DcmHashDict Class Reference

a hash table of pointers to DcmDictEntry objects More...

Public Member Functions
	DcmHashDict ()
	default constructor
	~DcmHashDict ()
	destructor
int	size () const
	counts total number of entries
void	clear ()
	clears the hash table of all entries
void	put (DcmDictEntry *entry)
	inserts an entry into hash table (deletes old entry if present)
const DcmDictEntry *	get (const DcmTagKey &key, const char *privCreator) const
	hash table lookup for the given tag key and private creator name
void	del (const DcmTagKey &key, const char *privCreator)
	deletes the entry for the given tag and private creator identifier
DcmHashDictIterator	begin () const
	returns iterator to start of hash table
DcmHashDictIterator	end () const
	returns iterator to end of hash table
STD_NAMESPACE ostream &	loadSummary (STD_NAMESPACE ostream &out)
	prints some information about hash table bucket utilization

Private Member Functions
	DcmHashDict (const DcmHashDict &)
	private unimplemented copy constructor
DcmHashDict &	operator= (const DcmHashDict &)
	private unimplemented copy assignment operator
void	_init ()
	performs initialization for given hash table size, called from constructor
int	hash (const DcmTagKey *key, const char *privCreator) const
	compute hash value for given tag key
DcmDictEntry *	insertInList (DcmDictEntryList &lst, DcmDictEntry *entry)
	inserts new entry into given list
DcmDictEntry *	removeInList (DcmDictEntryList &lst, const DcmTagKey &key, const char *privCreator)
	removes the entry for the given tag and private creator identifier
DcmDictEntry *	findInList (DcmDictEntryList &lst, const DcmTagKey &key, const char *privCreator) const
	searches entry for the given tag and private creator identifier

Private Attributes
DcmDictEntryList **	hashTab
	array of (hash table size) pointers to DcmDictEntryList elements implementing the different buckets of the hash table
int	lowestBucket
	index of lowest bucket for which the DcmDictEntryList has been initialized
int	highestBucket
	index of highest bucket for which the DcmDictEntryList has been initialized
int	entryCount
	number of entries in hash table

Static Private Attributes
static const int	hashTabLength
	number of buckets in hash table

Friends
class	DcmHashDictIterator

Detailed Description

a hash table of pointers to DcmDictEntry objects

Member Function Documentation

del()

void DcmHashDict::del	(	const DcmTagKey &	key,
		const char *	privCreator )

deletes the entry for the given tag and private creator identifier

Parameters

key	tag key of the entry to be deleted
privCreator	private creator identifier, may be NULL

findInList()

DcmDictEntry * DcmHashDict::findInList ( DcmDictEntryList & lst, const DcmTagKey & key, const char * privCreator ) const

private

searches entry for the given tag and private creator identifier

Parameters

lst	list to search in
key	tag key of the entry to be searched for
privCreator	private creator identifier, may be NULL

Returns

pointer to found element, NULL if not found

get()

const DcmDictEntry * DcmHashDict::get	(	const DcmTagKey &	key,
		const char *	privCreator ) const

hash table lookup for the given tag key and private creator name

Parameters

key	tag key of the entry to be searched for
privCreator	private creator identifier, may be NULL

Returns

pointer to entry (if found), otherwise NULL

hash()

int DcmHashDict::hash ( const DcmTagKey * key, const char * privCreator ) const

private

compute hash value for given tag key

Parameters

key	pointer to tag key
privCreator	private creator identifier, may be NULL

Returns

hash value

insertInList()

DcmDictEntry * DcmHashDict::insertInList ( DcmDictEntryList & lst, DcmDictEntry * entry )

private

inserts new entry into given list

Parameters

lst	list to add to
entry	new element to add, will be deleted upon destruction of the hash table

Returns

pointer to replaced element, if any

loadSummary()

STD_NAMESPACE ostream & DcmHashDict::loadSummary

(

STD_NAMESPACE ostream &

out

)

prints some information about hash table bucket utilization

Parameters

out	the stream to print into

put()

void DcmHashDict::put

(

DcmDictEntry *

entry

)

inserts an entry into hash table (deletes old entry if present)

Parameters

entry

pointer to new entry

removeInList()

DcmDictEntry * DcmHashDict::removeInList ( DcmDictEntryList & lst, const DcmTagKey & key, const char * privCreator )

private

removes the entry for the given tag and private creator identifier

Parameters

lst	list to remove from
key	tag key of the entry to be removed
privCreator	private creator identifier, may be NULL

Returns

pointer to removed element, if any

size()

int DcmHashDict::size ( ) const

inline

counts total number of entries

Returns

number of entries

References entryCount.

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The documentation for this class was generated from the following file:

• dcmdata/include/dcmtk/dcmdata/dchashdi.h