ return;
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief Find the value representation of the current tag.
+ * @param ElVal
+ */
+void gdcmHeader::FindVR( gdcmElValue *ElVal) {
+ if (filetype != ExplicitVR)
+ return;
+
+ char VR[3];
+ std::string vr;
+ int lgrLue;
+ char msg[100]; // for sprintf. Sorry
+
+ long PositionOnEntry = ftell(fp);
+ // Warning: we believe this is explicit VR (Value Representation) because
+ // we used a heuristic that found "UL" in the first tag. Alas this
+ // doesn't guarantee that all the tags will be in explicit VR. In some
+ // cases (see e-film filtered files) one finds implicit VR tags mixed
+ // within an explicit VR file. Hence we make sure the present tag
+ // is in explicit VR and try to fix things if it happens not to be
+ // the case.
+ bool RealExplicit = true;
+
+ lgrLue=fread (&VR, (size_t)2,(size_t)1, fp);
+ VR[2]=0;
+ vr = std::string(VR);
+
+ // Assume we are reading a falsely explicit VR file i.e. we reached
+ // a tag where we expect reading a VR but are in fact we read the
+ // first to bytes of the length. Then we will interogate (through find)
+ // the dicom_vr dictionary with oddities like "\004\0" which crashes
+ // both GCC and VC++ implementations of the STL map. Hence when the
+ // expected VR read happens to be non-ascii characters we consider
+ // we hit falsely explicit VR tag.
+
+ if ( (!isalpha(VR[0])) && (!isalpha(VR[1])) )
+ RealExplicit = false;
+
+ // CLEANME searching the dicom_vr at each occurence is expensive.
+ // PostPone this test in an optional integrity check at the end
+ // of parsing or only in debug mode.
+ if ( RealExplicit && !dicom_vr->Count(vr) )
+ RealExplicit= false;
+
+ if ( RealExplicit ) {
+ if ( ElVal->IsVRUnknown() ) {
+ // When not a dictionary entry, we can safely overwrite the vr.
+ ElVal->SetVR(vr);
+ return;
+ }
+ if ( ElVal->GetVR() == vr ) {
+ // The vr we just read and the dictionary agree. Nothing to do.
+ return;
+ }
+ // The vr present in the file and the dictionary disagree. We assume
+ // the file writer knew best and use the vr of the file. Since it would
+ // be unwise to overwrite the vr of a dictionary (since it would
+ // compromise it's next user), we need to clone the actual DictEntry
+ // and change the vr for the read one.
+ gdcmDictEntry* NewTag = new gdcmDictEntry(ElVal->GetGroup(),
+ ElVal->GetElement(),
+ vr,
+ "FIXME",
+ ElVal->GetName());
+ ElVal->SetDictEntry(NewTag);
+ return;
+ }
+
+ // We thought this was explicit VR, but we end up with an
+ // implicit VR tag. Let's backtrack.
+
+ sprintf(msg,"Falsely explicit vr file (%04x,%04x)\n",
+ ElVal->GetGroup(),ElVal->GetElement());
+ dbg.Verbose(1, "gdcmHeader::FindVR: ",msg);
+
+ fseek(fp, PositionOnEntry, SEEK_SET);
+ // When this element is known in the dictionary we shall use, e.g. for
+ // the semantics (see the usage of IsAnInteger), the vr proposed by the
+ // dictionary entry. Still we have to flag the element as implicit since
+ // we know now our assumption on expliciteness is not furfilled.
+ // avoid .
+ if ( ElVal->IsVRUnknown() )
+ ElVal->SetVR("Implicit");
+ ElVal->SetImplicitVr();
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief
+ *
+ * @return
+ */
+ guint32 gdcmHeader::FindLengthOB(void) {
+ // See PS 3.5-2001, section A.4 p. 49 on encapsulation of encoded pixel data.
+ guint16 g;
+ guint16 n;
+ long PositionOnEntry = ftell(fp);
+ bool FoundSequenceDelimiter = false;
+ guint32 TotalLength = 0;
+ guint32 ItemLength;
+
+ while ( ! FoundSequenceDelimiter) {
+ g = ReadInt16();
+ n = ReadInt16();
+ if (errno == 1)
+ return 0;
+ TotalLength += 4; // We even have to decount the group and element
+
+ if ( g != 0xfffe && g!=0xb00c ) /*for bogus header */ {
+ char msg[100]; // for sprintf. Sorry
+ sprintf(msg,"wrong group (%04x) for an item sequence (%04x,%04x)\n",g, g,n);
+ dbg.Verbose(1, "gdcmHeader::FindLengthOB: ",msg);
+ errno = 1;
+ return 0;
+ }
+ if ( n == 0xe0dd || ( g==0xb00c && n==0x0eb6 ) ) /* for bogus header */
+ FoundSequenceDelimiter = true;
+ else if ( n != 0xe000 ){
+ char msg[100]; // for sprintf. Sorry
+ sprintf(msg,"wrong element (%04x) for an item sequence (%04x,%04x)\n",
+ n, g,n);
+ dbg.Verbose(1, "gdcmHeader::FindLengthOB: ",msg);
+ errno = 1;
+ return 0;
+ }
+ ItemLength = ReadInt32();
+ TotalLength += ItemLength + 4; // We add 4 bytes since we just read
+ // the ItemLength with ReadInt32
+ SkipBytes(ItemLength);
+ }
+ fseek(fp, PositionOnEntry, SEEK_SET);
+ return TotalLength;
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief
+ * @param ElVal
+ * @return
+ */
+void gdcmHeader::SkipElementValue(gdcmElValue * ElVal) {
+ SkipBytes(ElVal->GetLength());
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief When the length of an element value is obviously wrong (because
+ * the parser went Jabberwocky) one can hope improving things by
+ * applying this heuristic.
+ */
+void gdcmHeader::FixFoundLength(gdcmElValue * ElVal, guint32 FoundLength) {
+
+ ElVal->SetReadLength(FoundLength); // will be updated only if a bug is found
+
+ if ( FoundLength == 0xffffffff) {
+ FoundLength = 0;
+ }
+
+ // Sorry for the patch!
+ // XMedCom did the trick to read some nasty GE images ...
+ else if (FoundLength == 13) {
+ // The following 'if' will be removed when there is no more
+ // images on Creatis HDs with a 13 length for Manufacturer...
+ if ( (ElVal->GetGroup() != 0x0008) ||
+ ( (ElVal->GetElement() != 0x0070) && (ElVal->GetElement() != 0x0080) ) ) {
+ // end of remove area
+ FoundLength =10;
+ ElVal->SetReadLength(10); // a bug is to be fixed
+ }
+ }
+ // to fix some garbage 'Leonardo' Siemens images
+ // May be commented out to avoid overhead
+ else if ( (ElVal->GetGroup() == 0x0009) &&
+ ( (ElVal->GetElement() == 0x1113) || (ElVal->GetElement() == 0x1114) ) ){
+ FoundLength =4;
+ ElVal->SetReadLength(4); // a bug is to be fixed
+ }
+ // end of fix
+
+ // to try to 'go inside' SeQuences (with length), and not to skip them
+ else if ( ElVal->GetVR() == "SQ") {
+ if (enableSequences) // only if the user does want to !
+ FoundLength =0;
+ }
+
+ ElVal->SetUsableLength(FoundLength);
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief Apply some heuristics to predict wether the considered
+ * element value contains/represents an integer or not.
+ * @param ElVal The element value on which to apply the predicate.
+ * @return The result of the heuristical predicate.
+ */
+bool gdcmHeader::IsAnInteger(gdcmElValue * ElVal) {
+ guint16 element = ElVal->GetElement();
+ guint16 group = ElVal->GetGroup();
+ std::string vr = ElVal->GetVR();
+ guint32 length = ElVal->GetLength();
+
+ // When we have some semantics on the element we just read, and if we
+ // a priori know we are dealing with an integer, then we shall be
+ // able to swap it's element value properly.
+ if ( element == 0 ) { // This is the group length of the group
+ if (length == 4)
+ return true;
+ else {
+ std::ostringstream s;
+ s << "Erroneous Group Length element length on :" \
+ << std::hex << group << " , " << element;
+ dbg.Error("gdcmHeader::IsAnInteger",
+ s.str().c_str());
+ }
+ }
+ if ( (vr == "UL") || (vr == "US") || (vr == "SL") || (vr == "SS") )
+ return true;
+
+ return false;
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief Reads a supposed to be 16 Bits integer
+ * \ (swaps it depending on processor endianity)
+ *
+ * @return integer acts as a boolean
+ */
+guint16 gdcmHeader::ReadInt16(void) {
+ guint16 g;
+ size_t item_read;
+ item_read = fread (&g, (size_t)2,(size_t)1, fp);
+ if ( item_read != 1 ) {
+ // dbg.Verbose(0, "gdcmHeader::ReadInt16", " Failed to read :");
+ // if(feof(fp))
+ // dbg.Verbose(0, "gdcmHeader::ReadInt16", " End of File encountered");
+ if(ferror(fp))
+ dbg.Verbose(0, "gdcmHeader::ReadInt16", " File Error");
+ errno = 1;
+ return 0;
+ }
+ errno = 0;
+ g = SwapShort(g);
+ return g;
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief Reads a supposed to be 32 Bits integer
+ * \ (swaps it depending on processor endianity)
+ *
+ * @return
+ */
+guint32 gdcmHeader::ReadInt32(void) {
+ guint32 g;
+ size_t item_read;
+ item_read = fread (&g, (size_t)4,(size_t)1, fp);
+ if ( item_read != 1 ) {
+ //dbg.Verbose(0, "gdcmHeader::ReadInt32", " Failed to read :");
+ //if(feof(fp))
+ // dbg.Verbose(0, "gdcmHeader::ReadInt32", " End of File encountered");
+ if(ferror(fp))
+ dbg.Verbose(0, "gdcmHeader::ReadInt32", " File Error");
+ errno = 1;
+ return 0;
+ }
+ errno = 0;
+ g = SwapLong(g);
+ return g;
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief
+ *
+ * @return
+ */
+void gdcmHeader::SkipBytes(guint32 NBytes) {
+ //FIXME don't dump the returned value
+ (void)fseek(fp, (long)NBytes, SEEK_CUR);
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief
+ */
+void gdcmHeader::Initialise(void) {
+ dicom_vr = gdcmGlobal::GetVR();
+ dicom_ts = gdcmGlobal::GetTS();
+ Dicts = gdcmGlobal::GetDicts();
+ RefPubDict = Dicts->GetDefaultPubDict();
+ RefShaDict = (gdcmDict*)0;
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief Discover what the swap code is (among little endian, big endian,
+ * bad little endian, bad big endian).
+ *
+ */
+void gdcmHeader::CheckSwap()
+{
+ // Fourth semantics:
+ //
+ // ---> Warning : This fourth field is NOT part
+ // of the 'official' Dicom Dictionnary
+ // and should NOT be used.
+ // (Not defined for all the groups
+ // may be removed in a future release)
+ //
+ // CMD Command
+ // META Meta Information
+ // DIR Directory
+ // ID
+ // PAT Patient
+ // ACQ Acquisition
+ // REL Related
+ // IMG Image
+ // SDY Study
+ // VIS Visit
+ // WAV Waveform
+ // PRC
+ // DEV Device
+ // NMI Nuclear Medicine
+ // MED
+ // BFS Basic Film Session
+ // BFB Basic Film Box
+ // BIB Basic Image Box
+ // BAB
+ // IOB
+ // PJ
+ // PRINTER
+ // RT Radio Therapy
+ // DVH
+ // SSET
+ // RES Results
+ // CRV Curve
+ // OLY Overlays
+ // PXL Pixels
+ // DL Delimiters
+ //
+
+ // The only guaranted way of finding the swap code is to find a
+ // group tag since we know it's length has to be of four bytes i.e.
+ // 0x00000004. Finding the swap code in then straigthforward. Trouble
+ // occurs when we can't find such group...
+ guint32 s;
+ guint32 x=4; // x : for ntohs
+ bool net2host; // true when HostByteOrder is the same as NetworkByteOrder
+
+ int lgrLue;
+ char * entCur;
+ char deb[HEADER_LENGTH_TO_READ];
+
+ // First, compare HostByteOrder and NetworkByteOrder in order to
+ // determine if we shall need to swap bytes (i.e. the Endian type).
+ if (x==ntohs(x))
+ net2host = true;
+ else
+ net2host = false;
+ //cout << net2host << endl;
+
+ // The easiest case is the one of a DICOM header, since it possesses a
+ // file preamble where it suffice to look for the string "DICM".
+ lgrLue = fread(deb, 1, HEADER_LENGTH_TO_READ, fp);
+
+ entCur = deb + 128;
+ if(memcmp(entCur, "DICM", (size_t)4) == 0) {
+ dbg.Verbose(1, "gdcmHeader::CheckSwap:", "looks like DICOM Version3");
+ // Next, determine the value representation (VR). Let's skip to the
+ // first element (0002, 0000) and check there if we find "UL"
+ // - or "OB" if the 1st one is (0002,0001) -,
+ // in which case we (almost) know it is explicit VR.
+ // WARNING: if it happens to be implicit VR then what we will read
+ // is the length of the group. If this ascii representation of this
+ // length happens to be "UL" then we shall believe it is explicit VR.
+ // FIXME: in order to fix the above warning, we could read the next
+ // element value (or a couple of elements values) in order to make
+ // sure we are not commiting a big mistake.
+ // We need to skip :
+ // * the 128 bytes of File Preamble (often padded with zeroes),
+ // * the 4 bytes of "DICM" string,
+ // * the 4 bytes of the first tag (0002, 0000),or (0002, 0001)
+ // i.e. a total of 136 bytes.
+ entCur = deb + 136;
+ // FIXME
+ // Use gdcmHeader::dicom_vr to test all the possibilities
+ // instead of just checking for UL, OB and UI !?
+ if( (memcmp(entCur, "UL", (size_t)2) == 0) ||
+ (memcmp(entCur, "OB", (size_t)2) == 0) ||
+ (memcmp(entCur, "UI", (size_t)2) == 0) )
+ {
+ filetype = ExplicitVR;
+ dbg.Verbose(1, "gdcmHeader::CheckSwap:",
+ "explicit Value Representation");
+ } else {
+ filetype = ImplicitVR;
+ dbg.Verbose(1, "gdcmHeader::CheckSwap:",
+ "not an explicit Value Representation");
+ }
+ if (net2host) {
+ sw = 4321;
+ dbg.Verbose(1, "gdcmHeader::CheckSwap:",
+ "HostByteOrder != NetworkByteOrder");
+ } else {
+ sw = 0;
+ dbg.Verbose(1, "gdcmHeader::CheckSwap:",
+ "HostByteOrder = NetworkByteOrder");
+ }
+
+ // Position the file position indicator at first tag (i.e.
+ // after the file preamble and the "DICM" string).
+ rewind(fp);
+ fseek (fp, 132L, SEEK_SET);
+ return;
+ } // End of DicomV3
+
+ // Alas, this is not a DicomV3 file and whatever happens there is no file
+ // preamble. We can reset the file position indicator to where the data
+ // is (i.e. the beginning of the file).
+ dbg.Verbose(1, "gdcmHeader::CheckSwap:", "not a DICOM Version3 file");
+ rewind(fp);
+
+ // Our next best chance would be to be considering a 'clean' ACR/NEMA file.
+ // By clean we mean that the length of the first tag is written down.
+ // If this is the case and since the length of the first group HAS to be
+ // four (bytes), then determining the proper swap code is straightforward.
+
+ entCur = deb + 4;
+ // We assume the array of char we are considering contains the binary
+ // representation of a 32 bits integer. Hence the following dirty
+ // trick :
+ s = *((guint32 *)(entCur));
+
+ switch (s) {
+ case 0x00040000 :
+ sw = 3412;
+ filetype = ACR;
+ return;
+ case 0x04000000 :
+ sw = 4321;
+ filetype = ACR;
+ return;
+ case 0x00000400 :
+ sw = 2143;
+ filetype = ACR;
+ return;
+ case 0x00000004 :
+ sw = 0;
+ filetype = ACR;
+ return;
+ default :
+ dbg.Verbose(0, "gdcmHeader::CheckSwap:",
+ "ACR/NEMA unfound swap info (time to raise bets)");
+ }
+
+ // We are out of luck. It is not a DicomV3 nor a 'clean' ACR/NEMA file.
+ // It is time for despaired wild guesses. So, let's assume this file
+ // happens to be 'dirty' ACR/NEMA, i.e. the length of the group is
+ // not present. Then the only info we have is the net2host one.
+ filetype = Unknown;
+ if (! net2host )
+ sw = 0;
+ else
+ sw = 4321;
+ return;
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief
+ */
+void gdcmHeader::SwitchSwapToBigEndian(void) {
+ dbg.Verbose(1, "gdcmHeader::SwitchSwapToBigEndian",
+ "Switching to BigEndian mode.");
+ if ( sw == 0 ) {
+ sw = 4321;
+ return;
+ }
+ if ( sw == 4321 ) {
+ sw = 0;
+ return;
+ }
+ if ( sw == 3412 ) {
+ sw = 2143;
+ return;
+ }
+ if ( sw == 2143 )
+ sw = 3412;
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief
+ * @param NewSize
+ * @return
+ */
+void gdcmHeader::SetMaxSizeLoadElementValue(long NewSize) {
+ if (NewSize < 0)
+ return;
+ if ((guint32)NewSize >= (guint32)0xffffffff) {
+ MaxSizeLoadElementValue = 0xffffffff;
+ return;
+ }
+ MaxSizeLoadElementValue = NewSize;
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief Searches both the public and the shadow dictionary (when they
+ * exist) for the presence of the DictEntry with given
+ * group and element. The public dictionary has precedence on the
+ * shadow one.
+ * @param group group of the searched DictEntry
+ * @param element element of the searched DictEntry
+ * @return Corresponding DictEntry when it exists, NULL otherwise.
+ */
+gdcmDictEntry * gdcmHeader::GetDictEntryByNumber(guint16 group,
+ guint16 element) {
+ gdcmDictEntry * found = (gdcmDictEntry*)0;
+ if (!RefPubDict && !RefShaDict) {
+ dbg.Verbose(0, "gdcmHeader::GetDictEntry",
+ "we SHOULD have a default dictionary");
+ }
+ if (RefPubDict) {
+ found = RefPubDict->GetTagByNumber(group, element);
+ if (found)
+ return found;
+ }
+ if (RefShaDict) {
+ found = RefShaDict->GetTagByNumber(group, element);
+ if (found)
+ return found;
+ }
+ return found;
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief Searches both the public and the shadow dictionary (when they
+ * exist) for the presence of the DictEntry with given name.
+ * The public dictionary has precedence on the shadow one.
+ * @param Name name of the searched DictEntry
+ * @return Corresponding DictEntry when it exists, NULL otherwise.
+ */
+gdcmDictEntry * gdcmHeader::GetDictEntryByName(std::string Name) {
+ gdcmDictEntry * found = (gdcmDictEntry*)0;
+ if (!RefPubDict && !RefShaDict) {
+ dbg.Verbose(0, "gdcmHeader::GetDictEntry",
+ "we SHOULD have a default dictionary");
+ }
+ if (RefPubDict) {
+ found = RefPubDict->GetTagByName(Name);
+ if (found)
+ return found;
+ }
+ if (RefShaDict) {
+ found = RefShaDict->GetTagByName(Name);
+ if (found)
+ return found;
+ }
+ return found;
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief Read the next tag but WITHOUT loading it's value
+ * @return On succes the newly created ElValue, NULL on failure.
+ */
+gdcmElValue * gdcmHeader::ReadNextElement(void) {
+
+ guint16 g,n;
+ gdcmElValue * NewElVal;
+
+ g = ReadInt16();
+ n = ReadInt16();
+
+ if (errno == 1)
+ // We reached the EOF (or an error occured) and header parsing
+ // has to be considered as finished.
+ return (gdcmElValue *)0;
+
+ NewElVal = NewElValueByNumber(g, n);
+ FindVR(NewElVal);
+ FindLength(NewElVal);
- for (TagElValueHT::iterator tag = ht.begin(); tag != ht.end(); ++tag) {
- LoadElementValue(tag->second);
- }
+ if (errno == 1) {
+ // Call it quits
+ return (gdcmElValue *)0;
+ }
+ NewElVal->SetOffset(ftell(fp));
+ //if ( (g==0x7fe0) && (n==0x0010) )
+ return NewElVal;
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief Build a new Element Value from all the low level arguments.
+ * Check for existence of dictionary entry, and build
+ * a default one when absent.
+ * @param Name Name of the underlying DictEntry
+ */
+gdcmElValue* gdcmHeader::NewElValueByName(std::string Name) {
+
+ gdcmDictEntry * NewTag = GetDictEntryByName(Name);
+ if (!NewTag)
+ NewTag = new gdcmDictEntry(0xffff, 0xffff, "LO", "Unknown", Name);
+
+ gdcmElValue* NewElVal = new gdcmElValue(NewTag);
+ if (!NewElVal) {
+ dbg.Verbose(1, "gdcmHeader::ObtainElValueByName",
+ "failed to allocate gdcmElValue");
+ return (gdcmElValue*)0;
+ }
+ return NewElVal;
+}
+
+/**
+ * \ingroup gdcmHeader
+ * \brief Build a new Element Value from all the low level arguments.
+ * Check for existence of dictionary entry, and build
+ * a default one when absent.
+ * @param Group group of the underlying DictEntry
+ * @param Elem element of the underlying DictEntry
+ */
+gdcmElValue* gdcmHeader::NewElValueByNumber(guint16 Group, guint16 Elem) {
+ // Find out if the tag we encountered is in the dictionaries:
+ gdcmDictEntry * NewTag = GetDictEntryByNumber(Group, Elem);
+ if (!NewTag)
+ NewTag = new gdcmDictEntry(Group, Elem);
+
+ gdcmElValue* NewElVal = new gdcmElValue(NewTag);
+ if (!NewElVal) {
+ dbg.Verbose(1, "gdcmHeader::NewElValueByNumber",
+ "failed to allocate gdcmElValue");
+ return (gdcmElValue*)0;
+ }
+ return NewElVal;
}
-void gdcmHeader::PrintPubElVal(ostream & os) {
- PubElVals.Print(os);
+/**
+ * \ingroup gdcmHeader
+ * \brief Searches within the public dictionary for a Dicom Element of
+ * a given tag.
+ * @param tagName name of the searched Dicom Element.
+ * @return Corresponding Dicom Element when it exists, and NULL
+ * otherwise.
+ */
+ gdcmElValue* gdcmHeader::GetElementByName(std::string tagName) {
+ gdcmDictEntry *dictEntry = RefPubDict->GetTagByName(tagName);
+ if( dictEntry == NULL)
+ return (gdcmElValue*)NULL;
+ return(PubElValSet.GetElementByNumber(dictEntry->GetGroup(),
+ dictEntry->GetElement()));
}
-void gdcmHeader::PrintPubDict(ostream & os) {
- RefPubDict->Print(os);
+/**
+ * \ingroup gdcmHeader
+ * \brief Small utility function that creates a new manually crafted
+ * (as opposed as read from the file) gdcmElValue with user
+ * specified name and adds it to the public tag hash table.
+ * \note A fake TagKey is generated so the PubDict can keep it's coherence.
+ * @param NewTagName The name to be given to this new tag.
+ * @param VR The Value Representation to be given to this new tag.
+ * @ return The newly hand crafted Element Value.
+ */
+gdcmElValue* gdcmHeader::NewManualElValToPubDict(std::string NewTagName,
+ std::string VR) {
+ gdcmElValue* NewElVal = (gdcmElValue*)0;
+ guint32 StuffGroup = 0xffff; // Group to be stuffed with additional info
+ guint32 FreeElem = 0;
+ gdcmDictEntry* NewEntry = (gdcmDictEntry*)0;
+
+ FreeElem = PubElValSet.GenerateFreeTagKeyInGroup(StuffGroup);
+ if (FreeElem == UINT32_MAX) {
+ dbg.Verbose(1, "gdcmHeader::NewManualElValToPubDict",
+ "Group 0xffff in Public Dict is full");
+ return (gdcmElValue*)0;
+ }
+ NewEntry = new gdcmDictEntry(StuffGroup, FreeElem,
+ VR, "GDCM", NewTagName);
+ NewElVal = new gdcmElValue(NewEntry);
+ PubElValSet.Add(NewElVal);
+ return NewElVal;
}
+
+//-----------------------------------------------------------------------------
git://git.creatis.insa-lyon.fr / gdcm.git / blobdiff