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gdcmReader.h
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    00001 /*=========================================================================
    00002
    00003   Program: GDCM (Grassroots DICOM). A DICOM library
    00004
    00005   Copyright (c) 2006-2011 Mathieu Malaterre
    00006   All rights reserved.
    00007   See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
    00008
    00009      This software is distributed WITHOUT ANY WARRANTY; without even
    00010      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
    00011      PURPOSE.  See the above copyright notice for more information.
    00012
    00013 =========================================================================*/
    00014
    00015 #ifndef GDCMREADER_H
    00016 #define GDCMREADER_H
    00017
    00018 #include "gdcmFile.h"
    00019
    00020
    00021 #include <fstream>
    00022
    00023 namespace gdcm
    00024 {
    00025   class StreamImageReader;
    00055 class GDCM_EXPORT Reader
    00056 {
    00057 public:
    00058   Reader():F(new File){
    00059     Stream = NULL;
    00060     Ifstream = NULL;
    00061   }
    00062   virtual ~Reader();
    00063
    00065   virtual bool Read(); // Execute()
    00066
    00069   void SetFileName(const char *filename_native);
    00070
    00072   void SetStream(std::istream &input_stream) {
    00073     Stream = &input_stream;
    00074   }
    00075
    00077   const File &GetFile() const { return *F; }
    00078
    00080   File &GetFile() { return *F; }
    00081
    00083   void SetFile(File& file) { F = &file; }
    00084
    00087   bool ReadUpToTag(const Tag & tag, std::set<Tag> const & skiptags = std::set<Tag>() );
    00088
    00090   bool ReadSelectedTags(std::set<Tag> const & tags);
    00091
    00094   bool CanRead() const;
    00095
    00096 protected:
    00097   bool ReadPreamble();
    00098   bool ReadMetaInformation();
    00099   bool ReadDataSet();
    00100
    00101   SmartPointer<File> F;
    00102
    00103   friend class StreamImageReader; //need to be friended to be able to grab the GetStreamPtr
    00104
    00105   //this function is added for the StreamImageReader, which needs to read
    00106   //up to the pixel data and then stops right before reading the pixel data.
    00107   //it's used to get that position, so that reading can continue
    00108   //apace once the read function is called.
    00109   //so, this function gets the stream directly, and then allows for position information
    00110   //from the tellg function, and allows for stream/pointer manip in order
    00111   //to read the pixel data.  Note, of course, that reading pixel elements
    00112   //will still have to be subject to endianness swaps, if necessary.
    00113   std::istream* GetStreamPtr() const { return Stream; }
    00114
    00115 private:
    00116   template <typename T_Caller>
    00117   bool InternalReadCommon(const T_Caller &caller);
    00118   TransferSyntax GuessTransferSyntax();
    00119   std::istream *Stream;
    00120   std::ifstream *Ifstream;
    00121 };
    00122
    00129 } // end namespace gdcm
    00130
    00131
    00132 #endif //GDCMREADER_H