vtkDICOMDictionary.h

/*=========================================================================
 
  Program: DICOM for VTK
 
  Copyright (c) 2012-2024 David Gobbi
  All rights reserved.
  See Copyright.txt or http://dgobbi.github.io/bsd3.txt for details.
 
     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.
 
=========================================================================*/
#ifndef vtkDICOMDictionary_h
#define vtkDICOMDictionary_h
 
#include "vtkDICOMModule.h" // For export macro
#include "vtkDICOMDictEntry.h"
#include "vtkDICOMDictHash.h"
 
#define DICT_HASH_TABLE_SIZE 4096
#define DICT_PRIVATE_TABLE_SIZE 512
 
class VTKDICOM_EXPORT vtkDICOMDictionary
{
public:
  struct Dict
  {
    const char *Name;
    unsigned short HashSize;
    unsigned short DataSize;
    const unsigned short *TagHashTable;
    const unsigned short *KeyHashTable;
    const vtkDICOMDictEntry::Entry *Contents;
  };
 
  struct DictHashEntry;
 
  static vtkDICOMDictEntry FindDictEntry(const vtkDICOMTag tag) {
    return vtkDICOMDictionary::FindDictEntry(tag, nullptr); }
 
  static vtkDICOMDictEntry FindDictEntry(const char *key) {
    return vtkDICOMDictionary::FindDictEntry(key, nullptr); }
 
 
  static vtkDICOMDictEntry FindDictEntry(
    const vtkDICOMTag tag, const char *privateDict);
 
 
  static vtkDICOMDictEntry FindDictEntry(
    const char *key, const char *privateDict);
 
 
  static void AddPrivateDictionary(Dict *dict);
 
  static void RemovePrivateDictionary(const char *name);
 
private:
  friend class vtkDICOMDictionaryInitializer;
 
 
  static unsigned int HashLongString(const char *lo, char stripped[64]);
 
 
  static Dict *FindPrivateDict(const char *name);
 
  static Dict DictData;
 
  static DictHashEntry *PrivateDictTable[DICT_PRIVATE_TABLE_SIZE];
};
 
 
class VTKDICOM_EXPORT vtkDICOMDictionaryInitializer
{
public:
  vtkDICOMDictionaryInitializer();
  ~vtkDICOMDictionaryInitializer();
private:
  vtkDICOMDictionaryInitializer(const vtkDICOMDictionaryInitializer&);
  vtkDICOMDictionaryInitializer& operator=(
    const vtkDICOMDictionaryInitializer&);
};
 
static vtkDICOMDictionaryInitializer vtkDICOMDictionaryInitializerInstance;
 
#endif /* vtkDICOMDictionary_h */
// VTK-HeaderTest-Exclude: vtkDICOMDictionary.h