Program: gdcm
Module: $RCSfile: gdcmDocument.cxx,v $
Language: C++
- Date: $Date: 2004/08/01 03:20:23 $
- Version: $Revision: 1.63 $
+ Date: $Date: 2004/08/02 16:42:14 $
+ Version: $Revision: 1.65 $
Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
l'Image). All rights reserved. See Doc/License.txt or
#include "gdcmUtil.h"
#include "gdcmDebug.h"
-#include <errno.h>
#include <vector>
// For nthos:
/**
* \brief constructor
* @param inFilename file to be opened for parsing
- * @param exception_on_error whether we throw an exception or not
*/
-gdcmDocument::gdcmDocument( std::string const & filename,
- bool exception_on_error)
+gdcmDocument::gdcmDocument( std::string const & filename )
: gdcmElementSet(-1)
{
SetMaxSizeLoadEntry(MAX_SIZE_LOAD_ELEMENT_VALUE);
Filename = filename;
Initialise();
- if ( !OpenFile(exception_on_error))
+ if ( !OpenFile() )
{
return;
}
CloseFile();
// --------------------------------------------------------------
- // Special Patch to allow gdcm to read ACR-LibIDO formated images
+ // Specific code to allow gdcm to read ACR-LibIDO formated images
+ // Note: ACR-LibIDO is an extension of the ACR standard that was
+ // used at CREATIS. For the time being (say a couple years)
+ // we keep this kludge to allow a smooth move to gdcm for
+ // CREATIS developpers (sorry folks).
//
// if recognition code tells us we deal with a LibIDO image
// we switch lineNumber and columnNumber
SetEntryByNumber(columns, 0x0028, 0x0010);
SetEntryByNumber(rows , 0x0028, 0x0011);
}
- // ----------------- End of Special Patch ----------------
+ // ----------------- End of ACR-LibIDO kludge ------------------
PrintLevel = 1; // 'Medium' print level by default
}
/**
- * \brief constructor
- * @param exception_on_error
+ * \brief This default constructor doesn't parse the file. You should
+ * then invoke \ref gdcmDocument::SetFileName and then the parsing.
*/
-gdcmDocument::gdcmDocument(bool exception_on_error)
+gdcmDocument::gdcmDocument()
:gdcmElementSet(-1)
{
- (void)exception_on_error;
-
SetMaxSizeLoadEntry(MAX_SIZE_LOAD_ELEMENT_VALUE);
Initialise();
-
PrintLevel = 1; // 'Medium' print level by default
}
}
/**
- * \brief opens the file
- * @param exception_on_error
- * @return
+ * \brief Tries to open the file \ref gdcmDocument::Filename and
+ * checks the preamble when existing.
+ * @return The FILE pointer on success.
*/
-FILE *gdcmDocument::OpenFile(bool exception_on_error)
- throw(gdcmFileError)
+FILE* gdcmDocument::OpenFile()
{
- Fp = fopen(Filename.c_str(),"rb");
-
- if(!Fp)
- {
- if(exception_on_error)
- {
- throw gdcmFileError("gdcmDocument::gdcmDocument(const char *, bool)");
- }
- else
- {
- dbg.Verbose(0, "gdcmDocument::OpenFile cannot open file: ",
- Filename.c_str());
- return NULL;
- }
- }
-
- if ( Fp )
- {
- uint16_t 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;
- }
+ Fp = fopen(Filename.c_str(),"rb");
- //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, "gdcmDocument::OpenFile not DICOM/ACR", Filename.c_str());
- }
- else
- {
- dbg.Verbose(0, "gdcmDocument::OpenFile cannot open file", Filename.c_str());
- }
-
- return 0;
+ if(!Fp)
+ {
+ dbg.Verbose( 0,
+ "gdcmDocument::OpenFile cannot open file: ",
+ Filename.c_str());
+ return 0;
+ }
+
+ uint16_t 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,
+ "gdcmDocument::OpenFile not DICOM/ACR (missing preamble)",
+ Filename.c_str());
+
+ return 0;
}
/**
}
// to be sure we are at the end of the value ...
fseek(Fp, (long)entry->GetOffset()+(long)entry->GetLength(), SEEK_SET);
-
- return; //FIXME FIXME FIXME FIXME ????
+ // Following return introduced by JPR on version 1.25. Since the
+ // treatement of a ValEntry is never executed (doh!) this means
+ // we were lucky up to now because we NEVER encountered a ValEntry
+ // whose length was bigger thant MaxSizeLoadEntry !? I can't believe
+ // this could ever work...
+ return; //FIXME FIXME FIXME FIXME JPR ????
// Be carefull : a BinEntry IS_A ValEntry ...
if (gdcmValEntry* valEntryPtr = dynamic_cast< gdcmValEntry* >(entry) )
* \brief Find the value Length of the passed Header Entry
* @param Entry Header Entry whose length of the value shall be loaded.
*/
-void gdcmDocument::FindDocEntryLength (gdcmDocEntry *entry)
+void gdcmDocument::FindDocEntryLength( gdcmDocEntry *entry )
+ throw ( gdcmFormatError )
{
uint16_t element = entry->GetElement();
std::string vr = entry->GetVR();
if ( vr == "OB" && length32 == 0xffffffff )
{
- uint32_t lengthOB = FindDocEntryLengthOB();
- if ( errno == 1 )
+ uint32_t lengthOB;
+ try
+ {
+ lengthOB = FindDocEntryLengthOB();
+ }
+ catch ( gdcmFormatUnexpected )
{
// Computing the length failed (this happens with broken
// files like gdcm-JPEG-LossLess3a.dcm). We still have a
long lengthUntilEOF = ftell(Fp) - currentPosition;
fseek(Fp, currentPosition, SEEK_SET);
entry->SetLength(lengthUntilEOF);
- errno = 0;
return;
}
entry->SetLength(lengthOB);
{
if ( !IsExplicitVRBigEndianTransferSyntax() )
{
- dbg.Verbose(0, "gdcmDocument::FindLength", "not explicit VR");
- errno = 1;
+ throw gdcmFormatError( "gdcmDocument::FindDocEntryLength()",
+ " not explicit VR." );
return;
}
length16 = 4;
// Heuristic: well, some files are really ill-formed.
if ( length16 == 0xffff)
{
+ // 0xffff means that we deal with 'Unknown Length' Sequence
length16 = 0;
- // Length16= 0xffff means that we deal with
- // 'Unknown Length' Sequence
}
- FixDocEntryFoundLength(entry, (uint32_t)length16);
+ FixDocEntryFoundLength( entry, (uint32_t)length16 );
return;
}
else
// not coexist in a Data Set and Data Sets nested within it".]
// Length is on 4 bytes.
- FixDocEntryFoundLength(entry, ReadInt32());
+ FixDocEntryFoundLength( entry, ReadInt32() );
return;
}
}
*/
uint32_t gdcmDocument::FindDocEntryLengthOB()
+ throw( gdcmFormatUnexpected )
{
// See PS 3.5-2001, section A.4 p. 49 on encapsulation of encoded pixel data.
long positionOnEntry = ftell(Fp);
while ( !foundSequenceDelimiter )
{
- uint16_t g = ReadInt16();
- uint16_t n = ReadInt16();
- if ( errno == 1 )
+ uint16_t group;
+ uint16_t elem;
+ try
{
- return 0;
+ group = ReadInt16();
+ elem = ReadInt16();
+ }
+ catch ( gdcmFormatError )
+ {
+ throw gdcmFormatError("gdcmDocument::FindDocEntryLengthOB()",
+ " group or element not present.");
}
// We have to decount the group and element we just read
totalLength += 4;
- if ( g != 0xfffe || ( n != 0xe0dd && n != 0xe000 ) )
+ if ( group != 0xfffe || ( ( elem != 0xe0dd ) && ( elem != 0xe000 ) ) )
{
- dbg.Verbose(1, "gdcmDocument::FindLengthOB: neither an Item tag "
- "nor a Sequence delimiter tag.");
+ dbg.Verbose(1, "gdcmDocument::FindDocEntryLengthOB: neither an Item "
+ "tag nor a Sequence delimiter tag.");
fseek(Fp, positionOnEntry, SEEK_SET);
- errno = 1;
- return 0;
+ throw gdcmFormatUnexpected("gdcmDocument::FindDocEntryLengthOB()",
+ "Neither an Item tag nor a Sequence "
+ "delimiter tag.");
}
- if ( n == 0xe0dd )
+ if ( elem == 0xe0dd )
{
foundSequenceDelimiter = true;
}
* @return read value
*/
uint16_t gdcmDocument::ReadInt16()
+ throw( gdcmFormatError )
{
uint16_t g;
size_t item_read = fread (&g, (size_t)2,(size_t)1, Fp);
{
if( ferror(Fp) )
{
- dbg.Verbose(0, "gdcmDocument::ReadInt16", " File Error");
+ throw gdcmFormatError( "gdcmDocument::ReadInt16()", " file error." );
}
- errno = 1;
- return 0;
+ throw gdcmFormatError( "gdcmDocument::ReadInt16()", "EOF." );
}
- errno = 0;
g = SwapShort(g);
return g;
}
* @return read value
*/
uint32_t gdcmDocument::ReadInt32()
+ throw( gdcmFormatError )
{
uint32_t g;
size_t item_read = fread (&g, (size_t)4,(size_t)1, Fp);
{
if( ferror(Fp) )
{
- dbg.Verbose(0, "gdcmDocument::ReadInt32", " File Error");
+ throw gdcmFormatError( "gdcmDocument::ReadInt16()", " file error." );
}
- errno = 1;
- return 0;
+ throw gdcmFormatError( "gdcmDocument::ReadInt32()", "EOF." );
}
- errno = 0;
g = SwapLong(g);
return g;
}
* gets the VR, gets the length, gets the offset value)
* @return On succes the newly created DocEntry, NULL on failure.
*/
-gdcmDocEntry *gdcmDocument::ReadNextDocEntry()
+gdcmDocEntry* gdcmDocument::ReadNextDocEntry()
{
- uint16_t g = ReadInt16();
- uint16_t n = ReadInt16();
+ uint16_t group;
+ uint16_t elem;
- if (errno == 1)
+ try
+ {
+ group = ReadInt16();
+ elem = ReadInt16();
+ }
+ catch ( gdcmFormatError e )
{
// We reached the EOF (or an error occured) therefore
// header parsing has to be considered as finished.
+ std::cout << e;
return 0;
}
- gdcmDocEntry *newEntry = NewDocEntryByNumber(g, n);
+ gdcmDocEntry *newEntry = NewDocEntryByNumber(group, elem);
FindDocEntryVR(newEntry);
- FindDocEntryLength(newEntry);
- if (errno == 1)
+ try
+ {
+ FindDocEntryLength(newEntry);
+ }
+ catch ( gdcmFormatError e )
{
// Call it quits
+ std::cout << e;
delete newEntry;
return 0;
}
+
newEntry->SetOffset(ftell(Fp));
return newEntry;
git://git.creatis.insa-lyon.fr / gdcm.git / blobdiff